Scott with central 8Fun

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twingolo   1 mW

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Scott with central 8Fun

Post by twingolo » Jul 27 2012 11:37am

Hi,

I'am building another one Ebike (for my syster this time),

not a beast, but efficient and easy to use.

The description:

Motor : 8FUN 24v sensored
Battery : 36v 9 AH 12s2p (4 x Turnigy lifepo4 4500mah)
Activation : PAS
Controller : 36v 15A : 540w
Theoric Speed : 45 kph.
Freehheel : on the crank

Just a CAD design before receving the differents parts.

Image

Image

Image


more pictures later

Personnal message to Adam: great jobs on your hand made frame.

Fred
not buying too much, think building...

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bzhwindtalker   1 MW

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Re: Scott with central 8Fun

Post by bzhwindtalker » Jul 27 2012 1:34pm

Looks good Fred! how have things been? Using a hub like that gets the best of both worlds, but the chain and sprockets seem to be the weak link. Will the fork clear the battery?

Adam

John in CR   100 GW

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Re: Scott with central 8Fun

Post by John in CR » Jul 27 2012 2:39pm

No room for front suspension travel, so put the batteries in the triangle, and focus primarily on the drive. Your sister has a great brother. It sounds like a great project.

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amberwolf   100 GW

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Re: Scott with central 8Fun

Post by amberwolf » Jul 29 2012 1:52am

As noted above, your photo's filename will come true if you use that suspension fork and that box at the same time, as soon as you hit any decent bumps:
implantation.jpg
implantation.jpg (77.6 KiB) Viewed 7434 times
Otherwise, it sure looks like a neat idea.

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twingolo   1 mW

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Re: Scott with central 8Fun

Post by twingolo » Jul 29 2012 6:25am

Small or big bump, nô problem, this is a CAD picture on a phone picture, the scale is not respected.
There is enought space with this tire.
not buying too much, think building...

oigoi   1 mW

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Re: Scott with central 8Fun

Post by oigoi » Jul 29 2012 10:31am

How will you put the sprocket onto the rh side of the 8fun motor? These motors can have disk brake mounting holes and you can buy bolt on sprockets but the threaded holes for mounting a disk brake are on the LH side?

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twingolo   1 mW

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Re: Scott with central 8Fun

Post by twingolo » Jul 29 2012 4:21pm

The hub motor modified:

Image

This one is geared and have a freewheel built-in, but no hole for a disk brake.

The 15 thooth sprocket is bolted on the side of the motor thru an home made adaptator.
not buying too much, think building...

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twingolo   1 mW

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Re: Scott with central 8Fun

Post by twingolo » Aug 26 2012 9:20am

The come back with new picture of the parts on the bike:

Tutorial for the switche on an hydraulic brake : http://endless-sphere.com/forums/viewto ... 28&t=42477

Image

Image

Motor and transmition:

Image

amberwolf, you were right, first test on a medium bump, front tire is limit to touch the box, i have to set the fork harder.
not buying too much, think building...

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crossbreak   100 MW

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Re: Scott with central 8Fun

Post by crossbreak » Aug 26 2012 9:30am

amberwolf, you were right, first test on a medium bump, front tire is limit to touch the box, i have to set the fork harder.
plz film your sister when she drives over the first curbstone :D :D :D

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bzhwindtalker   1 MW

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Re: Scott with central 8Fun

Post by bzhwindtalker » Aug 26 2012 9:39am

Very nice! I see you modified the axle, I have a lot of problem on my "500w" BPM mid drive due to the ridiculous axle flats (12mm avec un meplat à 10mm comment transmettre du couple avec ca :shock: ) that's a very good level of intergration, but yeah the front tire clearance is asking for trouble ;)

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spinningmagnets   100 GW

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Re: Scott with central 8Fun

Post by spinningmagnets » Aug 26 2012 3:01pm

WOW! Beau travail, bravo! Please post if you run into any problems, and what you end up doing to fix everything.

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Whiplash   100 MW

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Re: Scott with central 8Fun

Post by Whiplash » Aug 27 2012 2:16pm

You likely could use some of those head sets with the offset to increase the fork angle and give more clearance, plus it would handle better at the higher speeds!
Power is a fascinating thing, the more you have, the more you want, but the real power is having the restraint not to use it all at once...............Um...Yeah..

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boostjuice   10 kW

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Re: Scott with central 8Fun

Post by boostjuice » Aug 29 2012 10:15pm

....or upgrade to a 200mm Fork, thereby raising the clearance gap and set up compression to use about half of its travel. Personally I find most XC bikes (at higher speed) feel better with the resultant shallower head angle and raised head-tube.

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twingolo   1 mW

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Re: Scott with central 8Fun

Post by twingolo » Aug 23 2013 7:38am

Hello,

I finaly finished my ebike, the result is pretty good and the performance are better than i was hoping.

Max speed : 47 kph

i let you see some pictures...

Bye


Image

Image

Image

Image

Image
not buying too much, think building...

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christerljung   100 W

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Re: Scott with central 8Fun

Post by christerljung » Aug 24 2013 1:57am

That's a really beautiful build! Seems like the best ebike builders comes from France :mrgreen:

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twingolo   1 mW

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Re: Scott with central 8Fun

Post by twingolo » Sep 04 2013 5:17am

Thanks christerljung,

new speed record : 56 kph

In descent of course
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pendragon8000   1 MW

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Re: Scott with central 8Fun

Post by pendragon8000 » Sep 04 2013 6:25am

Very nice looking. Are you happy to run the fork with limited stroke? For on road with lots of preliad it would be a great ride IMO.
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newguy   10 µW

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Re: Scott with central 8Fun

Post by newguy » Sep 06 2013 9:02am

This is the best build I've seen yet! well done! Did you convert the hub motor to be static with spinning axle? or does the hub spin and the gear is mounted to the hub? Any welding involved in the build? Really wanting have a go at a similar build now :)

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twingolo   1 mW

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Re: Scott with central 8Fun

Post by twingolo » Sep 09 2013 5:10pm

Hi,

The axle is static, the hub is spinning around like in a classic wheel.

You don't need to weld anymore, all is assembled by stanless screw.

The fork have to be locked in road position, its ok if you don't want to practice downhill.

Fred
not buying too much, think building...

newguy   10 µW

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Re: Scott with central 8Fun

Post by newguy » Sep 12 2013 10:07am

Thanks Fred,

How did you form the steel, was it CNC'd? or was it cut by hand?

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crossbreak   100 MW

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Re: Scott with central 8Fun

Post by crossbreak » Nov 02 2013 6:51pm

probably CNC Laser cut. You can order laser cut sheets online, just upload your 2D dxf files, select material, pay and they will ship your custom sheets. I like cutworks the most. A sheet of that size would probably cost about 200€ if you order only one. It makes more sence to buy more, which will be a lot cheaper... as with everything that's custom made :mrgreen:

thx twingolo for posting this, I build something very similar, but with a converted Hub (turning axle). Cooling suffers with so much "fairing", but your nice looking built encouraged me for some more encasement of motor and battery. A good heatsink will do the job even if some of the hubs housing does not feel the wind.

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jateureka   10 kW

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Re: Scott with central 8Fun

Post by jateureka » Nov 11 2013 6:32am

Very nice looking mid drive build.
Did it turn out cheaper than the Scott e-Spark?
Attachments
scott espark 2.jpg
Scott e-spark
E-bikes: Bafang 8FUN; Mac; Ezee; FreeGo; Aprilia 7s LiPo; eLation V2; TerraTrike recumbent
E-motorbikes: ZEV 7100 LR scooter, 84V 60Ah LiFePO4.
ZERO 2011 S motorcycle, 51.8V 70Ah LiMno2, 2012 headlight, Kilovac EV-200 contactor
E-mower: EGO 56V mower & line trimmer

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