Double Decker 175 mini FPV quadcopter by janmittner

Last crawled date: 3 years ago

UPDATE 2015/11/17: There is a new version with interesting features: http://www.thingiverse.com/thing:1138434
Double Decker 175 is a mini 180 class FPV racing quad which is easy to print & build and very funny to fly due to its size and agileness. It is designed to be one of the smallest frames that accommodate 4" propellers and standard size components like 1806 motors, CC3D atom flight controller board and full size FPV camera.
It's speciality is that it has two decks - in front it's tall enough to cover 32x32 mm FPV camera like Sony PZ0420. Rear part is as flat as possible so that the battery is close to the center of gravity for better flight performance.
Rear part includes CC3D atom flight controller (without plastic cover) that is partly embedded to bottom plate. Behind FC is a place for VTX, ideally some flat one like TS5823. In my build there was enough space for placing X4RSB receiver on the top of FC and VTX. The frame is also designed to protect VTX antenna and motors.
FPV camera plate has fixed angle of 20 degrees. Of course, this can be finely tuned by placing spacers between the camera and plate.
The frame also features lightweight sidewalls to protect all the cables etc.
When printed in ABS with 100% infill it's also very rigid and will survive many crashes.
Total frame weight is about 70 grams (ABS, 100% infill, M2.5 self-tapping screws), AUW with FPV gear and 3s lipo 1000 mAh is about 330 grams.
My recommended setup:
motors: 4x 1806 2280kv (or 1306 3100kv)
ESCs: 4x ZTW Spider 18A (or similar size and amps)
flight controller: CC3D Atom
propeller: DAL 4045 BN (or similar)
battery: 3S-4S LiPo 850-1300 mAh
FPV camera: Sony PZ0420
video TX: TS5823 200mW
Software:
BLHeli14.1 firmware for ESCs + Damped Light mode + Oneshot125
Cleanflight Luxfloat controller PIDs:
roll/pitch: 2.5, 0.040, 30
yaw: 8, 0.040, 5
looptime: 1600
This setup with 4S lipo has incredible flight performance with very high power to weight ratio.
Have fun!