Engine Power

Question 1

1 horsepower is ___ ft lbs over ___ second(s)

Answer 1

550 ft lbs over 1 second

Question 2

The power developed inside of the cyclinders is called ___ horsepower

Answer 2

indicated

Question 3

____ horsepower means the accumulated losses that increase with RPM

Answer 3

Friction

Question 4

Brake horsepower is an ____ horsepower minus ____ horsepower

Answer 4

indicated friction

Question 5

Brake horsepower is used when the ____

Answer 5

method of determining the power is important

Question 6

Shaft horsepower is the equivalent of ____ from a ____ engine

Answer 6

thrust turboprop

Question 7

Thrust horsepower is the equivalent of ___ from a ___ engine

Answer 7

thrust jet

Question 8

Piston engines use ___ horsepower

Answer 8

brake

Question 9

Turboprops use ___ horsepower

Answer 9

shaft

Question 10

Turboprops convert ___ horsepower into thrust using the propeller

Answer 10

shaft

Question 11

THP =

Answer 11

(Thrust (lbs) x Velocity ) / 550

Question 12

Thrust horsepower will always be ___ than BHP

Answer 12

less than

Question 13

Equivalent Shaft Horsepower refers to turboprop engines which develop a small amount of ____ added to shaft horsepower.

Answer 13

jet thrust

Question 14

BHP is considered to be ___ for all speed ranges

Answer 14

constant

Question 15

BHP is a combination of ___ and ___-

Answer 15

RPM manifold pressure

Question 16

Propeller efficiency is ___ divided by ___

Answer 16

THP BHP

Question 17

Derating provides ___, though its actual purpose is ___

Answer 17

Power reserve in emergency, better match engines and transmissions at altitudes or provide a wider range of altitudes where they can work together

Question 18

Indicated Horsepower =

Answer 18

( MEP (PSI) x Stroke (ft) x Piston Area (ins^2) x Number Cylinders x Working Strokes per minute ) / 33000

Question 19

The Indicated Horsepower formula for muti-cylinder engine displacement is =

Answer 19

Piston Area x Stroke x # Cylinders