 analysi applic hyperson similar law studi flow bodi revolut angl attack analysi applic hyperson similar law studi flow bodi revolut angl attack hyperson similar law deriv tsien investig compar pressur distribut bodi revolut angl attack make comparison attent determin limit mach number fine ratio similar law appli purpos investig pressur distribut determin method characterist ogiv cylind valu mach number fine ratio vari 1 5 12 compar pressur cone cone cylind compar studi pressur distribut present demonstr hyperson similar law applic wider rang valu mach number fine ratio expect assumpt deriv rang applic law singl pressur distribut exist shape bodi ratio free-stream mach number fine ratio constant chart present rapid determin pressur distribut ogiv cylind combin mach number fine ratio defin limit 