Search found 35 matches

by Grantmac
Dec 12 2018 6:31pm
Forum: E-Bike General Discussion
Topic: Compound Gearing with two IGH
Replies: 8
Views: 179

Re: Compound Gearing with two IGH

I've tossed around the idea of an IGH as a jackshaft/transmission. Best way to do it IMHO is to keep the bicycle drive train pedal powered then run the IGH output to the left side using a BMX chain. So you pick the motor speed with the IGH and your cadence with the bicycle gears. I'd keep the IGH sp...
by Grantmac
Dec 11 2018 12:02am
Forum: E-Bike General Discussion
Topic: Lightest motor for hill climbing and 135mm dropout with disk brake?
Replies: 19
Views: 826

Re: Lightest motor for hill climbing and 135mm dropout with disk brake?

Can you post a picture of the bike? I have a friend with a handcycle using a BBS02 which she loves.
A mid drive to IGH would be pretty slick.
by Grantmac
Dec 08 2018 12:26pm
Forum: E-Bike General Discussion
Topic: Notes on my first build, rear belt drive
Replies: 15
Views: 427

Re: Notes on my first build, rear belt drive

I wonder if a child's bicycle rim could be used in place of the 3D printed pulley? Possibly with some cogs bolted through the spoke holes to engage the belt.
by Grantmac
Dec 07 2018 8:37pm
Forum: E-Bike Non-hub Motor Drives
Topic: Sur-Ron - New Mid drive Bike
Replies: 2771
Views: 161140

Re: Sur-Ron - New Mid drive Bike

Snowmobiles and some ATVs use a cable thumb throttle which you may be able to swap in to activate the stock cable.
Just FYI.
by Grantmac
Dec 07 2018 8:15pm
Forum: Battery Technology
Topic: Multiple BMS
Replies: 6
Views: 265

Re: Multiple BMS

Mine are ATL pouch cells with, I assume, welded tabs. I'll need to get a look at how they are connected.
18s 100a BMS might be an easy solution that would run hobby lipos down the road.
by Grantmac
Dec 07 2018 12:49pm
Forum: Battery Technology
Topic: Multiple BMS
Replies: 6
Views: 265

Re: Multiple BMS

I haven't yet torn down the packs to see how easily they can be reconfigured. If they are welded 9s1p it might be a challenge.

In hindsight multistar 16000s would have been easier.
by Grantmac
Dec 07 2018 10:39am
Forum: Battery Technology
Topic: Multiple BMS
Replies: 6
Views: 265

Re: Multiple BMS

Thanks for that. It seems I'm probably not going to be able to run with the existing BMS' although I may do a few test runs.
Starting to think perhaps a different battery source would have been easier to deal with, even one without BMS.
by Grantmac
Dec 07 2018 10:36am
Forum: E-Bike Non-hub Motor Drives
Topic: new cyclone 3000 w mid-drive kit?
Replies: 3084
Views: 295970

Re: new cyclone 3000 w mid-drive kit?

Should I run out of battery I'd just remove the primary chain.
I agree that pedaling through the motor would be extremely tiring, then again I'm trying to build a bike I can pedal along with but always running at least a little assist.
by Grantmac
Dec 05 2018 3:25pm
Forum: E-Bike Non-hub Motor Drives
Topic: new cyclone 3000 w mid-drive kit?
Replies: 3084
Views: 295970

Re: new cyclone 3000 w mid-drive kit?

I too am interested a 11t non freewheeling sprocket, I figure if the batteries die I can just remove the primary chain.
In theory with a 3spd fixie IGH you could run regen with the cranks freewheeling.
by Grantmac
Nov 27 2018 8:25pm
Forum: E-Bike Non-hub Motor Drives
Topic: Direct-Drive conversion of the new GNG/cycmotor X1-pro 3000w
Replies: 17
Views: 884

Re: Direct-Drive conversion of the new GNG/cycmotor X1-pro 3000w

A large CS and rear sprocket would make for better clearance, chain life and possibly keep lube off the disk as well. I've been mulling something similar but keeping the motor sprocket on the right then using a fixie IGH as a 3spd jackshaft which would output on the left. Possibly with a belt as pri...
by Grantmac
Nov 27 2018 7:58pm
Forum: E-Vehicles General Discussion
Topic: Super73 Z with additional Mid-Drive motor
Replies: 1
Views: 204

Re: Super73 Z with additional Mid-Drive motor

Excess weight for nothing to keep the hub motor. Also I highly doubt the battery will handle a cyclone.
by Grantmac
Nov 23 2018 6:14pm
Forum: E-Bike General Discussion
Topic: Groundbreaking Innovation On The E-bike!!
Replies: 16
Views: 794

Re: Groundbreaking Innovation On The E-bike!!

Nope, there are so many other useful innovations that could be made instead.
by Grantmac
Nov 18 2018 6:20pm
Forum: E-Bike Non-hub Motor Drives
Topic: IT'S ALIVE...... BBS02HD!!
Replies: 15
Views: 920

Re: IT'S ALIVE...... BBS02HD!!

With the controller?
by Grantmac
Nov 18 2018 5:00pm
Forum: E-Bike Non-hub Motor Drives
Topic: IT'S ALIVE...... BBS02HD!!
Replies: 15
Views: 920

Re: IT'S ALIVE...... BBS02HD!!

Where did you get the BBSHD core and what was the cost?
by Grantmac
Nov 18 2018 7:34am
Forum: E-Bike General Discussion
Topic: Buying a bike helmet for my son
Replies: 7
Views: 219

Re: Buying a bike helmet for my son

Skateboard helmets also protect the back of the head much more from a rearward fall compared to many bike helmets.
Personally if I'm going 30mph then I'm using something with face protection which covers the back of my head such as a lightweight dirt bike helmet.
by Grantmac
Nov 18 2018 7:31am
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.

I was going to mention the Kepler/other friction drives. Very inconspicuous, light, removable and can be built specifically to climb. Also an easy DIY if you can do any design or machining. With a controllable mount you can run regen on the downhill then pedal the flats with zero drag. A rubber fric...
by Grantmac
Nov 16 2018 11:54pm
Forum: E-Bike Technical
Topic: A portable gasoline generator for long range
Replies: 28
Views: 724

Re: A portable gasoline generator for long range

An electromagnetic clamp to limpet onto semi trucks.
by Grantmac
Nov 15 2018 11:26am
Forum: Battery Technology
Topic: Multiple BMS
Replies: 6
Views: 265

Multiple BMS

I've purchased a set of 10 Swagtron hover board batteries to power my ebike build. These are a 9s1p 2.9Ah pack with a BMS that handles charge, discharge and temperature monitoring. My initial plan was to run 5 of these packs in parallel then wire the two "bricks" in series for 66v nominal. I'll be b...
by Grantmac
Nov 14 2018 11:40pm
Forum: E-Bike Non-hub Motor Drives
Topic: Hub as friction drive
Replies: 12
Views: 451

Re: Hub as friction drive

Well I've decided to head a different direction since a cyclone just fell in my lap and I'm a hotrodder at heart. However just as that happened came across this little gem: http://www.qiroll.com It says 260w but I'm wondering if that's underrated like a lot of the Chinese stuff. It looks like a very...
by Grantmac
Nov 12 2018 1:19pm
Forum: E-Bike Non-hub Motor Drives
Topic: Hub as friction drive
Replies: 12
Views: 451

Re: Hub as friction drive

The Esk8 controllers run in parallel and aren't terribly expensive (plus wireless throttle is cool if it's not buggy). So trying to run them in tandem probably isn't worth it. My thoughts on using two wheels was halving both heat build up in the motors while also reducing traction demands between th...
by Grantmac
Nov 11 2018 12:17pm
Forum: E-Bike Non-hub Motor Drives
Topic: Hub as friction drive
Replies: 12
Views: 451

Re: Hub as friction drive

Running a pair of these in tandem: https://flipsky.net/collections/accessories/products/flipsky-fs9056-83-56mm-hub-motor-67kv-1100w At about 500w each is what I'm thinking. Two rollers should have twice the roller to tire traction and the roller surface is replaceable, plus may wear to the same shap...
by Grantmac
Nov 10 2018 6:28pm
Forum: E-Bike Non-hub Motor Drives
Topic: Hub as friction drive
Replies: 12
Views: 451

Re: Hub as friction drive

I wasn't seriously considering a friction drive for my commuter (20 miles round trip, fairly flat). But it seems reasonably possible. What about a pair of skateboard hub motors? They seem to have regen, a durable friction surface (tire) and even a wireless controller with cruise control. The bearing...
by Grantmac
Nov 10 2018 12:33pm
Forum: E-Bike Non-hub Motor Drives
Topic: Hub as friction drive
Replies: 12
Views: 451

Re: Hub as friction drive

Motor surface speed=road speed is very logical. Which does let the motor act as though the rim is just the diameter of its outer casing so a lower diameter/higher KV motor can be used. The inspiration for this was the RC friction drive someone posted. The main reasons behind my thought exercise was ...
by Grantmac
Nov 09 2018 5:35pm
Forum: E-Bike Non-hub Motor Drives
Topic: Hub as friction drive
Replies: 12
Views: 451

Hub as friction drive

Anyone tried mid mounting a small diameter hub and running it as a friction drive? Not that I'm seriously considering it, but it's an interesting concept.