-64- POWER CURVES FOR PRATT AND WHITN"E.’Y  ENGINE MODEL IIR-1340-AN-2.  AT 1500 FT . ALTITUDE  Fig.  XXII  R. P.M .  2200  2100  , 1900  700  600  FULL THROTTLE  500  HORSE-POWER  1’100  1600  400  1400  tJj  :;:j  300  ;t>  @ ~  0  ::u  (/.)  t::l  ’1:J  200  0  ~  ::u  100  20  22  24  26  28  30  32  34  36  38  40  ABSOLU’l’E MANIFOLD PRESSURE, IN. HG. 