[Almost impossible to control speed on finals]

1 hour ago, UnsealedKarma said:

The short explanation is to remain at 75pct prop rpm as long as possible during the approach - the POH says until 500 AGL. 

The long, more technical story: The YouTube videos you see may use an older version of the aircraft so they are of limited use since the prop modelling was changed to the new mode introduced in SU8. That resulted in a very slippery plane that was impossible to slow down (at least at full prop rpm) for a short landing. As torque is lowered and the constant speed prop changes to a finer and finer pitch and into beta, the prop simply continued to give forward thrust or at least not induce any drag as you would expect on a turbo prop plane. It was suggested in other posts on this forum that this could be remedied by adjusting the new propzerothrustdrag parameter related to the the prop modelling in the aircraft.cfg. Instead, the devs in 1.05 chose to make the prop draggy by adding an ‘invisible spoiler’ in the code. When the prop pitch goes below 11 degrees (at below c. 15 torque) a 60 degree spoiler kicks in immediately. It feels like hitting a brick wall and the plane will fall out of the sky. Some weeks ago a dev replied to this issue and stated he was looking into it, but nothing has materialised.

In the meantime some DIY fixes has been suggested on this and the MSFS forum. The easiest is to go into the config files and change the spoiler angle to e.g. 30 degrees.
 

Thank you for these explanations. I now understand the essence of the problem.
What you described exactly matches the problem I encountered!
 

 

 

1 hour ago, Mathijs Kok said:

It is a complex issue and we are just now testing a new tweak for that. 

I'm glad and appreciate that the producer is already working on this problem.

Twin Otter is a great aircraft and I've spent many enjoyable hours with Twin Otter Extended for FSX.
Enough to say that the release of this single aircraft convinced me to buy MSFS and return to virtual flying in general

Twin Otter is a legend, both in reality and in Flight Simulator

[Almost impossible to control speed on finals]

Hi everyone!

I also returned to virtual flying, tempted by the new Twim Otter

I'm using CH Eclipse Yoke and I'm having the exact same problem - the Twin Otter becomes uncontrollable at low speeds.

It seems that at throttle settings below 20 PSI (torque press) something happens to the propellers, as if they suddenly go into idle mode. There is a distinct change in their sound (into a low buzz), the "Don't sink!" warning is activated and the plane stalls. As a result, it's almost impossible to reduce the speed to around 100kts, to the speed when you can extend the flaps.

I watched the tutorial on Youtube and I see that, at least with some people, the plane is perfectly controllable even with the throttle set to 10 PSI and the sound of the propellers is much different from mine and is completely normal. British Avgeek recommends doing the approach at 10 PSI, but with me at that throttle setting the plane stalls even if the flaps are set to 20!

I'm not using FSUIPC and I've checked the spoiler issue. I also set the throttle sensitivity settings on the yoke according to the manual.
Unfortunately in my case nothing helped