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Aerospace Engineering: Introduction to Propulsion

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Aerospace Engineering: Introduction to Propulsion

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Questions and Answers

What is the net work done by the complete cycle in a reciprocating engine?

Wpower stroke - Wcompression stroke (correct)
Wpower stroke / Wcompression stroke
Wpower stroke * Wcompression stroke
Wpower stroke + Wcompression stroke

What is the power output of a reciprocating engine directly proportional to?

Piston diameter
Work done per unit time (correct)
Number of cylinders
Engine rpm

What is the formula for the power available (PA) for a propeller-driven airplane?

PA = η𝜂mech (rmp) NW (correct)
PA = η𝜂mech (n/2) NW
PA = η𝜂mech IP
PA = η𝜂mech NW

What is the relationship between the number of complete engine cycles and the engine rpm?

The number of complete engine cycles is equal to the engine rpm/2 (A) Signup and view all the answers

What is the formula for the volume swept by the piston?

(πb2/4)s (C) Signup and view all the answers

What is the term for the length of the piston movement?

Stroke (D) Signup and view all the answers

What is the purpose of the compression stroke in a reciprocating engine?

To compress the air-fuel mixture (D) Signup and view all the answers

What is the relationship between the engine rpm and the power available (PA) for a propeller-driven airplane?

The power available is directly proportional to the engine rpm (C) Signup and view all the answers

What is the purpose of the power stroke in a reciprocating engine?

To generate power (A) Signup and view all the answers

What is the formula for the shaft brake power (P) in a reciprocating engine?

P = ηmech IP (C) Signup and view all the answers