I would not even think about trying to build my own turbines.... I have friends that work in that industry they happen to work at 3 of the top companies GE, Pratt, and Siemens/westing house. I have seen the work that has to go into the parts, one guy spent 2 years working on a vain for the second turbine after the combustor. Now this is at a company who has experts doing the design and big $$$$ to make many prototypes. A turbine powered vehicle is just something my cousin and I have been wanting to try for a long time. It started with looking at building one from an old turbo and trying to mount it to a motorcycle frame. Your Freon system sounds really interesting. Have you done any formula calculations or started a design? I would really like to see some if you have. Andrei ----- Original Message ----- From: "Stragand, Dave" <dave.stragand@xxxxxxxxxxx> To: <DMCForum@xxxxxxxxxxxxxxx> Sent: Thursday, August 15, 2002 4:30 PM Subject: RE: Video WasRe: [DMCForum] Stuck in the doldrums.... > Chrysler had several turbine projects dating back all the way to 1954. The biggest problem was exhaust heat. They 1200+ degree temps had a tendency to actually set asphalt on fire (although regenrators helped cut the heat down to half that, paper near the exhaust -would- burst into flame). You have to run combustion turbines at high speeds (2,000 - 25,000+ RPM compared to lower-speed steam/air turbines) to get any kind of torque or effeiciency from them, and at such speeds vibrations are a real problem. (http://www.turbinecar.com/turbine.htm , http://www.allpar.com/mopar/turbine.html) > > Andrei -- as an FYI -- it will be damn near impossible for you to fabricate the components you'll need for the turbine that can handle the stress and the speeds, as well as maintaining precision weighting of each individual blade to avoid vibration that will blow it apart. Bear in mind also that you'll have to plan for centripital lengthening and deformation of the blades at those speeds, as well as with the heat and combustion pressures. You're also going to need to work with expensive, exotic alloys to have success at these speeds. If anything, you're probably going to have to find a way to adapter impeller blades from a very small jet, which are expensive, hard to find, and also only about 1/8 of the length you'd need for a combustion turbine. There's a reason you don't see combustion turbines used very often. I don't know of a single consumer or industrial use for these engines. Nonetheless, if you do end up giving it a shot, I'd love to hear more about what worked! > and didn't work for ya'! > > A better, more workable solution was developed by a man named Lear, of Lear Jet fame. His Lear Vapordyne was a steam turbine using captive Freon for steam. He entered the Vapordyne in the Indy 500 in 1969, but was banned because they could never figure out how to classify his "displacement". The real reason was, he could finish the entire race on one tank of fuel -- and that fuel could be anything from vegetable oil to diesel to alcohol. (http://lear-archives.com/learmotors.htm , http://www.exford.co.uk/Steam/Latest.htm) ------------------------ Yahoo! Groups Sponsor ---------------------~--> 4 DVDs Free +s&p Join Now http://us.click.yahoo.com/pt6YBB/NXiEAA/RN.GAA/HliolB/TM ---------------------------------------------------------------------~-> To unsubscribe from this group, send an email to: DMCForum-unsubscribe@xxxxxxxxxxxxxxx Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
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