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.
Location. 28° 36.625′
Other nearby markers. At least 8 other markers are within walking distance of this marker. RL-10 Engine (here, next to this marker); Brevard County Clerk of the Circuit Court & Records Building (within shouting distance of this marker); The Pritchard House (within shouting distance of this marker); St. Gabriel's Episcopal Church (within shouting distance of this marker); Historic Brevard County Courthouse (about 300 feet away, measured in a direct line); Brevard County World War I Memorial (about 300 feet away); North Brevard County Veterans Honor Roll (about 300 feet away); Brevard County Courthouse (about 300 feet away). 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 January 15, 2021. It was originally submitted on January 10, 2021, by Brandon D Cross of Flagler Beach, Florida. This page has been viewed 39 times since then. 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.