[NZtyphoon]

The worst case scenario means here a Rotol propeller and CoG behind the aft limit for that configuration, like in the NACA tested Spitfire.

Originally Posted by Crumpp

Instead of just being smart and making rolleyes how about proving, with documentation, that this statement is incorrect. Prove that you are not making a worst-case scenario out of just two documents: Prove that the Spitfire had such bad longitudinal stability characteristics that it affected its abilities in general flight and in combat and, above all PROVE that this can be replicated in a flight sim made for PCs.