Search found 30 matches

by urga
Nov 15 2018 2:54pm
Forum: E-Bike Non-hub Motor Drives
Topic: Full suspension mountain bike Friction Drive
Replies: 103
Views: 4264

Re: Full suspension mountain bike Friction Drive

Oh Dear,I do believe I'm going to give it a go!. I fear I'll soon be making more of a whine than the Flipsky motor. I had a look at the micro(because of the usb)rather than the mini. Any drawbacks to this(apart from a i/o deficiency)? Was it the 3.3v version? Last time I programmed it was in the 80'...
by urga
Nov 14 2018 11:20am
Forum: E-Bike Non-hub Motor Drives
Topic: Full suspension mountain bike Friction Drive
Replies: 103
Views: 4264

Re: Full suspension mountain bike Friction Drive

Here's my attempt at a permanent friction drive 20181114_141709.jpg 20181114_150424.jpg 20181114_141724.jpg :roll: I've designed it so I can disengage the motor with allen key should I run the battery flat(yet to do that,but it will surely happen). The main advantage I've found is it is mechanically...
by urga
Oct 27 2018 3:17pm
Forum: E-Bike Non-hub Motor Drives
Topic: Outrunner motor advice
Replies: 0
Views: 246

Outrunner motor advice

I have both a Turnigy and Flipsky 6354 motors. The Turnigy is both smaller and very quiet in FOC mode. The Flipsky is much larger and very loud in FOC mode. It emits a high pitched whine when running. Has anyone got any experience with these motors ? The Turnigy is rated at 260Kv and the Flipsky 190...
by urga
Oct 24 2018 2:40pm
Forum: E-Bike Non-hub Motor Drives
Topic: Full suspension mountain bike Friction Drive
Replies: 103
Views: 4264

Re: Full suspension mountain bike Friction Drive

Looks great ,John,even more stealthy than the road setup. Are you considering rethinking your road setup now ? Using regen makes sense no matter what bike it's on. Obviously you would have to review the motor engagement system or perhaps have it permanently engaged like the mtb? Not sure roadies wou...
by urga
Oct 14 2018 11:50am
Forum: E-Bike Non-hub Motor Drives
Topic: Full suspension mountain bike Friction Drive
Replies: 103
Views: 4264

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 acti...
by urga
Oct 12 2018 3:48pm
Forum: E-Bike Non-hub Motor Drives
Topic: Full suspension mountain bike Friction Drive
Replies: 103
Views: 4264

Re: Full suspension mountain bike Friction Drive

Yeah,no worries. Sorry John
by urga
Oct 12 2018 3:17pm
Forum: E-Bike Non-hub Motor Drives
Topic: Full suspension mountain bike Friction Drive
Replies: 103
Views: 4264

Re: Full suspension mountain bike Friction Drive

That's really helpful,thanks So are you running 4S2P on 18650's or are you running a Lipo pack? If you are what assist time are you getting? I like to use the assist very little ,and like you,I like to spin up climbs.I've bought some 26650 cells which are rated at 5000mAh which I plan to fit inside ...
by urga
Oct 12 2018 1:53pm
Forum: E-Bike Non-hub Motor Drives
Topic: Full suspension mountain bike Friction Drive
Replies: 103
Views: 4264

Re: Full suspension mountain bike Friction Drive

FZbob, You really need to use belt sander material as the cloth backing gives you some longevity.The grip tape is something like 80 and will chew your rubber up very quickly. I use 180,but I would have went finer if I could have sourced it quickly.I initially tried 240 wet and dry paper to see what ...
by urga
Oct 12 2018 9:29am
Forum: E-Bike Non-hub Motor Drives
Topic: Full suspension mountain bike Friction Drive
Replies: 103
Views: 4264

Re: Full suspension mountain bike Friction Drive

That looks amazingly clean,John. I understand why you recommended the 7S,just wondering what the repercussions of using a 5S would be,since I would like to keep rpm as low as possible. Not too worried about getting a big amount of power out of the system . Any good websites out there regarding using...
by urga
Oct 12 2018 3:09am
Forum: E-Bike Non-hub Motor Drives
Topic: Full suspension mountain bike Friction Drive
Replies: 103
Views: 4264

Re: Full suspension mountain bike Friction Drive

That's nice setup FZbob. I'm still looking at using a 60KV motor with a 5S battery . John suggests 24V (7S),can I ask why so high with the voltage if we are trying to keep the rpms down. I know these motors run most efficiently at around much higher rpms,so can anyone shed light on what would happen...
by urga
Oct 08 2018 5:36am
Forum: E-Bike Non-hub Motor Drives
Topic: Full suspension mountain bike Friction Drive
Replies: 103
Views: 4264

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 t...
by urga
Oct 07 2018 1:47pm
Forum: E-Bike Non-hub Motor Drives
Topic: Full suspension mountain bike Friction Drive
Replies: 103
Views: 4264

Re: Full suspension mountain bike Friction Drive

Yes,I seen that post. I was worried that this wouldn't be suitable on a carbon frameset as they advise against clamping forces here.I loved what he did with the rest of his setup.I used Kepler's mounting bracket which worked fine after some machining,albeit I now have a creaking BB,which ,ironically...
by urga
Oct 07 2018 9:39am
Forum: E-Bike Non-hub Motor Drives
Topic: Full suspension mountain bike Friction Drive
Replies: 103
Views: 4264

Re: Full suspension mountain bike Friction Drive

Interesting. Could that regen threshold be modified via the vesc,or it's inherrent to the KV of the motor and V input? The more I begin to understand about using outrunners the more I can appreciate why you pursued the FD method. The 11:1 reduction circumnavigates the main problem I'm having getting...
by urga
Oct 04 2018 11:47am
Forum: E-Bike Non-hub Motor Drives
Topic: Full suspension mountain bike Friction Drive
Replies: 103
Views: 4264

Re: Full suspension mountain bike Friction Drive

Googles 'Sprag clutch' :? I was thinking of modifying a single speed freehub,but these are much better! Scooterman, is this the kind of thing your thinking of? http://www.chainreactioncycles.com/hxr-components-easy-shift-enduro-crankset/rp-prod157401?gs=1&sku=sku575489&pgrid=60711843258&ptaid=pla-42...
by urga
Oct 03 2018 10:43am
Forum: E-Bike Non-hub Motor Drives
Topic: Full suspension mountain bike Friction Drive
Replies: 103
Views: 4264

Re: Full suspension mountain bike Friction Drive

John,can this Bluetooth module be used ? https://flipsky.net/collections/accesso ... rd-ws82013 ie with the metr app?
by urga
Oct 03 2018 10:39am
Forum: E-Bike Non-hub Motor Drives
Topic: Full suspension mountain bike Friction Drive
Replies: 103
Views: 4264

Re: Full suspension mountain bike Friction Drive

That's spooky because I've just ordered a mini vesc from Flipsky (same one? ) I too am trying to get everything inside a bottle(albeit I'm hoping to custom build the battery from cells) with a socket at the bottom for quick change overs.I imagine the permanent drag is of no consequence on a mtb's fa...
by urga
Oct 02 2018 3:56pm
Forum: E-Bike Non-hub Motor Drives
Topic: Full suspension mountain bike Friction Drive
Replies: 103
Views: 4264

Re: Full suspension mountain bike Friction Drive

Just bumping my gums again here.Looking at John's picture of the Trek,would it not be possible to leave the motor sited where it is, complete with it's shaft and a small 9T cog . This would engage just after the crank and shouldn't be too affected by chainline. It would only work on a 1x setup. Norm...
by urga
Oct 02 2018 12:35pm
Forum: E-Bike Non-hub Motor Drives
Topic: Full suspension mountain bike Friction Drive
Replies: 103
Views: 4264

Re: Full suspension mountain bike Friction Drive

John, I know you stated that you couldn't mount the drive via the chainstays. Can I ask why ? If the drive could be clamped to the stays it would mitigate having to have the motor move with the suspension arc. What you have done is clever but would not work on some other suspension systems.But then ...
by urga
Oct 01 2018 1:46pm
Forum: E-Bike Non-hub Motor Drives
Topic: Full suspension mountain bike Friction Drive
Replies: 103
Views: 4264

Re: Full suspension mountain bike Friction Drive

Oh I would LOVE to convert one of my mtb's to this, but, I don't think it would last a week. First boulder chute would possibly destroy the motor and mount.Definitely works on dry trail centres as John has proved in the video though.Horses for courses etc... The only system that works for technical ...
by urga
Sep 29 2018 5:42am
Forum: Items for Sale - New
Topic: Kepler Bottom Bracket Friction Drive For Sale (Finally)
Replies: 298
Views: 31069

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

OK, I've got a replacement battery coming from Hobbyking.Which is nice! In the meantime I've been looking at building my own battery pack from 26650 Li ion cells.Has anyone any experience with using these? Also,since I'll struggle to get 12(6S2P) of these into a tool bottle holder,what's more import...
by urga
Sep 22 2018 4:14pm
Forum: Items for Sale - New
Topic: Kepler Bottom Bracket Friction Drive For Sale (Finally)
Replies: 298
Views: 31069

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

Can't help you with the code,i'm afraid ,but the button throttle is great . I had my first longish run today 90 mins,using the motor for about 30 mins of that(need to get the bluetooth app)Disappointed with the battery life as it died before the end. I was expecting around 45 mins from a 8000mAH so ...
by urga
Sep 20 2018 3:28pm
Forum: Items for Sale - New
Topic: Kepler Bottom Bracket Friction Drive For Sale (Finally)
Replies: 298
Views: 31069

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

Top man ,John. Very much appreciated. I'll post a pic of the completed bike once I tidy everything up.
:D
by urga
Sep 19 2018 12:51pm
Forum: Items for Sale - New
Topic: Kepler Bottom Bracket Friction Drive For Sale (Finally)
Replies: 298
Views: 31069

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

Yes it's moving freely,however because of the small notch filed away,the swingarm now allows the motor to go all the way up to the anti rotation plate bolt. Consequently this causes the motor to climb too high and bind when deactivated. I'll modify the plate to acheive the pivot axle and rear axle t...
by urga
Sep 18 2018 12:56pm
Forum: Items for Sale - New
Topic: Kepler Bottom Bracket Friction Drive For Sale (Finally)
Replies: 298
Views: 31069

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

Hi John Yes I had already tried it all the way up and forward with no success.The arc of the swing arm starts to take the motor away from the tyre eventually. Nevertheless I filed a small indent in the swing arm to allow it to go all the way until the motor body touches the bolt.I still will never a...
by urga
Sep 17 2018 12:36pm
Forum: Items for Sale - New
Topic: Kepler Bottom Bracket Friction Drive For Sale (Finally)
Replies: 298
Views: 31069

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

Hi John Try this now https://youtu.be/64tEv7lcBLk So the rubber coating is a waste of time ? I'll defer to your greater experience here and try some fine grip tape I took the bike out for a quick spin after work . I tightened the spring right up until the motor was constantly touching the tyre and i...