Fuel Economy, Hypermiling, EcoModding News and Forum - EcoModder.com - View Single Post - 125CC sufficient (for aerodynamic custom tadpole trike)?

Christ · 11-15-2009, 01:54 AM

Sweet, cuz I was hoping for 70+MPG and 55MPH tops!

Yeah, it's a 4 stroke, 4 speed. Not sure on power or torque figures, though.

I'm looking at the half tear drop profile, basically. I'd like to see a Cd of .2 or less (not likely, though, I don't think), and A of ~10-15 sq.ft. max. So assuming max figures, I want a CdA lower than 30. This should be completely doable with a tadpole, considering there is only one seat, and approx a 50" max width.

The way the engine is supposed to be setup, it won't idle at all. There's probably going to be a way to either human power the vehicle to very low speed from a stop, where the engine will take over.

If the Human Power part doesn't work out well, a recoil setup can be added to the braking system, I suppose. I want to make it so that I can continue to use the title to the original motorcycle, making it highway legal.

11-15-2009, 01:54 AM	#3 (permalink)
Christ Moderate your Moderation. Join Date: Nov 2008 Location: Troy, Pa. Posts: 8,919 Pasta - '96 Volkswagen Passat TDi 90 day: 45.22 mpg (US) Thanks: 1,369 Thanked 430 Times in 353 Posts	Sweet, cuz I was hoping for 70+MPG and 55MPH tops! Yeah, it's a 4 stroke, 4 speed. Not sure on power or torque figures, though. I'm looking at the half tear drop profile, basically. I'd like to see a Cd of .2 or less (not likely, though, I don't think), and A of ~10-15 sq.ft. max. So assuming max figures, I want a CdA lower than 30. This should be completely doable with a tadpole, considering there is only one seat, and approx a 50" max width. The way the engine is supposed to be setup, it won't idle at all. There's probably going to be a way to either human power the vehicle to very low speed from a stop, where the engine will take over. If the Human Power part doesn't work out well, a recoil setup can be added to the braking system, I suppose. I want to make it so that I can continue to use the title to the original motorcycle, making it highway legal. __________________ "¿ʞɐǝɹɟ ɐ ǝɹ,noʎ uǝɥʍ 'ʇı ʇ,usı 'ʎlǝuol s,ʇı" Last edited by Christ; 11-15-2009 at 02:02 AM..