# Skywalker X6 Vtol Quadplane nose-dives in fbwa **URL:** \ **Category:** PX4 Autopilot\ **Created:** [February 28, 2017, 8:58am UTC](https://discuss.px4.io/t/skywalker-x6-vtol-quadplane-nose-dives-in-fbwa/2588 "2017-02-28T08:58:16Z")\ **Posts on this page:** 13\ **Page:** 1
**Author:** ![Hmbasit](https://discuss.px4.io/letter_avatar_proxy/v4/letter/h/779978/32.png) [@Hmbasit](https://discuss.px4.io/u/Hmbasit)\ **Post date:** [February 28, 2017, 8:58am UTC](https://discuss.px4.io/t/skywalker-x6-vtol-quadplane-nose-dives-in-fbwa/2588/1 "2017-02-28T08:58:17Z")
hi, im new to VTOLs but i have some experience in px4. I tried to setup a quadplane with x6 delta, 4x multistar 3508 700kv with 60 Amp HK escs. worked well in Qhover mode but after transitioning to FBWA it just nosedived a couple of time. i am using GPS only, no airspeed sensor right now. not knowing whats happeninng i disabled the quad mode and removed the quad motors and frame and tried to fly it in fbwa mode. it again nose dived rolling. tested a couple more times and everytime it happens… someone please identify the problem or what im missing. here is the log file > **[Google Drive: Sign-in](https://accounts.google.com/v3/signin/identifier?continue=https%3A%2F%2Fdrive.google.com%2Ffile%2Fd%2F0B1tkhQ-gB8slUkVJTVNabmozVTg%2Fview%3Fusp%3Dsharing&followup=https%3A%2F%2Fdrive.google.com%2Ffile%2Fd%2F0B1tkhQ-gB8slUkVJTVNabmozVTg%2Fview%3Fusp%3Dsharing&ifkv=AcMMx-dsAA4z0O4OL9oHmv_8vF7C8W9jqyBtiPZ_r5-py43d5nnqAWNf9ZTaZOnyCAcJ60ePQckPsw&osid=1&passive=1209600&service=wise&flowName=GlifWebSignIn&flowEntry=ServiceLogin&dsh=S1830254855%3A1729712910737984&ddm=0)** > > Access Google Drive with a Google account (for personal use) or Google Workspace account (for business use). Thanks Basit ---
**Author:** ![sanderux](https://discuss.px4.io/user_avatar/discuss.px4.io/sanderux/32/397_2.png) [@sanderux](https://discuss.px4.io/u/sanderux)\ **Post date:** [February 28, 2017, 9:05am UTC](https://discuss.px4.io/t/skywalker-x6-vtol-quadplane-nose-dives-in-fbwa/2588/2 "2017-02-28T09:05:59Z")
Hi Basit, You are using APM and not PX4. This discussion forum only deals with PX4. Please refer to the APM forums or give PX4 a try, that supports delta vtol’s out of the box. ---
**Author:** ![Hmbasit](https://discuss.px4.io/letter_avatar_proxy/v4/letter/h/779978/32.png) [@Hmbasit](https://discuss.px4.io/u/Hmbasit)\ **Post date:** [February 28, 2017, 9:08am UTC](https://discuss.px4.io/t/skywalker-x6-vtol-quadplane-nose-dives-in-fbwa/2588/3 "2017-02-28T09:08:55Z")
@sanderux im using a Pixhawk how did you infer im using an APM? ![](https://discuss.px4.io/uploads/default/original/1X/387b91b7b135f4d7810d8d82c38c94bd95d8c285.JPG) ---
**Author:** ![sanderux](https://discuss.px4.io/user_avatar/discuss.px4.io/sanderux/32/397_2.png) [@sanderux](https://discuss.px4.io/u/sanderux)\ **Post date:** [February 28, 2017, 9:45am UTC](https://discuss.px4.io/t/skywalker-x6-vtol-quadplane-nose-dives-in-fbwa/2588/4 "2017-02-28T09:45:14Z")
PX4 does not have Qhover flight mode, also your log file is in APM format. Based on the fact that you sent a picture it seems you are referring to the Flight Controller hardware. I understand this is confusing. The hardware (a pixhawk in this case) has 2 logo’s on it; APM and PX4. The software running on this hardware (compare it to the operating system on your computer) can be either APM or PX4. To install APM you normally use mission planner or apm planner. To install PX4 you normally use Qgroundcontrol. ---
**Author:** ![Hmbasit](https://discuss.px4.io/letter_avatar_proxy/v4/letter/h/779978/32.png) [@Hmbasit](https://discuss.px4.io/u/Hmbasit)\ **Post date:** [February 28, 2017, 9:49am UTC](https://discuss.px4.io/t/skywalker-x6-vtol-quadplane-nose-dives-in-fbwa/2588/5 "2017-02-28T09:49:05Z")
yes after you mentioned i figured out mission planner by default installs apm based firmwares. i am now configuring my plane in QGC. i set it to skywalker x5 as x6 wasnt there. i hope it goes well with this. Thanks ---
**Author:** ![sanderux](https://discuss.px4.io/user_avatar/discuss.px4.io/sanderux/32/397_2.png) [@sanderux](https://discuss.px4.io/u/sanderux)\ **Post date:** [February 28, 2017, 9:50am UTC](https://discuss.px4.io/t/skywalker-x6-vtol-quadplane-nose-dives-in-fbwa/2588/6 "2017-02-28T09:50:30Z")
for VTOL i would suggest you use Generic vtol delta ---
**Author:** ![Hmbasit](https://discuss.px4.io/letter_avatar_proxy/v4/letter/h/779978/32.png) [@Hmbasit](https://discuss.px4.io/u/Hmbasit)\ **Post date:** [February 28, 2017, 9:53am UTC](https://discuss.px4.io/t/skywalker-x6-vtol-quadplane-nose-dives-in-fbwa/2588/7 "2017-02-28T09:53:34Z")
i’ll start with the fixed wing config, test and varify it as most of the guys recommend. after that i’ll put my quad motors on it. QGC is a litlle bit non-user friendly for me cant find the parameter that changes the servo outputs ---
**Author:** ![sanderux](https://discuss.px4.io/user_avatar/discuss.px4.io/sanderux/32/397_2.png) [@sanderux](https://discuss.px4.io/u/sanderux)\ **Post date:** [February 28, 2017, 9:55am UTC](https://discuss.px4.io/t/skywalker-x6-vtol-quadplane-nose-dives-in-fbwa/2588/8 "2017-02-28T09:55:28Z")
Search for PWM\_MAIN You will get PWM\_MAINx\_REV to set ---
**Author:** ![sanderux](https://discuss.px4.io/user_avatar/discuss.px4.io/sanderux/32/397_2.png) [@sanderux](https://discuss.px4.io/u/sanderux)\ **Post date:** [February 28, 2017, 9:56am UTC](https://discuss.px4.io/t/skywalker-x6-vtol-quadplane-nose-dives-in-fbwa/2588/9 "2017-02-28T09:56:54Z")
Also note that when you switch to VTOL your outputs change. On a quad delta its: MAIN 1234 = quad motors AUX 1: left aileron AUX 2: right aileron AUX 3: pusher motor ---
**Author:** ![Hmbasit](https://discuss.px4.io/letter_avatar_proxy/v4/letter/h/779978/32.png) [@Hmbasit](https://discuss.px4.io/u/Hmbasit)\ **Post date:** [February 28, 2017, 9:58am UTC](https://discuss.px4.io/t/skywalker-x6-vtol-quadplane-nose-dives-in-fbwa/2588/10 "2017-02-28T09:58:54Z")
and for a conventional pusher they are all on MAIN 123? 1 and 2 for ailevons and 3 for pusher? ---
**Author:** ![sanderux](https://discuss.px4.io/user_avatar/discuss.px4.io/sanderux/32/397_2.png) [@sanderux](https://discuss.px4.io/u/sanderux)\ **Post date:** [February 28, 2017, 10:02am UTC](https://discuss.px4.io/t/skywalker-x6-vtol-quadplane-nose-dives-in-fbwa/2588/11 "2017-02-28T10:02:48Z")
3 is unused It’s 1/2 for elevons, 4 for pusher ---
**Author:** ![Hmbasit](https://discuss.px4.io/letter_avatar_proxy/v4/letter/h/779978/32.png) [@Hmbasit](https://discuss.px4.io/u/Hmbasit)\ **Post date:** [February 28, 2017, 11:47am UTC](https://discuss.px4.io/t/skywalker-x6-vtol-quadplane-nose-dives-in-fbwa/2588/12 "2017-02-28T11:47:37Z")
cant find the parameter to get my aelvons right from QGC and neighter my pusher turning… please help ---
**Author:** ![sanderux](https://discuss.px4.io/user_avatar/discuss.px4.io/sanderux/32/397_2.png) [@sanderux](https://discuss.px4.io/u/sanderux)\ **Post date:** [March 1, 2017, 11:21am UTC](https://discuss.px4.io/t/skywalker-x6-vtol-quadplane-nose-dives-in-fbwa/2588/13 "2017-03-01T11:21:46Z")
Pusher turning you can control by swapping any 2 of the 3 wires from your pusher esc to your motor. setting PWM\_MAIN1\_REV and/or PWM\_MAIN2\_REV to 1 should reverse the output on your ailerons