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Jet engines require oxygen to burn their fuel. When a jet gets to extremely high altitude, it is difficult to get enough air into the engine to keep the engines going. The limit for turbojets is about 40km. Ramjets can (theoretically) operate up to 75km altitude, but efficiency drops off above Mach 5 (1.5 km/s), which is far less than the escape velocity (11.2 km/s).
A rocket, on the other hand, carries oxidizer as well as fuel. It can continue to operate even when it gets above most of the atmosphere.
Rocket engines also have much higher thrust-to-weight ratio.
What else can I help you with?
What are space words beginning with Q?
Here are a few 'Q' words that have a direct or indirect connection with space and space travel:- QUEST QUASI-STELLAR OBJECT QUASAR QUALMS QUANDRY QUANTUM QUARTER (the moon's 'quarters') QUARTERS (accommodation for crew) QUEASY QUIET
What weather word starts with J?
jet stream
Do bishop Eddie long have his own jet?
Bishop Eddie does not have his own jet, but really, it was really his great great grandfather's. 1976
The polar jet stream moves from?
east to west
Was Garth Brooks in jet ski accident?
Yes
Are rockets and jet engines the same?
No. Jet engines draw oxygen from the atmosphere to mix and burn with jet fuel, and cannot function in a vacuum. Rockets carry their own oxygen, and can travel in the vacuum of space.
Why do airplanes not go into space?
The wings of an aeroplane use the air to hold up the plane. The Earth's atmosphere does not extend into space, it ends about 200 miles up. Planes cannot function without air. Therefore, space travel is done by means of rockets rather than planes. Jet engines require oxygen to operate. They do not have their own source of the gas like space rockets have. Most are not equipped to handle the cold and pressures (lack of it) found in space.
What has the author D N Ahnstrom written?
D. N. Ahnstrom has written: 'The complete book of jets and rockets' -- subject(s): Airplanes, Jet planes, Jet propulsion, Juvenile literature, Military Aeronautics, Rockets (Aeronautics)
What is the fuel for the rockets that carries the shuttle to space?
High octane jet fuel.
What engine can launch an object into space?
Currently, only solid-fueled rockets (which cannot be stopped and restarted, it works like fireworks) or liquid fueled rockets, which usually use liquid hydrogen. Jet engines cannot go into space, as it uses the air, something that there isn't in space. Nothing as of now can fling an object into space and overcome the gravitational pull besides for rockets.
What are four kinds of rockets?
Tiny models, Missles, Space probes, and Rocket-powered jet packs.
What is the mission of the airplanes that leave contrails?
To be an airplane with jet engines? All jet airplanes leave contrails.
How is the space shuttle different from rockets?
The space shuttle is a reusable spacecraft that can launch like a rocket but can also land like an airplane. Rockets are typically one-time use vehicles that are not designed to return to Earth intact. Additionally, the space shuttle can carry astronauts and cargo to space, whereas rockets are mainly used for payload delivery.
Are jet airplanes faster than turbo prop airplanes?
Yes.
What are benefits for jet airplanes?
they fly
How do jet airplanes get of the ground?
Gravity.
Jet airplanes fly in the?
Air
