rc bicopter

Last crawled date: 4 years, 4 months ago

my version of this cool build, i found the mg995 servos were causing an uncontrollable side to side wobble once i changed to mg90s that completely went away.
my configuration
2x 2212 920kv motors (soon to change because my 3d printed body is too heavy for them)
2x 30a esc
2x mg90 servos
kk mini 2.1.5 flight controller
3s 2200mah lipo
initial testing was done with 9x5 props then with 3d printed modified 3 bladed props modified from "fixed pitch helicopter" on here
video https://www.youtube.com/watch?v=KMLhcrIWzZM
note if after centering your servos they are level set the servo offset to 50, mine were not level after centering which is why my offset numbers are different, the servo offset setting makes the motor level, trimming on the radio will not correct non level motors in this configuration
also the motors pivot on a piece of bowden ptfe tube instead of bearings. 4mmODx3mmID tube works perfect. i used a piece of 3mm abs stick filament as the rod for them to pivot on just melt the ends and make a plastid rivot...or you can still use a 3mm bolt but i wanted to keep as much weight off as possible
settings that worked for me
PID SETTINGS
ROLL
PG 30
PL 100
IG 20
IL 20
PITCH
PG 30
PL 100
IG 20
IL 20
YAW
PG25
PL 20
IG 50
IL 10
STICK SCALING
ROLL 25
PITCH 30
YAW 35
THROTTLE 90
SELF LEVEL
PG 100
PL 20
MIXER EDITOR
CH1
throttle 100
aileron 0
elevator -100
rudder 0
offset 0
type ESC
rate HIGH
CH2
throttle 100
aileron 0
elevator 100
rudder 0
offset 0
type ESC
rate HIGH
CH3
throttle 0
aileron 60
elevator 0
rudder -60
offset 68
type SERVO
rate LOW
CH4
throttle 0
aileron -60
elevator 0
rudder -60
offset 40
type SERVO
rate LOW