ROCKETRY—COX AND STOIKO 281 
With these four new missiles—Honest John, Little John, Dart, 
and LaCrosse—supplementing weapons in this category that have 
been battle proved in the last two wars, the American infantryman 
is assured of the close support required. 
In the medium-range, surface-to-surface category (enemy ground 
targets up to 500 miles), there are the Corporal (the most popularly 
known of this group), the Sergeant, and the Jupiter A (Redstone) 
missiles. 
The Corporal is approximately 45 feet long and 2.5 feet in diameter. 
It weighs about 5 tons fully fueled, and the range is about 150 miles. 
This vehicle is one of the Nation’s first guided missiles. It is radio 
guided, flies a ballistic trajectory after cutoff, and can carry an 
atomic warhead. The missile is currently in large-scale production 
and in full use by the Armed Forces. 
The Sergeant missile, an outgrowth of the Hermes RVA-10, is a 
late addition to the Army’s tactical missile family. It is more than 22 
feet long and 3 feet in diameter. With a launch weight of 25,000 to 
35,000 pounds including the payload, the range of this missile is 
estimated at 50 to 70 miles. ‘Thrust is estimated at 50,000 to 75,000 
pounds. The propulsion system is said to be one of the largest solid- 
propellant motors in development. When this vehicle becomes oper- 
ational, it may replace the Corporal. 
The last vehicle in this series is the Jupiter A, more commonly 
known as Redstone. It is 69 feet long and 6 feet in diameter. The 
range of the vehicle is given as 200 to 250 miles. The Jupiter A 
resembles the V-2 in many respects and is described as the test bed 
for the Jupiter C, in addition to its tactical function. The vehicle is 
powered by a 75,000-pound-thrust, liquid-propellant engine. This 
particular powerplant, although not as efficient as the more modern 
engines, is nevertheless one of the more reliable. It is expected that 
the Jupiter A will become operational shortly. When it does, the 
utilization of this weapon will extend the Army’s striking capability 
well beyond the Army group zone of action. 
As of January 1, 1958, the United States had under development 
five long-range ballistic missiles. Basically they are of two types: 
the shorter-range 1,500-mile intermediate-range ballistic missile 
(IRBM); and the extreme-range 500- to 5,500-mile intercontinental 
ballistic missile (ICBM). Of the five missiles under development, 
three are in the shorter intermediate range, and the other two are in 
the intercontinental range. 
Tn the IRBM class, the Thor is being developed by the Air Force, 
the Jupiter by the Army, and the Polaris by the Navy. 
The Thor, officially designated as the WS-315, is a single-stage 
missile powered by a liquid rocket engine of 135,000-pounds thrust. It 
is claimed that the development of the Thor will serve as a component 
