SR 71 probably could do 80000 feet, had titanium skin
altitude only makes things worse
Mike Wryley
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- Member since May 24th 2016
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Posts by Mike Wryley
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Supersonic usually implies smaller wings, cross sections, higher take off and landing speeds
consequently longer runways, many airports are already area bound,
more economic and physical reasons than regs -
methinks that if you could make a significant bomb out of nickel powder and H, it would be common knowledge by now
looking for feedback on reliable and accurate N detectors, and at what energy/flux should one become concerned about renegade neutrons ?
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Argon,
the less you beat up the air, the more efficient the propulsion, hence high bypass turbofanssupersonic may seem glamorous, but then you drastically limit the number of available airports
lastly, interesting tidbit, the ultimate speed of the SR 71 was limited by the impact air temp on the
engine's fan face -
Argon, ( almost bedtime, don't need a critique on my math)
quick swag, assume big high bypass turbofan , 100,000 lb thrust
at 400 mph, 1 lb thrust about 1 hp
for 100k lb thrust you will need another 200,000 hp for the compressor,
guessing that's about 220 MW total
to get efficiency required, need to get the delta T to 700-750 C for the working fluid (air)
hard part would be a heat exchanger with low weight, size, and internal drag for airborne appsif certain parties ever deliver so called "hot tube" technology, however, ground based gas turbines using only air for a working fluid would be "YUGE", and you could use the waste heat for other industrial processes