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!st human supersonics
"Earl Colby Pottinger" wrote in message ... (Ken S. Tucker) : PS: I'd respond to some of the threads in this NG, except everybody is smarter than me. Not true, if you realize that there are people existing who are smarter than yourself, then automaticlly you are smarter than some of the people who post here who are in fact are too dumb to know that they are not smart. IE best example B.G. This answer deserves at least one "Me Too" response. If you put everyones' opinion ahead of your own judgement, you will become as lost as those Earl warns you about. There is little shame in not knowing if you are dilligently working on it. It is worth while to think of many of the problems discussed here in terms of onion skins. Each layer you penetrate with understanding reveals another layer to understand. Some people penetrate a few layers and believe they have reached the core, when there are many layers left to go. One of the classics is the Isp layer. Aha, hydrogen can get you into orbit with a mass ratio of 9 instead of the 16 or more with kerosine. Someone peels another layer and, Aha there is less equipment mass with the kerosine system. Then another layer down etc. |
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!st human supersonics
In article ,
Earl Colby Pottinger wrote: I figure if this is true, then an improved mechanical system could accelerate models to supersonic and hypersonic speeds with an improved mechanical system. Already thought on that, it will not be easy to design, plus the tip of a whip does not mass much, you need to put as much engry into the system as is needed to move the model that fast. It is almost certainly cheaper and simpler to just build a rocket sled. (Yes, there are supersonic and even hypersonic rocket sleds.) -- MOST launched 30 June; first light, 29 July; 5arcsec | Henry Spencer pointing, 10 Sept; first science, early Oct; all well. | |
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!st human supersonics
Earl Colby Pottinger wrote in message ...
Hi Earl, this goes back awhile. (Ken S. Tucker) : I was asked awhile ago if supersonic or hypersonic catapults were possible, to economically test modeled aircraft. When I researched supersonic speeds created by humans I found that the tip of a bull-whip was the first time humans were able to consistently *break the sound barrier*. Is this a myth? ie. Is it true that a *bull-whip's* tip breaks the sound barrier at the tip? I am pretty sure that is true, but ofcourse I could be wrong Henry Spencer seems to think so too. I figure if this is true, then an improved mechanical system could accelerate models to supersonic and hypersonic speeds with an improved mechanical system. Already thought on that, it will not be easy to design, plus the tip of a whip does not mass much, you need to put as much engry into the system as is needed to move the model that fast. The general principle I had in mind was to store the energy in a flywheel. Then using the fact a flywheel is moving slowly near the center and rapidly near the circumference, spool on a cord starting near the center. As it winds in the cord, the cord speed accelerates, as it spools toward the circumference. The model is attached to the cord of course and detaches at a suitable time to glide away. Earl Colby Pottinger I make public email sent to me! Hydrogen Peroxide Rockets, OpenBeos, SerialTransfer 3.0, RAMDISK, BoatBuilding, DIY TabletPC. What happened to the time? http://webhome.idirect.com/~earlcp Regards Ken S. Tucker |
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