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by dogman dan
Dec 09 2019 8:23am
Forum: E-Bike General Discussion
Topic: Regen
Replies: 41
Views: 778

Re: Regen

Uhh,, where did I say 500 pounds up the hill? Or geared motor? Sorry if I wasn't very clear, I only know about what I did, and worked. That was a slow wind 500 w rated DD motor. 9 continent type if you will. And it went 400 pounds, in 26 wheel , and about 1200w max , fine. 500 pounds and the rockies...
by dogman dan
Dec 09 2019 8:15am
Forum: E-Bike General Discussion
Topic: Townie host bike rethought.
Replies: 5
Views: 166

Re: Townie host bike rethought.

I got the impression he had the seat at the bottom on the trek.

The other solution, often expensive, is just get a bent.
by dogman dan
Dec 09 2019 8:13am
Forum: E-Bike General Discussion
Topic: Max comfortable width of pack mounted in triangle
Replies: 21
Views: 395

Re: Max comfortable width of pack mounted in triangle

True enough, wrong fit bike will give you hand and wrist problems. But so does just getting old. :roll: But yes good advice not to pedal hard much on bikes that are making you pedal bowlegged. That's why I couldn't, or at least wouldn't pedal much at all on those dirt bikes with 7 inch wide battery ...
by dogman dan
Dec 09 2019 8:07am
Forum: E-Bike General Discussion
Topic: 130mm Rear Hub Motor?
Replies: 1
Views: 79

Re: 130mm Rear Hub Motor?

You can safely flex out the frame another 5 mm to cram in a 135 mm motor. 3 mm per side will not crack the frame, it just flexes it, rather than putting a bend in the alloy frame. So just pick a motor, and give it some grunt to stuff it in when you mount it. Don't get the car jack out, and try to pu...
by dogman dan
Dec 09 2019 8:00am
Forum: Battery Technology
Topic: Can heating up battery give longer distance?
Replies: 17
Views: 599

Re: Can heating up battery give longer distance?

Re the original question, using the batteries energy to heat it is why your capacity/range is less when its very cold. No free energy in this world, etc. As that battery gets near freezing, it gets terrible saggy, using all its energy up in extra internal resistance. And its costly in watt hours for...
by dogman dan
Dec 08 2019 8:41am
Forum: E-Bike General Discussion
Topic: Max comfortable width of pack mounted in triangle
Replies: 21
Views: 395

Re: Max comfortable width of pack mounted in triangle

I had off road bikes set up much like Dogs. I did not pedal more than a handful of strokes a mile. Rode great standing up, pinching the saddle between my thighs. I rode it exactly like I used to ride my trials MC. But sit down and try to really pedal, It was too bowlegged for me to do it for say, 50...
by dogman dan
Dec 08 2019 8:35am
Forum: E-Bike General Discussion
Topic: Townie host bike rethought.
Replies: 5
Views: 166

Re: Townie host bike rethought.

Yeah, kind of hard to find people selling their favorite bike. And a bit pricy new. There is a very similar pedal forward bike that is cheaper. The Schwinn Candis. When my garage burned it took my wifes beloved townie. But with the insurance money we were putting a lot of the extra cash into upgrade...
by dogman dan
Dec 08 2019 7:59am
Forum: E-Bike General Discussion
Topic: Regen
Replies: 41
Views: 778

Re: Regen

One big motor, and 2000w into it, will get 500 pounds up the rocky mountians. Ben there, done it. Talking long hills, and mostly, they max out at 8%. Short hills get much steeper though. Two 1000 w motors will also do it, but I have not personally built that. It was just so much simpler to run a 530...
by dogman dan
Dec 07 2019 8:41am
Forum: E-Bike General Discussion
Topic: Is a leisurely pedal cadence possible going 25 mph on an ebike?
Replies: 8
Views: 264

Re: Is a leisurely pedal cadence possible going 25 mph on an ebike?

If nothing else, a 48 t front ring should fit, or perhaps a 52, if you can find the right one to fit your existing crank. Road crank will likely not have enough offset, and rub the frame.

But a 48t will help, as would learning to accept cruising at 22 mph.
by dogman dan
Dec 07 2019 8:37am
Forum: E-Bike General Discussion
Topic: Regen
Replies: 41
Views: 778

Re: Regen

It only takes about 100 miles of pedaling with heavy resistance to recharge a typical bike battery.. Or, you could just pedal 200 miles without regen on, for the same effort. What you want is not regen. Get a planetary geared motor that won't resist while you pedal with it off. Then tow a relatively...
by dogman dan
Dec 05 2019 7:14am
Forum: E-Bike General Discussion
Topic: Max comfortable width of pack mounted in triangle
Replies: 21
Views: 395

Re: Max comfortable width of pack mounted in triangle

5 inches is wide, but should be tolerable. 6 inches can be stood by some, just depends on if you pedal, or faux pedal, or no pedal. At 6 inches, you will be pedaling quite noticeably bowlegged.
by dogman dan
Dec 04 2019 7:38am
Forum: E-Bike General Discussion
Topic: Torque arm suggestion for horizontal dropouts?
Replies: 7
Views: 567

Re: Torque arm suggestion for horizontal dropouts?

looks good, as the wheel turns rolling forward, the axle will try to rotate the other way, so your picture has the modified TA pointing the right direction. If the nut won't fit in that slot when you assemble it, file the frame down just a bit, till its flush with the torque washer, or stack additio...
by dogman dan
Dec 04 2019 7:30am
Forum: E-Bike General Discussion
Topic: Rear hub wheel balance issue.
Replies: 7
Views: 286

Re: Rear hub wheel balance issue.

First, I'd try letting out the air, and re inflating the tire. You might have the tube stuffed in there funny, or the tire not sitting on the bead right. If there is slime in the tube, then it will do that till you ride it far enough to have the slime spread out better in the tube. And lastly, bear ...
by dogman dan
Dec 04 2019 7:24am
Forum: E-Bike General Discussion
Topic: Reputable/reliable 48v batt sellers for BBSHD build
Replies: 21
Views: 447

Re: Reputable/reliable 48v batt sellers for BBSHD build

Multiple batteries? I've been very satisfied with Luna's 12ah wolf pack. Its hanging in there fine despite some pretty high amps use. I love the way this one is all sealed up in epoxy, virtually water proof, shake proof, drop it proof. If that's enough for most rides, you could do something else for...
by dogman dan
Dec 02 2019 8:30am
Forum: E-Bike General Discussion
Topic: Helmet bike mounted cameras
Replies: 18
Views: 1181

Re: Helmet bike mounted cameras

Was in Walmart the other day, and saw a pretty cool dash cam for 15 bucks. The neat feature was it turned on automatically when it sees movement, and then loops the film on a sd card. So all you'd have to do is keep it charged, and put it on the bike each ride. A go pro would be a big hassle, starti...
by dogman dan
Dec 02 2019 8:26am
Forum: E-Bike General Discussion
Topic: Torque arm suggestion for horizontal dropouts?
Replies: 7
Views: 567

Re: Torque arm suggestion for horizontal dropouts?

Yes, make a steel plate that fits inside that recess, then drill a flat sided hole in it for the axle. Drill small holes, then finish with a hand file. The hole needs to be closed, not u shaped. Or, modify a regular front torque arm, giving it the exact shape of the big recess in the dropout. Line u...
by dogman dan
Dec 02 2019 8:21am
Forum: E-Bike General Discussion
Topic: Circuit analysis of a cheap BMS, and why you shouldn't use one
Replies: 30
Views: 1007

Re: Circuit analysis of a cheap BMS, and why you shouldn't use one

Sounds like you may have explained what happened when my house burned. All we know is a battery left on the charger too long burned the garage down. But I have long suspected the bms failed me somehow.
by dogman dan
Nov 27 2019 7:49am
Forum: E-Bike General Discussion
Topic: About to click buy. Am I missing anything, or doing something wrong?
Replies: 17
Views: 539

Re: About to click buy. Am I missing anything, or doing something wrong?

Can't say about the battery dealer. The real problem is the battery itself. I'll keep it short and just say I learned not to charge in my house or garage. Chances are you get no problems, its just the results of a really rare problem that sucks. Mid drive a great choice for a road bike like that. An...
by dogman dan
Nov 25 2019 7:39am
Forum: E-Bike Technical
Topic: hanging a battery
Replies: 11
Views: 622

Re: hanging a battery

Your best option may well be a rear rack, and mount the battery there. On the downtube, especially with no fender, its not a great place to hang a battery and ride when its wet. A rack can be turned into a fender, with a scrap of plastic, at least keeping the wheel spray off it.
by dogman dan
Nov 25 2019 7:32am
Forum: E-Bike General Discussion
Topic: Stackable power wall kit with 18650 on ebike
Replies: 6
Views: 643

Re: Stackable power wall kit with 18650 on ebike

Hmm, interesting. Little disc of lead in each contact, tightening the spring pressure and improving the resistance?

Maybe solder blob on each spring?

Seems like it could be a great thing for those with a pallet of laptop packs.
by dogman dan
Nov 25 2019 7:21am
Forum: E-Bike General Discussion
Topic: How fast can my 250W chinese motor go?
Replies: 23
Views: 1031

Re: How fast can my 250W chinese motor go?

To clarify some on the above posts. First, you should see some improvement with the new controller, if it has higher amps than the old one. Speed is limited several ways. One is the motor, motors have different turn windings, where a 12 turn motor is slow, and an 8 turn quite fast,,, potentially. So...
by dogman dan
Nov 24 2019 10:09am
Forum: E-Bike Technical
Topic: Measuring a battery's health
Replies: 6
Views: 380

Re: Measuring a battery's health

You should get close to the batteries stated spec ah when you discharge it at 180w. Even a pretty toasted battery can do amazing good, at that low a c rate. If you get way less, like 80% of stated at 180w, its safe to say you will see real poor performance at 2000w. You will need to come up with at ...
by dogman dan
Nov 24 2019 10:05am
Forum: E-Bike General Discussion
Topic: Two questions on EVG 24v
Replies: 5
Views: 243

Re: Two questions on EVG 24v

The one thing about an EVG is that the hub motor on it is much louder than most. However, this is loudest when running top speed, at about 15-20 mph. When running more like 5 mph, not so loud. But honestly, don't get the EVG unless you are looking at a hundred bucks or less. Nice frame to put a mode...
by dogman dan
Nov 19 2019 7:52am
Forum: E-Bike General Discussion
Topic: ? Performance of a modified eBike
Replies: 5
Views: 536

Re: ? Performance of a modified eBike

I would ride that thing exactly the way it was designed to be ridden. Relatively slowly, in deep sand or snow.

And then for faster riding, I'd get this. Or spend just as much on a superb DH bike, and powerful rear hub motor.
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