My Version of the RC Explorer Tricopter 2.6 HV
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- Опубліковано 8 вер 2024
- Here's my V2.6HV Tricopter. I'm using 4s Batteries (a 2600mAh and a 3300mAh). For Details, check Davids RC Explorer website.
Differences to Davids Tri:
- Top tricopter frame plate is wider, so the kk Board is protected better ( 1:50 )
- The arms are made of 15x15mm balsa sticks wrapped in 50g/m^2 Glasfiber. Apply the cloth in 45° Angle for more torsional stiffness.
- The Battery/ Camera plate is mounted with two diy carbon brackets and is built as a hollow profile for increased stiffness. The increased length gives more flexibility with differently heavy batteries, cameras, mounts.
- diy GoPro holder that is removable, so you can try different mounting methods like the camera stabilizer.
View the KK board settings in the end of the video.
Weight: 751g including 1-Axis stabelization mount, without Gopro (+100g) and Battery (+282g)
Flight time: I set the alarm to 8min for both the 2600mAh and the 3300mAh, so around 12min are possible, but I prefer not to drain the batteries too much for a better lifetime. The battery alarm from the kk board is set to 13.8V, but I never go that far.
Music:
Raven_party - X3mp
The Signal - BertycoX
Great flight
thanks, I ended up printing out the same body at 200% and then pressed 5 layers of fiber and resin between 2 layers of glass.
I made 4 plates so I can make 2 of them.
With 3s and 4s it is meant that there are 3 or 4 Lipo Battery Cells connected together in series. One Lipo Cell has a nominal voltage of 3.7 Volt. with 4s you get 4 x 3.7V = 14.8V for that battery pack.
(acutally when fully charged, you get 4.2V per cell)
A 3 cell Lipo would have 11.1V. So with the same prop on the motor, but a higher voltage, you get a higher rpm. But at some point, if the prop is too big, the motor and/or the controller gets too hot.
Yes, it's just the kk board option. Actually it's an analog servo used here. I tried a few servos i had around and this was the best of those. It's more important that the servo has little to none play than being digital. But if you have a good digital servo, use that.
I used a carbon mesh tube, put a strip of Balsa in it, soaked it in epoxy. Then I wrapped it around the wanted shape, and pressed it.
Result is the best if you use a vakuum pump to press it.
I set the timer on the tx to 8min. (both with 2600 and 3300mAh cells). The undervoltage alarm of 3.2V/Cell never kicks in. So I guess I have plenty of spare time. Depends on how you fly as well, when flying fpv, I tend to be more carefull and need less power.
I'm using 9x4.7 Props. Watch out that you don't kill your Motors/ ESC when putting bigger props on (with 4s Batteries, with 3s its ok). I have not tried bigger props, but you should measure the current if you try out a bigger prop.
Looks great! What motors did you use?
DT750 from Hobbyking, according to the datasheet they are only for up to 3 cells, but they work well with 4s. Just don't put any bigger props on. Check rcexplorer.se
Where did you get the camera tilt gimbal? Did you just use a digital servo with the KK2.0 board camera stabilizer options?
the booms are 355mm long, 335mm from the joint to the end of the boom. I changed the position of the screws which prevent the boom from folding forward so it works with 10x10mm sticks (my first booms were 10x10 pine wood). I had to carve in the 15x15mm booms where the screws are, so i still get the 120° angle.
I don't remember the weight of the booms, but they were a bit heavier than the pine wood sticks, though only a couple of grams.
Hey. Then my tricopter is in the air the yaw servo twitches. I have tried to increase/Decrease the servo filter but it did not work.
Do you have any solution to this?
Are you going to upload some more videos with the tricopter soon?
Kind regards Mathias
Is there a difference between a 3s battery and 4s battery? in a tricopter
I used 3 x (around) 17A turnigy plush ESCs will this be ok?
The DT750 has a 4mm shaft with M4 thread (unusual). You will need a prop mount. Having the props nicely centered on the motor will make your life easier when ballancing the motor/prop. For GWS EP prop (RD-9047 228x119mm) from HK you dont need a seperate prop mount. But you will need to do lots of balancing with this prop.
You should use a battery with more than 20C. 20c * 3A = 60A max Current -> 3x 20A ESC will use 60A, its better to have some buffer there or the battery will have a short life..
I have 11.1 v 2200 mah battery can I use this
What kind of flight times are you getting with this setup?
Which size props do you use? I´m using 11x4,7.
how did u make the carbon frame?
Hi
I had that problem as well. First, balance your props, then balance your motor with the prop on it. Like they show on flitetest with a mirror and a laser. Do this until you cannot improve anymore.
Then try different ways of mounting the KK board (dampening). For me, the earplugs worked best. But watch out, the jittering got worse when the mounting of the KK was too soft.
I will upload new videos, but atm i just don't have enough good footage.
I'm in Switzerland too, where did you buy the middle carbon fiber for the middle plate? How thick is it? Thank
I got it from Hobbyking.com.
It is 1.5mm thick.
In swiss hobbyshops it is to expensive. Like 80CHF for one sheet. I recommend woven sheets if available. It is tougher and looks cooler than the non-woven sheets. Don't order stuf from Hobbyking that is not on stock. It will take months. Still calculate about 1 month if they have it on stock. Don't take the expensive shippment. The slow part is Hobbyking itself, not the sipping. Use Paypal.
hobbyking.com/hobbyking/store/__10442__Woven_Carbon_Fiber_Sheet_300x100_1_5MM_Thick_.html
TheWololooo Thanks for your answer. Your right woven looks much better. Too bad it's so expensive in Switzerland.
TheWololooo just an extra question. Is carbon strong enough? What is the advantage over glass fiber or plexiglass?
t3llos
strength: carbon fiber > glass fiber > plywood (multiple thin layered) > plexiglass
depends on the thickness you use of course...
1.5mm carbon sheet is very tough. 1.5mm plywood (would probably have 3 layers) will not be enough and plexiglass (rather Polycarbonate, than PMMA) will need to be thicker as well.
My Guess:
carbon: 1.5mm
glass fiber: probably 1.5mm okay, maybe 2mm
Birch Plywood: 3mm, around 5 layers I guess.
Plexiglass: would rather use PC, or POM, maybe 4mm thick? PMMA is not that nice to cut (melts) POM is very hard to glue (only with special treatment).
One downside of carbon is that it is electrically conductive, and can shield Radio signals. You can use whatever you want. Just adjust the thickness and keep in mind how you want to cut it and how you assemble it. Best would be, if you take a look at the stuff in a store and get a feeling on the strength of the material.
TheWololooo Ok I'll have a look around. Thanks for the detailed answer!
I might use plexiglass, 4-5mm and the coffin shape.
I will also look if I can find CF plate that aren't too expensive.
Flight time: I set the alarm to 8min for both the 2600mAh and the 3300mAh, so around 12min are possible, but I prefer not to drain the batteries too much for a better lifetime.
Thank you so much for the answers :)
Would this be a nice setup
Graupner 9x5
4s 3000mah 20c
DT750 motors
And then the KK2 settings in this video.
Great Job!
Are the esc the same as the “stock “ v2.6 HV ?
Yes, and reflashed with simonk firmware just like the describtion on rcexplorer.se
Thanks for your quick response and I have a question.
Next year I want to build the RC Explorer 2,6 HV and I want to use the Turnigy Plush 30 amp ESC to have room to grow for bigger motors but I dont know if its easy to reflash thejm because I dont have the skill and the tools for SMD soldering.
Did you test the setup with a 3 S Lipo ?
***** i did not test my setup with 3S, but i think you would need different size props to do so. The props from version 2.5 I guess. But i think your idea of using 30 ampere esc is good. But maybe you want to use the stronger motors from start on instead of using the DT750? I saw that in the meantime there are a lot of motors around that can be used for multirotors (low kv). The DT750 are great for its price and i am still using them on my Tri. But it does take a lot of effort to get vibration free video. I found out that they just are not that precicely machined, so the rotor axle is slightly offset/tilted to center. This creates a lot of vibration that you need to take care of by ballancing the motors with mounted props (laser-mirror technique) but you will never be able to take out all unbalance, because there is also a dynamic unbalance to it... So you need a good vibration dampening to take care of the rest of the vibration.
I would try a different motor so you have less work afterwards.
TheWololooo Dose the ziptie ( I'm german and dont now how to write them :/ )
method not work in this case ?
And do you know alternativ motors ?
Greedings
Where did you get your gimbal?? It looks so Awesome!! I want one for mine :D
I think there is no gimbal
It is a 1axis gimbal somewhere in the vid ;) cant remenber where :D
Oh yeah, now I see it, sorry!
The Gimbal is selff-made. You can set up the KK board to control up to two axes of a gimbal. Its not difficult to make. I have a Video showing more details.
Tricopter with simple KK Board Gimbal
ok, thanks :D
sehr schöner Tri und gutes Filmchen
Hast du den 1 Axis Stabi selber gebau oder was ist das für ein Modell ?
gruß
is that switzerland? haven't seen a landscape that similar to switzerland yet :D
It is :-)
Try Self Leveling on P-Gain:45 and P-Limit:20.
How long can it fly? It's amazing :O
Ungefähr 12min maximum, Um die Akkus zu schonen fliege ich nur so 8min/Akku.
TheWololooo Ach sie/du bist auch deutsch =)
Echt? Ich dachte mit High Voltage, und diesen Motoren können die deutlich länger fliegen :O
Weil die Flugzeit ist, finde ich, bei jedem Multicopter ein Nachteil :/ Ich will einen, der auch mindestens 20 Minuten fliegen kann... Ich baue gerade meinen eigenen Tricopter und ja, mal sehen wie lange der durchhält :)
ElefantenEsser1
Schau mal bei Flitetest die neue Folge. Der eine Multicopter soll 20min durchhalten. Finde mal raus was für Motoren, Propeller, Akkus die verwenden. Die Flugzeit ist auch sehr abhängig vom Flugstil. Wenn du lediglich hoverst, hält der Akku wesentlich länger als wenn du mal ordentlich Gas gibst. Ich könnt mal messen wie lange meiner hovern kann...
TheWololooo Okay, ich schaus mir an :) Und nein, musst du nicht, nur hovern is ja langweilig :O