Search found 6937 matches

by Drunkskunk
Mar 09, 2018 10:40 pm
Forum: E-Bike General Discussion
Topic: Lacing Moto Rim to Hub Motor
Replies: 5
Views: 261

Re: Lacing Moto Rim to Hub Motor

what kind of angle are the spoke holes drilled at on the rim. do they have angled seats matched anywhere close to your 49'?

If so, this is a good wheel to consider using 11g or 12g spokes on.
by Drunkskunk
Mar 06, 2018 6:06 pm
Forum: General Discussion
Topic: Battery Efficiency Question 56v vs 32v
Replies: 12
Views: 381

Re: Battery Efficiency Question 56v vs 32v

Sounds like the Polaris has a problem. 15wh/m to 20wh/m is a normal range for most ebikes at 20mph average. Anything higher than 20, and you probably have an issue. try this simulator. Use thee throttle slider to set the speed, and you can see the constant wh/m used at speed on the right, labled as ...
by Drunkskunk
Mar 06, 2018 12:56 pm
Forum: E-Scooter and Motorcycle General Discussion
Topic: Best electric scooter in the world?
Replies: 17
Views: 937

Re: Best electric scooter in the world?

That is pretty awesome. I really like that you're building this as electric only.
by Drunkskunk
Mar 05, 2018 5:00 pm
Forum: E-Bike General Discussion
Topic: Stongest tandem ebike wheel build help
Replies: 55
Views: 1125

Re: Stongest tandem ebike wheel build help

11gauge is too thick for any bicycle rim made. You won't be able to get them tight enough, and that causes them to fatigue and break. If you have any rim damage that isn't related to breaking spokes, then the problem isn't the rim, but the tire. A proper sized and inflated tire won't let the rim com...
by Drunkskunk
Mar 05, 2018 4:33 pm
Forum: E-Bike General Discussion
Topic: where can I get more hub motor axle caps?
Replies: 4
Views: 286

Re: where can I get more hub motor axle caps?

yeah, those caps are for shipping. it keeps the axle from pocking through the box. They aren't designed stay on or last. If you want something that will, cut a piece of rubber hose and slip that over the threads. Or swap the standard nut out for a deep well, capped nut. I've used lugnuts before. The...
by Drunkskunk
Mar 04, 2018 10:33 pm
Forum: E-Bike General Discussion
Topic: Columbia 1937 1500w, part selection help
Replies: 21
Views: 584

Re: Columbia 1937 1500w, part selection help

That's better, It would work. It at least has brakes. It's Still a BSO ( Bike Shaped Object), and you would be better with a real Bike, like the base entry level Gravity Bullseye Monster, sold through several places, cheapest on Bikesdirect.com Fat bikes are fun, but you're going to have some proble...
by Drunkskunk
Mar 04, 2018 10:12 pm
Forum: E-Bike General Discussion
Topic: Are 3.7 8ah LiPo batteries 25c 200A super cells good for ebike
Replies: 3
Views: 304

Re: Are 3.7 8ah LiPo batteries 25c 200A super cells good for ebike

I have little trust in generic discount Lipo cells. They are dangerous enough when sourced from a known brand. In my head, I associate the term " Discount Lipo " with terms like " Discount Condoms ", or " Discount Parachute ." It just doesn't seem like a good idea. Charging lipo should be done one o...
by Drunkskunk
Mar 03, 2018 10:12 pm
Forum: E-Bike General Discussion
Topic: Columbia 1937 1500w, part selection help
Replies: 21
Views: 584

Re: Columbia 1937 1500w, part selection help

Regen braking isn't a substitute for brakes. It can't completely stop a bike. It isn't as powerful as a normal brake. It's nearly ineffective at low speeds. It can't be used to hold a bike still at a stop, like when waiting for a light while on a hill. It won't work if the battery is full or if ther...
by Drunkskunk
Mar 03, 2018 8:50 pm
Forum: E-Bike General Discussion
Topic: Columbia 1937 1500w, part selection help
Replies: 21
Views: 584

Re: Columbia 1937 1500w, part selection help

Welcome to the forum. I like the bike, as I have a '30s era Columbia Ebike my self, and those reproduction bikes look nice. That said, the bike will be a problem. It's a hard tail with a coaster brake and no front brake at all. The motor you picked would eliminate the rear brake, and in general, be ...
by Drunkskunk
Mar 02, 2018 2:12 pm
Forum: E-Bike General Discussion
Topic: The end of BionX?
Replies: 112
Views: 8190

Re: The end of BionX?

I've always admired the Bionx products. Early on, they had a form of torque sensing that could not be beat, and had come up with some really innovative products over the years. Their packaging was clean, neat, and integrated unobtrusively into most bikes. Unfortunately, they kept a closed system and...
by Drunkskunk
Mar 01, 2018 7:13 pm
Forum: E-Scooter and Motorcycle General Discussion
Topic: Interesting e-scooter or not? (wangye e-romantic)
Replies: 10
Views: 386

Re: Interesting e-scooter or not? (wangye e-romantic)

I know we're an Electric vehicle site, But the best scooter for your needs is going to be a gas scooter. That electric scooter might be the most reliable scooter ever, but it also might not. Batteries don't last for ever, and I would consider a 4 year old battery worthless, as it can't be counted on...
by Drunkskunk
Mar 01, 2018 2:39 pm
Forum: E-Bike General Discussion
Topic: Newton-meter confusion.
Replies: 3
Views: 319

Re: Newton-meter confusion.

8.18 newtons at 1000 RPM is 68n at the 120rpm you plan to gear it down to. So that's 50 foot-pounds of torque. 50 foot-pounds of torque at the crank is the same force as a 100 pound girl standing on a pedal (175mm crank arm = 6 inches) So that motor would peak out with all the power of an angry pint...
by Drunkskunk
Mar 01, 2018 1:36 pm
Forum: E-Bike General Discussion
Topic: Improvised e-bike?
Replies: 5
Views: 335

Re: Improvised e-bike?

I think your idea would work, just not for very long. 2 main problems: First, A drill isn't rated for continuous duty. it can't run very long under load without overheating. it will work for a while, but you'll eventually fry the motor. Second, the gears aren't built for that kind of continuous torq...
by Drunkskunk
Feb 28, 2018 1:37 pm
Forum: E-Bike General Discussion
Topic: Heavy cargo and steep hills: Will my plan result in injury and carnage?
Replies: 20
Views: 586

Re: Heavy cargo and steep hills: Will my plan result in injury and carnage?

I think you could make that LGP technically functional, if you throw enough time and money at it. I don't think it's worth your effort. the high center of gravity over the front wheel, massive weight, and trying to drive off the back wheel would be a handling nightmare. the IGH wouldn't hold up, so ...
by Drunkskunk
Feb 24, 2018 4:44 pm
Forum: General Discussion
Topic: Small Solar Proposal
Replies: 60
Views: 1393

Re: Small Solar Proposal

Okay, thanks DS. Even at twice the cost? If I had to rely on them, then Yes. For puttering around in an RC vehicle, the Turnegy are fine. If my safety was on the line, or if I had invested a lot of money in something like a race boat and planned on winning, and wanted reliable safe equipment, then ...
by Drunkskunk
Feb 23, 2018 5:10 pm
Forum: General Discussion
Topic: Small Solar Proposal
Replies: 60
Views: 1393

Re: Small Solar Proposal

Sounds like an awesome project, I'd love to see the progress as you get this built.

If it was me, I'd pick Sanyo or Panasonic cells over Turnagy. More power density meaning fewer cells and lower weight. Also probably higher quality.
by Drunkskunk
Feb 23, 2018 4:45 pm
Forum: E-Bike General Discussion
Topic: Cheap suspension fork 1-1/8 threaded
Replies: 24
Views: 709

Re: Cheap suspension fork 1-1/8 threaded

... So running a lower PSI front tire might be better than a cheap suspension fork is what you're telling me? Yes, but No. They won't replace a suspension for taking the jolt out of hitting potholes. you'll feel them more than you would with a crap-tastic pogo stick suspension. However, you won't h...
by Drunkskunk
Feb 23, 2018 4:27 pm
Forum: E-Bike General Discussion
Topic: Zip Tie Failure
Replies: 22
Views: 855

Re: Zip Tie Failure

Velcro works, but can be an issue in the wet and the mud. For something like this, I would use 1" webbing strap but a n adjustable strap buckle. Like a backpack or tool bag strap. Something like this: Image
by Drunkskunk
Feb 23, 2018 4:02 pm
Forum: E-Bike General Discussion
Topic: eBike Drag Racing Timing?
Replies: 9
Views: 431

Re: eBike Drag Racing Timing?

Real portable timing lights are about $5000.
But they make them for RC cars, that can go wireless for about a football field in length, and run in the $200 range.

Here's one: https://traxxas.com/products/parts/acce ... mingsystem
by Drunkskunk
Feb 23, 2018 3:00 pm
Forum: General Discussion
Topic: Heavy duty wheels for 26" MTB with BBSHD
Replies: 4
Views: 285

Re: Heavy duty wheels for 26" MTB with BBSHD

Pics would help. If the only damage to your wheel was a flat spot, then your rim was beyond heavy duty enough for the tire you were running. The failure point was the tire. Flat spots happen when when the tire fails to hold up under impact. This happens when the tire is too small, under inflated, or...
by Drunkskunk
Feb 23, 2018 1:48 pm
Forum: E-Bike General Discussion
Topic: Cheap suspension fork 1-1/8 threaded
Replies: 24
Views: 709

Re: Cheap suspension fork 1-1/8 threaded

Suntour forks are often worse than nothing. My last Suntour was flexible enough that you could see the fork bend back under normal braking. While it took the jolt out of a few bumps, it made the bike handle like a rattly, clunky, wet noodle. it wasn't pleasant to ride, and never felt safe. Trek 800 ...
by Drunkskunk
Feb 22, 2018 4:47 pm
Forum: General Discussion
Topic: Aquatune - Convert Water to Hydrogen for $600 + $400 labor
Replies: 7
Views: 335

Re: Aquatune - Convert Water to Hydrogen for $600 + $400 labor

ok. first problem, the energy needed to break the bonds between hydrogen and oxygen is exactly thew same as the energy produced when they recombine. So if every step in the system was 100.0% efficient, the amount of power needed to break the water into gas would be exactly the same as the output pow...
by Drunkskunk
Jan 23, 2018 7:27 pm
Forum: E-Bike General Discussion
Topic: Feedback on plan for first e-bike - Giant Roam with BBS__?
Replies: 28
Views: 893

Re: Feedback on plan for first e-bike - Giant Roam with BBS__?

If the BBSHD is in your budget, it would be a great option. Sure, putting more torque on your chain and gears will wear it out faster, but those are parts that wear out eventually anyway. "faster" might be mean they are toast by summer, or toast in 20 years. sooner than normal, but sooner might stil...
by Drunkskunk
Jan 22, 2018 8:02 pm
Forum: E-Bike General Discussion
Topic: Challenge with brakes
Replies: 20
Views: 671

Re: Challenge with brakes

I'll never be a fan of roller brakes, but it would work well and be relatively easy to put on that bike with a hub change. Adding the rim brakes could work, but the rim would need to be suitable for rim brakes. if it isn't, the brakes would crush or crack the rim. A harder but better alternative mig...
by Drunkskunk
Jan 22, 2018 5:56 pm
Forum: E-Bike General Discussion
Topic: Tandem Duel Electric Wheels
Replies: 13
Views: 504

Re: Tandem Duel Electric Wheels

Really nice bike. 250w isn't going to be enough to help move 2 people very well. for one person, it would still be fairly under powered but usable. With 2 motors, it should work, but 2 people and just one 250w motor may over stress the motor and damage the gears. You may want to avoid standing start...