Question

Which of the following statement is correct?

(a) Thrust power delivered by an aircraft engine is always less than shaft power delivered

(b) Thrust power delivered by an aircraft engine is always more than shaft power delivered

(c) Thrust power delivered by an aircraft engine is directly proportional to shaft power delivered

(d) Thrust power delivered by an aircraft engine is inversly proportional to shaft power delivered

The question was asked in a job interview.

The question is from Power Producing Power Plant in portion Aircraft Force Systems and the Equations of Motion of Aircraft Performance

Answer 1

Right answer is (a) Thrust power delivered by an aircraft engine is always less than shaft power delivered

Explanation: The thrust power delivered by an aircraft engine is always less than shaft power delivered. This is because in a power-producing engine the shaft power have to be converted into thrust during which there occur losses and hence the thrust power delivered by an aircraft engine is always less than shaft power delivered.