Info

and rocket

and ram/scram

ram/scram

Category

first

first

second

fourth

third

fifth

sixth

SSTO mass ratio (LEO)

8.0 to 9.0

6.5 to 7.5

5.0 to 6.2

5.0 to 5.5

4.0 to 5.4

3.2 to 4.2

2.5 to 3.5

Airbreathing speed

0 0

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