@Erdayastronaut @TJ_Cooney @lrocket @SpaceX @FelixSchlang @MarcusHouseGame He became a big fan of methane, but was not pushing it initially. That came from me reading about Soviet methane engine tests that got over 380 Isp. At that Isp, a subcooled methane stage gets slightly better delta-V than a hydrogen stage.

@Erdayastronaut @TJ_Cooney @lrocket @SpaceX @FelixSchlang @MarcusHouseGame He became a big fan of methane, but was not pushing it initially. That came from me reading about Soviet methane engine tests that got over 380 Isp. At that Isp, a subcooled methane stage gets slightly better delta-V than a hydrogen stage.

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@ErcXspace @smvllstvrs T/W will be ~1.5, so it will accelerate unusually fast. High T/W is important for reusable vehicles to make more efficient use of propellant, the primary cost. For expendable rockets, throwing away stages is the primary cost, so optimization is low T/W.

@ErcXspace @smvllstvrs T/W will be ~1.5, so it will accelerate unusually fast. High T/W is important for reusable vehicles to make more efficient use of propellant, the primary cost. For expendable rockets, throwing away stages is the primary cost, so optimization is low T/W.

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