BL 36 New conversion
Just finished converting my Bridgestone MB2 mountain bike to
use the BL 36.
Took it out on a 1.5 hour ride, went about 25 miles before the batts ran out.
They are the extended range 12.5Ah SLAs.
The bike is fun.
I did pedal too, so that will explain why the batts lasted longer.
I will post some pics later, dont have time now.
Thanks to everyone for their advice.
I used hot glue to seal any parts and connections that might get wet.
I need to find a bag for the controller though, as it doesnt fit in the batt bag.
Also, will be looking to doe LiFePO4, soon.
For now I will play with the SLAs.
Overvolt! Overvolt! :D
Um...technically you could still pedal?
Put a bigger front chainring on the bike.
Question: I see a comment about the motor direction. I have yet to put my kit/bike together and the (altered directions suggest putting the BD36 wires out the left side.
You guys are saying this is wrong?? Now I am confused. Alaso, should I use flat washers or lock washers to fill the fork drop-out 'lips'?
Thanks ahead of time
Flip a coin and put the wheel on the bike, the chance of being right is about the same as using the directions. One of mine is a lefty and one a righty. You can then test it to see which way the wheel spins, before you wire up the whole bike. Who knows maybe by now the directions match the wheel in the box. Lock washers may be better to fill the cup on the forks. They tend to be narrower. make sure the cup is filled or filed away, one or the other. too big a washer will bend later and let the axle spin and cut the wires. If both wires cut, and it shorts, there goes the controller too.
Hmm, pretty clean. Bet it's pretty well balanced with the hub on the front and the batteries on the rear.
Yeah, 26mph would be downhill on 36V. I could hold 27mph with 48V and flat ground.
That flicking, now that I think about it, makes me think that the magnet/sensor was placed badly. It measures how many times it goes by in a certain period of time, so if it couldn't get a consistent reading it would behave like that. Try getting the magnet and sensor closer together.
I used a wireless Bike Computer from Sigma. The magnet and sensor was only 5 to 10mm apart. The Wheel Size I entered was 2205mm for my 700C wheel. Pedaling alone would give me a correct reading of MPH. But once I used the throttle the readings where all over the place. Not sure if the hub motor was causing interference with the wireless signal from the sensor to the handle bar receiver or the magnet to the sensor.
So, I recently purchased the Stand Alone Cycle Analyst. It has a wired sensor that attaches to the fork and a magnet that attaches to the spoke of the rim. At first, I couldn't get a reading of MPH because the sensor and magnet distance was too far apart. The only way to remedy it is put a spacer of some sort between the sensor and the fork to extend it closer to the magnet. My solution was I added another rare round magnet (stacking) on top of the existing magnet. The magnet they provide isn't that strong. The CA magnet claims it's a rare earth magnet but not as strong as the one I put on.
36 volts on flat ground = 21.8 mph
48 volts on flat ground = 26.7 mph
The difference in 5 mph is really noticeable. I feel like I'm walking with 36 volts vs. sprinting with 48 volts.
My commute to work is only 9 miles and at 22 mph (36V) I can get there in ~35 minutes vs. ~30 minutes having the extra battery and weight (48V) at 27mph.
5 minutes doesn't seem that much of a savings. However, traveling the extra 5 mph is kind of fun. But lugging the extra 12Ah SLA battery causes unnecessary weight on the back wheel and you can feel the bumpy roads and I worry that my back tire will break another spoke or pop the wheel.
48 volts is fun, but I have broke spokes carrying 36v of SLA's. They were said to weigh 25 pounds but my scale said 33! Adding another made it 44, and even for my trike it was a lot of weight when you hit potholes or big humps from street cracks. Lifepo4 made a huge difference. Definitely faster just since its lighter, and I don't even notice the weight on the seat post rack.
I'd replace them caps if I was you. Hot off the charger, two DeWalts in parallel should be over 66V. And when caps go, they go with a bang. And if they blow short, it'll fry something and also turn your motor into a pretty powerful brake without warning. Caps are cheap (two cost me less than a dollar) a new controller (and potentially face) isn't.
Heh. 30mph is nuttin'. I was almost always a little above that speed on the Packcycle. I would have been going even faster, but I'd need moar voltage. :P
The wires on my bd-36 come out on the right hand side (when sitting on the bike and looking at front wheel) I think the BL-36 is the opposite. Either that or I have a brushless. I'm still a little confused and can't quite tell brushed and brushless apart.
Brushed only has two wires coming out of the motor. Brushless has more for hall sensors.