cameras can be added to the wingtips as well. making eh gemini a pusher would put the props in turbulent air, and cause vibrations, but would work. similar to the piaggio avanti aircraft, they have unique noise profile, if you have ever heard one. that noise is the pressure differential from the wing hitting the props. i don't consider it a good thing, but it could be done.
i know that sound!! i fell in love with it's design, a few occasionally fly out of my airport where i work. i thought the noise was caused by the exhaust hitting the props.
it would fly the furthest at a relatively high altitude, without descending, because the air is thinner, and travel through it is more efficient. This is the strategy behind commercial air flights, and the reason they expend extra fuel to get to their cruising altitude. at sea level, the theoretical max distance is 120 km, with the 3kg battery pack, in stock configuration.
I really like watching these kind of videos. I use fly weight shift ultralight trikes, but I can't afford it anymore. So this is the next best thing. I disabled & was wonder how much a basic setup like yours would cost. I would really like to purchase to purchase a glider, & perhaps make it solar powered to help make the battery life longer.
Nice flight! If you are planning to fly with no power on a regular basis, I recommend you look to set the speed controllers up to brake the motors and stop the props freewheeling. This would reduce the drag significantly.
yes, you are absolutely correct, but if you notice, I actually put the plane in a slight dive, to bleed off altitude, as a glide for that height could take over an hour. so i actually wanted the extra drag. you could get a longer flight time with the brake on for sure.
My answer wasn't entirely right,i had forgotten about parasitic drag on a freewheeling prop. The answer is,for a given prop with a given pitch and given length, whether or not one should leave it freewheeling depends on the gliding speed. Here is a paper with test data i found: www.peter2000.co.uk/aviation/misc/prop.pdf Anyway a collapsing prop is the best solution :)
This plane will never stop impressing me. I wish that I got this instead of the skyhunter, but maybe Ill buy this next time. You are so high and the scenery looks so different than in America. In what country do you live, because it is so beautiful there.
+daniel perkins Mexico. thanks for the compliments. it's nice weaterh here, but not worth the trouble. living here is not easy. better off in U.S. overall.
Wow what an awesome aircraft! I like that's its the controls are kept simple, as ailerons are just not necessary for an airplane built for this purpose.
+Barrett Powell The FAA is a rouge agency, acting directly agains it's congressional mandate. fly safe. you're not a real threat. don't let them brainwash you.
I cant believe everyone went along and registered there model aircraft. Now they have funds to create more authority. Just wait. Ten years to register it will be thousand dollars and have to pay yearly taxes on our drones, force us to get a licence insurance.
That's pretty incredible! Great aerial view and I like the design of the plane. I see that this video is quite old. Are you guys still around and flying?
FPVREVIEWS no need to apologize for any delay. I only commented 10 minutes ago lol. So youve been in Africa....I bet that was exciting! I'm going to sub to your channel and I'll be checking out some of your other videos. I've recently gotten into semi long range fpv.
welcome to the channel. here is the latest video from Africa. ua-cam.com/video/-rl8nJTHrzg/v-deo.html Using a stock Gemini V-2 kit built version for counting animals on a private animal park over there, and doing perimeter fence inspections.
Wooooow! You released the V2 now! What's the total fight time? I see your descend took about 40 minutes and you were able to recharge the batteries! Amazing!
Any thoughts on putting the newer super-thin and light solar cells on the upper wing surfaces? There are single engine planes already on solar with sustaining battery life- they never run out. You could at least significantly increase duration this way...
What type of onboard oxygen system did you use to keep the pilot from passing out? Oh, never mind, you probably had a pressurized pilot compartment to handle all that pressure change. :)
Awesome I may try this system out. Currently running uhf fpv system our with GPS autopilot safety feature. I need to make a video soon. I fly this plane 24 miles out before turning around. Usually have to turn around due to battery flight time. My secret is I climb to the top of a fire tower locally that is 150ft high on top of a giant high elevation hill that sits about 200 feet above the rest of the area. I set up my equipment there. I've been testing the plane design to see how much weight it can carry efficiently without requiring so much more power. Reason im testing is because I may switch to diesel engines. The plane so far can carry 15lbs efficiently and 25lbs at max but it requires alot more throttle so I say 15lbs is perfect. That equals to almost 3 gallons of diesel. I may be able to reach much further out in range this way. What do you think?
Brilliant ideas...can the avionics autopilot ,tvtrans.engines ,esc,batteries etc.. defeat high weather tempreture of more than 40 centigrades working for more than 4hrs on 1000meters altitude ?
+Salih Mehdi temperatures get less at higher altitudes, not more. so, no problem, just need insulation for extreme altitudes, and extreme low temperatures. At these altitudes, it is not a problem. it would be interesting to add an outside air temperature sensor to the plane, however. also a barometric sensor, so sense density altitude. alternately, airspeed could be compared with average groundspeed.
I've seen two approaches to high altitude, using lift and climbing relativily slow, and climbing very fast. still not sure which is the best, but the fast method does not need a very big plane.. ha ha. sounds like your ranger would be somewhere in the middle. Looking forward to seeing it. What equip are you running?
this plane can be a spoting plane for arty and correct firing for them + what the range of this plane ? pretty nice plane you made there and sorry for my bad english
no concern. The area which we fly is a bit of a dead zone for air traffic between 100ft AGL and 20,000. we do monitor carefully for low level traffic. it's near an airport. this was also made before the regulations in our country.
On next flight can you mount one camera with no-distortion lens? Seems every go-pro or any other camera has wide-angle or fish-eye lens. Curious what horizon looks like in high altitude. Amazing work.
+Mark K from this altitude, no curvature is visible, if that's what you mean. i'll consider using some different settings on the go pro, as they have narrow field of view setting, which makes them look like a normal camera. thanks for your input!
+FPVREVIEWS Amazing what you can build and how high you can fly it. "... from this altitude, no curvature is visible..." Now I'm confused more than ever before. Thank you for your response.
+Mark K airliners fly about 2-3 times that high, and from them, you can't see the curvature, really very well. i think it's not clearly visible until something like 40-50 thousand feet, but i could be mistaken. i'm sure google or wiki would have some info.
+FPVREVIEWS here is something i found from an airline pilot: "From a friend who was a military pilot, and from sources such as the many books I have read on the SR-71 and U-2 it can be said that this doesn't appear until you get up to 55K-60K feet........ The highest I have been is 41K on a 777 and I couldn't see anything but a flat horizon." sounds like we need a better airplane, i will start designing it... LOL
+FPVREVIEWS Long story short friend of mine (deep thinker and thinks way too much) told me we live on FLAT EARTH. I laughed in his face and said few things. He challenged me to prove him wrong and I can't use NASA pics or any other pics using wide-angle or fish-eye lens. He said I will never see curvature with my own eyes because there is none. With Earth's size and mathematical formula we should see curvature when looking at horizon from high altitude. At 4k to 5k feet high we should see curvature and 20k feet high curvature should be obvious. More I research this more questions I have. WTF.
after watching this video again, I'm kinda surprised that you don't have the brake enabled on the esc's. Wouldn't enabling the esc brake, therefore stopping the propellers from spinning, reduce drag from the freewheeling props?
Nope,as the blades spin freely the drag is reduced compared to being still,u can figure this out considering when spinning,from the blade's frame of reference,the air is moving at angle closer to the chord of the blade. If you can minimize internal friction of the shaft this rotation speed increases to the point of 0 drag and you can have a glider that doesn't need to collapse its prop.
Yes, stopping the props would make it glide better. You can test by trying to autorotate your heli with and without the blades spinning and see which one comes down faster.
during autorotation the blades already have built in inertiawhich can produce lift when you turn up the pitch. however my answer isn't completely right. parasitic drag plays its role for a freewheeling propeller. i found a paper with test data.: www.peter2000.co.uk/aviation/misc/prop.pdf
hi ankurgokhale, have you become a flat earther yet? If not I suggest viewing the 13 part series _what on earth happened_ in my about to learn how the earth is not a globe
+OLEG69M there was still about 15% of the battery remaining. I have the ESC's set up to free-wheel, or turn freely, as it makes more drag, which helps to descend, and helps a little to flatten the glide slope for landing.
+OLEG69M the climb is with the motors running. the glide is with the motors not running. I shut them off, to keep a reserve of electrical power, in case i have to abort a landing, divert, or need power to get back to the landing zone.
Wouldn't the air there be incredibly cold and take a toll on the battery and control surface? I've seen high altitude pilots struggle with frozen servos before.
This is pretty impressive, but how do you know if you're remaining outside CAS? Also, you experienced a classic inversion - I've flown in quite a few (full size plane) and the transition from the bottom layer to the top is quite remarkable. The turbulence just gets switched off!
+cjm2005 we are outside the US, and at the time of filming, there were absolutely no rules regarding RC aircraft, etc. Here, the most dangerous place to fly is low over the designated model field. not much air traffic here anyways. yes, it's very neat to be able to get above the local weather. many times, i have noticed a slightly turbulent layer, about every 1000 to 2000 ft. and the wind direction seems to change and strength also, with every layer.
You need to do a bit of study on meteorology mate, it's absolutely fascinating, even more so when you see it in action in real life observations. en.wikipedia.org/wiki/Inversion_(meteorology) Also, due to the Coriolis effect and surface friction the wind direction and strength changes as you ascend - the general rule is 'increased (in strength) and veered (to the right) going up, slack (less strength) and back (to the left) coming down. You can access spot wind charts & use the forecast winds to decide on a cruising altitude if you want to do a long distance flight :)
yes, it would help, but for this flight, we were actually in a slight dive, and trying to bleed off kinetic energy to get back down more quickly. it would be nice to have options, though.
Hi there how did you get the transmitter and receiver very super long range is 13,000 ft is for your plane to control it to go to over the clouds but more high can you give a links please and receiver box and video transmitter is but the video transmitter on your plane but do you need power on your plane receiver or battery connected and power to video transmitter is but how did you get all hobby parts for your plane and connect two brushless motors on your plane can you give a links please
True, would reduce drag too and allow for longer flight times when climbing to altitude. For this flight, we actually welcomed the props spinning freely, and their extra drag, as we slightly held the nose down for most of the descent to get down quicker. there is also electronic braking for the props which will reduce drag and vibrations slightly, but we would rather have the drag for fast descents. the nacelles would have to be redesigned to use folding props, and probably move the motors further away from the wings to allow for rear-ward prop clearance when folded. Most flights have the motor running for almost the entire flight, up to 4+hours, and have no need to fold props. Would be interesting as an option though..
+Bill Bonovas Thanks for your interest! you should find all the info you need including plans info at out website: www.bearospaceindustries.com/store.html
And what kind speed controller did you use for your plane gets more strong give the brushless spins super faster and what kind propellers did you use can you give me a links please
So where i can buy those EZUHF rx and TX can you give me link of websites please but do you need taranis radio connects to EZUHF rx and TX and they needs to update it to use long range for your plane please
Hi FPV review, I really like the Gemini version 2 and have looked at the available blue print plans to build. I have builded aircraft from a kit. Just not sure I can build the Gemini from your plans . Do not know if I have enough know how to build. wish I had hands on or a very good video to go on, thank you. what do you suggest.
+Coolwater Hubby watch the build video,a nd maybe it will give you a better idea if you want to take on the project. for 15 dollars, you can get the plans, and at the very least, you will have them for later when you feel confident enough. here is slink to the build video: ua-cam.com/video/8DMduHD4pFk/v-deo.html let me know if yo have questions along the way. i keep a photo archive i can send by email if you need. cheers! Spike
But how did you get the antenna gives you 13,000 ft like very very super loong range like you can go more High but what kind fpv video transmitter did you use is and but how did you get the controller for your camera so you can move the camera any where on your plane from your rc plane transmitter is can you give me the links please
Um, no. at the relative speeds that our uav's travel, it would be fairly useless anyway, as we are not fast enough to get out of the way of all but the slowest manned aircraft. I think the key will be to make an aircraft which can climb vertically or descend vertically at a very high rate of climb, and in a efficient manner, also controlled, and safe. a hard problem, but one that tilt rotors and reversible/variable pitch thrust can solve. much better to use a system of shared V2V communication to share position and heading/speed date, i think. the automotive industry will probably provide a working solution there. it'll all come together, but will take some time, and there will be ranting and raving in the meantime. also bans, and arrests. basically, lots of hysteria. Sad.
FPVREVIEWS. I would say the question still stands. And I want it, or at least a form awareness. To avoid each other or simply know there is a jet three miles out and five miles up. Especially, because we can't say we won't continually push our limits. There are apps on my phone that allow me to see commercial planes and where they are in the sky in live feed. Tapping into data already available, and/or uploading our own location actively or indicating it passively. As I push the limits, I feel at least being able to transmit out something other aircraft can pick up would be easiest. Seems like if commercial aircraft tapped into our video out they could avoid us at least. Using a simple algorithm of the signal strength a manned aircraft can workout location, direction and speed. I Just have to imagine it is cheaper to pay engineers of the F35 and they have worked out how to avoid all objects in the sky vs the cost of repair or crash. I also hope their method of avoid is not to shoot us down. Ha ha
transponders are the current way of keeping traffic separation. as well as ADSB. This si a technical challenge, but a solvable one, and V2V communication, as i mentioned already exists, at least in working prototypes. Hard part about any of this tech is getting the government to approve it. V2V will be the first as it will make the roads safer pretty much immediately, so it's hard, and unpopular for the gov. to drag their feet on the implementation.
FPVREVIEWS. I will look into that tech. Certainly curious about size and weight possibilities. A lot of work for good reasons. yes, to be continued/stretched out.
I asked on another video this may be a stupid question but could you extend the range of your transmitter by attaching antenna to something like say a balloon or a kite or maybe even a pole.. something that could go up pretty high to extend the range?
yes, that would absolutely be a possibility. if you need the range for RF. lately, we're focusing mostly on full autonomy, which is even better for most applications, because the aircraft no longer needs to be in range to perform it's mission. There are circumstances which would require operator input, such as for certain types of decision making, but mostly, it can be eliminated, or compensated for my flying more auto missions, which costs almost nothing, and requires no operator for the majority of the flight.
@@FPVREVIEWS basically autopilot very interesting but what application would you use that for I can see for like deliveries/geography or whatever, but just for hobbyist based applications as in having fun lol it would be exciting to know your RC can fly itself back and forth but that would take the fun out of it after a while. I would like to see how high I could get without the use of drugs lol But seriously I would just like to see how I could get and take photos Or just say I did it You know what would be cool to build your own V2 but instead of going fast go real slow so slow that they won't be able to shoot you down because their rockets are too fast hahaha
@@earlyculyer4103 Even with the autonomous systems, you can take various degrees of control, including full manual, and have that RX failsafe option. so it all depends at that point, what is the range of your control, and video systems. fun stuff. I hope nobody shoots at my planes. they are a lot of work to build, and not cheap.. :)
Thanks 4 yr quick answer..here in Iraq we suffer high temp. weather since the end of April till the end of September..as u know temp. decreases about 6.5C each 1000meter higher..so in June ,July ,Augest & Sep. temp. at surface is 55-45C ...& that causes many electrical failure in the uavs..even the US troops got problems in using the RQ11 Raven ..as i read..any how i`m thinking of puchasing one..
+Jörn Beyse the original design spec was for 20 000 minimum, and to carry a full size DSLR to 10 000 and keep it there for 1 hr. or similar atmospheric sampling payload. i have not fully tested, but i believe both are achievable with the standard airplane.
+victor chakmakian if you have a HAM license you can fly almost wherever you like, although you should make aware any near airports of your flight, and have reflective antennas that make you stand out on radars. gay isn't it.
So just out of curiosity, how did you guys get up that high without any issues with the FAA? Did you file for a wavier/ COA or are you guys located out if the United States?
We're outside the US. Actually laws in US have changed, and you can get a commercial license now. The FAA finally got reasonable, but seems to be favoring commercial operators, of course. Typical gov. favoring special interest, and industry over citizens, but whatever. at least you'll be able to get a job designing, repairing, or flying them now!
the flight was made before many of the regs. we did check air traffic routes, and it was done in a country with very little air traffic. we also have an aviation handheld radio with the freq for the local airport.
I love your tail cam, landscape looks so great with this layout view.
4:52 that's a very good landing!
It's always a pleasure to watch your videos :)
Epic until the end!
Million of thumbs up and have a great week
cameras can be added to the wingtips as well. making eh gemini a pusher would put the props in turbulent air, and cause vibrations, but would work. similar to the piaggio avanti aircraft, they have unique noise profile, if you have ever heard one. that noise is the pressure differential from the wing hitting the props. i don't consider it a good thing, but it could be done.
i know that sound!! i fell in love with it's design, a few occasionally fly out of my airport where i work. i thought the noise was caused by the exhaust hitting the props.
it would fly the furthest at a relatively high altitude, without descending, because the air is thinner, and travel through it is more efficient.
This is the strategy behind commercial air flights, and the reason they expend extra fuel to get to their cruising altitude.
at sea level, the theoretical max distance is 120 km, with the 3kg battery pack, in stock configuration.
I love the high altitude footage, very peaceful looking.
I feel like I'm flying, this is awesome!
I really like watching these kind of videos. I use fly weight shift ultralight trikes, but I can't afford it anymore. So this is the next best thing. I disabled & was wonder how much a basic setup like yours would cost. I would really like to purchase to purchase a glider, & perhaps make it solar powered to help make the battery life longer.
So much freedom, The view is beautiful.
I'm baffled. Good job!
That was gorgeous Mr. Webb!
Would be great if you could put the telemetry on screen.... :-)
Martin coming soon on our other channel. see the description.
FPVREVIEWS can something similar be build with 100000s of km of range with the help of satellite
Has to be the smoothest flying fpv going. It's manners in the air and on ground are unsurpassed
glad to know you're still flying kevin costner
Random?
Cool camera setup with gimbal in the front!
Simply Incredible!
(Also anyone else think of Liza when the music came a couple of minutes in?)
We just published a video on how to make the Battery, for those who have been asking!
Nice flight! If you are planning to fly with no power on a regular basis, I recommend you look to set the speed controllers up to brake the motors and stop the props freewheeling. This would reduce the drag significantly.
yes, you are absolutely correct, but if you notice, I actually put the plane in a slight dive, to bleed off altitude, as a glide for that height could take over an hour. so i actually wanted the extra drag. you could get a longer flight time with the brake on for sure.
it does not reduce the drag. Also see my reply to the dude further down asking the same. I can prove it on paper if you like physics
Any airspace infringements?
could you explain it to me? I believe you but I would like an explanation.
My answer wasn't entirely right,i had forgotten about parasitic drag on a freewheeling prop. The answer is,for a given prop with a given pitch and given length, whether or not one should leave it freewheeling depends on the gliding speed. Here is a paper with test data i found: www.peter2000.co.uk/aviation/misc/prop.pdf
Anyway a collapsing prop is the best solution :)
great video man best setup ive seen yet
Very Cool. You said the batteries recovered. Wondering if when you shut the motors down, the windmilling props charge the batteries? Cheers.
awesome flight guys
This plane will never stop impressing me. I wish that I got this instead of the skyhunter, but maybe Ill buy this next time. You are so high and the scenery looks so different than in America. In what country do you live, because it is so beautiful there.
+daniel perkins Mexico. thanks for the compliments. it's nice weaterh here, but not worth the trouble. living here is not easy. better off in U.S. overall.
+fpvreviews you live in Mexico nice! ensenada? im from mexico city just order the plans to get building and flying!
Wow what an awesome aircraft! I like that's its the controls are kept simple, as ailerons are just not necessary for an airplane built for this purpose.
Great camera shots!
Very impressive. Sadly here in the US we won't be able to do anything like that now with the new FAA regulations.
+Barrett Powell The FAA is a rouge agency, acting directly agains it's congressional mandate. fly safe. you're not a real threat. don't let them brainwash you.
+FPVREVIEWS Unfortunately as a full scale pilot also I'm already under their jurisdiction.
+Barrett Powell well, then you know just how much they have damaged aviation. Funny that it's the purpose of the FAA to promote aviation.
I cant believe everyone went along and registered there model aircraft. Now they have funds to create more authority. Just wait. Ten years to register it will be thousand dollars and have to pay yearly taxes on our drones, force us to get a licence insurance.
Really nice video man keep up the good work
That's pretty incredible! Great aerial view and I like the design of the plane. I see that this video is quite old. Are you guys still around and flying?
yes, have been in Africa lately working on a DEV project, but back home now, and going to be back making videos soon. sorry for the delay.
FPVREVIEWS no need to apologize for any delay. I only commented 10 minutes ago lol. So youve been in Africa....I bet that was exciting! I'm going to sub to your channel and I'll be checking out some of your other videos. I've recently gotten into semi long range fpv.
welcome to the channel.
here is the latest video from Africa.
ua-cam.com/video/-rl8nJTHrzg/v-deo.html
Using a stock Gemini V-2 kit built version for counting animals on a private animal park over there, and doing perimeter fence inspections.
Wooooow! You released the V2 now! What's the total fight time? I see your descend took about 40 minutes and you were able to recharge the batteries! Amazing!
Hedio Trevisan flight time is 4+ hrs. see the last video before this for the endurance testing.
Nice shots from altitude.
Awesome flight, great video and music!
very cool video guys! what video system did you use for the FPV and what long range control systems? this is impressive!
Any thoughts on putting the newer super-thin and light solar cells on the upper wing surfaces? There are single engine planes already on solar with sustaining battery life- they never run out. You could at least significantly increase duration this way...
What type of onboard oxygen system did you use to keep the pilot from passing out?
Oh, never mind, you probably had a pressurized pilot compartment to handle all that pressure change. :)
If you call sea-level a pressurized pilot compartment then yea
Awesome I may try this system out. Currently running uhf fpv system our with GPS autopilot safety feature. I need to make a video soon. I fly this plane 24 miles out before turning around. Usually have to turn around due to battery flight time. My secret is I climb to the top of a fire tower locally that is 150ft high on top of a giant high elevation hill that sits about 200 feet above the rest of the area. I set up my equipment there. I've been testing the plane design to see how much weight it can carry efficiently without requiring so much more power. Reason im testing is because I may switch to diesel engines. The plane so far can carry 15lbs efficiently and 25lbs at max but it requires alot more throttle so I say 15lbs is perfect. That equals to almost 3 gallons of diesel. I may be able to reach much further out in range this way. What do you think?
Kick ass flight guys! keep it up! I cant wait to see what kind of SAR work can be done with this bad boy!~
This was a wonderful video!
Brilliant ideas...can the avionics autopilot ,tvtrans.engines ,esc,batteries etc.. defeat high weather tempreture of more than 40 centigrades working for more than 4hrs on 1000meters altitude ?
+Salih Mehdi temperatures get less at higher altitudes, not more. so, no problem, just need insulation for extreme altitudes, and extreme low temperatures. At these altitudes, it is not a problem. it would be interesting to add an outside air temperature sensor to the plane, however. also a barometric sensor, so sense density altitude. alternately, airspeed could be compared with average groundspeed.
Incredible work. Sorry if you mentioned this, but do you have to register this in any way?
Awesome! What kind of radio did you use? Any amplification device?
Those are some funky intermissions...
great job! would love to know more about the downlink equipment
thats bad ass two thumbs up if i could, absolutely amazing footage and build
Excellent. Very nice setup
NIce!. You need flaps and speed brake to expedite the decent
I can't wait to do that with my 2.4 m ranger.
Just saving up for a couple more parts
I've seen two approaches to high altitude, using lift and climbing relativily slow, and climbing very fast. still not sure which is the best, but the fast method does not need a very big plane.. ha ha. sounds like your ranger would be somewhere in the middle. Looking forward to seeing it.
What equip are you running?
More than creativity .... wonderful
soooo what about doing a nose dive over the ocean then pulling up to test the strength of the wing?
this plane can be a spoting plane for arty and correct firing for them + what the range of this plane ? pretty nice plane you made there and sorry for my bad english
Very nice! What city are you in?
Enjoyed the flight, just a question, was there any concern of large aircraft in the area?
no concern. The area which we fly is a bit of a dead zone for air traffic between 100ft AGL and 20,000. we do monitor carefully for low level traffic. it's near an airport. this was also made before the regulations in our country.
thats amazing. How much did it cost to build.
Nice work, when is the arf version on sale.
Nice flight !
wow thats some altitude! makes the 120m limit in the uk seem rather paltry by comparison :)
On next flight can you mount one camera with no-distortion lens? Seems every go-pro or any other camera has wide-angle or fish-eye lens. Curious what horizon looks like in high altitude. Amazing work.
+Mark K from this altitude, no curvature is visible, if that's what you mean. i'll consider using some different settings on the go pro, as they have narrow field of view setting, which makes them look like a normal camera. thanks for your input!
+FPVREVIEWS Amazing what you can build and how high you can fly it. "... from this altitude, no curvature is visible..." Now I'm confused more than ever before. Thank you for your response.
+Mark K airliners fly about 2-3 times that high, and from them, you can't see the curvature, really very well. i think it's not clearly visible until something like 40-50 thousand feet, but i could be mistaken.
i'm sure google or wiki would have some info.
+FPVREVIEWS here is something i found from an airline pilot: "From a friend who was a military pilot, and from sources such as the many books I have read on the SR-71 and U-2 it can be said that this doesn't appear until you get up to 55K-60K feet........
The highest I have been is 41K on a 777 and I couldn't see anything but a flat horizon."
sounds like we need a better airplane, i will start designing it... LOL
+FPVREVIEWS Long story short friend of mine (deep thinker and thinks way too much) told me we live on FLAT EARTH. I laughed in his face and said few things. He challenged me to prove him wrong and I can't use NASA pics or any other pics using wide-angle or fish-eye lens. He said I will never see curvature with my own eyes because there is none. With Earth's size and mathematical formula we should see curvature when looking at horizon from high altitude. At 4k to 5k feet high we should see curvature and 20k feet high curvature should be obvious. More I research this more questions I have. WTF.
after watching this video again, I'm kinda surprised that you don't have the brake enabled on the esc's. Wouldn't enabling the esc brake, therefore stopping the propellers from spinning, reduce drag from the freewheeling props?
Nope,as the blades spin freely the drag is reduced compared to being still,u can figure this out considering when spinning,from the blade's frame of reference,the air is moving at angle closer to the chord of the blade. If you can minimize internal friction of the shaft this rotation speed increases to the point of 0 drag and you can have a glider that doesn't need to collapse its prop.
frizstyler I never thought about it that way. Thanks for that!
Yes, stopping the props would make it glide better. You can test by trying to autorotate your heli with and without the blades spinning and see which one comes down faster.
Steve C hmmm, I'm not real interested in testing that theory with my helicopters lol
during autorotation the blades already have built in inertiawhich can produce lift when you turn up the pitch. however my answer isn't completely right. parasitic drag plays its role for a freewheeling propeller. i found a paper with test data.: www.peter2000.co.uk/aviation/misc/prop.pdf
I believe this Gemini could be flown with solar panels like the Solar Impulse. It would be the first RC to do so.
Quick question:
Why dont just dive down like a kamikaze for descending quicker.
because you could stall
@@comedicsketches ever heard of an accelerated stall?
very nice set up
Beauty of the earth, I agreed with you mate.
hi ankurgokhale, have you become a flat earther yet? If not I suggest viewing the 13 part series _what on earth happened_ in my about to learn how the earth is not a globe
Good flight. I see, landed with the engine running? Still there was to reserve batteries? Whether rotating on stream?
+OLEG69M there was still about 15% of the battery remaining. I have the ESC's set up to free-wheel, or turn freely, as it makes more drag, which helps to descend, and helps a little to flatten the glide slope for landing.
+FPVREVIEWS Understand. The high speed without the engine running?
+OLEG69M the climb is with the motors running. the glide is with the motors not running. I shut them off, to keep a reserve of electrical power, in case i have to abort a landing, divert, or need power to get back to the landing zone.
+FPVREVIEWS A large load on the wing?
+OLEG69M not really, still several pounds under gross weight.
This is a real one. Great video !!!
So cool.. nice view from the sky
Wouldn't the air there be incredibly cold and take a toll on the battery and control surface? I've seen high altitude pilots struggle with frozen servos before.
This is pretty impressive, but how do you know if you're remaining outside CAS?
Also, you experienced a classic inversion - I've flown in quite a few (full size plane) and the transition from the bottom layer to the top is quite remarkable. The turbulence just gets switched off!
+cjm2005 we are outside the US, and at the time of filming, there were absolutely no rules regarding RC aircraft, etc. Here, the most dangerous place to fly is low over the designated model field. not much air traffic here anyways.
yes, it's very neat to be able to get above the local weather. many times, i have noticed a slightly turbulent layer, about every 1000 to 2000 ft. and the wind direction seems to change and strength also, with every layer.
You need to do a bit of study on meteorology mate, it's absolutely fascinating, even more so when you see it in action in real life observations.
en.wikipedia.org/wiki/Inversion_(meteorology)
Also, due to the Coriolis effect and surface friction the wind direction and strength changes as you ascend - the general rule is 'increased (in strength) and veered (to the right) going up, slack (less strength) and back (to the left) coming down.
You can access spot wind charts & use the forecast winds to decide on a cruising altitude if you want to do a long distance flight :)
sorry, it says that it was piloted manually, but how is it possible that you re-pilot this plane manually at such long distances?
Excellent video. Great job.
wow, amazing. battery specifications? do you remember the climb rate?
So beautiful!
Folding props or ESC brake would really help your glides back down.
yes, it would help, but for this flight, we were actually in a slight dive, and trying to bleed off kinetic energy to get back down more quickly. it would be nice to have options, though.
Did you or can you use Autopilot to return ?
Hi there how did you get the transmitter and receiver very super long range is 13,000 ft is for your plane to control it to go to over the clouds but more high can you give a links please and receiver box and video transmitter is but the video transmitter on your plane but do you need power on your plane receiver or battery connected and power to video transmitter is but how did you get all hobby parts for your plane and connect two brushless motors on your plane can you give a links please
Folding props will eliminate the remaining residual chatter caused by turbulence in glide mode
True, would reduce drag too and allow for longer flight times when climbing to altitude. For this flight, we actually welcomed the props spinning freely, and their extra drag, as we slightly held the nose down for most of the descent to get down quicker. there is also electronic braking for the props which will reduce drag and vibrations slightly, but we would rather have the drag for fast descents. the nacelles would have to be redesigned to use folding props, and probably move the motors further away from the wings to allow for rear-ward prop clearance when folded. Most flights have the motor running for almost the entire flight, up to 4+hours, and have no need to fold props. Would be interesting as an option though..
Nice video!!!!! Keep fpv flying. Where can i buy the plans? Do you have them in electronic version for cnc use?
Thanks
+Bill Bonovas Thanks for your interest! you should find all the info you need including plans info at out website: www.bearospaceindustries.com/store.html
And what kind speed controller did you use for your plane gets more strong give the brushless spins super faster and what kind propellers did you use can you give me a links please
So where i can buy those EZUHF rx and TX can you give me link of websites please but do you need taranis radio connects to EZUHF rx and TX and they needs to update it to use long range for your plane please
Hi FPV review, I really like the Gemini version 2 and have looked at the available blue print plans to build. I have builded aircraft from a kit. Just not sure I can build the Gemini from your plans . Do not know if I have enough know how to build. wish I had hands on or a very good video to go on, thank you. what do you suggest.
+Coolwater Hubby watch the build video,a nd maybe it will give you a better idea if you want to take on the project. for 15 dollars, you can get the plans, and at the very least, you will have them for later when you feel confident enough.
here is slink to the build video:
ua-cam.com/video/8DMduHD4pFk/v-deo.html
let me know if yo have questions along the way. i keep a photo archive i can send by email if you need.
cheers! Spike
is here trinity headtracker or diy arduino tracker?
But how did you get the antenna gives you 13,000 ft like very very super loong range like you can go more
High but what kind fpv video transmitter did you use is and but how did you get the controller for your camera so you can move the camera any where on your plane from your rc plane transmitter is can you give me the links please
Nice man! Beautiful video))
great flight
Graceful bird. Nice flight!
But what kind brushless motor did you use can you give a links please
Hey...Great Video!
What´s the cost of the laser cut´s ?
+Morten Holck send me an email at fpvreviews@gmail.com and i'lll send you the complete info package for the kit.
thanks for your interest.
is there such a thing as a small radar setup for air traffic? be nice to have that on the osd.
Um, no. at the relative speeds that our uav's travel, it would be fairly useless anyway, as we are not fast enough to get out of the way of all but the slowest manned aircraft.
I think the key will be to make an aircraft which can climb vertically or descend vertically at a very high rate of climb, and in a efficient manner, also controlled, and safe. a hard problem, but one that tilt rotors and reversible/variable pitch thrust can solve.
much better to use a system of shared V2V communication to share position and heading/speed date, i think.
the automotive industry will probably provide a working solution there.
it'll all come together, but will take some time, and there will be ranting and raving in the meantime. also bans, and arrests. basically, lots of hysteria. Sad.
FPVREVIEWS. I would say the question still stands. And I want it, or at least a form awareness. To avoid each other or simply know there is a jet three miles out and five miles up. Especially, because we can't say we won't continually push our limits. There are apps on my phone that allow me to see commercial planes and where they are in the sky in live feed. Tapping into data already available, and/or uploading our own location actively or indicating it passively. As I push the limits, I feel at least being able to transmit out something other aircraft can pick up would be easiest. Seems like if commercial aircraft tapped into our video out they could avoid us at least. Using a simple algorithm of the signal strength a manned aircraft can workout location, direction and speed. I Just have to imagine it is cheaper to pay engineers of the F35 and they have worked out how to avoid all objects in the sky vs the cost of repair or crash. I also hope their method of avoid is not to shoot us down. Ha ha
transponders are the current way of keeping traffic separation. as well as ADSB.
This si a technical challenge, but a solvable one, and V2V communication, as i mentioned already exists, at least in working prototypes. Hard part about any of this tech is getting the government to approve it. V2V will be the first as it will make the roads safer pretty much immediately, so it's hard, and unpopular for the gov. to drag their feet on the implementation.
FPVREVIEWS. I will look into that tech. Certainly curious about size and weight possibilities. A lot of work for good reasons. yes, to be continued/stretched out.
Does it have landing and navigation lights?
OMG GREAT VIDEO!
Hi, total noob here. How much did you pay for this kit? Any insurance as well?
I asked on another video this may be a stupid question but could you extend the range of your transmitter by attaching antenna to something like say a balloon or a kite or maybe even a pole.. something that could go up pretty high to extend the range?
yes, that would absolutely be a possibility. if you need the range for RF. lately, we're focusing mostly on full autonomy, which is even better for most applications, because the aircraft no longer needs to be in range to perform it's mission. There are circumstances which would require operator input, such as for certain types of decision making, but mostly, it can be eliminated, or compensated for my flying more auto missions, which costs almost nothing, and requires no operator for the majority of the flight.
@@FPVREVIEWS basically autopilot very interesting but what application would you use that for I can see for like deliveries/geography or whatever, but just for hobbyist based applications as in having fun lol it would be exciting to know your RC can fly itself back and forth but that would take the fun out of it after a while. I would like to see how high I could get without the use of drugs lol But seriously I would just like to see how I could get and take photos
Or just say I did it You know what would be cool to build your own V2 but instead of going fast go real slow so slow that they won't be able to shoot you down because their rockets are too fast hahaha
@@earlyculyer4103 Even with the autonomous systems, you can take various degrees of control, including full manual, and have that RX failsafe option. so it all depends at that point, what is the range of your control, and video systems. fun stuff. I hope nobody shoots at my planes. they are a lot of work to build, and not cheap.. :)
can anyone tell me what camera he was using
Thanks 4 yr quick answer..here in Iraq we suffer high temp. weather since the end of April till the end of September..as u know temp. decreases about 6.5C each 1000meter higher..so in June ,July ,Augest & Sep. temp. at surface is 55-45C ...& that causes many electrical failure in the uavs..even the US troops got problems in using the RQ11 Raven ..as i read..any how i`m thinking of puchasing one..
very nice. how high you want to go? 20000ft?
+Jörn Beyse the original design spec was for 20 000 minimum, and to carry a full size DSLR to 10 000 and keep it there for 1 hr. or similar atmospheric sampling payload. i have not fully tested, but i believe both are achievable with the standard airplane.
With this exact configuration and ground units, what would be the price
very cool plane..i want one now
I like how you said now
Simply one word: EPIC!!!!
Question. why is it legal to fly RC airplanes to those altitudes but quads are restricted to 4oo ft.
+victor chakmakian if you have a HAM license you can fly almost wherever you like, although you should make aware any near airports of your flight, and have reflective antennas that make you stand out on radars.
gay isn't it.
So just out of curiosity, how did you guys get up that high without any issues with the FAA? Did you file for a wavier/ COA or are you guys located out if the United States?
We're outside the US. Actually laws in US have changed, and you can get a commercial license now. The FAA finally got reasonable, but seems to be favoring commercial operators, of course. Typical gov. favoring special interest, and industry over citizens, but whatever. at least you'll be able to get a job designing, repairing, or flying them now!
Wow!
I know this is an older vid, but...
MAN!- Look at those views!
Sooo I realize I’m crazy late to this video but I have a question. Did you guys have to file a flight plan because of how high you guys were?
the flight was made before many of the regs. we did check air traffic routes, and it was done in a country with very little air traffic. we also have an aviation handheld radio with the freq for the local airport.
What's your specs and what outputs settings did you use?
Hey, what are you up to?