Hello everyone,

I built a 3 channel rc plane and recently I put an APM 2.8 on it. Has anyone built a rudder only rc plane with APM. I did enable the rudder_only param as well as kff_rudder_mx and also rcmap_yaw to channel 1, etc but I am not able to control the rudder in FBWA mode. The rudder doesnt move along with stick inputs. \


After that I did a test on omnibus f4 pro. Flashed arduplane on it. Enabled rudder_only and all the associated parameters. This board allows us to select the servo output unlike apm. I selected the output on the pin to which the servo is connected as both aileron and rudder one after the other and I was able to notice that the servo moves along with the stick input in both FBWA and manual mode.

my doubt with regards to APM is, why am I not getting rudder control in fbwa mode.
with regards to Omnibus is, which output should I select (aileron or rudder) for the pin to which the rudder servo is connected


nb: the plane flies well in the nomal (without rudder_only enabled) setup when the rudder servo is connected to the rudder(yaw) output pin
Eager to hear from you all.

thank you

Hi everyone, as I couldn't explore much on autopilot controlled fixed wing flight on this 3 channel rc plane, we built a four channel plane.
AUW 800 gms approx
Wing span 1400mm
root chord 240mm
tip chord 150mm
Cubic wing loading 5.6
Motor= generic 2212 1000kv
prop= gemfan 10*5
battery= 3s (mah yet to be decided)
emax servos *4
Autopilot = Omnibus f4 running arduplane

front fuselage is acrylic 3mm , rear is cf tube 14mm OD

More updates to come.

Posting some pictures. Maiden done today. Flew well in heavy winds. AUW is aroud 930gms (more than expected). Overall a good plane. Gps&compass, telemetry have to be connected. No provision for normal serial or CAN or I2C airspeed on the board , SPI ones are so costly.
Flew it in manual mode today. Motor and prop suggested by Iyer Sir but I used a 10*5 instead of 9.

Maiden video

Well done!

Thankyou Sir

well done

front fuselage , you are mentioning is fromf 3d printing or what ? , post buildin vedio of it

kp
chd

well done

front fuselage , you are mentioning is fromf 3d printing or what ? , post buildin vedio of it

kp
chd

Thankyou Sir. Front fuselage is laser cut from 3mm acrylic sheet

In case someone wants to cut this fuselage on acrylic, please use the attached dxf.  It is specifically for 2mm acrylic sheet. Saved some weight by using 2mm sheets instead of 3mm.

flew it today without the autopilot and was able to bring it home back in one piece .