What planes can reach Mach 3?

Still in limited service today, the MiG-25 Foxbat is the only aircraft capable of speeds over Mach 3.0 in use by airforces.

What is the difference between ramjet and pulse jet engine?

Ramjets differ from pulsejets, which use an intermittent combustion; ramjets employ a continuous combustion process. As speed increases, the efficiency of a ramjet starts to drop as the air temperature in the inlet increases due to compression.

What is a pulse wave detonation engine?

A pulse detonation engine (PDE) is a type of propulsion system that uses detonation waves to combust the fuel and oxidizer mixture. The engine is pulsed because the mixture must be renewed in the combustion chamber between each detonation wave and the next. PDEs have been considered for propulsion since 1940.

What are pulse jets used for?

Pulsejets are used today in target drone aircraft, flying control line model aircraft (as well as radio-controlled aircraft), fog generators, and industrial drying and home heating equipment.

How does a scramjet work?

A ramjet operates by combustion of fuel in a stream of air compressed by the forward speed of the aircraft itself, as opposed to a normal jet engine, in which the compressor section (the fan blades) compresses the air. Scramjet powered vehicles are envisioned to operate at speeds up to at least Mach 15.

How does a pulse detonation engine work?

Pulse detonation rocket engines operate by injecting propellants into long cylinders that are open on one end and closed on the other. When gas fills a cylinder, an igniter—such as a spark plug—is activated. Fuel begins to burn and rapidly transitions to a detonation, or powered shock.

What is the difference between detonation and pre ignition?

Pre-ignition is the ignition of the air- fuel charge while the piston is still compressing the charge. Detonation – Detonation, as the name suggests, is an explosion of the fuel-air mixture inside the cylinder. It occurs after the compression stroke near or after top dead center.

What is a pulsedpulse detonation engine?

Pulse detonation engines create a series of repeated explosions in a manner similar to a pulse jet, and these have already been tested in aircraft – notably in the Scaled Composites Long-EZ “Borealis” project built by the US Air Force Research Laboratory and Innovative Scientific Solutions Incorporated back in 2008.

Could a new detonation engine propel an aircraft to 17 times sound?

UCF researchers say they’ve trapped a sustained explosive detonation, fixed in place, for the first time, channeling its enormous power into thrust in a new oblique wave detonation engine that could propel an aircraft up to 17 times the speed of sound, potentially beating the scramjet as a hypersonic propulsion method.

What’s new in hypersonic detonation?

World first: Oblique wave deto… UCF researchers have successfully fired up a new hypersonic detonation engine that harnesses the raw power of a sustained, trapped explosion. The new engine could power aircraft up to 17 times the speed of sound.

What is the difference between a pulse detonation and a deflagration?

Unfortunately, detonations are many times louder than deflagrations. The major difficulty with a pulse-detonation engine is starting the detonation. While it is possible to start a detonation directly with a large spark, the amount of energy input is very large and is not practical for an engine.