FHP
Friction horsepower. The amount of horsepower used to turn the crankshaft, pistons, gears, and accessories in a reciprocating engine and to compress the air inside the cylinders.
Aviation Maintenance Technician Handbook — Powerplant, p. G-12
Friction horsepower. The amount of horsepower used to turn the crankshaft, pistons, gears, and accessories in a reciprocating engine and to compress the air inside the cylinders.
Aviation Maintenance Technician Handbook — Powerplant, p. G-12