Clive,
The report states that, as you earlier mentioned, the practice has long been to use dynamic pressure in structural load calculations. I have no problem accepting that that is the convention.
What I do not understand is why an incompressible solution is used when dealing with ‘speeds’ above Mach 0.3. The idea of basing any calculations on an incompressible formula in the transonic regime is simply baffling to me.
In my foregoing comment I meant for ‘impact pressure’ to be read as ‘total pressure minus static pressure’ (accounting for density varying along the streamline – cf eq 2 in the report and eq 32b in NACA Report 1135.)
Rivet,
No static port on your aeroplane? It’s the static temperature which has traditionally been difficult to measure. The Wiki article Eclipse attached to their application to the FAA would be amusing if it weren’t frightening.