U42

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DNFR-1

U42 6 comments

hidden message

U42 0 comments

realistic tpt planet

U42 0 comments

silicon screen attempt idk

U42 4 comments

Improved nuclear fusion warhead

U42 0 comments

NSWR like rocket

U42 0 comments

random dwarf planet

U42 1 comments

Instant heat conductor

U42 1 comments

RSST rocket engine

U42 1 comments

Oil NTR

U42 0 comments

Deuterium star collapse

U42 0 comments

Simple NTR

U42 0 comments