Randomly "banks"

[AVA117]

I have been flying the DHC-6 "Twin Otter" for a few weeks now...

I still don't know why it randomly banks to the left/right during approach. Sometimes it doesn't happen but sometimes it does.

[D-ECHO]

Hi AVA117,
I guess we'd need some more information to help you
-Which DHC6 do you use, where did you download it?
-Are you approaching by hand or are you using autopilot? If autopilot, are you using ILS or HDG/VS?
-At which airspeed are you approaching? Are you flying close to stall?
Regards
Echo

[dg-505]

My first guess would be that you simply get too slow, and the aircraft stalls and starts to spin.

Try it with a faster approach (not slower than 70 knots) and don't forget to set the flaps to reduce the stall speed.

[AVA117]

I do the recommended approach speed (60?-70 knots) and set my flaps to full.

I basically do what the checklist says... But sometimes it randomly banks.

[dg-505]

Do you hear the stall warning before the aircraft starts to bank?

If you use the version with floats, be aware that it stalls much earlier, i.e. at a considerably higher airspeed.

[dg-505]

Oh, and what is the aircraft's weight when it banks?
A more loaded aircraft will also stall earlier than an empty aircraft (low fuel and payload).

[AVA117]

Do you hear the stall warning before the aircraft starts to bank?

If you use the version with floats, be aware that it stalls much earlier, i.e. at a considerably higher airspeed.

I never used the floats version. And no, I would hear it but I will eventually recover after a few seconds it will do it, I also fly on the default loading it has on startup.

[dg-505]

Hmm... slowly I run out of ideas...
The only thing that comes to my mind would be that you are experiencing wind turbulences.
Can you check your weather settings?

[AVA117]

I'm not sure winds of 5.2 kts will do that to a twin otter lol..