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6th generation engine

Matej

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Writing the article about the 6th generation fighters I couldnt resist and I made a sketch of my vision of the 6th generation engine :)
 

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sferrin

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You seem to have left out the flux capacitor.
 

Nik

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http://www.reactionengines.co.uk/lapcat_scim.html

"This engine is capable of sustained Mach 5 flight whilst achieving an effective exhaust velocity of order 40,900 m/s. In addition the engine has a second operating mode that features a high bypass airflow permitting efficient subsonic flight and moderate take-off noise."
/quote

Yes, this design looks 'familiar but different': It is the cut-down version of SSTO Skylon's Sabre engine, ie minus rocket stuff...
 

sferrin

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Nik said:
http://www.reactionengines.co.uk/lapcat_scim.html

"This engine is capable of sustained Mach 5 flight whilst achieving an effective exhaust velocity of order 40,900 m/s. In addition the engine has a second operating mode that features a high bypass airflow permitting efficient subsonic flight and moderate take-off noise."
/quote

Yes, this design looks 'familiar but different': It is the cut-down version of SSTO Skylon's Sabre engine, ie minus rocket stuff...

That's gotta be a typo. 40.9km/sec exhaust velocity? Pull the other one.
 

shockonlip

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OK, from the cool subject, I was attracted into looking at this.

However, on inspection, was the intention humor?

Some seem to think so and others don't.

Trying to clarify.
 

Matej

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Original post was in the bar, so I think the idea was clear ;) But... the future life of the topic content is sometimes hard to predict.
 

Simon666

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sferrin said:
That's gotta be a typo. 40.9km/sec exhaust velocity? Pull the other one.
A high Isp (10 times higher than hydrogen-oxygen) can also be expressed in a correspondingly higher effective exhaust velocity. Doesn't mean the exhaust is effectively that fast though.
 

sferrin

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Simon666 said:
sferrin said:
That's gotta be a typo. 40.9km/sec exhaust velocity? Pull the other one.
A high Isp (10 times higher than hydrogen-oxygen) can also be expressed in a correspondingly higher effective exhaust velocity. Doesn't mean the exhaust is effectively that fast though.

"exhaust velocity" is not the same as isp.
 

Simon666

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sferrin said:
"exhaust velocity" is not the same as isp.
Equivalent velocity, sometimes called equivalent exhaust velocity = Isp * g0

http://www.grc.nasa.gov/WWW/K-12/airplane/specimp.html
 

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