Jonas actually makes the details of landing gear fabrication fun to watch, and Jonas is always funny. So watch it and you may find yourself asking for a welding kit for Christmas.
Jonas, already thought this with the previous video. Why don't you use a slightly thicker polycarbonate windscreen, bent in a good U shape, as an integral part of the construction. It would require a bit of engineering on the attachment/mating surfaces of the frame, but it would be even stronger than what you have now and you'd have no visual blocking.
Jonas, Just catching up on this. Put some bump rubbers in the shocks to control the overall travel and to make the spring rate progressive. We use them on the race cars all the time. They make them in different densities to control the squish.
@@JonasMarcinko I like Penske bump rubbers even though they are a bit more expensive. They have a nice graph of force to displacement on their website. You can figure out the amount of weight that will be placed on the bump rubbers from the (weight on the two wheels) / 2 * ratio of your rocker arm suspension. In the case of a hard landing these should protect your gear, shock mounts and shocks from being destroyed. You can cut them and play with the length of them to get them 100% right for your use. They also have shims they make that you can slip in below them to change the overall length. I think it would make a difference, but I am much more of a car person. www.penskeshocks.com/product/bump-rubber/
you guys and your migs. you need to stress relieve all welds with a rose bud on a gas torch. TIG or use a gas rig for welds. Put a secondary tube in your main strut support for some spring. If you are borrowing from Just, put a super stol wing on it. Works crazy good but sacrifices top end for low speed lift like nothing else, and their landing gear cant be beat. What brakes you putting on it ?
Some of you guys need to get out of the stone age! www.harrisproductsgroup.com/en/Expert-Advice/tech-tips/welding-4130-chrome-moly.aspx I have not seen a kit aircraft fuselage that is tig welded. I prefer it myself but the old wives tale of not mig welding 4130 was put to rest 20 years ago.
@@julioshaheen8386 The welding process inherent in stick or mig puts ferocious stresses in the parts as they cool. That's a stone age fact. I did not say you can't mig. I said you need to stress relieve. Learn to weld, learn the different processes and then spout off. Aircraft are not tinker toys.
Julio Shaheen you never a kit plane fuselage that wasn't Mig welded?? Open your eyes learn your facts and quote from an aviation approved authority. Torch or TIG are the only approved processes buy both the FAA and the EAA as well as other governing bodies throughout the world.
I agree with Jonathan, while an aircraft can be mig welded, it's not weekend warrior safe. While welding the fuse with a mig is something you could probably get away with, I wouldn't dare mig weld gear or wing attach points or struts attach points.
Does anyone beside me think there needs to be some sort of truss structure inboard on the gear leg. As is I think there's a large bending monument being applied right at the pivot , where it will eventually bend or fail.
From simple mechanical point of view, he replaced stretching/compressing forces (which tubes are very strong for) with bending force (not a strong suit of the round tubes) and a huge lever to boot.
It is the coolest thing to see the excitement and dedication combined with a super desire thus interest in building airplanes. Being from enthusiasts from as far back as the 1930s biplanes, I intend to build a plane not intended for beginners because I have the blueprints and permission yet you got your own ideas!
Butt welding pipes together is very weak in shear loading. The rear bar of the gear leg needs some sort of gusset near the rear mount to bridge that butt weld or tie the front and back bars together near the hinges. Overall looks great! Giving me ideas for future build.
Would highly recommend checking those 3/8" pivot bolts after a few flights or a hard landing for any evidence of bending in the bolt. It's unlikely to fail suddenly so probably not worth a redesign. Would definitely keep an eye on it though. In a different context, but a very similar load case and pivot design (as shown at 11:00), I found the bolt would suffer a bending failure after a surprisingly low number of cycles. Love the project, keep the updates coming!
My cub has safety cables on the landing gear- suppose to keep the prop out of the dirt if the gear fails. Could save a costly tear down. Also my gear has a secondary "strut" running front to back on the gear stiffening up the whole structure. A sharp builder could study the geometry and identify weak points. Exciting build- I can see you do very good work!
The 3/8 Pivot bolt should have been 1/2" Also the Brackets in My opinion should have been twice as thick with a sleeve between them. Keep up the good work Greg CFI ME. Are you using Chrome Molly tubing? Great overall Design
Hey, I've evaluated structures like yours many times for the Air Force. If you need to know the structural stresses and factory of safety against yield for whatever torsion and forces you're concerned about, I'd do it (in exchange for a ride when it's done). Should take me an afternoon. I'm using RISA and COMSOL. The members in compression will need shorter spans to resist buckling, and the ones in tension will need the strongest welds.
Hunts: Hey, you're going to take all of the fun out of the build! Just kidding, that is an offer that Jonas should strongly consider. "Should take me an afternoon," that rings of no BS confidence. Jonas, Hunts sounds like he knows what the hell he's talking about! That single gear leg is my main concern, the bending moment on it. I don't have your technical expertise, but I do have 40 plus years of bending and breaking various landing gear experience, and i can see that maybe being an issue, it'd be interesting to get actual numbers on it.
Jonas I was wondering if your pivot points on your shock setup should be bushings for wear? Just looking at the wearing of two metal surfaces. Grease fittings like in bronze bushings. An ounce of preventative measures for a long lasting pivotal area. What do you think Jonas?
I forgot to ask if you plan to add any bracing to the lower gear to account for any side loads and prevent buckling the gear? Depending on how you tie it in it could help reduce and/or eliminate the bending at the hinge line at the forward gear tube.
Jonas take it easy on your body! It will catch up with you. Wicks is a great company with wonderful customer service. I lived with in 25 miles of Highland and would drive to personally pick up my order. Highland has some very good restaurants which made it a fun trip.
Will you be putting the coils back on the shocks? With those, the springs are what take the load and the shock just really keeps the spring from being, well, springy. I come from the automotive racing world and only dabble in aviation, but I would say the coilover setup would be the best to prevent a roll over and be able to handle any off airport work. Love the build, definitely got me thinking about building and stepping outside of the comfort of my C172!
@@imontime77 That's a cabane v, the basic standard of the time when bungee straps were the standard for landing gear. His design is basically transferring the landing into compression rather than tension.
I love your landing gear design in keeping the shocks and coils inboard to reduce aero drag. It also allows you to install a sway bar that I think you will need for nasty turbulent crosswind landings. I'm a little surprised you don't have the front gears angled a little more forward to reduce the possibility of a nose-over. Your geometry should allow. I wonder why Trent's KitFox, even with the new heavier engine (100 lbs. plus) allows him to land with the tires locked without a nose-over and your KitFox did kiss the ground. Also, I would contact one of your engineer buddies (or get a load management program) to run some quick calculations on the stress and shear on your landing gear bolts. All is needed is the weight of your plane. Your 3/8 in bolt seem light at first thought. Thanks for your vlogs, they are fantastic.
I had a similar thought as Jonas was describing the suspension struts and the process he had followed. My first thought, as he described stepping up to the 3/8" bolt was that the whole weight on that side of the gear, times the impact force, times the length of the lever... Mmmm. A little extraneous calculation might be in order. It might be a good time to pull out that "Good Ol' Slide Rule!" I have a couple very good (OLD) Pickets in my desk drawer. I know the batteries are still good! I'd be glad to loan you one. ; ^)
I am a lot more concern about the pipe breaking (flexing) near the bolt just after the reinforcement than the bolt itself. Hopefully the tests will tell.
@@MrGaryGG48 Come on ... Really. Jonas is a young buck. He never heard of a slide rule. And Pickets... isn't that part of a fence? LOL You gave me an idea. I'm going to send Jonas a Picket slide rule. Think he will know what it's for? After watching the video again, I'm concerned about other mounting points too. Oh well.
@@jrs9144 You're right John, he is a "young buck" but he's a pretty creative one. I'd just hate to see him and his girlfriend get hurt if mounting points or under-sized bolts or anything else, for that matter, failed. I've seen the results of a small plane getting slammed into the runway due to a unexpected down-draft. It collapsed the right side gear, put the wing tip into the ground and thoroughly messed up the airplane. My wife's friend was the student pilot doing one of her solo flights which became her last fight. She decided about the time that the wing tip bit the dust, that she just didn't want do that anymore. She walked away but it was slowly and a bit unevenly.
Hey man I love your Channel! I am pretty new to the whole aviation thing but I love the fabrication side of it. its awesome to see a plane be built by someone. I've been welding and fabricating things for several years now and never considered building a plane. Maybe I'll put it on my bucket list. Keep up the good work and keep showing us the fab side of it! I love it!
Didn't you also help record some of the footage for the original rage gear? I believe we met when John and I visited Joel and did the first flight test of the original rage gear. The first plane you highlighted in Johns builds was The Raven. It had a very unique set of controls that effectively gave it flaperons. The Hillcat is the latest though much of his time is taken up with building his bush Gear and Rage Suspension. I'm his nephew and worked in his shop during the first several iterations of the rage gear.
@@JonasMarcinko I thought I recognized you. Just found your videos out of the blue a few days ago because it hit my randon youtube feed and then i heard you mention John. Good job on the plane, if John speaks even mildly excited about your work then you know you are doing great.
Jonas You should look at what formula 1 and indy cars run on the way they use cams for getting lots of movement withe the shock barely moving it make the shock last longer i that would work great on your plane. I am working on planning it on our dirt latemodel racecar , similarly to what you ate doing .look up dirt latemodels it will give you some more ideals too. Check coilovers for race car they are cheaper and in some cases better.
Just came across your channel and love it. I started flying in the early 80's, however, the costs escalated so I stopped BUT I never lost the love of flying. Now I fly a drone and have truly enjoyed watching your videos, brings back the rush of flying. Wish I knew about the Kitfox in the 80's and 90's. Keep up the good flying and keep posting. Thank you....
Those Edge performance Epex engines are amazing. 300hp is awesome yet I think I saw a dyno run on his Instagram of almost 397hp. What are you thinking for wheels and brakes? The Beringer dual caliper setup is gorgeous and seems to perform amazingly well.
Oh yea. Go with that Yammer’hammer. Love the sound of that 10,000 RPM kicking butt. I will finally get to see it in person here in Texas in March. Steve is on the schedule. Hope you can make it out to.
With that geometry, the gear legs are going to transfer more energy directly to the frame rather than through the shocks at full droop. The camber on a decent size bush tire at full droop will cause the tires themselves to want to push inward instead of outward on touchdown. This effect will be magnified if you land on one wheel in a crosswind. Expect your gear legs to bend/crack, and if you truss the legs you'll transfer that problem to the frame instead. Toe out is a bandaid fix for tire scrub and won't help the issue...especially when you consider how negatively it affect handling on the ground. My advice is to extend and truss the legs, adjust the shock mounting point so the max droop is less and compression travel is extended, and make up for the loss in prop clearance by using a larger tire size. Gear failure is the last thing you want in a bush plane.
Some very good points. I completely understand and knew this while building them. Hopefully they work! I’m anticipating that the tire will take the initial impact and then the gear will fallow! Maybe it won’t be enough though.
@@JonasMarcinko I sure hope so man, you put a lot of work into it. Ultimately, the tire size and toe out will be the two factors to concentrate on. Might be a good excuse to invest in a high speed cam and mount it on the belly to see what happens on touchdown.
Looks like a fun build. However, I am concerned with a few design details of your landing gear. You will have a huge bending moment at the hinge point of the forward gear tube and at max load. I recommend you perform a few bending moment calculations at various loading conditions. A second issue I see is the large gap between the gear and fuselage hinge tabs. Even though bushings are installed to reduce bearing stress, the large gap introduces bolt bending and reduces the capability of the bolt. You don’t want a bolt in bending, the bolt should be in shear and bearing for this application.
What do you think about BERRINGER's double pivot anti-Ground-loop tail wheel. It seems to me to be an advantage to any tail-dragger. I don't have any practical experience about it - I am just a passionate armchair engineer.
I’m interested to see this gear design work. I’d mentally designed pretty much the same idea for the rockhopper but hadn’t committed to it just yet. I may “future proof” that area of the fuse so I can run a traditional cub style gear or clean it up later.
Hi Jonas, nice work and nice videos! I enjoy your videos as much as your content. Your welding look above average. "It will fly" is not the answer I would want to hear.When it comes to aviation, perfection is reasonable.
Thanks for the reply. If you have time look up a small landing strip jumper hills CO 29 Parachute Colorado. Drop in for a visit sometime after the snow is gone would like to check out your KitFox and say Hi.
I know this is late and someone may have said it already but....a spring compressor (like for automotive struts) would go a long way for your gut when you’re taking those springs off.
I wonder at the very small diameter of the tubing in use?? A thin-wall, larger diameter tubing is much more rigid, per weight, no? Also, if you are suing carbon fibre in places, could you not make some of those sections in a monocoque fashion, or stressed-skin?? Just asking?
I'm not a pilot, but would love to be so subscribed because love your videos. In watching I noticed we may be from the same small town, is that Jensen's Grove next to you?
make sure you get some good quality sound proofing, it can help a-lot with vibration as well, also it makes longer flights more comfortable because there is less noise. keep up the good work, love your metal work
Haven't been in the upside down club, but have done an engine out into a strip mine, and took out the top two strands of a barb wire fence, ripping off one wheel, and bellied it into the ground. Any landing you can walk away from.......
Turbo Tastic based on all of Mike's videos I've seen plus those of others, where they may have featured a clip of them helping, I would be of the humble opinion that Mike does most of the work himself with a little help from his friends when two hands ain't enough.
@@f2air You may be right, he enjoys doing the work, but setting up cameras to film is usually more work than the work itself, and I'm pretty sure he has a full time hired help camera man. Still impressive what they all do, just got tired of watching Mike Patey, if you throw enough money at things you can build anything; he bought his wife a $200,000+ plane for her birthday, so that explains a lot too. What isn't explained is how he ran a 200+ deck building company when in high school.. he must have walked into a lucky deal, I don't know anyone that needs that many decks, even for a team of 2, finding people that need decks would be difficult.
@@f2air but you'll accuse me begrudging them? I'm just saying they don't seem particularly bright, he's no Tony Stark.. anyone that builds a 6 wheeled Jeep is not a person that I would rank high up the totem pole of intelligence. Everyone starts with $0, it is called childbirth. Then people fall into big contracts, just like Gary Johnson starting his handyman company.. with a huge government contract (stolen money, taxes are theft). So who helped them, they got zero help you are saying? They had $0, so they were orphans on the street, since childbirth? that's $0. I would love to hear the whole story, if you have a link to details and facts.
Looking Great Jonas, Not much goes to plan hey? :) your must have like 100 hours in that gear but its totally payed off and its a one off , Your own design so that's really cool. Love the bench it will serve you well, Maybe you could Pop the Pilot Yak on there and give as tour of it :) When did you last fly it? Looking forward to the nest vid - The Hodge.
I really enjoy watching your videos, would like to see more detail on the DEFIANCE build. Has anyone installed an arctic cat Z1 1300 motor in a bush plane?
Jonas actually makes the details of landing gear fabrication fun to watch, and Jonas is always funny. So watch it and you may find yourself asking for a welding kit for Christmas.
Many of us can build stuff and watching you build stuff is cool, but more silvia smile will keep us all watching.
Jonas, already thought this with the previous video. Why don't you use a slightly thicker polycarbonate windscreen, bent in a good U shape, as an integral part of the construction. It would require a bit of engineering on the attachment/mating surfaces of the frame, but it would be even stronger than what you have now and you'd have no visual blocking.
Interesting idea. At this point I’ll keep it like it is. But I may think about this for a future airplane.
Jonas, Just catching up on this. Put some bump rubbers in the shocks to control the overall travel and to make the spring rate progressive. We use them on the race cars all the time. They make them in different densities to control the squish.
Excellent. I was thinking they make something like that. You have store recommendation?
@@JonasMarcinko I like Penske bump rubbers even though they are a bit more expensive. They have a nice graph of force to displacement on their website. You can figure out the amount of weight that will be placed on the bump rubbers from the (weight on the two wheels) / 2 * ratio of your rocker arm suspension. In the case of a hard landing these should protect your gear, shock mounts and shocks from being destroyed. You can cut them and play with the length of them to get them 100% right for your use. They also have shims they make that you can slip in below them to change the overall length. I think it would make a difference, but I am much more of a car person. www.penskeshocks.com/product/bump-rubber/
Can we see some of the CAD work and how you prototype this stuff? I’m so fascinated by that part of the process.
you guys and your migs. you need to stress relieve all welds with a rose bud on a gas torch. TIG or use a gas rig for welds. Put a secondary tube in your main strut support for some spring. If you are borrowing from Just, put a super stol wing on it. Works crazy good but sacrifices top end for low speed lift like nothing else, and their landing gear cant be beat. What brakes you putting on it ?
Some of you guys need to get out of the stone age! www.harrisproductsgroup.com/en/Expert-Advice/tech-tips/welding-4130-chrome-moly.aspx I have not seen a kit aircraft fuselage that is tig welded. I prefer it myself but the old wives tale of not mig welding 4130 was put to rest 20 years ago.
@@julioshaheen8386 The welding process inherent in stick or mig puts ferocious stresses in the parts as they cool. That's a stone age fact. I did not say you can't mig. I said you need to stress relieve. Learn to weld, learn the different processes and then spout off. Aircraft are not tinker toys.
Julio Shaheen you never a kit plane fuselage that wasn't Mig welded?? Open your eyes learn your facts and quote from an aviation approved authority. Torch or TIG are the only approved processes buy both the FAA and the EAA as well as other governing bodies throughout the world.
I agree with Jonathan, while an aircraft can be mig welded, it's not weekend warrior safe. While welding the fuse with a mig is something you could probably get away with, I wouldn't dare mig weld gear or wing attach points or struts attach points.
@@waynetokarz174 you can get approval to MIG. Just aircraft airframes are all MIG welded.
Does anyone beside me think there needs to be some sort of truss structure inboard on the gear leg. As is I think there's a large bending monument being applied right at the pivot , where it will eventually bend or fail.
If he could add a cross to the top of it, it would be very much like a super cub gear.
I think the whole assembly is a bit under built.
I think the same
From simple mechanical point of view, he replaced stretching/compressing forces (which tubes are very strong for) with bending force (not a strong suit of the round tubes) and a huge lever to boot.
It is the coolest thing to see the excitement and dedication combined with a super desire thus interest in building airplanes. Being from enthusiasts from as far back as the 1930s biplanes, I intend to build a plane not intended for beginners because I have the blueprints and permission yet you got your own ideas!
John’s shoutout on your CAD caught my eye, too. Not just a fly by night build but planned and well designed. Thanks for sharing 👍👍
I stumbled upon your channel, I never even thought about self built planes. Man I can't wait to see the progress on this.
Butt welding pipes together is very weak in shear loading. The rear bar of the gear leg needs some sort of gusset near the rear mount to bridge that butt weld or tie the front and back bars together near the hinges. Overall looks great! Giving me ideas for future build.
Would highly recommend checking those 3/8" pivot bolts after a few flights or a hard landing for any evidence of bending in the bolt. It's unlikely to fail suddenly so probably not worth a redesign. Would definitely keep an eye on it though.
In a different context, but a very similar load case and pivot design (as shown at 11:00), I found the bolt would suffer a bending failure after a surprisingly low number of cycles.
Love the project, keep the updates coming!
Very good choice on the on the shocks
My cub has safety cables on the landing gear- suppose to keep the prop out of the dirt if the gear fails. Could save a costly tear down. Also my gear has a secondary "strut" running front to back on the gear stiffening up the whole structure. A sharp builder could study the geometry and identify weak points. Exciting build- I can see you do very good work!
The 3/8 Pivot bolt should have been 1/2" Also the Brackets in My opinion should have been twice as thick with a sleeve between them.
Keep up the good work Greg CFI ME. Are you using Chrome Molly tubing? Great overall Design
Hey, I've evaluated structures like yours many times for the Air Force. If you need to know the structural stresses and factory of safety against yield for whatever torsion and forces you're concerned about, I'd do it (in exchange for a ride when it's done). Should take me an afternoon. I'm using RISA and COMSOL. The members in compression will need shorter spans to resist buckling, and the ones in tension will need the strongest welds.
Hunts: Hey, you're going to take all of the fun out of the build! Just kidding, that is an offer that Jonas should strongly consider. "Should take me an afternoon," that rings of no BS confidence. Jonas, Hunts sounds like he knows what the hell he's talking about! That single gear leg is my main concern, the bending moment on it. I don't have your technical expertise, but I do have 40 plus years of bending and breaking various landing gear experience, and i can see that maybe being an issue, it'd be interesting to get actual numbers on it.
Thanks Port! It's a lot of fun. I'd be happy to do it for any home builder! I really hope he takes me up on it.
Jonas I was wondering if your pivot points on your shock setup should be bushings for wear? Just looking at the wearing of two metal surfaces. Grease fittings like in bronze bushings. An ounce of preventative measures for a long lasting pivotal area. What do you think Jonas?
Any analysis done on the frame? Looks pretty eyeballed all around...
I forgot to ask if you plan to add any bracing to the lower gear to account for any side loads and prevent buckling the gear? Depending on how you tie it in it could help reduce and/or eliminate the bending at the hinge line at the forward gear tube.
Good morning. do you like miging over tiging your tubing? Definitely a lot easier if you run a pedal on Tig.
Jonas take it easy on your body! It will catch up with you.
Wicks is a great company with wonderful customer service. I lived with in 25 miles of Highland and would drive to personally pick up my order. Highland has some very good restaurants which made it a fun trip.
I’ll have to take trip there one of these days.
Jonas Marcinko there is an airport just outside Highland. Nice grass strip.
These build videos are great.
Does anyone watch Mike Patey as well?
I'd say we all do!!
Doesn't everyone??
Mark who, i mean mike who. cant tell them apart!
Everybody watches the Pateys - and Trent Palmer.
The thumbnail has some Rob Dahm vibes.... if you airplane guys are car guys as well:)
Will you be putting the coils back on the shocks? With those, the springs are what take the load and the shock just really keeps the spring from being, well, springy. I come from the automotive racing world and only dabble in aviation, but I would say the coilover setup would be the best to prevent a roll over and be able to handle any off airport work.
Love the build, definitely got me thinking about building and stepping outside of the comfort of my C172!
Oh yeah they are going back on. I just had them off to show and test the design.
Thanks for the comment
Nice concept, just not sure if your shock coils will be strong enough ?
Cheers from Canada
Yea, I was looking for the triangle crossbars underneath.
@@imontime77 That's a cabane v, the basic standard of the time when bungee straps were the standard for landing gear. His design is basically transferring the landing into compression rather than tension.
Thank you for always motivating me 🙏🏽 im pushing for my PPL at the moment and one day wish to build my own aircraft.
Jonas is on fire! I'm a PPL in flight school out of WA state. Look forward to getting a bush plane myself.
I love your landing gear design in keeping the shocks and coils inboard to reduce aero drag. It also allows you to install a sway bar that I think you will need for nasty turbulent crosswind landings.
I'm a little surprised you don't have the front gears angled a little more forward to reduce the possibility of a nose-over. Your geometry should allow.
I wonder why Trent's KitFox, even with the new heavier engine (100 lbs. plus) allows him to land with the tires locked without a nose-over and your KitFox did kiss the ground.
Also, I would contact one of your engineer buddies (or get a load management program) to run some quick calculations on the stress and shear on your landing gear bolts. All is needed is the weight of your plane. Your 3/8 in bolt seem light at first thought.
Thanks for your vlogs, they are fantastic.
I had a similar thought as Jonas was describing the suspension struts and the process he had followed. My first thought, as he described stepping up to the 3/8" bolt was that the whole weight on that side of the gear, times the impact force, times the length of the lever... Mmmm. A little extraneous calculation might be in order. It might be a good time to pull out that "Good Ol' Slide Rule!" I have a couple very good (OLD) Pickets in my desk drawer. I know the batteries are still good! I'd be glad to loan you one. ; ^)
I am a lot more concern about the pipe breaking (flexing) near the bolt just after the reinforcement than the bolt itself.
Hopefully the tests will tell.
@@MrGaryGG48 Come on ... Really. Jonas is a young buck. He never heard of a slide rule. And Pickets... isn't that part of a fence? LOL You gave me an idea. I'm going to send Jonas a Picket slide rule. Think he will know what it's for? After watching the video again, I'm concerned about other mounting points too. Oh well.
@@petittoto7433 I agree. I missed that on the first review. Actually, I would redesign much of that birdcage.
@@jrs9144 You're right John, he is a "young buck" but he's a pretty creative one. I'd just hate to see him and his girlfriend get hurt if mounting points or under-sized bolts or anything else, for that matter, failed. I've seen the results of a small plane getting slammed into the runway due to a unexpected down-draft. It collapsed the right side gear, put the wing tip into the ground and thoroughly messed up the airplane. My wife's friend was the student pilot doing one of her solo flights which became her last fight. She decided about the time that the wing tip bit the dust, that she just didn't want do that anymore. She walked away but it was slowly and a bit unevenly.
Hey man I love your Channel! I am pretty new to the whole aviation thing but I love the fabrication side of it. its awesome to see a plane be built by someone. I've been welding and fabricating things for several years now and never considered building a plane. Maybe I'll put it on my bucket list. Keep up the good work and keep showing us the fab side of it! I love it!
Didn't you also help record some of the footage for the original rage gear? I believe we met when John and I visited Joel and did the first flight test of the original rage gear. The first plane you highlighted in Johns builds was The Raven. It had a very unique set of controls that effectively gave it flaperons. The Hillcat is the latest though much of his time is taken up with building his bush Gear and Rage Suspension. I'm his nephew and worked in his shop during the first several iterations of the rage gear.
Yes I did. I built the camera mount and filmed it. My brother edited it.
@@JonasMarcinko I thought I recognized you. Just found your videos out of the blue a few days ago because it hit my randon youtube feed and then i heard you mention John. Good job on the plane, if John speaks even mildly excited about your work then you know you are doing great.
I will be looking for the Upside Down Club shirts. That takes care of at least 2 Birthdays or Christmas presents that I know of.
Hey! You can find them all here:
teespring.com/stores/jonas-marcinko?aid=marketplace&tsmac=marketplace&tsmic=campaign
😆 you have some fun friends;)
@@JonasMarcinko I won't name names but......I could join the Prop Strike Club.
So,,,,,,,, don't give them any ideas.......
Hello @jonasmarcinko is this project still happening? I just found and subscribed to your channel but since this video don't see any updates. Thanks!
In a pinch you can use ratchet straps to get the coil springs on and off of the shocks. The kind that don't have hooks.
Jonas
You should look at what formula 1 and indy cars run on the way they use cams for getting lots of movement withe the shock barely moving it make the shock last longer i that would work great on your plane. I am working on planning it on our dirt latemodel racecar , similarly to what you ate doing .look up dirt latemodels it will give you some more ideals too. Check coilovers for race car they are cheaper and in some cases better.
Thanks V h for the ideas.
Really been enjoying your videos man! Glad i found the channel.
So Jonas... did you ever get any more done on Defiance?
Just came across your channel and love it. I started flying in the early 80's, however, the costs escalated so I stopped BUT I never lost the love of flying. Now I fly a drone and have truly enjoyed watching your videos, brings back the rush of flying. Wish I knew about the Kitfox in the 80's and 90's. Keep up the good flying and keep posting. Thank you....
Thanks Craig!
@@JonasMarcinko Hi genius!!
Did you ever finish defiance?
Sick!!! Would like to see how you apply the fibre glass!
You are becoming very good at this!!!!
Great progress Jonas! Definitely looking forward to the gear (drop) testing phase! :)
why would you just drop the front of this plane, there is forward movement when landing
Those Edge performance Epex engines are amazing. 300hp is awesome yet I think I saw a dyno run on his Instagram of almost 397hp. What are you thinking for wheels and brakes? The Beringer dual caliper setup is gorgeous and seems to perform amazingly well.
I noted the springs on the work bench. Are they going back on? do you have room for them? Clearence was kinda of small in there...Good luck....lol
They fit. But it’s tight!
Dd you use #8 high strength bolts? No extra weight, but much added strength, especially on the pivot bolts. Just thinking..... Love your work!
Oh yea. Go with that Yammer’hammer. Love the sound of that 10,000 RPM kicking butt. I will finally get to see it in person here in Texas in March. Steve is on the schedule.
Hope you can make it out to.
With that geometry, the gear legs are going to transfer more energy directly to the frame rather than through the shocks at full droop.
The camber on a decent size bush tire at full droop will cause the tires themselves to want to push inward instead of outward on touchdown.
This effect will be magnified if you land on one wheel in a crosswind.
Expect your gear legs to bend/crack, and if you truss the legs you'll transfer that problem to the frame instead.
Toe out is a bandaid fix for tire scrub and won't help the issue...especially when you consider how negatively it affect handling on the ground.
My advice is to extend and truss the legs, adjust the shock mounting point so the max droop is less and compression travel is extended, and make up for the loss in prop clearance by using a larger tire size. Gear failure is the last thing you want in a bush plane.
Some very good points. I completely understand and knew this while building them. Hopefully they work! I’m anticipating that the tire will take the initial impact and then the gear will fallow! Maybe it won’t be enough though.
@@JonasMarcinko I sure hope so man, you put a lot of work into it. Ultimately, the tire size and toe out will be the two factors to concentrate on. Might be a good excuse to invest in a high speed cam and mount it on the belly to see what happens on touchdown.
Looks like a fun build. However, I am concerned with a few design details of your landing gear. You will have a huge bending moment at the hinge point of the forward gear tube and at max load. I recommend you perform a few bending moment calculations at various loading conditions. A second issue I see is the large gap between the gear and fuselage hinge tabs. Even though bushings are installed to reduce bearing stress, the large gap introduces bolt bending and reduces the capability of the bolt. You don’t want a bolt in bending, the bolt should be in shear and bearing for this application.
Can you make video about Installing a Pitot-Static System?
Very similar gear system to my Stinson 108-3.
What do you think about BERRINGER's double pivot anti-Ground-loop tail wheel. It seems to me to be an advantage to any tail-dragger. I don't have any practical experience about it - I am just a passionate armchair engineer.
Wow! How much fun can a guy have? Love this video!
I like the inboard shock design, I do have concerns the gear legs aren't going to be up to the challenge with the long moment arm.
What material u use for fuselage..? stainles steel tubes or iron tubes ??
I’m interested to see this gear design work. I’d mentally designed pretty much the same idea for the rockhopper but hadn’t committed to it just yet. I may “future proof” that area of the fuse so I can run a traditional cub style gear or clean it up later.
I love the strut style landing gear
Great video, I'm hoping to get material in the next week or so to start my scratch build.
That’s so rad! Congrats. Good luck 👍
Hello Jonas, which program are You using for drawing and designing?
Awesome video I’m enjoying the build process. I’m really looking forward to seeing it as you make progress and the final product and flight.
Do you have to install the co pilot controls? or can you leave them out?
Do you have a video when you got your kitfox?
Hi Jonas, nice work and nice videos! I enjoy your videos as much as your content. Your welding look above average. "It will fly" is not the answer I would want to hear.When it comes to aviation, perfection is reasonable.
Hello sir which metal you use for building this structure?
The beard looks good on you LOL! Defiance is going to be one awesome plane!!
How about cable from the gear axle to the opposite side fusalage mount point to assist the gear when it reaches the end of its travel
You pretty much described the gear on the PZL P.11 fighter. A round cable or tube has loads of drag.
Look into a Renton Coil Spring (RCS) Titanium spring. Mine was almost 2 pounds lighter than my steel spring.
DO YOU HAVE to have an official inspect your welding and the frame as you go along ?? I know you do on DIY helicopter frames . ?
TOMAS I am curious about this now. My understanding was that they only inspect it once when it is done
@@chrisbowpiloto It depends on the classification of the plane. For example UL doesn't require inspection.
Hey Jonas, was nice meeting up with you. Fun to see the gear up close. That'll work great. Nice work! And again, classy videos.
Thanks for the reply. If you have time look up a small landing strip jumper hills CO 29 Parachute Colorado. Drop in for a visit sometime after the snow is gone would like to check out your KitFox and say Hi.
Are you selling the Kitfox once the new plane is finished?
I know this is late and someone may have said it already but....a spring compressor (like for automotive struts) would go a long way for your gut when you’re taking those springs off.
what is the best plane to adapt to a bush plane? - I thought we could do it with a Cessna 180 - what can you tell me? thanks.
I wonder at the very small diameter of the tubing in use?? A thin-wall, larger diameter tubing is much more rigid, per weight, no? Also, if you are suing carbon fibre in places, could you not make some of those sections in a monocoque fashion, or stressed-skin?? Just asking?
.5 .035 you are correct. And yes that would be a good idea for the carbon.
@@JonasMarcinko thx :-)
I'm not a pilot, but would love to be so subscribed because love your videos. In watching I noticed we may be from the same small town, is that Jensen's Grove next to you?
Its kicking along well Jonas! keep the Videos coming, people need content!
make sure you get some good quality sound proofing, it can help a-lot with vibration as well, also it makes longer flights more comfortable because there is less noise. keep up the good work, love your metal work
Loving the new build video content
awesome job jonas keep going buddy
Did you take the coils off just because of the clearance issues? Doesn't that defeat the purpose of using coil-over shocks?
I needed them off to see how everything worked. They fit but are very tight tolerance.
Very much like the Stinson 108-1 except the Stinson had a single tubular gear leg. Cool
Why didn't you put the suspension cage directly below the vertical rod of the body?
Haven't been in the upside down club, but have done an engine out into a strip mine, and took out the top two strands of a barb wire fence, ripping off one wheel, and bellied it into the ground. Any landing you can walk away from.......
Is that a paramotor on the shelf? Do you fly Paramotors?
What chrome moly material are you using for the frame?
What is the prop tip clearance when the gear is fully extended? Have your thought about limit straps for the gear?
Do you TIG or MIG weld? What rod or wire and gas do you use?
You need to do many more videos like this one. It's pretty awesome.
What design software are you using? There was a little clip of it at 8:06. Thanks!
Awesome Jonas! Your build vids are like Mike Patey's, just a little bit closer to my budget! :-) Would love to scratch build my own plane.
yeah plus he isn't saying "back to work" every minute, meanwhile having paid camera guys and helpers doing all the work
Turbo Tastic based on all of Mike's videos I've seen plus those of others, where they may have featured a clip of them helping, I would be of the humble opinion that Mike does most of the work himself with a little help from his friends when two hands ain't enough.
@@f2air You may be right, he enjoys doing the work, but setting up cameras to film is usually more work than the work itself, and I'm pretty sure he has a full time hired help camera man. Still impressive what they all do, just got tired of watching Mike Patey, if you throw enough money at things you can build anything; he bought his wife a $200,000+ plane for her birthday, so that explains a lot too. What isn't explained is how he ran a 200+ deck building company when in high school.. he must have walked into a lucky deal, I don't know anyone that needs that many decks, even for a team of 2, finding people that need decks would be difficult.
@@Turbo_Tastic Unless I've heard lies, Mike and Mark started with $0 and worked to achieve what they have, so I certainly wouldn't begrudge them.
@@f2air but you'll accuse me begrudging them? I'm just saying they don't seem particularly bright, he's no Tony Stark.. anyone that builds a 6 wheeled Jeep is not a person that I would rank high up the totem pole of intelligence. Everyone starts with $0, it is called childbirth. Then people fall into big contracts, just like Gary Johnson starting his handyman company.. with a huge government contract (stolen money, taxes are theft). So who helped them, they got zero help you are saying? They had $0, so they were orphans on the street, since childbirth? that's $0. I would love to hear the whole story, if you have a link to details and facts.
Whenever your ready buddy!!
Would one more tube from wheel to shock make it super strong like a triangle pyramid? I'm no expert, just a question.
Looking Great Jonas, Not much goes to plan hey? :) your must have like 100 hours in that gear but its totally payed off and its a one off , Your own design so that's really cool.
Love the bench it will serve you well, Maybe you could Pop the Pilot Yak on there and give as tour of it :) When did you last fly it? Looking forward to the nest vid - The Hodge.
Been staring at this screen waiting on the next one.
I really enjoy watching your videos, would like to see more detail on the DEFIANCE build. Has anyone installed an arctic cat Z1 1300 motor in a bush plane?
I have not heard of anyone doing that.
Reminds me of my mispent aviation youth except you have some better tools and tech is so good today. God bless ya, good job be safe
Hey Jonas - I recognize that Roberts Gear video. 😜. Keep up the good work. Diggin the suspension design.
Haha 😆 Thanks Emmet!
Awesome. Keep pushing. You got this. 🔥
Do you mig weld all of your airframes? Thinking of building a home built and want your opinion mig over tig ect
You could tack it with mig then come back with the tig but honestly the mig is just as good. Almost all kit planes are Mig welded
That’s a nice Rc yak 54 hanging from the ceiling, you should make a video on it.
Is your aircraft a Bearhawk, has the powertrain been modified? I really like your plane, I am from China
It's variation of a few different designs. thanks!
For somebody just getting into this is a kit fox a better plane or is just aircraft better for a beginner?
Equal for a newbie. Both share a common heritage, the original Dean Wilson designed Avid Flyer.
Mate I love these hands on videos you do. Great content.