Stability and Control characteristics of the Early Mark Spitfires

[JtD]

Originally Posted by Crumpp

The other part is that they do say the airplane is unstable.

NACA says: "... the small static longitudinal stability of the Spitfire...". Not unstable...it's there in black and white, first sentence of the relevant paragraph. And, again, the stick force gradient and the elevator angle gradient were both found to be positive.