q3 - to the momentum that the engine gives the molecules...

Info iconThis preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
Chapter 2, Question 3: Engine Thrust
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
The correct answer is 3) Thrust decreases Since thrust = massflow ( u exit - u o ). When the aircraft starts the takeoff roll u o =0 and at the end of the takeoff roll u o may be an appreciable fraction of uexit. Physically, what is happening is that relative to the engine the molecules coming in have ever increasing momentum and this acts counter
Background image of page 2
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 4
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: to the momentum that the engine gives the molecules (the exit flow). In reference to the PRS question about "rock-breathing" propulsion, it is like having the person on the dock throw the rocks with greater and greater velocity (relative to the boat). Class performance (2004): Chapter 2, Question 3 Answer: Class performance (2003): Class performance (2001):...
View Full Document

This note was uploaded on 01/28/2012 for the course AERO 16.01 taught by Professor Markdrela during the Fall '05 term at MIT.

Page1 / 4

q3 - to the momentum that the engine gives the molecules...

This preview shows document pages 1 - 4. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online