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Specification	North American X-15 North American Aviation × remove	Electron Rocket Lab × remove
Flights	13	91
Success rate	92.3%	95.6%
Thrust	286 kN	162 kN
Height	15.47 m	18 m
Diameter	6.61 m	1.2 m
Launch mass	15,195 t	13 t
LEO capacity	—	300 kg
GTO capacity	—	—
Launch cost	—	$6M
Reusable	Yes	No
Stages	1	3

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