Remix of the original Whirlygig 2" to reduce flex and improve flight performance. Copter arms are teardrop shaped to allow for better airflow.
Estimated Spec's calculated using https://www.xframe.tech/
Thrust to Weight Ratio: 6.25
Hover Flight Time: 21.1 minutes
Race Time: 6 minutes with max speed of 72 Mph.
Total Weight: 131 grams (Camera and battery)
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:
Edit: 7-5-2019, did the first flight (LOS) and cant get the throttle higher then 30-40% without the copter turning into a missile. Maybe more manageable in FPV flight but I have yet to try this. Tail wag is non existent but Roll / Pitch D-Term sounds a bit high due to slight warble sound observed. Was able to have a bit of fun with it Looping and Rolling like a champ!
Edit: 7-4-2019, was able to Auto-tune yesterday and perform a quick test flight today. Yaw is ungodly powerful when the throttle is punched. Will have to incrementally detune this to get something that plays nice.
Frame |
Prinhub 3D Printing Services
Printhub.store
|
See Site |
Flight Controller |
Matek F405-MINI Flight Controller w/ F405, 32k Gyro, BFOSD, 32M Flash
(3 builds)
Getfpv.com
|
$31.99 |
ESCs |
Aikon AK32PIN 4-in-1 25A 6S 20x20
Copterfarm.de
|
$60.75 |
Motors |
3 x EMAX RS1106 II 4500Kv Micro Motor
(31 builds)
Racedayquads.com
|
$38.97 |
Propellers |
EMAX Avan Mini 3x2.4x3 Tri-Blade 3" Prop 12 Pack - Choose Your ColorRed
(24 builds)
Racedayquads.com
|
$4.49 |
FPV Camera |
Crazepony MICRO FPV Quad
Crazepony.com
|
See Site |
Receiver |
FrSky R-XSR SBUS 2.4GHz Micro ReceiverDefault Title
(903 builds)
Racedayquads.com
|
$19.50 |
Batteries |
Tattu 14.8V 4S 450mAh 75C LiPo Micro Battery Battery - XT30
(36 builds)
Racedayquads.com
|
$14.44 |
Power Distribution |
Mini-360 DC-DC Buck converter | Solarbotics Ltd.
(3 builds)
Solarbotics.com
|
$4.49 |
Hardware |
BMS-101HV (Coreless)
Blue-bird-model.com
|
See Site |
Looks crazy, how did you get the Servo to work? did you Just Connect the Signal from the Servo to the free MotorSignal-pad?
I'm using pad "1" for the Servo with a PWM rate of 330Hz.. (Digital Servo running on 7.5V) From there just wire up the motors as you would any Quad.
Granted, this can also be done using Betaflight but from my own experiances with Beta, its not too Tri friendly. Specifically, tuning is a major pain, especially with a custom rig like this. PID's have to be kept low and worked upwards as even the slightest increase cause instability. You can surmise that this takes a long time and thus is not for those new to tuning.
This is awesome, design is really slick. how has it held up?
Yeah... far as i know of what currently have is Digital.
Pros: Faster, less jitter, higher PWM rates , often better torque.
Con's: A bit more expensive
Best to run the Servo at the highest voltage and PWM rate it can handle. This allows the response, torque and stall current to be much improved. I try to run at 7 volts / 330 hz if the hardware permits.
Sick man, profiling the arms like that is right on time!
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)
FPV has had quite a journey. Just a few years ago we started racing drones around a track and doing flips over trees, but professional cinematic FPV is a more recent development. DJI has always owned the drone photography market, but smaller acrobatic drones are starting to enter the market. They have the advantage of close proximity flight indoors and around people. There's more artistic freedom and..
Read moreFor the longest time we've been limited to 3 to 4 minutes of flight and lots and lots of batteries. With more efficient motors and frame designs it's now possible to push the envelope much further. This guide will walk you through the process of building a micro long range quad capable of flying 8-30 minutes and more than 4km. The build is moderately difficult, but with the right tools and steady hands..
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Looks Fast!
Its overly heavy and draws too much current. My later builds did much better and there are even videos too.