Liquid rocket fuel is better in use because the rocket thrust can be adjusted mid-flight unlike solid rocket fuel that burns at a fixed rate without any mechanism to alter it.
42.
The Delta IV Heavy uses two additional Common Booster Cores ( CBCs ) as liquid rocket boosters instead of the GEM-60 solid rocket motors used by the Delta IV Medium + versions.
43.
:According to our Long March ( rocket family ) article " the main stages and associated liquid rocket boosters use dinitrogen tetroxide as the oxidizing agent and UDMH as the fuel ".
44.
A liquid rocket engine ( LRE ) can be tested prior to use, whereas for a solid rocket motor a rigorous quality management must be applied during manufacturing to ensure high reliability.
45.
All liquid rocket engines have tankage and pipes to store and transfer propellant, an injector system, a combustion chamber which is very typically cylindrical, and one ( sometimes two or more ) rocket nozzles.
46.
An alloy used for liquid rocket thruster nozzles, such as in the main engine of the Apollo Lunar Modules, is C103, which consists of 89 % niobium, 10 % hafnium and 1 % titanium.
47.
Zenit was built in the 1980s for two purposes : as a liquid rocket booster for the Energia rocket and, equipped with a second stage, as a stand-alone up-middle launcher greater than 7-ton payload Proton.
48.
On 4 March 2000, the BA-2 project tested the largest liquid rocket engine built since the Saturn V . In October 2000, Beal Aerospace ceased operations citing a decision by NASA and the EELV program.
49.
From 1949 to his retirement in 1970, Clark developed liquid propellants at the Naval Air Rocket Test Station at Dover, New Jersey ( after 1960, this became the Army's Liquid Rocket Propulsion Laboratory of Picatinny Arsenal ).
50.
During the years that Shainin served as a reliability consultant for Pratt & Whitney Aircraft, he worked on the hydrogen-oxygen fuel cell that powered Apollo environmental life support in addition to the RL-10 cryogenic liquid rocket engine.
