Machmeter
I don't deny that the equations for Vc and M which Pugilistic Animus quotes from Old Smokey are right. Your efforts on the subject are both appreciated.
However in the interest of simplicity which I fancy truly exists here seeing:
M= P/S
where M is Mach Number, P is the Dynamic pressure and S is the Static pressure as Lightning Mate says is what I'd been hoping to see(!).
So putting it to the test; if that observant (who ever is not!) pilot in his beaut old Hunter sees Mach 0.898 on his Machmeter his P is 890 mb and his S is 990 mb (mb: millibars, old units, but dont worry). Yes?
But in a faster ship with his Machmeter indicating 1.3 his Dynamic pressure has to be 1287 mb for a Static pressure of 990mb. Is that a fact? How is that ?
Lightning Mate, you've made sterling pointers so far can you show me how P/S is true, too? ( how it is derived?)