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Excuse me!!! (Read 354 times)

Nov 7^th, 2004 at 9:24am

jrpilot Offline
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But how do Turbojets and Turboprops work?...Does the thrust somehow bounce of the air? I really don't understand.... Undecided

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Reply #1 - Nov 7^th, 2004 at 12:20pm

born_2_fly Ex Member

Can you be more specific, how do you mean? How do the engines produce the trust or how it has an effect on the air to produce forward movement?

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Reply #2 - Nov 7^th, 2004 at 1:09pm

OTTOL Offline
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Fintas, Kuwait (OKBK)

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http://en.wikipedia.org/wiki/Jet_engine

A turboJET has a single inlet and exhaust and uses compressed, heated air to push the airplane through the air

A turboFAN- is a turboJET that is atached to a large internal fan. It uses a combination of thrust from the Jet and the Fan. The large blades that you see at the inlet of most modern jets are the "driven" fan. Ambient(temperature) air is driven through the outer(bypass) section of the engine. ( in fact when a turboFAN is running you can safely hold your hand behind the outer exhaust flow!)

A turboPROP- is a jet engine that drives a conventional propellor. It is atached to the prop either by connecting it's center shaft to a gearbox(which turns the propellor) or by harnessing the fast moving exhaust gas to drive another impeller(there is no mechanical attachment!) which, in turn, drives a propellor.

.....so I loaded up the plane and moved to Middle-EEEE..........OIL..that is......

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Reply #3 - Nov 11^th, 2004 at 4:32pm

chomp_rock Offline
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I must confess, I was
born at a very early
age.

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And they work on the principle of this most important law: Every action has an equal and opposite reaction.

AMD Athlon 64 3700+&&GeForce FX5200 256Mb&&1GB DDR400 DC&&Seagate 500Gb SATA-300 HDD&&Windows XP Professional X64 Edition&&&&That's right, I'm now using an AMD! I decided to give them another try and they kicked the pants off of my P4 3.4!

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Reply #4 - Nov 11^th, 2004 at 6:21pm

Tequila Sunrise Offline
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Nunquam non paratus
Glasgow Scotland

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The Vernoulii effect causes thrust taken in one end to be accelerated and lowwered in preasure V1<V2 & P1>P2. This i caused by intake air entering into a funnel, the same volume of air being taken into the intake must pass through a narrow channell and achieves this by accelerating, this air is then ignited and expands rappidly, it is then expelled through the exhaust whilst trying to expand causing it to push against the free stream air.

I should probably rewrite that as it aint worded too well but I'm off to bed Roll Eyes

Craig 8)

If someone with multiple personality disorder threatens suicide, is it a hostage situation?

Thou shalt maintain thine airspeed lest the ground shalt rise up and smite thee

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Reply #5 - Nov 11^th, 2004 at 6:45pm

Nexus Offline
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The greater of two evils...

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His name was Bernoulli btw (You just spelled the name worng, no biggie)

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Reply #6 - Nov 11^th, 2004 at 10:09pm

Rocket_Bird Offline
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Canada

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Like what OTTOL said.

A turbojet consists of simply compressing air and accellerating that air back the exaust. As Force equals mass times accelleration, the more air you accellerate, the more force (thrust) you will have. Also you can think of it as a balloon, letting all that air out the back gives you a force at the front of the balloon pushing it forward.

A turbo prop works on a similar principle, still compresses air, but the energy you have you use to drive a propeller giving you longitudinal thrust through the use of airfoils

Cheers,
RB

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