Whirlygig 3" 4S Tricopter

By 1Smug_Bastard on Jun 04, 2019

8 224 3

Remix of the original Whirlygig 2" to reduce flex and improve flight performance. Copter arms are teardrop shaped to allow for better airflow.

Thanks to the removal of the Servo-holder, the entire print is done inverted and thus print supports are no longer needed!
From this point on, a single Nylon M2-screw is used thru the frame to support the Servo via its tab.
(as needed a Zip-Tie can still be used to provide additional support)

Notes:

Weight with battery 117 grams with 4:1 TWR.
Emax 1106-4500kv motors are set to a Throttle Multiplier of .52 effectively running at 2340kv.
Frame Printed from Nylon / Carbon mix with 0.4 mm print head.
2.5 mm wide zipties used.
Microcam / VTX not yet installed. Should manage this by the end of the week if all goes well.
For those interested in aquiring the frame, please msg me directly.

Photos

Part List

Frame	Whirlygig 2 and 3" Toothpick frames by 1Smug_Bastard Thingiverse.com	See Site
Flight Controller	Matek F405-MINI Flight Controller w/ F405, 32k Gyro, BFOSD, 32M Flash (2 builds) Getfpv.com	$31.99
ESCs	Aikon AK32PIN 4-in-1 25A 6S 20x20 Copterfarm.de	$55.95
Motors	3 x EMAX RS1106 II 4500Kv Micro Motor (20 builds) Racedayquads.com	$38.97
Propellers	EMAX Avan Mini 3x2.4x3 Tri-Blade 3" Prop 12 Pack - Choose Your ColorRed (8 builds) Racedayquads.com	$4.49
Receiver	FrSky R-XSR SBUS 2.4GHz Micro ReceiverDefault Title (652 builds) Racedayquads.com	$19.99
Batteries	Tattu 14.8V 4S 450mAh 75C LiPo Micro Battery Battery - XT30 (5 builds) Racedayquads.com	$10.11
Power Distribution	Lumenier Mini 4 Power + PDB 20x20mm 5v/8v Reg 100A Curr Copterfarm.de	$16.71
Hardware	BMS-101HV (Coreless) Blue-bird-model.com	See Site
Misc Parts	M2 Nylon Hex Male-Female Spacer Standoffs Screw Nut Assortment Kit (Black) for 2"/3" and 20x20 Rigs Rotorriot.com	$8.99

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Discussion

Jodie Froster 13 days ago

Sick man, profiling the arms like that is right on time!

1Smug_Bastard 12 days ago

Thus far its much stiffer than the earlier 2” whirlygig and has tons of power. So much so, i have to scale the motor back by half. Yet still the TWR is 4:1 !

Only issue i have this far is that the DYS 4-in-1 F18 ESC is garbage. Dam thing has had issues from the very first moment. Everything from it not keeping Sync with any protocal other than dShot-300 to motors that sputter in flight. Will replace with an Aikon unit tomorrow. Motors ohm out fine so i dont really have any other option but to toss the DYS.

Edit: Powered up the Aikon ESC alone to have it short out instantly! (WTF)

Jodie Froster 9 days ago

Brutal.

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