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by dogman dan
Dec 17 2018 7:22am
Forum: E-Bike General Discussion
Topic: Adding Torque
Replies: 10
Views: 189

Re: Adding Torque

Re the motor limitations. What you bought is a generic motor, often referred to as 9 continent type. Its not a 1500w motor, its a 500w motor. The good news is that motor easily handles 2000w for a moderate time, and up to 3000w for a relatively short time. ( 15-20 min, or about 8 miles at 35-40 mph....
by dogman dan
Dec 14 2018 7:45am
Forum: Battery Technology
Topic: batteries not the problem
Replies: 6
Views: 203

Re: batteries not the problem

If you bought new lead batteries, what type did you get? Wrong type lead new will be worse under load than what it came with.
by dogman dan
Nov 28 2018 8:31am
Forum: Battery Technology
Topic: Solar panel direct charging
Replies: 3
Views: 287

Re: Solar panel direct charging

How many watts is your panel? It won't be much use unless its about 100w or more. Yes, a smaller 30w panel still adds some power, but you can pedal up 75w of power with only moderate effort. Not saying don't do it, just get a buck converter/ voltage converter that will boost it up to a voltage above...
by dogman dan
Nov 25 2018 7:47am
Forum: E-Bike General Discussion
Topic: Battery Fire.
Replies: 39
Views: 1417

Re: Battery Fire.

I'm proof of that. A "safe" bms protected 18650 pack charging in my garage did this to my house.

I was an idiot to trust that thing in my garage. As we were getting the dogs out of the burning house, it sounded just like gunfire in the garage, as about 300 18650 cells popped off.
P2110075.JPG
by dogman dan
Nov 25 2018 7:43am
Forum: E-Bike General Discussion
Topic: Full suspension semi recumbent for long range
Replies: 28
Views: 908

Re: Full suspension semi recumbent for long range

Yeah, AW, if you live in the sand like we do, you do have to pour motor oil through that freewheel pretty often to flush out the sand. It might be just oiling them at all that makes the old crusty one so much quieter. At the flea yesterday, I saw a 20" mtb with a rear shock. I thought hmm, just what...
by dogman dan
Nov 25 2018 7:26am
Forum: General Discussion
Topic: List of small hatchback cars
Replies: 103
Views: 3312

Re: List of small hatchback cars

Being better aero, cars from the last 10 years have pretty much fixed wind noise. But both focuses we had, you could really hear the tires. Worse of course, on any older, or new chip seal road. Just poor sound insulation around the wheel wells I think, combined with the closer position of the tire o...
by dogman dan
Nov 24 2018 7:44am
Forum: E-Bike General Discussion
Topic: Groundbreaking Innovation On The E-bike!!
Replies: 16
Views: 799

Re: Groundbreaking Innovation On The E-bike!!

The best way to ride e bikes is with a throttle. Only your brain can vary the assist that quickly and consistently. But people take years, or even never learn to properly use their throttle. So easy to let assist creep up. Hand fatigue just means you don't grip the bars correctly. 1 select a speed y...
by dogman dan
Nov 24 2018 7:33am
Forum: E-Bike General Discussion
Topic: Full suspension semi recumbent for long range
Replies: 28
Views: 908

Re: Full suspension semi recumbent for long range

RE the twitchy ride, my RE Bike semi recumbent is similar. You just get used to it, mostly its bad at really slow speeds like under 5 mph. Re the freewheel noise, pedaling makes that quiet. For longest range you would want slower travel anyway, like 15 mph in the highest gear the thing can pedal in....
by dogman dan
Nov 24 2018 7:24am
Forum: General Discussion
Topic: List of small hatchback cars
Replies: 103
Views: 3312

Re: List of small hatchback cars

I thought that might be the case with the fit. At least a bit noisy to drive freeway speed. ( out here, that's 85 mph btw, 75 speed limit) Not a problem if its a drive half an hour to work car, but on a 700 mile drive, quieter gets nice. With the focus vs the subaru, it was noise coming from the fro...
by dogman dan
Nov 22 2018 8:00am
Forum: E-Bike General Discussion
Topic: Where to buy geared rear hub motor kit?
Replies: 19
Views: 1448

Re: Where to buy geared rear hub motor kit?

They should have a plug for an external speedo input on those controllers IMO. Re the 500w ebikeling kit, Yes, 700 or so max watts with that kit on 36v, which is plenty to get up even very steep hills. But if the hill is long, and the ass is big, then there IS a risk of melting down those smaller mo...
by dogman dan
Nov 22 2018 7:57am
Forum: E-Bike General Discussion
Topic: First build project review
Replies: 4
Views: 216

Re: First build project review

Battery will be big enough, but it would most likely last longer if you made it 6p, because the discharge rate per cell will be lower. And have less sag, which is nice for the rider. As for the kit, plenty of power and speed for fat tire bikes. More would not be ideal, since fat bikes are not meant ...
by dogman dan
Nov 22 2018 7:53am
Forum: Battery Technology
Topic: What Are The Pros & Cons Of These 2 Battery Systems?
Replies: 6
Views: 243

Re: What Are The Pros & Cons Of These 2 Battery Systems?

FWIW, paralleling two small batteries is easy, and give you the same result as one big one. Lower sag, longer range, less stress on each cell.

The only hassle is unplugging to charge them separate, which aint much hassle, and being sure both are actually charged full before reconnecting to ride.
by dogman dan
Nov 22 2018 7:47am
Forum: General Discussion
Topic: List of small hatchback cars
Replies: 103
Views: 3312

Re: List of small hatchback cars

How is the noise level of the fit? That was the other turn off for me, on the focus. The ford focus was not bad noisy, like our tiny ford festiva was. But after I drove the Subaru a lot I got used to pretty darn quiet ride. Then we'd sometimes take a longer trip in the focus just for the better mile...
by dogman dan
Nov 21 2018 9:58am
Forum: E-Bike General Discussion
Topic: Where to buy geared rear hub motor kit?
Replies: 19
Views: 1448

Re: Where to buy geared rear hub motor kit?

Again, fine to run the ebikeling 350w rated motor on 1000w, but not up big ass hills if your ass is big. Cool they show in stock. Cooler if they are. ( good enough if they are just in US customs at the moment) Those smaller geared motors are great, do fine for most people. Just not the big guy towin...
by dogman dan
Nov 21 2018 9:56am
Forum: E-Bike General Discussion
Topic: Battery protection in the cold
Replies: 5
Views: 278

Re: Battery protection in the cold

Just leaving a warm garage will often do the trick, the with enough discharge rate, the battery will make heat. Just depends on how good a heat sink your battery box is. I was having trouble because I built my box for summer, making it a nice aluminum plate heat sink for the lipos. Not so great in w...
by dogman dan
Nov 20 2018 8:02am
Forum: E-Bike Technical
Topic: A portable gasoline generator for long range
Replies: 28
Views: 734

Re: A portable gasoline generator for long range

Got to agree with the get a motorcycle idea. I gave up the idea of really long range e biking, and got a 400cc scooter. FWIW, because I'm a safe bet for insurance, (old fart) including insurance its only costing me about 15 cents a mile. That's just about half the cost per mile of my 80 mile range e...
by dogman dan
Nov 20 2018 7:48am
Forum: E-Bike General Discussion
Topic: Rayvolt Cruzer upgrades help
Replies: 2
Views: 125

Re: Rayvolt Cruzer upgrades help

Screw PAS with that bike. Just learn to use the throttle right. Pick a gear, pedal in that gear, bring up throttle to make that pedaling easy. PAS can't react as fast as your brain and hand can, to keep the effort level. Just don't death grip the throttle, preferably a half twist, and you can ride a...
by dogman dan
Nov 20 2018 7:34am
Forum: E-Bike General Discussion
Topic: Where to buy geared rear hub motor kit?
Replies: 19
Views: 1448

Re: Where to buy geared rear hub motor kit?

Typically harder to find a real cheap deal on the 500w rated geared motor kits. These are the ones able to handle up to 1500w if you push them. The 350w kit can be found cheap, but often only in front hub for that cheap. Those are a bit weak if you are heavy, or worse, heavy and have a steep hill. T...
by dogman dan
Nov 20 2018 7:22am
Forum: E-Bike General Discussion
Topic: Battery protection in the cold
Replies: 5
Views: 278

Re: Battery protection in the cold

The battery will often heat itself in the cold, so insulation is the main thing. My worst cold performance was when using a tight metal box to hold not so great lipos. So they would start out from the home ok, then sag like hell after a short ride in the snow chilled them enough. Another time I had ...
by dogman dan
Nov 16 2018 6:26pm
Forum: General Discussion
Topic: List of small hatchback cars
Replies: 103
Views: 3312

Re: List of small hatchback cars

how a car fits IS important. the wifes focus cars always made my back hurt, both of em. I'm taller, so I saw out of them fine. But the foresters have been the car that fits me best. No back hurts with those seats. Van has the best seats though, long as gas stays below three bucks its now the choice ...
by dogman dan
Nov 16 2018 10:02am
Forum: E-Bike Technical
Topic: Top speed limited or torque-speed trade off?
Replies: 14
Views: 571

Re: Top speed limited or torque-speed trade off?

Your no load speed tells me you most likely have a slower wound motor. 350 at 48v is not killer slow, but its not the fast motor for sure. Sounds to me like a 7 turn, vs the 30 mph 6 turn. Maybe even an 8 turn, though they are rare. More speed at 48v is unlikely IMO. But the good news is it will mak...
by dogman dan
Nov 16 2018 9:55am
Forum: E-Bike Technical
Topic: mid drive+geared hub motor - same battery?
Replies: 2
Views: 111

Re: mid drive+geared hub motor - same battery?

the battery would have to be very powerful, to handle the amps of two motors. Also, the torque of the mid drive could shear the cover off the rear motor, at the gears.

But the answer is yes, with some caveats.


If you want a motorcycle, buy a strong battery, and a big ass rear direct drive motor.
by dogman dan
Nov 16 2018 9:51am
Forum: E-Bike Technical
Topic: A portable gasoline generator for long range
Replies: 28
Views: 734

Re: A portable gasoline generator for long range

Pretty much limited to the 2 stroke 800w generators like harbor freights tailgator. Loud, stinky, and still fairly heavy, about 30 pounds. 30 pounds of battery will take you a LONG way, but it is small enough to drag along in a trailer if you are going where there are no plugs at all. Good little ge...
by dogman dan
Nov 16 2018 9:35am
Forum: E-Bike General Discussion
Topic: Black Friday 2018 Sales ?
Replies: 13
Views: 936

Re: Black Friday Sales ?

Just missed a 25% off sale at EBK. Likely that offer was just for those on their e mail list. There may be more sales, till he's sold out enough stock to close out the year. But certain things may go out of stock, particularly certain sizes of battery, soon. That's been the typical pattern. I don't ...
by dogman dan
Nov 16 2018 9:29am
Forum: E-Bike General Discussion
Topic: Carbon frame road bike - help required with 250W motor selection.
Replies: 5
Views: 221

Re: Carbon frame road bike - help required with 250W motor selection.

Bullet proof way to not fry a 250w hub motor up a killer hill is not do it. Otherwise, you could do a temp overheat switch like the Heinsmanns had. Overheating inside the motor opens the switch would turn off the throttle. Saves your motor, leaving you pedaling up the hill, since you chose too weak ...