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by **amberwolf** » Wed Dec 28, 2011 3:38 am

Several good methods documented in various places on the forums; a search for "precharge" will find at least some of them.

by **jana** » Sat Jan 07, 2012 9:31 am

Finally my wheel was finished yesterday. It was crazy expensive but with a Mavic 721 rim and custom spokes it is supposed to be bullet proof. The stock rim and spokes are very low quality.
I put everything together really quick just to get a test ride. I will have to tidy it up, make everything waterproof et cetera.

Result was good. I had a 10 mile trip with my 3 year old daughter in the bicycle trailer.
Power was good, but because of snow and safety concerns I was only going like 15 mph most of the time. Pretty sure top speed with 12 cells LIPO is at least 25 mph.
Grip with the spiked tires was also excellent.

The weather:

The bike after the ride (1997 Kona Kula):

Now charging - hoping for a solo-trip tonight

by **jana** » Sun Jan 08, 2012 6:32 pm

I had a great ride on snowy roads last night. Bike is awesome!
Had some trouble with the throttle getting stuck, but otherwise performance is very good.
After about an hour long ride I had used a little more than half of the capacity – 4200 mAh.
I did pedal quite hard and speed was around 20 mph most of the time. Trip was maybe 20 km?

This evening I made some covers for the batteries – had some pipe left over from installing an air condition unit that was a perfect fit for the batteries.

I also used this pipe to make a battery mount on the bike. I connected it to bottle-holder bolts, using some metal plates to make it stronger. Used some strips also. It seems very robust.

Still lots to do with it:
-waterproof / tidying up cables
-fixing / painting battery mount
-torque arms
-4 more cells  (must find out if controller can handle it) – already have the battery

by **jana** » Sat Jan 28, 2012 5:47 pm

Opened one end of the controller today and found this:
Fets: 75V ( I think I count 18 of these)
Capacitors: 63V 470 uF (4 of these)

Could I swap the caps with 100V ones like these?
http://www.ebay.com/itm/470uF-100V-105C ... 3cba981222

See if i get this right: Now the max voltage is 63V --> 63 / 4.2 --> max 15 cells Lipo
Will 16 cells definetly kill it?

If I swap the caps the Fets will be limiting: 75V--> 75/4.2 --> 17.8 --> max 17 cells Lipo

Appreciate your input on this :roll:

by **sangesf** » Sat Jan 28, 2012 6:13 pm

Considering I know nothing about FETs and CAPs, I'd like to find out too..
18Fet controller tho? It must be HUGE!

by **jana** » Mon Jan 30, 2012 8:05 am

You can see a picture of it on the bike a couple of posts up.

by **jana** » Thu May 31, 2012 2:53 am

RIP:

Uploaded with ImageShack.us

by **amberwolf** » Thu May 31, 2012 3:07 am

A little duct tape and it will be just fine, ready to return to DH racing use. :lol:

Seriously, though: what happened?

by **jana** » Thu May 31, 2012 11:17 am

Nothing really. Took off the snake skin protector and I noticed it.

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