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SVTPerformance's Chain of Restaurants
Road Side Pub
More SR71 coolness
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<blockquote data-quote="James Snover" data-source="post: 16203220" data-attributes="member: 67454"><p>One last bit: at 80,000 feet, the atmospheric pressure is about 0.5psi. 1/2 pound per square inch. And it is (generally) -60F.</p><p></p><p>The only way to get work ( for example, make an airplane fly) out of air is to put energy (heat) into it.</p><p></p><p>The inlets, with those spikes, captured the supersonic shockwave of the air the plane had to push out of its way, shoved it down the throat of the intake, and decelerated the air to subsonic speeds.</p><p></p><p>In the process, that produced 45psi at 950F at the face of the engine! Those spikes let you reclaim what you otherwise had to push out of the way, and with engines in full afterburner STILL developed 45psi and 1,100 degrees of heat! That jump in pressure and temperature is what let the Blackbird do what it did: fly in continuous afterburner for hours on end.</p><p></p><p></p><p>Sent from my iPhone using svtperformance.com</p></blockquote><p></p>
[QUOTE="James Snover, post: 16203220, member: 67454"] One last bit: at 80,000 feet, the atmospheric pressure is about 0.5psi. 1/2 pound per square inch. And it is (generally) -60F. The only way to get work ( for example, make an airplane fly) out of air is to put energy (heat) into it. The inlets, with those spikes, captured the supersonic shockwave of the air the plane had to push out of its way, shoved it down the throat of the intake, and decelerated the air to subsonic speeds. In the process, that produced 45psi at 950F at the face of the engine! Those spikes let you reclaim what you otherwise had to push out of the way, and with engines in full afterburner STILL developed 45psi and 1,100 degrees of heat! That jump in pressure and temperature is what let the Blackbird do what it did: fly in continuous afterburner for hours on end. Sent from my iPhone using svtperformance.com [/QUOTE]
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