Inverted 4S Whilrygig (3")

By 1Smug_Bastard on Nov 11, 2019

11  248  6

Built this up for a friend who wanted to try something really different yet didn't want to skimp on performance.

Note: The frame is completely custom of my own design so if your interested please PM me.

This Tricopter runs Betaflight 4.1 with motor filtering and has an attached Openlagger.
Weighing in at 142 grams with the 4S battery shown.
Thanks to the Emax 1108 motors, it boost a very nice TWR of 6 to 8:1. (Hovers around 12-15%)
I guestimate that just farting around you'll see a flight time of 4-6 minutes but full on crazy Acro may last 2-3.

Please be aware that I live in the EU so my over all cost is closer to $300 - 350.

Here is the video from it's sister craft (3" 2S Tricopter Whirlygig)

Photos

Discussion

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Locng   11 days ago  

Can you show me how to select rc servo? Can I use the emax 9051 https://m.banggood.com/Emax-ES9051-Digital-Mini-Servo-For-RC-Model-p-79261.html
Its much easier for me to buy from banggood or aliexpres. Thanks

1Smug_Bastard   11 days ago 

1st look up the dimensions of the Servo i listed as the spline size and tooth number is critical to the Tilt-Mechanism fitting on it.
2nd verify that the Servos width is similar , otherwise it will not be mountable on the frame.

Specs can be found there... https://www.blue-bird-model.com/products_detail/64.htm

Beyond that, your free to find / use what ever you wish.

joshielevy   28 days ago  

Post a video! I'd love to see it running

1Smug_Bastard   27 days ago 

Its been shipped off but I'll attach the step-response so you can see how the in-house tuning went.

Only issue with this design is that Betaflight doesnt have much in the way of servo support. A while back we had Triflight, which was BF modified to allow for the servo endpoint claibration and in-flight tail tune. I'm hopeing that soon this will change and thus allow for better Yaw prediction.

Sasquads   28 days ago  

Dude, that looks awesome.
Is it a carbon frame or 3D printed?
I want to build one.....

1Smug_Bastard   28 days ago 

Its made from carbon impregnated nylon. Can bend allot before breaking yet is very very stiff.

PM me.

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