Pman

We have our own internal dev tools to monitor such things. The HUD as well as the internal cockpit guage shows IAS. Kind Regards Pman

Hiya, The reference data you posted is part of our data source for the P-40F. I believe you are using the airspeed reading from the speedo in the cockpit which is indicated airspeed vs TAS. 350mph TAS is around 290 IAS Running a test here with the engine running 1080 BHP and 2650 RPM I'm achieving 324/325mph TAS. At 12800ft and 1240BHP and 3000RPM I am achieving 351mph TAS This is representative of the data you are quoting. Kind Regards Pman

Best practise is to put them down in stage one, then give it a short while to stabilise, then 2 then 3 and then 4 (4 should really only be under 150mph ideally) If you deploy them fast (say under 10 seconds between stages and at too high an airspeed) then you will get a fair knock in pitch as the profile of the wing has changed rapidly

One of the purposes of introducing the longer tail variant of the P-40F vs the short tail P-40F was pitch stabilisation. This is a true to life effect of the aircraft. It's not an auto trim but a very stable aircraft when established.

Aerodynamic effects of moving the control surfaces including the flaps are directly connected to the physical position of the surface in question. They deploy quickly so the effect is quick in its application, the key here is what speed you are deploying the flaps at, if you deploy them very fast then the effect will be enhanced by the CFD

This is fixed internally - will be included in a future patch