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The big thing about podded engines is the cowl drag. This was seen in the NASA HRE (Hypersonic Research Engine) program.

http://hapb-www.larc.nasa.gov/Public/Engines/Hre/Hre.html. Net thrust was not positive.


What way do you propose to store H2? If you don't go cryo/slush then how to you make up the heat sink?


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