Stability and Control characteristics of the Early Mark Spitfires

[NZtyphoon]

Originally Posted by Crumpp

Once again, a standard is a standard. The Air Ministry and the RAE did not have one.

The United States had a standard during the war. That does not mean every airplane met that standard. Most aircraft were designed before the standard was adopted. It does mean, they designed to meet, tested to meet it, and implemented design corrections to meet the adopted standard. Part of that report and standard is included in the very first post in this thread.

The design firms in the United States were obligated to meet a standard. Supermarine was under NO Obligation to correct the Spitfire. It as already in production and service. It took the NACA, Gates, and mounds of evidence of the instability before a simple correction was adopted.

Absolute nonsense, once again Crumpp - you clearly have no clues as to how the British aviation industry operated in wartime. Where is your evidence that Supermarine was under no obligation to correct the Spitfire?

How did NA comply with the "standard" when they fitted the P-51B/C/D with rear fuel tanks, thus turning the machine into one that was highly unstable when the tank was full? Was the "standard" adopted before or after the P-51 was designed; before or after the modifications to the P-51?

How did Grumman correct the undesirable elevator characteristics of the F8F-1 to meet NACA standards? Was the "standard" adopted before or after the F8F was designed?