HGM-25A Titan I

Early American intercontinental ballistic missile / From Wikipedia, the free encyclopedia

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The Martin Marietta SM-68A/HGM-25A Titan I was the United States' first multistage intercontinental ballistic missile (ICBM), in use from 1959 until 1962. Though the SM-68A was operational for only three years, it spawned numerous follow-on models that were a part of the U.S. arsenal and space launch capability. The Titan I was unique among the Titan models in that it used liquid oxygen and RP-1 as propellants; all subsequent versions used storable propellants instead.

Quick facts: Function, Manufacturer, Country of origin, Co...
Titan I
Launch of a Titan I SM/567.8-90 ICBM
from Cape Canaveral, Florida
ManufacturerMartin Company
Country of originUnited States
Cost per launch$1.5 million
Height31 m (102 ft)
Diameter3.05 m (10.0 ft)
Mass105,140 kg (231,790 lb)
Launch history
Launch sitesCape Canaveral LC-15,
LC-16, LC-19, LC-20
Vandenberg AFB OSTF SLTF LC-395
Total launches70 (suborbital)
Success(es)53 (suborbital)
Failure(s)17 (suborbital)
First flight6 February 1959
Last flight5 March 1965
First stage
Engines1 LR87-AJ-3
Thrust1,900 kN (430,000 lbf)
Specific impulse290 seconds
Burn time140 seconds
Second stage
Engines1 LR91-AJ-3
Thrust356 kN (80,000 lbf)
Specific impulse308 seconds
Burn time155 seconds

Originally designed as a backup in case the U.S. Air Force's SM-65 Atlas missile development ran into problems, the Titan was ultimately beaten into service by Atlas. Deployment went ahead anyway to more rapidly increase the number of missiles on alert and because the Titan's missile silo basing was more survivable than Atlas.

The succeeding LGM-25C Titan II served in the U.S. nuclear deterrent until 1987 and had increased capacity and range in addition to the different propellants.