# Throttle stop after front transition

**URL:** <https://discuss.px4.io/t/throttle-stop-after-front-transition/5212>\
**Category:** PX4 Autopilot\
**Created:** [December 21, 2017, 1:44pm UTC](https://discuss.px4.io/t/throttle-stop-after-front-transition/5212 "2017-12-21T13:44:59Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![JohnSnowball1](https://discuss.px4.io/user_avatar/discuss.px4.io/johnsnowball1/32/9291_2.png) [@JohnSnowball1](https://discuss.px4.io/u/JohnSnowball1)\
**Post date:** [December 21, 2017, 1:45pm UTC](https://discuss.px4.io/t/throttle-stop-after-front-transition/5212/1 "2017-12-21T13:45:00Z")

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I got a full vtol mission flight, all goes well except that, after transition to fw, my plane suffered a height drop about 3 meter(not fatal, but confusing!)  
I checked my log, it shows that, the pusher throttle has a sudden drop after transition is done! My transition speed is set as 18m/s and I’m sure the motor is good enough for that.  
here is my flight report  
[https://logs.px4.io/plot\_app?log=f10ed9d8-4eab-4b31-962f-bd5c69178878](https://logs.px4.io/plot_app?log=f10ed9d8-4eab-4b31-962f-bd5c69178878)

 ![](https://discuss.px4.io/uploads/default/original/2X/5/5d7a31aa2f6f100f20e823bc2cb7e0531777df75.png)

and I checked source code, and I found one function might be related to this problem:

 ![](https://discuss.px4.io/uploads/default/original/2X/d/d1a6b587284cc9722147644976efb1f4454b0091.png)

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**Author:** ![dagar](https://discuss.px4.io/user_avatar/discuss.px4.io/dagar/32/22_2.png) [@dagar](https://discuss.px4.io/u/dagar)\
**Post date:** [December 23, 2017, 4:10pm UTC](https://discuss.px4.io/t/throttle-stop-after-front-transition/5212/2 "2017-12-23T16:10:11Z")

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For future reference, here’s the corresponding Github issue. [https://github.com/PX4/Firmware/issues/8508](https://github.com/PX4/Firmware/issues/8508)