72V / 55A BMC Scooter project

Show off your E-Scooter or Motorcycle creation here.
Post Reply
User avatar
McDesign
100 W
100 W
Posts: 234
Joined: Jul 14, 2010 8:00 am
Location: Atlanta, GA

72V / 55A BMC Scooter project

Post by McDesign » Apr 20, 2011 2:06 pm

Working on this now to learn about brushless motors. Frame and swing arm are done; seat, bars this weekend.
Super Scooter 2.2.jpg
Super Scooter 2.2.jpg (61.89 KiB) Viewed 2748 times
Super Scooter 3.jpg
Super Scooter 3.jpg (64.93 KiB) Viewed 2748 times
Super Scooter 4.jpg
Super Scooter 4.jpg (51.17 KiB) Viewed 2787 times
Forrest
Last edited by McDesign on Apr 20, 2011 3:33 pm, edited 1 time in total.

User avatar
sk8norcal
10 GW
10 GW
Posts: 4297
Joined: May 16, 2010 5:29 am
Location: San Jose, CA
Contact:

Re: 72V / 55A BMC Scooter project

Post by sk8norcal » Apr 20, 2011 2:45 pm

looks great!

check out the jackal, if you havent seen it before,,

http://www.greenspeed.us/jackal_electric_bicycle.htm

User avatar
McDesign
100 W
100 W
Posts: 234
Joined: Jul 14, 2010 8:00 am
Location: Atlanta, GA

Re: 72V / 55A BMC Scooter project

Post by McDesign » Apr 21, 2011 2:59 pm

Jackal is cool! Spendy, tho' . . .

Here's a frame weldment detail - I'm happy with the strength and stiffness. I think if I do it again, I'll lighten up the gauges - I just used what I had this first one.
SS Frame Base.jpg
SS Frame Base.jpg (38.88 KiB) Viewed 2688 times
Forrest

User avatar
McDesign
100 W
100 W
Posts: 234
Joined: Jul 14, 2010 8:00 am
Location: Atlanta, GA

Re: 72V / 55A BMC Scooter project

Post by McDesign » Apr 22, 2011 4:22 pm

Had fun with this today on my day off - I love the look of the twin discs on the front - have to figure how to pin the right side to prevent rotation -
100_1824.JPG
100_1824.JPG (62.24 KiB) Viewed 2651 times
100_1825.JPG
100_1825.JPG (108.69 KiB) Viewed 2690 times
100_1827.JPG
100_1827.JPG (76.73 KiB) Viewed 2651 times
Forrest

User avatar
sk8norcal
10 GW
10 GW
Posts: 4297
Joined: May 16, 2010 5:29 am
Location: San Jose, CA
Contact:

Re: 72V / 55A BMC Scooter project

Post by sk8norcal » Apr 22, 2011 5:36 pm

damn! you are quick!

looks good,
where u get those wheels?

User avatar
McDesign
100 W
100 W
Posts: 234
Joined: Jul 14, 2010 8:00 am
Location: Atlanta, GA

Re: 72V / 55A BMC Scooter project

Post by McDesign » Apr 22, 2011 8:32 pm

The wheels are just what I have dozens of - need some?

Got the boy out of bed just now for a "fitting" with the bars and seat - he digs the racy crouch. He wants rear pegs as well, back on the swing arm. Hmmmm . . .
100_1830.JPG
100_1830.JPG (106.46 KiB) Viewed 2631 times
Forrest

buzzfirst
10 W
10 W
Posts: 97
Joined: Nov 20, 2008 1:00 pm

Re: 72V / 55A BMC Scooter project

Post by buzzfirst » Apr 23, 2011 9:38 am

Wow, congrats on moving the project from vapor to steel so fast! That is gonna be one cool ride when you are done. Love the dual rear shocks. Have you given any thought to possibly angling the bottom of the battery box at the front from the sides and the bottom? Two inches of 45 degrees (or possibly 3 or 4 inch radius at the front) just to give the box a chance to jump over a root or an ankle a chance to glance off the front edge of the battery box? I caught the front edge of my mower deck on a root and would up out in front of the tractor at about 10 mph and it was very abrupt :shock: Not to mention having to roll out from in front of the running tractor and mower. Seems the only safety equiptment on an early 6N Ford tractor is between the operators ears(fail).

User avatar
sk8norcal
10 GW
10 GW
Posts: 4297
Joined: May 16, 2010 5:29 am
Location: San Jose, CA
Contact:

Re: 72V / 55A BMC Scooter project

Post by sk8norcal » Apr 23, 2011 7:27 pm

thanks for the offer on wheels, I don't need them..
Those `12.5" looks better than the fat 10" wheels on my charly..

check out the oset for kids, if you haven't seen it before,
http://www.osetbikes.com/

User avatar
McDesign
100 W
100 W
Posts: 234
Joined: Jul 14, 2010 8:00 am
Location: Atlanta, GA

Re: 72V / 55A BMC Scooter project

Post by McDesign » Apr 25, 2011 7:28 am

Motor mount, fresh from CAD, and some sheet bracing / fender on the steering neck -
100_1843.JPG
100_1843.JPG (64.88 KiB) Viewed 2595 times
100_1848.JPG
100_1848.JPG (79.62 KiB) Viewed 2595 times
100_1849.JPG
100_1849.JPG (80.92 KiB) Viewed 2595 times
Forrest

User avatar
Monstarr
100 W
100 W
Posts: 248
Joined: Apr 12, 2011 4:56 am
Location: The Netherlands

Re: 72V / 55A BMC Scooter project

Post by Monstarr » Apr 29, 2011 6:54 am

Nice project & engineering! Also like the sporty shocks!!! 8)

I am thinking about doing sort of the same thing in the near future but I will use an existing scooter frame. I was planning on using a decent rear hub motor in which case you dont have to worry about mounting the motor to the frame. So a question rises to my mind... why are you using a DC motor with a transmission instead of an easy hubmotor?

User avatar
McDesign
100 W
100 W
Posts: 234
Joined: Jul 14, 2010 8:00 am
Location: Atlanta, GA

Re: 72V / 55A BMC Scooter project

Post by McDesign » Apr 29, 2011 10:18 am

This motor is AC - the 1500W BMC from the SuperKids with a Chrystalyte controller.

As an engineer., I'm philosophically opposed to hub-motors.

It's like a bumpersticker i have on the truck,

The French - Not Just Different - WRONG!

Forrest - love french food, tho'

slayer
1 kW
1 kW
Posts: 400
Joined: Jun 03, 2007 8:59 pm
Location: gatineau Qc

Re: 72V / 55A BMC Scooter project

Post by slayer » Apr 30, 2011 9:03 pm

Hello ....


This thread belongs in the junk toxic thing department i think







Merci

User avatar
McDesign
100 W
100 W
Posts: 234
Joined: Jul 14, 2010 8:00 am
Location: Atlanta, GA

Re: 72V / 55A BMC Scooter project

Post by McDesign » May 01, 2011 8:30 am

Ah - you misunderstand me, mon ami!

I spent lots of time in Dijon and around Burgundy several years ago with another job. The French engineers and I had a great time bashing our respective "stereotyped" engineering cultures.

There's a great book about the Chunnel (called Chunnel, IIRC) that really delineates the great differences in approaches between French and English engineering.

Then we would go out for great food and wine.

Forrest

User avatar
sk8norcal
10 GW
10 GW
Posts: 4297
Joined: May 16, 2010 5:29 am
Location: San Jose, CA
Contact:

Re: 72V / 55A BMC Scooter project

Post by sk8norcal » Aug 11, 2011 2:10 am

whatever happened to this scooter?

User avatar
McDesign
100 W
100 W
Posts: 234
Joined: Jul 14, 2010 8:00 am
Location: Atlanta, GA

Re: 72V / 55A BMC Scooter project

Post by McDesign » Aug 11, 2011 5:32 am

Still in pieces, ; never built the battery box.

Now I'm thinking the motor will go into a go-cart - might finish up and let that frame go for a song.

Forrest
Last edited by McDesign on Aug 11, 2011 9:46 am, edited 1 time in total.

User avatar
Jay64
10 MW
10 MW
Posts: 2311
Joined: Nov 16, 2007 9:03 pm
Location: St. Petersburg, Florida
Contact:

Re: 72V / 55A BMC Scooter project

Post by Jay64 » Aug 11, 2011 9:28 am

Forest, that is some amazing work. Beautiful in fact. I had got caught up in my old job and then trying to re-start my race team that I had missed a lot of posts on this site. I'm glad this one got bumped and I got the chance to see it.
Johnson64.Com "The stone age didn't end because we ran out of stones."
EV Bikes:
'13 Zero S 11.4kwh.
GS500, ME0913, Sevcon Size 6 Controller, 90v40ah Lipo, GSXR suspension..
'87 Hurricane 600, ME0709, 48v/50a SLA, Kelly KD72400, Magura Throttle, High Current Cycle Analyst.
http://www.evalbum.com/2275
Raleigh beach cruiser: 9C rear hub, stock controller, 48v10ah lithium, Cycle Analyst.
Phat Chopper: 9C front hub, stock controller, 48v12ah a123s, Cycle Analyst.

Post Reply