Brake Horsepower (BHP) BHP usually refers to the amount of power delivered at the engine output shaft of a piston engine. It is measured using an instrument called a dynamometer, which is a mechanical or electric braking device. In the UK system, the horsepower corresponds to the work required to raise a weight of 33,000 lb f, 1 ft in 1 minute.. Brake horsepower (BHP) is a key metric used to express the actual usable power output of an aircraft engine, measured at the crankshaft and adjusted for mechanical losses in the drivetrain. In aviation, BHP informs performance calculations, maintenance practices, and certification considerations. This article explains what brake horsepower means, how it is measured, and why it matters for.
Break Horsepower Chart In historical aviation, brake horsepower (BHP) refers to the actual power output of an engine, measured at the propeller shaft, after accounting for internal engine losses. It's the usable power delivered to the propeller, contrasted with indicated horsepower, which is the theoretical power generated within the engine cylinders.. Brake-Horsepower Charts Another common type of graph you will encounter as a technician is the performance chart. One common performance chart is the brake-horsepower chart. These charts represent many hours of calculation by engineers but are presented so that you can quickly determine if the performance being observed is acceptable.