Search found 3100 matches

by Kepler
Dec 12 2018 11:36pm
Forum: E-Bike Non-hub Motor Drives
Topic: Full suspension mountain bike Friction Drive
Replies: 103
Views: 4178

Re: Full suspension mountain bike Friction Drive

Thanks, Most people have no idea the bike is assisted. Noise level is low also so that doesn't give anything away. With regards the grip material, sound brutal on the tire but with the low power levels I use (up to 300W) the wear is minimal. Trick is to make sure the motor is hard enough on the tire...
by Kepler
Nov 30 2018 9:27pm
Forum: E-Bike Non-hub Motor Drives
Topic: Full suspension mountain bike Friction Drive
Replies: 103
Views: 4178

Re: Full suspension mountain bike Friction Drive

With regards to ratios, you mentioned 11:1 with a friction drive which sounds logical. However reduction ratios have no bearing on friction drives. A bike with a 20" wheel will go at the same speed for a given motor rpm and as bike with 700c wheel. And would go at the same speed for a given RPM if ...
by Kepler
Nov 30 2018 9:19pm
Forum: E-Bike Non-hub Motor Drives
Topic: Full suspension mountain bike Friction Drive
Replies: 103
Views: 4178

Re: Full suspension mountain bike Friction Drive

Your work is wonderful! Excuse me for the questions, but I'm totally inexperienced in the field of RC engines. Instead I have enough experience (mechanics and a bit of electronics) in the hub engines and in the central engines. Is this system for light cyclists? unfortunately weight 105 kg :-( I li...
by Kepler
Nov 30 2018 9:00pm
Forum: E-Bike Non-hub Motor Drives
Topic: Full suspension mountain bike Friction Drive
Replies: 103
Views: 4178

Re: Full suspension mountain bike Friction Drive

Go up a few posts for further info on grip tape https://www.endless-sphere.com/forums/viewtopic.php?f=28&t=96581&start=75#p1420150 I have had the grip tape fail in wet weather due to saturation but I think it more that the Uglu double side tape failed. I have now attached it with good old 30 minute ...
by Kepler
Nov 19 2018 6:27pm
Forum: E-Bike Non-hub Motor Drives
Topic: Full suspension mountain bike Friction Drive
Replies: 103
Views: 4178

Re: Full suspension mountain bike Friction Drive

I have replaced it once within the life of this tire and that was just recently. The friction material lasts fine however I did quite a bit of wet weather operation over the past few weeks. The constant saturation will shorten the life of the friction material. Predominantly dry weather operation I ...
by Kepler
Nov 18 2018 7:47pm
Forum: E-Bike Non-hub Motor Drives
Topic: Kepler Friction drive comes of age.
Replies: 371
Views: 47729

Re: Kepler Friction drive comes of age.

Road testing of the Arduino based PAS control is now complete. Settings that I came up with on the bench translated well to the road with the assist starting in a very predictable manor. Although theoretically two turns of the crank should start the drive, in real life it takes three or four turns t...
by Kepler
Nov 18 2018 7:17pm
Forum: E-Bike Non-hub Motor Drives
Topic: Full suspension mountain bike Friction Drive
Replies: 103
Views: 4178

Re: Full suspension mountain bike Friction Drive

I have been using this bike for both off road and commuting duties of late and as such have been racking up some distance. I am finding that this bike is only marginally slower over the commute compared to my assisted road bike but far more comfortable and the bike can be used in all weather. Tire w...
by Kepler
Nov 17 2018 2:07am
Forum: E-Bike Non-hub Motor Drives
Topic: My RC Mid Drive with Single Stage Reduction
Replies: 101
Views: 4841

Re: My RC Mid Drive with Single Stage Reduction

FZBob, I think you are coming to the same conclusions I came to a couple of years ago. Bottom line there is no substitute for lots of copper. I have cupboard full of motors I have tested over the years. Conclusion was that if you want those Watts to translate to the ground, bigger was always better....
by Kepler
Nov 15 2018 7:08pm
Forum: E-Bike Non-hub Motor Drives
Topic: Full suspension mountain bike Friction Drive
Replies: 103
Views: 4178

Re: Full suspension mountain bike Friction Drive

Very good. The programming side becomes a hobby within a hobby. I would go with with a Nano. Nice and compact and has a built in TTL so direct USB connection. You don't have to worry about 3.3V or 5V if you are using a Nano. They handle 5V regulated which is what the Vesc supplies. IO count is basic...
by Kepler
Nov 14 2018 10:09pm
Forum: E-Bike Non-hub Motor Drives
Topic: My RC Mid Drive with Single Stage Reduction
Replies: 101
Views: 4841

Re: My RC Mid Drive with Single Stage Reduction

This motor looks like it could fit the bill.

http://epowerhobby.com/product/e-power- ... 0kv-2450w/

I like that they offer a sensorless version. Perfect for your application. And they are in stock at the moment.
by Kepler
Nov 14 2018 7:53pm
Forum: E-Bike Non-hub Motor Drives
Topic: Full suspension mountain bike Friction Drive
Replies: 103
Views: 4178

Re: Full suspension mountain bike Friction Drive

That is a really neat implementation. Nicely done. I think the whine you are talking about is coming from the tread on that tire. If you have a tire with a slick center, it would be worth trying that and see how that goes. The other thing is that I have found variations in the noise that the Flipsky...
by Kepler
Nov 13 2018 8:01pm
Forum: E-Bike Non-hub Motor Drives
Topic: Full suspension mountain bike Friction Drive
Replies: 103
Views: 4178

Re: Full suspension mountain bike Friction Drive

Hi Steph. Welcome to the conversation. This type of setup sound perfect for your commute especially considering your decent is at the end of your commute heading there and at the start going back. - instead of rubbing against the outside of the wheel, what about fixing a teeth pattern on a side of t...
by Kepler
Nov 10 2018 11:16pm
Forum: E-Bike Non-hub Motor Drives
Topic: Kepler Friction drive comes of age.
Replies: 371
Views: 47729

Re: Kepler Friction drive comes of age.

Lots of requests for pedal assist. I can see merit in using pedal assist but I like the idea of still using the single button for 2 speeds and kill but only operational if pedaling. Anyway working on the code at the moment. thought it would be piece of cake lol. Wrong!!! Anyway, got my litte test j...
by Kepler
Oct 28 2018 4:14am
Forum: Items for Sale - New
Topic: Kepler Bottom Bracket Friction Drive For Sale (Finally)
Replies: 298
Views: 30977

Re: Kepler Bottom Bracket Friction Drive For Sale (Finally)

Yes, 100% regen when both brakes are applied. I used Hall sensors as I wanted it to be completely water proof. I quickly discovered micro switches dont belong on a mountain bike and quickly fail under muddy and rough conditions. The button throttle and brake sensors are connected to a custom program...
by Kepler
Oct 26 2018 9:55pm
Forum: Items for Sale - New
Topic: Kepler Bottom Bracket Friction Drive For Sale (Finally)
Replies: 298
Views: 30977

Re: Kepler Bottom Bracket Friction Drive For Sale (Finally)

Interesting idea. if you only needed a boost to low speed, you could us a low kv motor, so 60 kv and say a high C rated 4S Lipo battery. The motor would climb the tire under load, then drop off the tire once it reach full speed which would be quite low. The motor could easily be pulled on to the tir...
by Kepler
Oct 21 2018 2:30am
Forum: E-Bike Non-hub Motor Drives
Topic: My RC Mid Drive with Single Stage Reduction
Replies: 101
Views: 4841

Re: My RC Mid Drive with Single Stage Reduction

If you were starting from scratch would you choose a lower kV motor if you had access to them? Thanks! If I was starting from scratch, and there was a good selection of 60 KV motors, I might go 8S. Same for 80KV and 6S. Just size the battery pack for the same number of Watt Hours. Got to ask, why 8...
by Kepler
Oct 21 2018 2:11am
Forum: E-Bike Non-hub Motor Drives
Topic: Full suspension mountain bike Friction Drive
Replies: 103
Views: 4178

Re: Full suspension mountain bike Friction Drive

Running out of things I can do on this bike now :)



20181020_170031.jpg


20181020_170019.jpg
by Kepler
Oct 21 2018 2:05am
Forum: E-Bike Non-hub Motor Drives
Topic: Full suspension mountain bike Friction Drive
Replies: 103
Views: 4178

Re: Full suspension mountain bike Friction Drive

Here is the bracket with the motor attached. (no snickers about the shape thanks :oops: ) All jokes asided, this bracket is about Mk5 and is refined to point that it can be removed from the bike by removing one 8mm nut and in about 10 seconds. Attachment takes a little longer, maybe 30 seconds. Note...
by Kepler
Oct 21 2018 1:37am
Forum: E-Bike Non-hub Motor Drives
Topic: Full suspension mountain bike Friction Drive
Replies: 103
Views: 4178

Re: Full suspension mountain bike Friction Drive

I think that 3M tape would work but I have never tried it. I have tried lots of different methods of attaching the grip tape and nothing works better then Uglu. In regards to belt sander material, Norton Metalite 120 grit works a treat. When you cut the grip tape tape to length, make it 2mm longer t...
by Kepler
Oct 20 2018 2:25am
Forum: E-Bike Build Threads / Photos & Video
Topic: Stealth FUTR owners builds and pics
Replies: 2154
Views: 124017

Re: Stealth FUTR owners builds and pics

Rix wrote:
Oct 19 2018 9:43am
mark 324 wrote:
Oct 19 2018 8:59am
Where is Jay at? Send pms, need order a 1 frame?
Hit him up on FB. He's in the process of building up a bigwheel 85 KTM with a potential peak power of 30KW.
Good to hear Rix. Hadn't seen any activity from him for a while and it was really starting to worrying me.
by Kepler
Oct 20 2018 2:11am
Forum: E-Bike Non-hub Motor Drives
Topic: My RC Mid Drive with Single Stage Reduction
Replies: 101
Views: 4841

Re: My RC Mid Drive with Single Stage Reduction

Thread has gained some well deserved traction. Low power lightweight builds are sadly lacking on this forum and I think this build has been a nice change of direction. I total disagree that RC motors are not suited to ebikes. coupled with a Vesc controller (or similar), I think they are the perfect ...
by Kepler
Oct 18 2018 7:41pm
Forum: E-Bike Non-hub Motor Drives
Topic: Full suspension mountain bike Friction Drive
Replies: 103
Views: 4178

Re: Full suspension mountain bike Friction Drive

27 km commute this morning using regen braking during the ride. For a fairly flat ride, managed close to 20% regen. Also I don't think my brake pads made contact with discs once. Bonus :) Much more natural to activate the regen via the brake levers. The link below is to the mornings ride via Relive....
by Kepler
Oct 18 2018 7:26pm
Forum: E-Bike Non-hub Motor Drives
Topic: Full suspension mountain bike Friction Drive
Replies: 103
Views: 4178

Re: Full suspension mountain bike Friction Drive

Tested all sorts of grip material. Conclusion is that it needs to be some sort of abrasive to guarantee traction in all conditions. Sleaves also increase the diameter of motor which could be problematic. If you want a 700W to 1000W continuous motor option, use a 6374 https://flipsky.net/collections/...
by Kepler
Oct 17 2018 6:28pm
Forum: E-Bike Non-hub Motor Drives
Topic: Full suspension mountain bike Friction Drive
Replies: 103
Views: 4178

Re: Full suspension mountain bike Friction Drive

Hall sensors have been fitted to both front and rear brakes. The regen activates just before the brake pads come in contact with the discs and each brake lever provides 50% of the available regen. I have programmed a one second ramp to the regen so it activates nice and smoothly. Regen amps have bee...
by Kepler
Oct 14 2018 11:06pm
Forum: E-Bike Non-hub Motor Drives
Topic: Full suspension mountain bike Friction Drive
Replies: 103
Views: 4178

Re: Full suspension mountain bike Friction Drive

' if I regened every time I touched the brakes,' Seems logical,but what if freewheeling on a long descent ? Would you have to feather the brakes to activate it? Not ideal as you are wasting speed,pads and regen energy by applying the brakes,even lightly. Or are you planning on having the sensor act...