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Specification	Scout X-4 Vought × remove	Proton K/DM-2 Khrunichev State Research and Production Space Center × remove
Flights	12	110
Success rate	91.7%	93.6%
Thrust	513 kN	—
Height	25 m	—
Diameter	1.01 m	—
Launch mass	17 t	—
LEO capacity	103 kg	—
GTO capacity	—	—
Launch cost	—	—
Reusable	No	No
Stages	4	—

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