// ORBITAL LOGISTICS AND PROPULSION TERM
Burn Rate
Burn rate is the speed at which a rocket's solid propellant burns or liquid propellant is consumed, affecting thrust and burn duration.
TECHNICAL DEFINITION
Burn rate refers to the linear regression rate at which a solid propellant surface recedes during combustion, or the mass flow rate at which liquid propellants are consumed in a rocket engine, directly influencing the thrust profile and total impulse generated.
BACKGROUND
The fuel economy in aircraft is the measure of the transport energy efficiency of aircraft. Fuel efficiency is increased with better aerodynamics and by reducing weight, and with improved engine brake-specific fuel consumption and propulsive efficiency or thrust-specific fuel consumption. Endurance and range can be maximized with the optimum airspeed, and economy is better at optimum altitudes, usually higher. An airline efficiency depends on its fleet fuel burn, seating density, air cargo and passenger load factor, while operational procedures like maintenance and routing can save fuel.
READ MORE ON WIKIPEDIASYNONYMS & ALIASES
- Propellant consumption rate
- Regression rate
- Fuel consumption
- Thrust rate
USAGE NOTE
Engineers carefully design the burn rate of solid rocket motors to achieve specific thrust profiles.
DEVELOPERS
Organizations developing technology related to Burn Rate.
A leading manufacturer of rocket propulsion systems, including the RS-25 engines for NASA's Space Launch System. The company specializes in designing engines with highly specific and reliable burn rates for both liquid and solid propellants, crucial for mission success.
Designs and manufactures the Merlin and Raptor rocket engines. A key technological innovation is the ability to deeply throttle these engines, which involves precisely controlling the propellant flow and burn rate in real-time to achieve powered landings and reuse of rocket boosters.
Developer of the BE-3 (liquid hydrogen) and BE-4 (liquefied natural gas) engines. The BE-4 is a high-performance, reusable engine where the design and control of its combustion process and burn rate are critical for powering heavy-lift launch vehicles like New Glenn and Vulcan.
Manufactures the Rutherford engine, which uniquely uses electric pumps to feed propellant. This technology allows for extremely precise control over the propellant flow rate, directly managing the engine's burn rate and thrust, which is essential for placing small satellites into precise orbits.
A major producer of solid rocket motors (SRMs), such as the boosters for NASA's SLS. In SRMs, the burn rate is pre-determined by the propellant's chemical composition and the physical shape of the propellant grain, a technology they have perfected over decades.
A specialized American rocket engine manufacturer that designs and sells propulsion systems to various aerospace companies. Their business is centered on developing engines with optimized performance characteristics, where achieving the target burn rate and efficiency is a primary design goal.
A joint venture between Airbus and Safran, this European company develops the Ariane launch vehicles and their engines, such as the Vulcain 2.1. Their research and development focuses on optimizing engine combustion and propellant consumption (burn rate) to maximize payload capacity.
Utilizes large-scale 3D printing to manufacture its rockets and Aeon engines. This additive manufacturing approach allows for novel designs of engine components like injectors and combustion chambers, which directly influence the efficiency and stability of the propellant burn rate.