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Originally Posted by Poppy
Were the Germans successful with coal fuel gas(have I got that right?) and if they were,then it makes sense that coal dust would be apart of their research..Maybe Big Oil doesn't want coal to be seen as an alternative, and has corked info on coal as an alternative to the oil problem?...forgive my naivety
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No need, coal dust is just like coal. It burns well, it is not a perfered fuel for most vehicles because you need to have a uniform fuel, and the ground up coal tends not to be uniform. Plus other issues. What is more common in vehicle fuels is the liquification of coal, this works well but is expensive. Not to mention that we have the same problems getting it out of the earth.
Quote:
Originally Posted by Grommo
I think you are making the assumption that these ramjet tests were exclusively to test an engine for the P13.
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You are correct. Was it intended for other planes?
Quote:
Originally Posted by Grommo
The tests were to develop operating ramjets and learn about them.
Remember that ramjets do not require supersonic speed to start. A myth that others have fallen for in this thread.
These engines and any aircraft they might later be mounted in would have to be started at a few hundred kilometres an hour and then be able to accelerate the aircraft to whatever its eventual top speed is. So worrying about how the engine operates at 2000+km an hour is a little premature.
It has to be able to get there first from lower speeds and obviously this would be the focus of development.
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Okay I see where you are coming from now. Ramjets are not as efficient as normal jet engines below the speed of sound. At least then. So in light of the fuel situation I figured that they would only use them above that speed. However I can them as a way to get a plane that fast with out the time to develop the next generation of jet engines... Hum...