been doing some more digging on this, mainly trying to be a 'devil's advocate' to punch holes in my theory that the effect as currently modeled is incorrect.
http://naca.central.cranfield.ac.uk/...rc/rm/3365.pdf
is the only thing i've found, and while not conclusive it does show some tests between various types, including a German pitot (HNG). This would appear to show small variations between types but not the variations seen ingame, to me they appear to be of almost an order of magnitude out.
anyone an expert on fluid dynamics here care to look these over?
2 other slightly relevant things i've discovered- spitII had a modified pitot fitted- 'single' tube as compared to the earlier 'forked' type (separate pitot and static tubes mounted parallel )
http://spitfiresite.com/2010/04/supe...ed-line.html/3
also acceptable tolerance for alignment of pitot head in HurriII is +/-2 deg which seems to fit with errors given in first reference, showing less than 1% difference below ~15 deg of off axis alignment and gross errors only occurring above ~20 deg off axis