MobiFlight Community Support

Hello everyone.
I'm trying to build the 737 pmdg flap indicator using a common 180 degree servo engine mg995.
my question is simple. if my engine reaches a maximum of 180 degrees how can I use it properly for my project with a rotation of 270 degrees?
around I've seen that many have succeeded but I can not figure out how.
thank you.

Simply..... You can not ! ( Without improvisional technics)

The 180° Servo runs 180° and not more !

Basicly i will recomend to use STEPPER instead of Servo here..... But thats just a personal taste.... Its possible with servomotors also.
For Servos i think you got 3 ways....

1. You design a FlapGauge Backlabel that only have a range of 180° Then your Servo is perfect.
2. You buy another Servo that is already runs for 270 degrees ( Not know if that exist.... But 360° is available.... So you can use that and limit range to 270 then. )
3. You build a simple Cockweel Gear..... "1 : 1,5" for eample with a 20 and a 30 gearing . So 180° Input come to a (180*1,5=270) Output.
( Here again you can do it bigger, too.... If you use a 1:2 gearing you got 360° Then simply limit the range with the values in Mobiflight to 270°

Summary.... Myself i would use a stepper..... But the servo should work, too if you choose one of the suggestions.

Simply..... You can not ! ( Without improvisional technics)


3. You build a simple Cockweel Gear..... "1 : 1,5" for eample with a 20 and a 30 gearing . So 180° Input come to a (180*1,5=270) Output.
( Here again you can do it bigger, too.... If you use a 1:2 gearing you got 360° Then simply limit the range with the values in Mobiflight to 270°

Summary.... Myself i would use a stepper..... But the servo should work, too if you choose one of the suggestions.

from 1:12
https://www.youtube.com/watch?v=MOvGYejNfDc