Posted by dan hicks on October 16, 2002 at 22:33:41:
In Reply to: e charger answers posted by sean on July 19, 2002 at 20:53:22:
yeah i know what your saying about some of this shit. i saw eram and thought hmmm yes it will work to a degree but is too much money for the wop. then i saw turbozet and that seemed to be a little more complex and clever in its design but the fan positioning is terrible... then there is turbopac from honeywell industries. this is basically a turbo that is ran by a high speed brushless motor. can give 4psi boost! sounds good eh? well its will cost you a grand at the least which sort of turns you off. i have an idea similar to this. you can construct an inline blower similar to the eram but instead use a brushless motor and a compressor fan. the fan would be lots of tight small blades to create the pressure such like a jet engine. all you now need is a controler which can spin the motor at say 100,000rpm or faster depending on the motor characteristics. i would consider this to be a viable idea, you can buy these motors that can spin near to that for £100 and the rest can be fabricated. i have plans to build such a device when i can get hold of a durable motor. the compressor fan has been donated from inside an oven and its an 18 bladed 3.5" pressed steel fan that i think would be capable of spinning at such speeds without coming apart. i tried to spin a computer fan at about 50,000rpm and it basically exploded which was fun. it was span by a performance brushed model motor that i rewound for more power but it span its own winding off the rotor and jammed up, think that drew about 60amps at 13.5 volts.... if i can machine a brushless motor out of alloy i am limited to windings and bearings burning and that is a small price. so you now got an inline blower that could perhaps run at 150,000rpm for short periods on a compressor fan in a 3.5" tube. don't know about you but the sound of the thing at full rpm would prob turn heads let alone add a boost. bear in mind that the eram spins at 30,000 rpm and has only a plastic 3 fin fan and that gives 1 psi. now imagine the later at 4 times the speed with better fan :0)
have a think on that. its easy really....