Rockets
Popular with customers, this recent rocket has reduced the cost of space travel significantly.
Falcon 9
Despite being very inefficient it is a very reliable cycle.
Gas Generator Cycle
Visible with the naked eye during the night, this legendary space station has been occupied for over 20 years.
The International Space Station
Created in 2006 the version of the engine being used today is over twice as powerful and efficient as the original.
SpaceX's Merlin Engine
NASA's Landsat
Commonly confused with the spacecraft of the same name, this rocket has been in service for decades.
Союз
Fairly efficient this cycle is commonly used in Soviet era engines
Oxygen rich staged combustion cycle
Infamous for its delays and cost overruns, this new space telescope was FINALLY launched on Christmas day 2021.
The James Webb Space Telescope
Used for 60 years this extremely reliable engine has been used over 700 times.
Aerojet Rocketdyne's RL-10 engine
The Delta rocket
Often delayed this mega rocket is finally ready for launch later this month.
SLS or Space Launch System
Commonly overlooked this engine cycle was used on the space shuttle for decades.
Fuel rich staged combustion cycle
Despite being designed to last for 90 Martian days, these 2 rovers lasted significantly longer than anyone anticipated.
Spirit and Opportunity
Despite being used on the N1 rocket, this engine had enormous potential.
NK-15/NK-33
Often overlooked compared to the prior mission of the program, it is infamous for being struck by lightning during launch twice.
Apollo 12
Although quite reliable this rockets first stage engine has resulted in its cancellation.
Atlas V
Even though it has very low thrust, this cycle has the best efficiency of all commonly used engine cycles
Expander cycle
Known around the world this spacecraft was the first spacecraft to land humans on the moon.
The Lunar Module or LEM
Recently developed this engine is the only engine of its kind to fly so far.
SpaceX's Raptor Engine
Popular with rocket fans, this rocket's launch process has a fiery start.
The Delta IV
Starship
Often described as the holy grail of rocket technology only 3 engines have ever used this cycle and one of them is being developed right now.
Full flow staged combustion cycle
Often overlooked, this joint ESA and NASA spacecraft is the only spacecraft to orbit around Saturn.
Cassini-Huygens
Even though it was only used for 13 launches this engine has achieved a legendary status.
Rocketdyne F-1
Generally regraded as the Rocket City, this small town has become the center of rocket development for NASA and the US military since the 1950s.
Huntsville, Alabama