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...
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 said:That's gotta be a typo. 40.9km/sec exhaust velocity? Pull the other one.
Simon666 said: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 said:That's gotta be a typo. 40.9km/sec exhaust velocity? Pull the other one.
Equivalent velocity, sometimes called equivalent exhaust velocity = Isp * g0sferrin said:"exhaust velocity" is not the same as isp.