Ultralight 85mm 1s whoop

By RecifeStargazer on May 13, 2022

7 387 3

This is my attempt to build a ultralight 1s 85mm whoop. I should have go with a diamondf4 elrs, and save another 2 grams, but worked with i had at the moment. So i've stripped off the board connectors and soldered the motors on the board (to remove board connectors and motor plugs saved a gram).
Tested with gemfan 2023 and hqprop 51mmx2. The first one provided more punch, at expense of add about 2.5 grams and is less efficient. The later provided 5:30 of flight time with a 450mah 1s, which is not so bad. It's raining too much now, then i'll fly outside later.

Photos

Part List

Frame	URUAV UZ85 85mm Wheelbase PVC Black Frame Kit for Whoop RC FPV Racing Drone (2 builds) Banggood.com	$9.99
Flight Controller	Happymodel ExpressLRS ELRS 2G4 F4 Whoop AIO Flight Controller (9 builds) Pyrodrone.com	$57.99
Motors	Happymodel EX1102 19000KV 1s Brushless Motor (Pack of 4) Shop.makerfire.com	$45.99
Propellers	HQProp 51MMX2-1.5MM Light Grey (2CW+2CCW)-Poly Carbonate Hqprop.com	$1.89
FPV Camera	RunCam Nano 3 800TVL CMOS FPV Camera w/ Plug (4 builds) Racedayquads.com	$19.99
Misc Parts	HappyModel Mobula6 / Mobula7 Whoop Canopy - BlackDefault Title (5 builds) Racedayquads.com	$2.99

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Discussion

ButterflyFPV Dec 15, 2022

Did you do any more flights? How durable are the motors?
I'm pretty happy with my 85mm 1S 1102 build but I would like some more kV to fly the Gemfan 2015. Currently I like the Gemfan 2023 better because they have a lot more pop for my full send flying style. youtube-> Butterfly85 1102 18k | FULL SEND | Fully developed | Last testflights

Mr_Stripes May 14, 2022

try gemfan 2015 biblade, perfect for this build.

RecifeStargazer May 14, 2022

thanks for the hint. i'll try to get some

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