Giant LAFree Sport

General Discussion about electric bicycles.

Giant LAFree Sport

Postby AviationMetalSmith » Sun May 20, 2007 12:40 pm

I bought a used Giant Lafree Sport in October, 2004.
I only paid $250.00. Some rich kid lost interest and his mother sold it in a clasified ad in the local paper.

I couldn't restist taking the motor cover off to look at the mechanism. While I had it off, I painted it with OSHA yellow spray paint.
Last Sunday (one week ago) , I bought a disposable digital camera and took some pictures.
Here are the photos:
Image
The first thing I bought was the rear rack, which cost $40.00 at the local bike shop (LBS). Then I bought a front basket, which is wire mesh. The holes are small on this basket, which keeps small objects from falling through. Then I made a set of small pannier boxes, just big enough to hold a 12 volt 12 amp/hour battery each. I figured I could double the range of the bike this way. Right now, I have a 12v 7ah in the right box, which provides power to the lights.
Then I topped it off with a fiberglass seat with two inches of foam padding and brown Naugahyde. Then a friend of mine gave me an eighteen inch "Farm Triangle", or slow-moving-vehicle sign.
Here's another photograph:
Image
Rear view, showing the "Farm Triangle":
Image
There is a 20 watt halogen bulb wired to the inside of the front basket, visible in this front view:
Image
Just one more photograph:
Image
Right now, the Lafree needs a new battery, it only goes about a mile and dies. I think I overcharged it.
AviationMetalSmith
100 µW
100 µW
 
Posts: 8
Joined: Thu May 17, 2007 7:51 am
Location: Long Island, New York

Postby Toorbough ULL-Zeveigh » Thu May 24, 2007 6:06 am

So how fast have you gotten within that one mile?
That farm-triangle must act like an anti-fairing.
Any plans to go beyond the stock power level? :twisted:
I think there needs to be a term or phrase that describes an ebike configuration like this where the battery module sits behind the seat tube on a stretched frame. A lot of the chinese makes seem to favour this layout.


Just one question about the rack, did it come with the long front stays like that or did you have to fab them? I've been looking for something like that which would accomodate the reduced-angle triangle of most newer bikes.
the pessimist engineer sees a glass that’s twice as big as it needs to be.
the optimist engineer sees that the glass has a 100% safety tolerance.
http://what-if.xkcd.com/6/
User avatar
Toorbough ULL-Zeveigh
100 MW
100 MW
 
Posts: 2531
Joined: Fri Feb 09, 2007 3:02 am
Location: Marlboro

Postby xyster » Thu May 24, 2007 7:44 am

I think there needs to be a term or phrase that describes an ebike configuration like this where the battery module sits behind the seat tube on a stretched frame.


You're describing a "FEW BATTS" bike, only good for carrying a few batts.

FEWBATTS: Frame Extended With Batteries Attached To Telescoping Seatpost


:D
Ebike: 5304/20", 72V 35A controller, 33AH 80V 20s15p (18650 sized cells) DIY lithium-ion pack
http://endless-sphere.com/forums/viewto ... 47&start=0
Scooter: '06 Stealth s1000, 48V 30A, 4x10ah SLA
http://endless-sphere.com/forums/viewtopic.php?t=148
Ebike: '06 Currie Mongoose, 32V 35A, 32V 22AH hybrid SLA/Li-ion pack
http://endless-sphere.com/forums/viewtopic.php?t=1010
User avatar
xyster
1.21 GW
1.21 GW
 
Posts: 3580
Joined: Tue Jan 02, 2007 8:39 pm
Location: Visualize Rural Sheep

Postby Toorbough ULL-Zeveigh » Thu May 24, 2007 8:02 am

Man, how do you come up with them so fast!?
It even has the benefit of sounding like it might be chinese.
Mark this day on the calender.
I think your acronym may even make it's way to Wiki & become official.

:lol:
Last edited by Toorbough ULL-Zeveigh on Thu May 24, 2007 8:08 am, edited 2 times in total.
the pessimist engineer sees a glass that’s twice as big as it needs to be.
the optimist engineer sees that the glass has a 100% safety tolerance.
http://what-if.xkcd.com/6/
User avatar
Toorbough ULL-Zeveigh
100 MW
100 MW
 
Posts: 2531
Joined: Fri Feb 09, 2007 3:02 am
Location: Marlboro

Postby AviationMetalSmith » Thu May 24, 2007 8:06 am

Toorbough ULL-Zeveigh wrote:So how fast have you gotten within that one mile?
That farm-triangle must act like an anti-fairing.
Any plans to go beyond the stock power level? :twisted:
I think there needs to be a term or phrase that describes an ebike configuration like this where the battery module sits behind the seat tube on a stretched frame. A lot of the chinese makes seem to favour this layout.


Just one question about the rack, did it come with the long front stays like that or did you have to fab them? I've been looking for something like that which would accomodate the reduced-angle triangle of most newer bikes.


The Lafree still has it's original 24 volt batteries and controller. The motor cuts out at 18 MPH.

I had a loose wire (connection). The LBS looked at it and tightned the connection, now it's running better.

The rack was made by Giant, specifically to fit the Lafree Sport frame. The stays were on it when it came out of the box.

I am thinking about upgrading to 36 volts, but it's not a priority of mine.

As for speed, there are plenty of steep hills to ride down around here.
AviationMetalSmith
100 µW
100 µW
 
Posts: 8
Joined: Thu May 17, 2007 7:51 am
Location: Long Island, New York

Postby xyster » Thu May 24, 2007 1:23 pm

Man, how do you come up with them so fast!?
It even has the benefit of sounding like it might be chinese.
Mark this day on the calender.
I think your acronym may even make it's way to Wiki & become official.


72 volt cybernetic brain implants, neuronal connections wrapped with superconductive bio-wires :D
Ebike: 5304/20", 72V 35A controller, 33AH 80V 20s15p (18650 sized cells) DIY lithium-ion pack
http://endless-sphere.com/forums/viewto ... 47&start=0
Scooter: '06 Stealth s1000, 48V 30A, 4x10ah SLA
http://endless-sphere.com/forums/viewtopic.php?t=148
Ebike: '06 Currie Mongoose, 32V 35A, 32V 22AH hybrid SLA/Li-ion pack
http://endless-sphere.com/forums/viewtopic.php?t=1010
User avatar
xyster
1.21 GW
1.21 GW
 
Posts: 3580
Joined: Tue Jan 02, 2007 8:39 pm
Location: Visualize Rural Sheep

Postby fechter » Thu May 24, 2007 4:34 pm

xyster wrote:
72 volt cybernetic brain implants, neuronal connections wrapped with superconductive bio-wires :D


And an occasional zap from my big capacitor :twisted:
"One test is worth a thousand opinions"
User avatar
fechter
100 GW
100 GW
 
Posts: 10038
Joined: Sun Dec 31, 2006 3:23 pm
Location: California Bay Area, USA

Giant lafree

Postby kisshu » Thu Jun 07, 2007 4:08 pm

there now that type of design along the lines of zvo machine x etc just makes more sense to me - to have gears! i would like to see other ev bike makers get into designing more like hybrid motorbikes. when they started it was all about adapting motors to regular bike frames - i would like to see more bike frames designed around drive systems and motors
- cvt and automatic gearing.

it shouldn't cost much more to desing a good ev frame and then allow the user to customize it with their budget and allow for engine upgrades etc

can the engine be changed to a 600 to 1000 watt ? watt kind of modifications would it require?


even this type of moped seems more practical
http://cgi.ebay.com/X-Treme-Electric-Bi ... dZViewItem
than a 12-$1500 ebike. seems like you could put a morpowerful motor on it too.
User avatar
kisshu
100 mW
100 mW
 
Posts: 47
Joined: Wed Jun 06, 2007 3:12 pm
Location: CT, USA

engine mount

Postby kisshu » Thu Jun 14, 2007 11:40 am

could you show us some inside pics of the motor mounting and drive - i'm wondering how the motor might be upgraded?

thanks
User avatar
kisshu
100 mW
100 mW
 
Posts: 47
Joined: Wed Jun 06, 2007 3:12 pm
Location: CT, USA

Re: Giant LAFree Sport

Postby jlincoln » Mon Oct 25, 2010 7:38 am

Hello, my grandfather has a bicycle like this and he was wondering if you had any information regarding this bike. If so please contact me at ajk85@frontier.com
jlincoln
1 µW
1 µW
 
Posts: 1
Joined: Mon Oct 25, 2010 7:31 am


Return to E-Bike General Discussion

Who is online

Users browsing this forum: BlueSwede, danjpendleton, latecurtis, motomech and 11 guests