Aircrafts: Fw190 series
The issue is the overdone and not physical correct leftspin caused by engine torque.
All Fw 190 do have this Problem. At 0% throttle there is no leftspin, because there can be no engine torque. When increasing the throttle the plane starts banking left.
It banks to the left so hard, that the 190s left wing tends to touch the runway on takeoff. To fly a straight line after takeoff you constantly have to hold your joystick to the right about 15% for right aileron.
This overdone engine torque happens at all speeds and rpm until you throttle down to 0%. I noticed the leftspin decreasing at 50% of throttle downwards. The hardest level of leftspin is at 100% + WEP.
How to fix that...
Engine torque do have an effect on the plane at very high throttle and low speed. Like on a takeoff.
If the speed increases, the airflow over the wings and tail rises and stabilize the plane. At a point of 300 km/h there shall be no noticeable leftspin caused by engine torque.
So engine torque do only have an effect on takeoff, in most of the cases. Even on takeoff the spin to the left is so slightly that you can easily compensate it with a bit of right rudder.
So what to do, to fix that, is to reduce this leftspin massively.
To underline my position i can provide what Eric Brown wrote about the Fw190, as he tested it. He wrote down a lot of his detailed experiances in a book called berühmte Flugzeuge der Luftwaffe - Wings of the Luftwaffe.
Source to Eric Brown: https://en.wikipedia.org/wiki/Eric_Brown_(pilot)
Thats something very hard to proof, that this leftspin is not correct yet. Not because the book is in german language, it´s that only pilots who really flew this aircraft can tell you that it is wrong.
So i translate what Eric Brown has written down there....
While takeoff: " I could notice a light turn to the left, what can be easily compensate with the rudder. "
Thats all he wrote down about a leftspin to the Fw190.
Honestly, who has flewn the Fw190 in game and noticed this hard spin, can guess that this cant be a real thing when it´s nearly not possible to fly a straight line without breaking your wrist when playing a few hours.
I really did my best to proof, that this is an issue, where you guys please should have a look on. I also spent a lot of time to report and meet your requirements .
Thanks for reading.