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MARKER DATABASE
“Bite-Size Bits of Local, National, and Global History”
“Bite-Size Bits of Local, National, and Global History”
Huntsville in Madison County, Alabama — The American South (East South Central)
 

Main Engines

Power for Lift-off and Ascent to Orbit

 
 
Main Engines Marker image. Click for full size.
By Sandra Hughes, September 20, 2016
1. Main Engines Marker
Inscription. The Pathfinder’s three main engines are real. The two lower engines powered the first flight of Columbia in 1981. The engine located at the top was used in ground test firings.

At launch, the three Space Shuttle Main Engines (fed liquid hydrogen and oxygen from the External Tank) are ignited several seconds before liftoff.

They operate for approximately 8.5 minutes of flight, drawing about 47,000 gallons of liquid hydrogen and 17,000 gallons of liquid oxygen each minute. Shortly before the shuttle achieves orbit the Main Engines shut down and maneuvering rockets fire to position the Shuttle into its final orbit. Reusable each engine is designed for 7.5 hours of operation or to endure up to 55 starts.

Data Each engine
Length: 14 ft
Diameter: 7.5 ft
Weight: approximately 7000 lbs.
Thrust: 393,800 lbs.
Mix ratio: 6 parts oxygen to 1part hydrogen
Prime Contractor: Rockwell International Rocketdyne Division

 
Location. 34° 42.647′ N, 86° 39.156′ W. Marker is in Huntsville, Alabama, in Madison County. Marker can be reached from Tranquility Base 0.4 miles west of Madison Pike, on the left when traveling west. Click for map. Marker is at or near this postal address: 1 Tranquility Base, Huntsville AL 35805, United States of America.
 
Other nearby markers.
Main Engines Marker image. Click for full size.
By Sandra Hughes, September 20, 2016
2. Main Engines Marker
At least 8 other markers are within walking distance of this marker. External Tank (a few steps from this marker); T-38 Talon (within shouting distance of this marker); Pathfinder (within shouting distance of this marker); Pathfinder Orbiter (within shouting distance of this marker); U.S. Army/NASA Juno II (about 500 feet away, measured in a direct line); NASA/U.S. Geological Survey (about 500 feet away); U.S. Army PGM-11 Redstone (about 500 feet away); Ms. Baker: Monkeynaut (about 600 feet away). Click for a list of all markers in Huntsville.
 
Also see . . .  U.S. Space & Rocket Center. (Submitted on September 22, 2016.)
 
Categories. Air & SpaceMan-Made Features
 
 
Credits. This page originally submitted on , by Sandra Hughes of Killen, Usa. This page has been viewed 173 times since then and 5 times this year. Photos:   1, 2. submitted on , by Sandra Hughes of Killen, Usa. • Bernard Fisher was the editor who published this page. This page was last revised on September 22, 2016.
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