Scout X

Function	Test vehicle
	Vought
	United States
Size
	21.6 metres (71 ft)
	1.02 metres (3 ft 4 in)
	16,700 kilograms (36,800 lb)
Stages	Two
Associated rockets
Family	Scout
	Scout X-1
Launch history
Status	Retired
Launch sites	Wallops LA-3
Total launches	1
Failure	1
	1960-04-18
First stage – Algol 1A
	1 solid
	471 kilonewtons (106,000 lbf)
Specific impulse	236 sec
Burn time	40 seconds
Propellant	Solid
Second stage – Antares 1A
	1 X-254
	60 kilonewtons (13,000 lbf)
Specific impulse	256 sec
Burn time	39 seconds
Propellant	Solid

Scout X, also known as Cub Scout, was an American rocket which served as a prototype of the Scout, which was launched on a single test flight in 1960. It was used to test the configuration that later Scout rockets would use as well as two of the solid rocket motors that would be used on them.

The Scout X had the same configuration as the Scout X-1, which would be the first all-up version of the Scout. Unlike the X-1, which had four live stages, the Scout X only had live first and third stages, with battleship mockups of the second and fourth.

It was launched from Launch Area 3 at the Wallops Flight Facility at 23:09 GMT on 18 April 1960. The launch failed when the rocket disintegrated during stage separation.