LR91-3 Engine
The American Space Museum
The LR91 was an American liquid-propellant rocket engine, which was used on the second stages of the Titan I intercontinental ballistic missiles and launch vehicles. This model offered an average of 105,000 pounds of thrust.
This particular version – the LR91-3 – used refined kerosene for fuel and liquid oxygen as the oxidizer. Because liquid oxygen is cryogenic, it could not be stored in the missile for long periods of time, and had to be loaded before the missile could be launched.
This engine was vacuum optimized and ran the gas generator cycle. The thrust chamber used fuel for regenerative cooling, with a separate ablative skirt. The LR87, which was used for the Titan first stage, was used as a template for the LR91.
The museum’s engine was originally part of a Titan I that sat in front of Titusville High school for many years.
Erected by The American Museum and Walk of Fame Museum.
Topics. This historical marker is listed in these topic lists: Air & Space • Exploration • War, Cold.
Location. 28° 36.625′ N, 80° 48.508′ W. Marker is in Titusville, Florida, in Brevard County. Marker is at the intersection of Pine Street and South Hopkins Avenue (U.S. 1), on
this page online
Other nearby markers. At least 8 other markers are within walking distance of this marker. RL-10 Engine (here, next to this marker); The Legend of the Cresent Moon on the Outhouse Door (within shouting distance of this marker); The Losley - Evans Family Garden (within shouting distance of this marker); The Nelson Family Garden (within shouting distance of this marker); The “Olde Dawgs” Story (within shouting distance of this marker); The Benecke Family Garden (within shouting distance of this marker); Brevard County Clerk of the Circuit Court & Records Building (within shouting distance of this marker); The Happy Creek Garden (within shouting distance of this marker). Touch for a list and map of all markers in Titusville.
Also see . . . LR91 Engine. (Submitted on January 10, 2021, by Brandon D Cross of Flagler Beach, Florida.)
Credits. This page was last revised on July 12, 2021. It was originally submitted on January 10, 2021, by Brandon D Cross of Flagler Beach, Florida. This page has been viewed 188 times since then and 20 times this year. Photos: 1, 2. submitted on January 10, 2021, by Brandon D Cross of Flagler Beach, Florida. • Devry Becker Jones was the editor who published this page.
