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by dogman dan
Nov 25 2020 6:25am
Forum: E-Bike General Discussion
Topic: Hill climbing commuter build
Replies: 23
Views: 753

Re: Hill climbing commuter build

What I actually said about a thousand times was aimed at certain people. Serious cyclists that love to pedal 2000 miles a year already. They likely have multiple bikes anyway, and will still want to pedal that one they spent a fortune on, because it is the lightest one. So don't ruin your favorite b...
by dogman dan
Nov 24 2020 7:43am
Forum: E-Bike Technical
Topic: Geared hub motor getting noisy....
Replies: 10
Views: 225

Re: Geared hub motor getting noisy....

Ignore it, given your situation. The gears will be fine, but make more noise the faster you go. More grease could help, but its not dying in there, unless exceptionally noisy.
by dogman dan
Nov 24 2020 7:40am
Forum: E-Bike General Discussion
Topic: Hill climbing commuter build
Replies: 23
Views: 753

Re: Hill climbing commuter build

4000 feet is a big hill. Thats a real mountain! That could use up some brakes. But a hub motor adds more weight going back up, and you will be heavy enough already. And it will drag all the while, when not using it. Good disk brakes with the very best pads would be the way I'd go, not because they b...
by dogman dan
Nov 24 2020 7:24am
Forum: E-Bike General Discussion
Topic: Crystalyte 404 hub motor
Replies: 10
Views: 909

Re: Crystalyte 404 hub motor

Yeah, exactly what I was fishing for. Go fast not the best idea for push trailers, and then if to go slow, you would want to pick a slower, or rather just more normal 408 wind vs a fast motor. With less load, a 404 would be a good hill climber in 16" wheel, able to take about 1500-2000w for a d...
by dogman dan
Nov 24 2020 7:14am
Forum: Battery Technology
Topic: Parallel connection Lipo with Lithium Ion
Replies: 9
Views: 152

Re: Parallel connection Lipo with Lithium Ion

The bms can work, or use low voltage alarms to wake you up to when its time to slow down, and limp home on just the lithium ion chemistry pack. The lipo, if this was not made clear enough to others reading, will reach 0% at a higher voltage than the other pack. So you need some way to disconnect it ...
by dogman dan
Nov 23 2020 7:54am
Forum: E-Bike General Discussion
Topic: Your thoughts on frames and riding positions?
Replies: 38
Views: 959

Re: Your thoughts on frames and riding positions?

I'm sure I could do a 6 hour day in that seat. My semi bent, more of a kitchen chair type position, 30 min max. It just kills my back. Most comfortable trike I ever rode, the fully bent sun tadpole trikes with the lay down seats. The Fat tad was nice for the cushy tires. The one time I rode a really...
by dogman dan
Nov 23 2020 7:42am
Forum: E-Bike General Discussion
Topic: torque arms for using regen?
Replies: 24
Views: 709

Re: torque arms for using regen?

This thread long enough now I don't know for sure what I thought I read. I thought I saw you say the flats were somewhat rounded already. Tight fit will work fine. Loose fit won't, whatever the design is. Pinch fit, tightest there is. The main thing I don't like about the design is that its just a r...
by dogman dan
Nov 23 2020 7:36am
Forum: E-Bike General Discussion
Topic: Crystalyte 404 hub motor
Replies: 10
Views: 909

Re: Crystalyte 404 hub motor

Do you want the push trailer to go fast? or push a lot of weight?
by dogman dan
Nov 23 2020 7:23am
Forum: E-Bike General Discussion
Topic: Battery Crash Protection
Replies: 13
Views: 374

Re: Battery Crash Protection

Yeah, coroplast inside the aluminum would be ideal. Not metal touching cells. I used to do a lot of searching around for just the right aluminum or steel box, depending on the type of cells, shape of the battery. So the end result would be metal box, with coroplast liner box, plus often some foam as...
by dogman dan
Nov 22 2020 7:37am
Forum: E-Bike General Discussion
Topic: torque arms for using regen?
Replies: 24
Views: 709

Re: torque arms for using regen?

Some how I missed you were having them made. IMO, the grub screw will end up being decorative, of little use unless it set into a slot machined into the axle. But still, small, very easy to break. Design a no weld, robust plate that bolts the bike somehow, which pinches the axle. All the Gurus here ...
by dogman dan
Nov 22 2020 7:27am
Forum: E-Bike General Discussion
Topic: Battery Crash Protection
Replies: 13
Views: 374

Re: Battery Crash Protection

I made protective boxes out of coroplast, the plastic cardboard used on political signs and such for years. Worked real good, many crashes riding dirt with vulnerable pouch batteries in a bag somewhere on the bike. Other materials would be stronger, thin aluminum plate, or even steel sheet like roof...
by dogman dan
Nov 19 2020 7:12am
Forum: E-Bike General Discussion
Topic: torque arms for using regen?
Replies: 24
Views: 709

Re: torque arms for using regen?

I meant if you have a thick steel dropout already, it just needs to fit perfect for it to be an effective torque arm. So you'd add metal to the inside of one leg of the dropout with a welder, then file down to fit the actual motor. For example, your your dropout is 10mm, but it may actually measure ...
by dogman dan
Nov 19 2020 7:03am
Forum: E-Bike General Discussion
Topic: Heavy fat ebike with hub motor, safe to do jumps?
Replies: 17
Views: 439

Re: Heavy fat ebike with hub motor, safe to do jumps?

You can go ahead and ride off curbs all you want, for sure, unless you have 6 loose spokes. The consensus seems to be in, don't do what you'd call a huck unless ready for some damage. Little pops should be fine provided you have no obvious weaknesses in the bike, loose spokes, poor torque arms, etc.
by dogman dan
Nov 18 2020 6:57am
Forum: E-Bike General Discussion
Topic: Heavy fat ebike with hub motor, safe to do jumps?
Replies: 17
Views: 439

Re: Heavy fat ebike with hub motor, safe to do jumps?

Well, the wheel build on a typical cheap DD motor is not that great, and no suspension to help soak up the jumps. You can damage the shit out of a cheap built wheel just by letting spokes get loose. But at least its not a geared motor. With geared motors there is some risk to the gears, or at least ...
by dogman dan
Nov 17 2020 7:52am
Forum: E-Bike General Discussion
Topic: Your thoughts on frames and riding positions?
Replies: 38
Views: 959

Re: Your thoughts on frames and riding positions?

We all have our individual physical limitations. Mine were not too overweight to stand the pedals all day, but too weak to pedal hard even 10 min. I just had no problems with unsaddling to stop. It gets much harder on a pedal forward, but with pedal forward you should be able to flat foot at least o...
by dogman dan
Nov 17 2020 7:42am
Forum: E-Bike General Discussion
Topic: torque arms for using regen?
Replies: 24
Views: 709

Re: torque arms for using regen?

Steel frame? If alloy, your design will still tend to crack the frame. A torque arm needs an arm. It needs the lever to connect to the frame at one of the stays. If steel, all it needs is a good tight fit with those meaty drops. weld along the inside, then grind to fit tight as hell. Steel will also...
by dogman dan
Nov 17 2020 7:33am
Forum: E-Bike General Discussion
Topic: Hill climbing commuter build
Replies: 23
Views: 753

Re: Hill climbing commuter build

Yeah, where I live we get in a normal year, 7 inches of rain. But that means as a commuter, you still ride in the rain at some point. Good fender on the front wheel will do the trick of course. But I found I rode through water a lot. With that little rain, puddles from sprinkler systems every mornin...
by dogman dan
Nov 16 2020 7:04am
Forum: E-Bike General Discussion
Topic: Vintage bike frame?
Replies: 1
Views: 151

Re: Vintage bike frame?

Sounds to me like its time to buy your welder. Then start playing with cruiser frames from the junk pile.
by dogman dan
Nov 16 2020 7:01am
Forum: E-Bike General Discussion
Topic: Hill climbing commuter build
Replies: 23
Views: 753

Re: Hill climbing commuter build

One way to get clearance for the battery mounted in the worst possible place. At least in the rain anyway.

Bet it does climb like a goat with that 20" wheel though!! And it works for you. Creativity always gets a thumbs up here.
by dogman dan
Nov 16 2020 6:56am
Forum: E-Bike General Discussion
Topic: Your thoughts on frames and riding positions?
Replies: 38
Views: 959

Re: Your thoughts on frames and riding positions?

Re reading your first post, it does sound like your biggest problem is moving your favorite , but sucking, seat from bike to bike. Its too fat for a really long ride. When I was doing long rides a lot, I searched hard for an ideal seat. It had to be a bit fatter and cushier than a road bike or MTB s...
by dogman dan
Nov 16 2020 6:41am
Forum: E-Bike General Discussion
Topic: torque arms for using regen?
Replies: 24
Views: 709

Re: torque arms for using regen?

Pinch it for the best possible torque arm. Lots of designs. Here is mine. In this case, the steel bike allowed me to weld one of the angle irons to the bike.
Pinch dropout, on Race bike..jpg
Pinch dropout, on Race bike..jpg (90.59 KiB) Viewed 459 times
by dogman dan
Nov 14 2020 6:51am
Forum: E-Bike General Discussion
Topic: Your thoughts on frames and riding positions?
Replies: 38
Views: 959

Re: Your thoughts on frames and riding positions?

You just explained why I got a welder and started experimenting. I never got around to one of the projects I had in mind, making this one into a longer tail, or at least putting a cheap steel rear pivot shock from an old mtb on it. 6-1-2015 Re bike with dd hub..JPG I liked riding this bike a lot, bu...
by dogman dan
Nov 13 2020 6:07am
Forum: E-Bike General Discussion
Topic: What is the point of a 3T, 4T, 5T winding if torque per amp is the same?
Replies: 16
Views: 444

Re: What is the point of a 3T, 4T, 5T winding if torque per amp is the same?

The real reason to pick a slower wind motor, is not efficiency per se. Its to go slow. Two examples, Delta trikes (adult trikes) need to stay below 15 mph in general, because steering them gets tricky when ridden faster, and the rider may be 80. Pick a slow motor, so that at 36v the trike is truly s...
by dogman dan
Nov 05 2020 3:20pm
Forum: E-Bike General Discussion
Topic: Geared Hub Motor Quality
Replies: 51
Views: 1509

Re: Geared Hub Motor Quality

He won't even say what its for.
by dogman dan
Nov 01 2020 5:19am
Forum: E-Bike General Discussion
Topic: Geared Hub Motor Quality
Replies: 51
Views: 1509

Re: Geared Hub Motor Quality

None of the above will be particularly crap quality. The days of geared motors breaking or melting the gears are long gone. Possibly the best out there is the Ezee. Grin Technology in Vancouver is the vendor for it. What is the best choice for you depends on a lot of other factors, particularly the ...