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How is a jet engine attached to a wing?
Engines are attached to a pylon The pylon is fixed into the wing structure, with a solid and very secure fitting. The pylon creates some distance between the engine and the wing. This is vital in the event of an engine fire to protect the wing (and fuel stored in it) until the engine fire is extinguished.
What causes a jet engine to explode?
A compressor, made of spinning blades inside the main shaft of the engine, then raises the pressure of this air. This compressed air is sprayed with fuel and lit with an electric spark. This causes the now burning gases to expand and blast out through a nozzle at the back of the engine, providing forward thrust.
What kind of jet engine can operate at supersonic speeds?
Ramjets work most efficiently at supersonic speeds around Mach 3. This type of engine can operate up to speeds of Mach 6. A scramjet is a variant of a ramjet airbreathing jet engine in which combustion takes place in supersonic airflow.
How does the mounting location of a jet engine affect aircraft?
The high-velocity engine exhaust (I’m hand-waving a bit here) adheres to the surface and allows the wing to produce lift somewhat longer than it could otherwise. This layout also vastly reduces the amount of debris and spray that can reach the intakes and damage the engines.
How does a compressor blade work in supersonic flow?
A compressor blade works best in subsonic flow. Supersonic flow introduces additional drag sources which should be avoided if efficiency is important. Thus, the intake has to slow down the air to a Mach number between 0.4 and 0.5.
How are jet engines able to run at high speeds?
Due to the high flight speeds, compression is possible by a cascade of shocks, so no moving turbomachinery is needed in ramjets and scramjets. All jets decelerate air in their intake in order to increase air pressure. This compression heats the air, and in order to achieve a combustion which produces thrust, this heating must be restricted.