# Control surface servos won't work VTOL quadplane

**URL:** <https://discuss.px4.io/t/control-surface-servos-wont-work-vtol-quadplane/11225>\
**Category:** PX4 Autopilot\
**Created:** [June 2, 2019, 3:50am UTC](https://discuss.px4.io/t/control-surface-servos-wont-work-vtol-quadplane/11225 "2019-06-02T03:50:32Z")\
**Posts on this page:** 1\
**Showing post:** 10

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**Author:** ![rollys](https://discuss.px4.io/user_avatar/discuss.px4.io/rollys/32/2081_2.png) [@rollys](https://discuss.px4.io/u/rollys)\
**Post date:** [June 6, 2019, 2:50am UTC](https://discuss.px4.io/t/control-surface-servos-wont-work-vtol-quadplane/11225/10 "2019-06-06T02:50:26Z")

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- Try changing SYS\_AUTOSTART = 13005
- Connections should be as follows:
  - MAIN1: motor 1
  - MAIN2: motor 2
  - MAIN3: motor 3
  - MAIN4: motor 4
  - AUX1: Aileron 1
  - AUX2: Aileron 2
  - AUX3: Elevator
  - AUX4: Rudder/Optional
  - AUX5: Throttle

- Make sure all props are removed.
- Follow the bench test procedure in Post# 2 above.

Good luck.

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