Motorized Bicycle Engine Kit Forum  

Sponsors



Go Back   Motorized Bicycle Engine Kit Forum > Hybrid Motorized Bicyles & Tricycles > Hybrid Bikes & Trikes

Hybrid Bikes & Trikes Hybrids use more than one type of motor to maximize efficiency & range. With a long history of innovative use & design this section is for sharing your ideas and hybrid creations.

Reply
 
Thread Tools Display Modes
  #1  
Old 04-01-2017, 07:17 PM
Barcelona Barcelona is offline
Motorized Bicycle Newbie
 
Join Date: Apr 2017
Location: Missouri
Posts: 3
Default Question about usability

So, I have a build planned, that will use a 500w rear motor, a 250w front motor, and a KTM50. My question is about the KTM50, since I've been reading lately and it seems like it is a complete un-tamable monster of an engine, and getting it to be able to cruise around in is difficult to say the least. So, I already have the motor controllers, and a Schwinn Swindler 275, with a few other parts, all of which were gotten for free, and I plan to use a 9 tooth front sprocket, with a 65 tooth rear sprocket, to try and make the ktm a bit more usable. I'd be able to electric motor up to speed, and then throttle the ktm into operating range for the centrifugal clutch, if I needed more speed. So since, I'd have a 9/64, would I be making too much torque for this frame? And if so, could I just get the ktm power reducer? if so, that seems like a strange set up, and I really just want something that is reliable, that also will fit in my frame. Anyone have any suggestions?

EDIT: Just to mention, I would want to use this bike for transit, to get to and from work.
Reply With Quote
  #2  
Old 04-02-2017, 12:30 AM
ZipTie's Avatar
ZipTie ZipTie is offline
Motorized Bicycle Elite Member
 
Join Date: Jan 2016
Location: Mpls Mn
Posts: 636
Default Re: Question about usability

The only thing I notice that may not be right as far as I know is...Make sure its a geared hub motor(s) as un-geared hubs they put up a lot of magnetic resistance if no power is applied. Gearless hubs become big generators.. I would just add like one 36v 350 watt front geared hub.
The geared hubs offer no rolling resistance when no power is available to the hub.
Maybe you are going to use geared e hubs but you didn't mention it. What battery are you planning on using?
zip
__________________
"One pull and It's on, one snip and its off"
“Lets not get too technical”
Reply With Quote
  #3  
Old 04-02-2017, 01:42 AM
Barcelona Barcelona is offline
Motorized Bicycle Newbie
 
Join Date: Apr 2017
Location: Missouri
Posts: 3
Default Re: Question about usability

Quote:
Originally Posted by ZipTie View Post
The only thing I notice that may not be right as far as I know is...Make sure its a geared hub motor(s) as un-geared hubs they put up a lot of magnetic resistance if no power is applied. Gearless hubs become big generators.. I would just add like one 36v 350 watt front geared hub.
The geared hubs offer no rolling resistance when no power is available to the hub.
Maybe you are going to use geared e hubs but you didn't mention it. What battery are you planning on using?
zip
Is this true even when regenerative braking is disabled? I was unaware of this. Anyways, I hadn't decided on a battery, just going to get one off of alibaba, but I understand that I'd need to stay within the operating limits of the battery, in order to stay safe.
Reply With Quote
  #4  
Old 04-02-2017, 03:22 PM
ZipTie's Avatar
ZipTie ZipTie is offline
Motorized Bicycle Elite Member
 
Join Date: Jan 2016
Location: Mpls Mn
Posts: 636
Default Re: Question about usability

I believe even with regen off there is no way to completely get rid the resistance, it may let off some but gear less hubs can't turn off permanent magnets. With geared hubs there is a lunch that disengages and the hub spins with 0 resistance . You can pm cannonball, he will be glad to offer further info. Put it this way gear less hubs are not or peddling very far so your engine will fight resistance and that's not good in my opinion. If I spin my geared hub backwards there is a lot of resistance also
__________________
"One pull and It's on, one snip and its off"
“Lets not get too technical”
Reply With Quote
Reply

Tags
2wd, electric, gas, hybrid, ktm 50

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



All times are GMT -5. The time now is 04:33 PM.


Sponsors

Powered by vBulletin® Version 3.8.9
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
MotorBicycling.com