i got my results from the equation found in biddwells [spelling] "EL CHOPPER". i've found the equation works very well for my current bikes, so i just tried reducing the Cd, i even tried 0.1, but the equation only improved range about 2 to 3 times more which is far less than the claims Craig Vetter group has which is about 5 to 10 times more range. i believe these gas claims can be true since it is starting with a less efficient bike
i don't know for sure if i'm right or not, but i'll look at the links below to see if i can learn more. i think we may just have to build a low aero ebike to find out? i would like to work on such a project, but that would be about 3 projects away for me right now. john fisher <[EMAIL PROTECTED]> wrote: I have been thinking through an ultra-lightweight project and I think the aero has a much greater effect than you are implying here. In fact you can get substantial improvements over an unfaired chassis even at bicycle speeds. Just try riding your bike into a headwind for example. Trying to figure out which body work is better is much much harder, and may require experimentation or very sophisticated CFD software. Its way beyond me at any rate. I figure if you can get 80% there by copying known successful designs, thats good enough for a low-budget project. The electrathon designs are proven, for example. Now for two-wheels, I think its very different. You can get in real trouble trying a so-called dustbin fairing. I'd probably go with a race fairing and close up the holes. Bikes just have terrible aerodynamics. try these calculators for a rough idea of the advantages http://www.geocities.com/hempev/EVCalculator.html?200629 http://www.evconvert.com/tools/evcalc/ http://www.kreuzotter.de/english/espeed.htm HTH John damon henry wrote: > It seems to me the changes should be proportional. .... harry Albuquerque, NM http://geocities.com/hendersonmotorcycles/blog.html http://www.austinev.org/evalbum/1179 http://geocities.com/solarcookingman --------------------------------- Looking for last minute shopping deals? Find them fast with Yahoo! Search.
