RE: [ihc] no IH content, but fun--

[bearbvd@xxxxxxxxxxxxxx (Greg Hermann)]

At 8:58 AM 10/26/04, Mac McMuffin wrote:
>## >> Nope. Then again, have you ever heard of a Campini engine ?? A piston
>## >> engine in which all the crank does is drive the supercharger. Exhaust,
>## >> combined with (air cooled) engine heat provides thrust !!
>## >>
>## >> Greg
>
>i hate to precipitate on your outdoor linear social event, but...

I agree that this is a far closer description than I gave, but I think you
will find that the intake air for the piston engine is taken AFTER the
compressor---making it supercharged.

Greg
>
>are you sure that's the Campini engine you're referring to?  i could find no
>example of any engine under the name "Campini" which operates as you
>describe.  with a relatively quick search of the Internet, however, i found
>the following references, which describe the both the original Campini
>engine and Caproni airplanes, first flown in 1940, as well as information on
>the engine type upon which those were based.  also included is information
>on the various other jet engines developed in that period and since.
>
>according to each of these examples, the Campini jet engine was essentially
>a ducted afterburning fan, wherein a conventional piston engine drove a
>series of compressor fans inside a duct, with a combustion chamber and ring
>of fuel injectors towards the rear of the duct (after the compressor stage)
>to act as an afterburner.  essentially the compressor stage drives
>compressed air into the combustion chamber where it is mixed with fuel and
>ignited.  this of course results in thermal expansion which exits at high
>pressure from the rear of the chamber, providing thrust.  in this engine
>type, the compressor fans are directly driven by the piston engine's
>driveshaft, and the entire assembly is contained within the duct.  the
>Campini design is known as a "Thermojet" (first invented and flown in 1910
>by Henri Coanda, see below).  it is interesting to note that a Thermojet can
>function without the afterburner, the compression stage alone can provide
>enough thrust to maintain flight.
>
>according to a number of sources, the Thermojet was both preceded and
>superceded in application by the turbojet engine designed simultaneously and
>independently by a German scientist named Hans von Ohain and a British RAF
>officer named Sir Frank Whittle (the Whittle engine was patented in 1932).
>all modern turbojet engines are based on the German/British designs of that
>period; for all practical purposes the Thermojet engine development ceased
>after World War II and exists now only in academia and RC model airplanes.
>there have been attempts here and there to make use of the Thermojet in
>various applications since that time, but there do not appear to be any
>records of successful development.
>
>this one has pictures and descriptions of the Campini airplanes and their
>engines:
>http://www.museoscienza.org/english/aereo/caproni.html
>http://www.wordiq.com/definition/Thermojet
>
>early jet airplanes and engines:
>http://tanks45.tripod.com/Jets45/Histories/CC-2/CC-2.htm
>http://tanks45.tripod.com/Jets45/ListOfEngines/EnginesOther.htm
>
>http://www.isoliti4gatti.com/Cc2.htm
>http://www.aerospaceweb.org/question/history/q0144.shtml
>http://history.acusd.edu/gen/WW2Timeline/jets.html
>http://www.fact-index.com/j/je/jet_engine.html
>
>Henri Coanda:
>http://www.wordiq.com/definition/Henri_Coanda
>
>i would be delighted to know what piston engine it is that drives only a
>supercharger from the crankshaft, deriving thrust from engine heat and
>exhaust gases.  i am continuing my research, but as of this writing have
>come up with nothing.  perhaps Ryan might know what engine this might be...
>Ryan?
>
>--Mac
>
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>Krystof "Mac" MacBryghde
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