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I need some advice

Eli Phillips
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Socraticat

Socraticat

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Liquid boosters on the sides. Size depends on what you intend to do with the craft. If it's just LKO you want, then I'd have boosters just large enough to take me out of the atmosphere, with enough dv left on the main vehicle to circularize orbit.

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Timbo

Timbo

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Keep adding additional liquid tanks and engines until your thrust is around 1.8.  If it's higher than that, add tanks without engines, which will increase DV

Provide a pic lower down that shows the engines, as well as TWR from the engineers report.

Also, what is with the shorter stack on the left? Is that payload or lifter?  Don't forget that hydrogen engines suck for liftoff. They are made for vacuum

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