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Old 23rd Nov 2009, 14:41
  #53 (permalink)  
south coast
 
Join Date: Mar 2001
Location: UK
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Fuzzy said,

'For the sake of correctness, jet engines make thrust, propellor engines make power.'

Does a turbo-fan engine not produce 'power' which is harnessed and used to turn a fan?

Both turbo-fans and turbo-props have their power turbines connected to either a fan or a prop both of which accelerate air backwards pruducing thrust, however a turbo-fan engine also produces thrust (more than a turbo-prop will/can) by means of accelerating air through its core.

Q. How do you get a certain 'thrust' value on a turbo-prop?

A. By setting a specific Torque setting.

Q. How do you get a certain 'thrust' value on a turbo-fan?

A. By setting an specific N1 or EPR setting.

The principle is the same, its just a different method of measuring a value which gives a certain amount of thrust.

Its all getting a but pointless though, but to make a statement about someones ability to instruct and/or fly safely on the basis of a comment posted on here actually shows more about your ability or lack there of to put in into perspective what posting on here is about.
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