Questions about the process and principles used when designing aircraft engines. Use "jet-engine" and "piston-engine" tags to specify a certain type of engine.
Questions tagged [engine-design]
253 questions
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Would a ducted fan with a nozzle like a jet engine have more thrust than a normal ducted fan?
I'm trying to design a miniature ducted fan engine for a small project, but I'm not too sure how much contraction should happen between the fan and the end of the engine, if at all.
Engines like this or this look like they have very little…
TrapAlcubierreDrive
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Why don't piston engines require as heat resistant materials as jet engines?
Piston engines often get away with using aluminium as their heat exposed material, while even the early jets required inconel to operate.
Is that because the combustion takes only, for example, half of the time for two stroke engines hence half the…
Francis L.
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Is there a good online source on rotating detonating pulse engine?
I can't find a clear presentation that would explain the workings of a rotating pulse detonation engine graphically, only useless (to a layman) cfd simulations of the combustion chamber. Please share if you know a good online source to learn about…
Francis L.
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Could a Dyson fan displace more air without increasing the fan size?
So the Dyson Fan is cool. But it has a thrust to weight ration of 0.6. Not very efficient for flight. Its great at sucking large amounts of air but not at a very high velocity. Thrust is small amounts of air at high speed correct me if I'm wrong. Is…
Useruuu
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Could a jet engine be made from cast aluminium?
What materials are used to make the high temperature-high pressure bearing parts in a jet engine? I'm asking about the combustion chamber, combustors, nozzle and diffuzers (as in ramjets) rather than turbomachinery. Could cast aluminium or cast…
Francis L.
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Can anyone tell me more info about this radial engine?
non-aviation expert here doing a project for a friend.
I am trying to learn a little more info about this 3D model radial engine. I downloaded it off a stock 3D model website, that offered almost no information, specifications, etc included. After…
jerkules
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Why can't ramjet diffusers be stacked to achieve a good overall pressure ratio?
The problem with ramjets is that they only gain efficiency similiar to turbojets at speeds above mach 2. However, ramjets can operate at speeds of a few hundred km/h. Why therefore cant ramjet diffusers be stacked, analogously to compressor stages…
Francis L.
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