Steve Jackson Games Forums - View Single Post

AlexanderHowl · 06-12-2019, 05:30 PM

They do not use it right now because we do not have the technology to support it because we are not that great when it comes to space, not because it is impossible. Anyway, there have been experimental LOX/LH2 designs (the old RL10B-X) that have gotten an ISP of 470 (back in the 1960s), so I am not sure that an ISP of 486 is impossible if the technology was improved upon (the maximum possible for LOX/LH2 is 528 at 100% efficiency).

06-12-2019, 05:30 PM	#27
AlexanderHowl Join Date: Feb 2016	Re: Approaching TL9? They do not use it right now because we do not have the technology to support it because we are not that great when it comes to space, not because it is impossible. Anyway, there have been experimental LOX/LH2 designs (the old RL10B-X) that have gotten an ISP of 470 (back in the 1960s), so I am not sure that an ISP of 486 is impossible if the technology was improved upon (the maximum possible for LOX/LH2 is 528 at 100% efficiency).