Updated RAF FMs in 1.07.18301

[Crumpp]

the problem with post war studies are precisely that, they are post war.

The NACA study was not post war....

The RAE Operating Notes warnings were not post war.....

Gates attempts to get the RAE on a measureable standard were not post war.....

He wrote over 130 papers during his career on stability and control. A significant portion of them were written during the war attempting to convince his colleagues at the Air Ministry to adopt measureable standards.

In fact, Gates stability margin criteria were part of the NACA's standards!!! Gates developed the "Aerodynamic Center" which would replace the obsolete "center of pressure".

All of Gates findings agreed with the NACA's conclusions!

He and Gilruth were good friends. In his 1942 visit to the NACA, Gilruth hosted Gates.

One of his sources for the development of the following table is the basis of the NACA standards!!

Gilruth . .Requirements for Satisfactory Flying Qualities of Airplanes•
N.A.C.A. Advance Report A.R'.C. 5543.

Just as a chart of speed or climb performance shows us how the aircraft should perform, the plots of acceleration forces over velocity tell us how the aircraft performs in abrupt maneuvers.

For satisfactory stability and control, a pilot is able to precisely control the accelerations on the aircraft.

This is not what the plots show for the Spitfire. The accelerations vary wildly as the pilot is unable to precisely control them.