 applic hyperson similar rule pressur distribut includ effect rotat bodi revolut angl attack applic hyperson similar rule pressur distribut includ effect rotat bodi revolut angl attack analysi technic note 2250 1950 extend includ effect flow rotat theoret pressur distribut ogiv cylind hyperson similar rule suffici accuraci engin purpos error introduc pressur distribut drag ogiv cylind ignor rotat term characterist equat investig influenc rotat term pressur distribut drag depend similar paramet mach number divid fine ratio error drag neglect rotat term neglig 0 5 error 30 percent 2 0 chart present rapid determin pressur distribut rotat flow ogiv cylind valu similar paramet 0 5 mach number fine ratio 