1. Mean flow pressures f o r a parabolic ogive are computed based on the l i n e a r and nonl inear i t e r a t i v e methods according t o Eqs. (41-17). Figure 4 shows t h a t the r e s u l t s o f the present HPP 1inear method and nonlinear method are i n excellent agreement w i t h those obtained by USSAERO Code ( l i n e a r ) and by exact method o f c h a r a c t e r i s t i c s (Ref. 7). Large discrepency i s found between 1inear and non-1inear results. Next, the nonlinear i t e r a t i v e method i s applied t o an ogivec y l inder-boattail body a t Mach number M,= 3.0 and a t angle o f attack ag= 3.2 O . It i s seen t h a t the present nonlinear r e s u l t s are i n good agreement w i t h those o f the Parabol ized Navier-Stokes (PNS) Code and the Euler Code (Ref. 8). Considerable deviation between the 1inear and the nonlinear r e s u l t s i s shown a t the apex o f the windward side.