Encyclopedia Astronautica
X-248


Thiokol solid rocket engine. 12.4 kN. Isp=256s. Used on Atlas Able, Blue Scout 2, Caleb, Delta, Delta A, Delta B, Delta C. First flight 1959.

Thrust (sl): 11.300 kN (2,540 lbf). Thrust (sl): 1,156 kgf.

AKA: Altair 1; X-248.
Gross mass: 238 kg (524 lb).
Unfuelled mass: 30 kg (66 lb).
Height: 1.83 m (6.00 ft).
Diameter: 0.46 m (1.50 ft).
Thrust: 12.40 kN (2,788 lbf).
Specific impulse: 256 s.
Specific impulse sea level: 233 s.
Burn time: 38 s.
Number: 51 .

More... - Chronology...


Associated Countries
See also
Associated Launch Vehicles
  • Delta American orbital launch vehicle. The Delta launch vehicle was America's longest-lived, most reliable, and lowest-cost space launch vehicle. Delta began as Thor, a crash December 1955 program to produce an intermediate range ballistic missile using existing components, which flew thirteen months after go-ahead. Fifteen months after that, a space launch version flew, using an existing upper stage. The addition of solid rocket boosters allowed the Thor core and Able/Delta upper stages to be stretched. Costs were kept down by using first and second-stage rocket engines surplus to the Apollo program in the 1970's. Continuous introduction of new 'existing' technology over the years resulted in an incredible evolution - the payload into a geosynchronous transfer orbit increasing from 68 kg in 1962 to 3810 kg by 2002. Delta survived innumerable attempts to kill the program and replace it with 'more rationale' alternatives. By 2008 nearly 1,000 boosters had flown over a fifty-year career, and cancellation was again announced. More...
  • Atlas Able American orbital launch vehicle. Atlas with upper stage based on Vanguard second stage. More...
  • Caleb American air-launched orbital launch vehicle. Heavily classifed project related to air-launched ASAT development. Launch tests in 1958. NOTS project staff believed they successully orbited a satellite but unconfirmed. More...
  • Blue Scout 2 American all-solid orbital launch vehicle. Air Force version of Scout used for suborbital and orbital military tests. More...
  • Delta A American orbital launch vehicle. Three stage vehicle consisting of 1 x Thor DM-21 + 1 x AJ10-118 + 1 x Altair More...
  • Delta B American orbital launch vehicle. Three stage vehicle consisting of 1 x Thor DM-21 + 1 x AJ10-118A + 1 x Altair More...
  • Delta C American orbital launch vehicle. Unaugmented Thor with Delta D and solid propellant upper stages. More...

Associated Manufacturers and Agencies
  • Thiokol American manufacturer of rocket engines and rockets. Thiokol Corporation, Ogden, UT, USA. More...

Associated Propellants
  • Solid Solid propellants have the fuel and oxidiser embedded in a rubbery matrix. They were developed to a high degree of perfection in the United States in the 1950's and 1960's. In Russia, development was slower, due to a lack of technical leadership in the area and rail handling problems. Solid propellants have the fuel and oxidiser embedded in a rubbery matrix. They were developed to a high degree of perfection in the United States in the 1950's and 1960's. In Russia, development was slower, due to a lack of technical leadership in the area and rail handling problems. More...

Associated Stages
  • Altair 1 Solid propellant rocket stage. Loaded/empty mass 238/30 kg. Thrust 12.45 kN. Vacuum specific impulse 256 seconds. More...
  • Caleb-2 Solid propellant rocket stage. Loaded/empty mass 267/23 kg. Thrust 13.78 kN. Vacuum specific impulse 254 seconds. More...

Home - Browse - Contact
© / Conditions for Use