Why am I building another e-bike?
LI-ghtcycle wrote:I'm really curious since you mention using a drum brake on the front, I want good stopping power, as long as it is comparable to a good V-Brake up front, it would be fine, do the S/A Drum brakes give about that good of stopping power?
StudEbiker wrote:LI-ghtcycle wrote:I'm really curious since you mention using a drum brake on the front, I want good stopping power, as long as it is comparable to a good V-Brake up front, it would be fine, do the S/A Drum brakes give about that good of stopping power?
I don't know about the Shimano, but the S-A drums have gotten good reviews here on ES.
wildharemtbkr wrote:Nice, I want to see how some one else does it. I have not used mine much due to poor batteries. I was going to buy some lipo's but wound up buying a couple little razor mx350's for my kids instead. I bought lead acid replacement batteries for them, what a joke. 8-10 hours to charge for 30 minutes of ride time? That's a hit with the kids. Now I need to buy 3 or 4 sets of lipos!!
If you go with the cyclone style get the one with daul freewheels. No need for the freewheeling front sprocket that way, and no extra moving chains. Put it further back and you won't need to widen the bb spindle either. Or better yet the drive like on the Dogatti would be perfect!! I wonder how much Ben would charge for a couple of those? Anyway good luck, looking forward to your progress! oh the small wheels are kinda scary at high speed, I have had mine to almost 50mph, coasting downhill (big hill). I think the V-brakes are plenty for the little wheels.
StudEbiker wrote: . What is a Dogatti? Any pictures of what you are speaking of? Would you be willing to take some other pictures of your set up if I needed to see something closer?
wildharemtbkr wrote:That is NICE!! Yes I have been here, just lurking. I will help in any way I can. I would really like to redo mine. The concept is great, but there are a few flaws. I really didn't like the extra drag caused by the #25 chain. I guess it is too heavy and hard to pedal, not enough epower for the weight. I would always just hop on my other bikeE, it is light and fast enough just pedalling. It did climb quite well with assistance of course, 350 watt remember, and it worked good for my wife to pull the kids in the trailer. I would want it lighter (lipo and rc) with less drag (daul freewheels on the mid-drive) and more power 1500-2000 watts, with the gears set up right it could climb any paved hill you could find and run 45mph on the flats, all while being able to assist at any time! Your bike weighs about 34 lbs, with 7-10 lbs of battery and about 5-8lbs of motor and drive, it could be quite the nice E-bike E. The riding position on the Bike E is great, kind of chopper like.
LI-ghtcycle wrote:I'm a little confused, why does one need anything more than a fixed cog (motor) and the freewheel stacked on top of it on the RH side? Wouldn't that allow for you to have a freewheel for the pedals and would that not work as a conventional set-up, or does it cause a problem when the motor is turning and the pedals are not?
LI-ghtcycle wrote:Well, since you are getting a cyclone, some of them already have a dual freewheel set-up as I described, maybe depending on which one you get it has a different "gear head" that allows for this, and if yours doesn't, then it could be a matter of getting a separate gear head that does.
Here is a gear calculator that really works well:
you can always backwards calc. the kv of the motor as long as you know what speed it should produce in a given wheel at a given voltage with the gearing.
The calc I gave you a link to allows you to put up to 3 stages of reduction as well as motor speed, tire size and individual gears of both the drive (motor) gears and the driven (jack shaft or wheel gears).
I saw somewhere that had the kv of the cyclone motors, I want to say it was around 75kv, but I'm not certain.
StudEbiker wrote:That is some really helpful info. Thank you. I have another question for you though. I can't see very well from your pictures how the large #25 sprocket is attached to the backing plate (the same plate the motor is attached to). It might be helpful to see a closer picture of that.
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