Читать книгу Flight Theory and Aerodynamics - Joseph R. Badick - Страница 37

POWER

In our discussion of work and energy, we have not mentioned time. Power is defined as “the rate of doing work” or work/time. We know:

and

James Watt defined the term horsepower (HP) as 550 ft‐lb/s:

If the speed is measured in knots, V_k, and the force is the thrust, T, of a jet engine, then