Fatal last moments of the Penguin.

Final Flight and Crash of the Atom Penguin.

[@tachyonpost1472]

Very hard to see without the OSD at the end, but looks a bit like on the last turn for the RTH it was going too slow combined with a steep angle / slow airspeed and then it stalled. (also if there is a tailwind this effect gets even worse as slows down the effective airspeed) . So its vital that the advanced nav settings are such that the plain can maintain proper airspeed during a RTH.
for INAV these are typicaly :
nav_fw_cruise_thr (most important)
nav_fw_climb_angle
nav_fw_dive_angle
nav_pitch2thr
nav_fw_pitch2thr_threshold
nav_fw_pitch2thr_smoothing

[@terrymurphy562]

@@tachyonpost1472 thanks for the input, it looks like a stall but I have had Rth a few times on the plane and it responded very well. When the plane turned to come home and went into failsafe, the plane was pointing into wind although a very light wind. I was very surprised it done this. I will have a good think about the settings.

[@tachyonpost1472]

@@terrymurphy562 Yeah its a pitty you dont have OSD for the last phase (or blackbox) , that could have realy helped figuring this out. Its a complex topic. Sad for your loss and good luck with the rebuild

[@terrymurphy562]

@@tachyonpost1472 that’s right it would help greatly. 👍

[@terrymurphy562]

I now know what the problem was. I placed the Flight controller in another Plane and and induced a failsafe, the plane acted the same as when the original plane crashed but this time I had my vision unlike when I had the crash. In my screen it says move sticks to take control and that’s when I knew the problem. On the crash flight I had no vision and have obviously had movement on the sticks but was unable to see the plane attitude. Never had that situation before so have learned something. Thanks for your inputs.

[@robtraynor6753]

i recon a servo glitch

[@terrymurphy562]

@@robtraynor6753 very possible Rob but all servos work perfectly.

[@julianhumphrey4843]

maybe an esc popped i have heard stock ones can go

[@terrymurphy562]

Hi Julian, tested everything on the plane like servos, engines and esc. Everything works as it should.👍

[@pavelgurenchuk2225]

Очень много аккумуляторов на борту. Похоже на сваливание по ветру, хотя видно, что до этого вы летели по ветру. Может ветер изменился с изменением высоты. Почему вы не используете режим ANGLE или HOR?

[@terrymurphy562]

@@pavelgurenchuk2225 Acro

[@NigelWilliams-ui6jx]

Where were you tel

[@terrymurphy562]

@@NigelWilliams-ui6jx I was at the field. Found plane in Stalmine.

[@JakeBullit123]

Sounded a bit rough at the end. Lost motor/prop?

[@terrymurphy562]

@@JakeBullit123 No both props was on the plane. Probably sounds rough because of the Fc taking over from manual flight and changed the RPM to change the Altitude???

[@blackbirdboy1]

Very strange. So did it crash soon after F/S or head back for a while first? I've had a couple of sketchy F/S in the past which I attributed to it loosing signal then getting it back, loosing, back again etc which I think upsets the FC/INAV but it's never crashed me. I take it you never got your Rx link back? You did get some good distance out.

[@terrymurphy562]

@@blackbirdboy1 within a few seconds of Rth but never got the signal back to controller or goggles.

[@blackbirdboy1]

@@terrymurphy562 Was the Rx antenna on the rear of he plane? Does tend to be when it turns around you can loose Rd link. But doesn't explain why it didn't just initiate F/S and return home. Which version of INAV?

[@terrymurphy562]

@@blackbirdboy1 Antenna is towards the rear of the plane. Using latest version of inav. I even tried Rth before I headed out.

[@pavelgurenchuk2225]

What are battery you are used. I seen 20 V (means 6S) who many capacity? what type motor you are used? What full setup? who many fly you did with this setup?

[@terrymurphy562]

@@pavelgurenchuk2225 it is stock setup using a 5s lipo, had around 10 flights.