I'm building a linear motor employing two coils, arranged axially, about 1" apart, with a hollow rod passing through the coils. I'm planning on embedding a soft iron slug or permanent magnet in the center of this hollow rod, and then energizing each coil alternately to pull the rod back and...
In SBBlue's thread "Value of Engine Efficiency? (thread71-105903), SBBlue said:
"The smaller the engine, the better the engine efficiency, because the smaller engine operates at a higher rpm to produce the same amount of power as a larger engine."
In considering this, I think I don't at all...
I hate to belabor the point, and please pardon my stupidity, but:
Why aren't gas turbines widely used in cars?
From what I can gather, it's because they have a narrow load/speed range, because they have poor throttle response, and because they really eat fuel at idle.
OK. Let's say I had a...
Has anyone on these forums heard of using a free-piston compressor to boost the compression ratio of a turboprop or turbofan?
The concept would be to refit the combustion chamber of an existing jet engine with a cylinder, valves or ports, and a free piston, using the "air cushion" on...
