Get the Quad here: www.Globe-Flight.de
This is my first really fast Quadcopter. The Tricopter was quite fast also, but this smaller one has tilted motors - which makes all the difference! It's just so cool to feel this "urge to fly forward fast" from the quad! Nice option here to change a few screws and have the motor arms straight or angled (3 steps: 0°, 10° or 20°).
The build was fairly easy, you have a good amount of space in the quad. The battery compartment is large enough to hold a 2250 4 cell - maybe even larger. But the best performance is achievable with small and extreme Lipos (1300mah Gensace 75C).
And that's already the first flight video:
ESCs: 4x 12A SimonK Maytech (without BEC)
Motors: 4x T-Motor MN2206 - 2000KV
Props: 6 x 4.5 ABS Gemfan Carbon reinforced
Battery: 1300mah 4 cell Gensace 75C (3mins) / 2200mah 4 cell Turnigy 45C (6 mins)
Weight: 720 / 820g (with either Gensace or Turnigy)
(Vendor): 620g (3s1300) - 700g with 4s1300 and Mobius
Separate BEC for powering the Naze32 board
Flight controller: Naze32 with Cleanflight 1.10 and Luxfloat PID controller
https://quadcoptersenzo.nl/en/Flightcontrollers/naze32_acro_funfly
PID Tuning:
BLHeli FW / ONEShot125
Current PIDs are not tuned out yet, I changed to BLHeli lately but need more flights with it.
My starting point:
Cleanflight 1.10
Oneshot125 enabled
Controller 2-Luxfloat
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|
P
|
I
|
D
|
Rate
|
|
Roll
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0,5
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0,10
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20
|
0,40
|
|
Pitch
|
1,6
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0,10
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30
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0,40
|
|
Yaw
|
4,5
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0,20
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0
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0,30
|
Issue with Yaw on fast miniquads (not only this one):
Reproduceable - on 45° dives from some altitude and with some speed, you "feel" that yaw gets unstable and suddenly it snaps 90° (or more?) to the right (most of the time).
I tried so many things (mostly PID tuning and trying different PID controllers in Cleanflight 1.9.0) but nothing helped. After I changed to DIFFERENT PROPS the problem went away.
The first set of props were normal, plastic Gemfan 5 x 4 (balanced with sandpaper) and the new ones were also Gemfan 6 x 4.5 carbon reinforced ones.
I think with the weight of around 800gr the quad was too heavy for the small props.
UPDATE: my friend Prometreus was also testing this quad and found that moving to BLHeli ESC firmware and using Onshot and Active Damping help to get the quad stable.
=>Video tutorial how to flash the Maytech ESCs to BLHeli
Links, Tips:
Black Bullet Buildlog (GERMAN) from Prometreus
Black Bullet RCGroups.com Thread
Android App for Cleanflight
FPV-Community Cleanflight Thread
PID Tuning Knowledge:
https://github.com/cleanflight/cleanflight/blob/master/docs/PID%20tuning.md
http://open-txu.org/home/special-interests/multirotor/cleanflight-pid-tuning/
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