Wuzak, on 12 Oct 2015 - 03:07, said:
The SR-71 had turbojets, not ramjets.
So yes, engines SR71, a combined cycle engines .. to take-off and less than one Mach a turbine engine plays an essential role, but above the speed second element of this combination, which is a ram-jet engine (the tube that flows air) begins to play a dominant role speeds above Mach 3, giving it 82% of the total during what has at its disposal the plane. that is, if we gave up at that speed at all of the turbine engine, this string would only decreased by 18%. I think that on threads loss in our application we can afford and get rid of at all of this very complicated and expensive engine components SR 71. we are left only ram-jet, and he will be with an efficiency of about 95% at the speed .This is written in the NASA study concerning the second combined cycle Ramjet engine of the rocket engine .. rocket engine ..
https://en.wikipedia.org/wiki/File:S...w_Patterns.svg
http://www.nowy4suw.republika.pl/sr71%20naped.pdf
http://ntrs.nasa.gov/archive/nasa/ca...0110013567.pdf
https://smartech.gatech.edu/bitstrea...aa_96-2688.pdf
But for our purposes of energy production should be enough speed less than 1 mach. Well, here the helicopter, which must be produced from 100KW power to fly ..
https://www.youtube.com/watch?v=evjd...ature=youtu.be
Except that I would not advise that a helicopter to fly .. but the current can do safely
Andrew
