Comments by "Keit Hammleter" (@keithammleter3824) on "MOST DEADLY: WW2 Fighter Jet - Me 262 - Forgotten History" video.

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  4.  @FORGOTTENHISTORYCHANNEL ; you have made a basic mistake often made by amateur historians - you didn't go back to original sources and you did not take the trouble to understand the technology, or get advice from someone who does. The trouble with Whittle's design was that combustion temperature has to be kept low otherwise the chambers would soften/melt. This meant the compression ratio had to be kept very low and this in turn meant very excessive fuel consumption. That is why the authorities rejected it - it was not worth putting research into because it was known in advance from basic thermodynamic theory that the engine could never be any good. Later, Rolls Royce invented the air-spaced double wall combustion chamber, thus splitting what needed to take high temperature and what needed to have the strength to cope with the reaction pressure. That allowed an increased compression ratio and fuel consumption that was not a total disaster. Not until bypassed turbofans were devised did fuel consumption come close to competing with piston engines. Ohain's first engine (known as the "garage engine"), which was radially compressed like Whittle's, was purely a trial/demonstration, and never intended to be the basis of a ususable engine. It was hydrogen powered to simplify things, and a cursory look at the cross-section drawings of both engines will show that they are completely different. Because Ohain said he was aware of the Whittle patent, people have been saying he copied Whittle, but it's just not true.
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