Arugela Posted March 6 Share Posted March 6 (edited) Normally you hear around 1700isp. What if it is combined with liquid air or LOX and used with an airospike and or any form or ramjet/scramjet to increase the ISP? Edited March 6 by Arugela Quote Link to comment Share on other sites More sharing options...
mikegarrison Posted March 6 Share Posted March 6 Of course the main issue is that metallic hydrogen may not even exist. But the reason hydrogen has the potential for a high ISP is because it is the lightest atom. Any other atoms added to the reaction mass will only lower the ISP if they are also carried onboard. If they are drawn from outside (ramjet, etc.) then yes ... but that obviously only works in the atmosphere and has so many other problems that it has never been done except for "Stage 0" of air-launched rockets. Quote Link to comment Share on other sites More sharing options...
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