AOA in slow flight
-
Hey guys,
just bought the turbo arrow and really like the work done there. However, I experience the same problems as described here: https://community.justflight.com/post/10544
Made some slow flight tests and the power vs angle of attack (AOA) combinations for everything below 80 knots in landing configuration are very unusual. You need to maintain over half of the elevator axis to keep 75 knts. Same can be seen when I trim it out - the trim scale is over half aft.
For the tests no specific settings changes were made - everything like after the plane installation and default MSFS flight settings.
What I did so far:
- reinstalled the plane
- all joystick axes are linear and newly calibrated
- all other mods removed
Any suggestion? Was there already a solution to this?
It's kind of feels like that after the first flaps the flight surfaces are just producing drag but no further lift. But thats pure speculation.
Best
-
Hey guys,
just bought the turbo arrow and really like the work done there. However, I experience the same problems as described here: https://community.justflight.com/post/10544
Made some slow flight tests and the power vs angle of attack (AOA) combinations for everything below 80 knots in landing configuration are very unusual. You need to maintain over half of the elevator axis to keep 75 knts. Same can be seen when I trim it out - the trim scale is over half aft.
For the tests no specific settings changes were made - everything like after the plane installation and default MSFS flight settings.
What I did so far:
- reinstalled the plane
- all joystick axes are linear and newly calibrated
- all other mods removed
Any suggestion? Was there already a solution to this?
It's kind of feels like that after the first flaps the flight surfaces are just producing drag but no further lift. But thats pure speculation.
Best
@Searinox
I just took both the 3 and the 4 for a brief circuit at MToW and the highest trim setting I used was 42% aft, with the stall horn blaring. Stall speed dirty should be around 61kts, Vref is approx 75kts. At 75kts, I was using no more than 20% aft trim with no additional elevator input to maintain a stable approach.Using what should be an identical situation to your setup (no changes, all weights and flight settings default) I used 31% aft trim to maintain level flight and a stable approach (both at 75kts), so slightly higher but obviously a slightly altered CG position.
Not sure why you are having to use over half aft trim, I never go anywhere near that tbh.
-
Hey @Delta558 ,
I ran some tests and it looks like its not the trim tab. It looks to me like the translation from joystick axis input to effective elevator movement seems somehow off. It just has a quarter of the effect as in other planes.See this little video I made: https://www.youtube.com/watch?v=-4xhQZuSqo8
With 100% SimVar Elevator I only have 12% "Aircraft Elevator" - which is not enough to arrest the desend without basically flying additionally with the trim tab to push the "Aircraft Elevator" value higher. In the Bonanza and the Cessnas the "Aircraft Elevator" value with 100% SimVar Elevator is around 40+% (without additional trim) and usually the same as the "Input Elevator" value.
You already see during the short final that I can basically not do anything more because I'm already at 100% Joystick Axis (100% SimVar Elevator) and I can barely hold the nose up.
Could that be the source of my Problem? Is there any other pilot error here? Desend rate and speed seem to be okay from my perspective
Best Searinox
-
I can only watch that on my phone at the moment (away making some noise with a Vulcan), once I'm home I'll look at it on the PC. One thing I can say, though, is that with the info I gave you in my previous post I still had plenty of up elevator effect left all the way down to below stall speed. Stabilised on the approach I could easily pull the nose up.
-
I can only watch that on my phone at the moment (away making some noise with a Vulcan), once I'm home I'll look at it on the PC. One thing I can say, though, is that with the info I gave you in my previous post I still had plenty of up elevator effect left all the way down to below stall speed. Stabilised on the approach I could easily pull the nose up.
@Delta558
No worries, have fun!
I investigated it a bit further in the meantime. The trim tab seems to have a lot more impact on the overall lift coefficient than the elevator itself - which is odd to me.
I tried to map my joystick to the trim axis and the trim to the elevator axis and that actually gave me realistic control over it in slow flight (looks very funny to steer that thing but only the trim tab moves). Can you try landing that thing without trimming it, because that seems to be the core of my problem - i.e. without trim, no slow flight possible because elevator alone cannot create enough lift with that low power setting.