Go Back  

DIY Electric Car Forums > EV Conversions and Builds > Electric Bikes

Register Blogs FAQ Members List Social Groups Calendar Search Today's Posts Mark Forums Read

Reply
 
Thread Tools Display Modes
  #11  
Old 11-16-2012, 10:19 AM
rmay635703's Avatar
rmay635703 rmay635703 is offline
Senior Member
 
Join Date: Oct 2008
Location: somewhere in wisconsin
Posts: 629
rmay635703 is on a distinguished road
Default Re: formula for a 70 mph mini bike

Quote:
Originally Posted by evolutioneng View Post
okay im going to make a prototype mini bike elctric.what battery cell(s) does someone recommend. which electric motor does someone recommend. 300 weight person. im going to use a centrifugal clutch for the trans. i have a battery plus store where close by so i believe ill be getting it from their if the price is right .
Motorcycles are notoriously NON aerodynamic. Nearly 100% of your energy at 70mph will be to overcome extreme wind drag.

If you want your bike to reach 70mph regardless of your batteries, motor, etc you only need to build up your fiberglass skills and make a fairing.
http://ecomodder.com/blog/diy-aero-f...cycle-214-mpg/

After you make the fairing nearly anything 3hp or better will move you to 70mph.

Cheers
Ryan
Reply With Quote
Sponsored Links
  #12  
Old 11-16-2012, 10:31 AM
Arlo Arlo is offline
Senior Member
 
Join Date: Dec 2009
Location: Canada
Posts: 316
Arlo is on a distinguished road
Default Re: formula for a 70 mph mini bike

Quote:
Originally Posted by rmay635703 View Post
Motorcycles are notoriously NON aerodynamic. Nearly 100% of your energy at 70mph will be to overcome extreme wind drag.

If you want your bike to reach 70mph regardless of your batteries, motor, etc you only need to build up your fiberglass skills and make a fairing.
http://ecomodder.com/blog/diy-aero-f...cycle-214-mpg/

After you make the fairing nearly anything 3hp or better will move you to 70mph.

Cheers
Ryan
Luke over on es has a bicycle that does over 100mph with no arrow dynamics what so ever that's not a typo!
__________________
Worlds fastest electric bmx? http://www.youtube.com/watch?v=HSh8uGcFpJs
Yamaha E-YSR with 15kw DIY BLDC controller!
http://www.youtube.com/watch?v=91pGd...6Y37xYFFPRdPhw
The funnest thing I have built. https://www.youtube.com/watch?v=lIsuU6LhDIE
Reply With Quote
  #13  
Old 11-16-2012, 10:54 AM
frodus's Avatar
frodus frodus is offline
Senior Member
 
Join Date: Apr 2008
Location: Portland, OR
Posts: 3,472
frodus will become famous soon enoughfrodus will become famous soon enough
Default Re: formula for a 70 mph mini bike

.... and a large motor/controller that does 40+HP IIRC
__________________
Travis Gintz
Electro Motive Force, LLC.
Reply With Quote
  #14  
Old 11-16-2012, 07:55 PM
rmay635703's Avatar
rmay635703 rmay635703 is offline
Senior Member
 
Join Date: Oct 2008
Location: somewhere in wisconsin
Posts: 629
rmay635703 is on a distinguished road
Default Re: formula for a 70 mph mini bike

Quote:
Originally Posted by Arlo View Post
Luke over on es has a bicycle that does over 100mph with no arrow dynamics what so ever that's not a typo!
Yes but would you rather have a $100 fairing + $500Motor/Controller/Batteries

-OR- No fairing but $3500 in Motor/Controller/Batteries

and both do 70mph?
Reply With Quote
Sponsored Links
Reply

Share or Bookmark this

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

 

All times are GMT -6. The time now is 04:38 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Copyright 2009 Green Web Publishing LLC
Ad Management by RedTyger