Search found 257 matches

by Drum
Jul 18 2014 3:30pm
Forum: EBike Non-hub Motor Drives
Topic: BIG BLOCK alternative Motor
Replies: 452
Views: 98253

Re: BIG BLOCK GNG alternative Motor

Ok, now I have read a bit more on the Kelly controller, I find that the pole count is only needed to achieve certain specific things, and is not needed for basic running of the motor. I would still like to understand the pole count though.. I have asked Uncle Google, and come up with a large number ...
by Drum
Jul 16 2014 1:45am
Forum: EBike General Discussion
Topic: Anyone build a kids ebike?
Replies: 12
Views: 1335

Re: Anyone build a kids ebike?

Not really relevant to your query because of the age / size difference, but I did build an e-bike for my 3 year old grandson as a Christmas present last year. It was my first electric vehicle build, and has been very successful. As a first bike for a 3yo, we wanted it to be easy to ride and control,...
by Drum
Jul 14 2014 6:00pm
Forum: EBike Non-hub Motor Drives
Topic: Downhill project motorcycle transmission
Replies: 304
Views: 39496

Re: Downhill project motorcycle transmission

Hi Ecobogan, That's coming along really well. Relatively compact, no clearance issues and the weight is low and forward. Looking forward to seeing it finished! As far as fitting the gear to the 1/2" shaft of the Astro, Matt ("Recumpence" on ES forums) makes really well engineered driv...
by Drum
Jul 14 2014 2:57pm
Forum: EBike Non-hub Motor Drives
Topic: Kona Stinky, no pedals, big block on swingarm.
Replies: 81
Views: 16974

Re: Kona Stinky, no pedals, big block on swingarm.

Hi Jakob, Having the motor mounted to a swingarm forward extension like your drawing shows can work for bikes used on the road, but I would not mount a motor that way for an off-road bike. As you say, ground clearance would be an issue when the suspension was compressed, but also the "unsprung ...
by Drum
Jul 13 2014 4:02pm
Forum: EBike Non-hub Motor Drives
Topic: Kona Stinky, no pedals, big block on swingarm.
Replies: 81
Views: 16974

Re: Kona Stinky, no pedals, big block on swingarm.

A bit more progress: I got the swingarm halves cut down and the rear axle mount brackets welded on. 2014-07-10 15.21.15.jpg 2014-07-14 08.19.58.jpg 2014-07-14 08.23.50.jpg I have also had my motor and controller connected and working on 24V, and had a bit of a play with the controller settings. I st...
by Drum
Jul 13 2014 3:11pm
Forum: EBike Non-hub Motor Drives
Topic: BIG BLOCK alternative Motor
Replies: 452
Views: 98253

Re: BIG BLOCK GNG alternative Motor

Hi All, I got my motor connected to the Kelly controller yesterday and spinning, using two 12V gel cell batteries in series. Started with everything at minimum current and response speed settings and worked up from there. Matching colors on motor phase wires and Hall sensor wires seemed to work well...
by Drum
Jul 04 2014 4:58am
Forum: EBike Non-hub Motor Drives
Topic: BIG BLOCK alternative Motor
Replies: 452
Views: 98253

Re: BIG BLOCK GNG alternative Motor

My BHT 1kW motor has arrived! A few fins slightly bent but no significant damage.. the box was still in good condition. It took about 15 days to arrive to my small town in New Zealand from date of order. The parcel was dispatched from Malaysia by DHL express. 99 Euro for the motor and 84.56 Euro for...
by Drum
Jul 04 2014 4:40am
Forum: EBike Non-hub Motor Drives
Topic: Kona Stinky, no pedals, big block on swingarm.
Replies: 81
Views: 16974

Re: Kona Stinky, no pedals, big block on swingarm.

My motor has arrived! BHT brushless motor with hall effect sensors, nominal 1kW @ 48V, but proven to be capable of much higher performance. A few fins slightly bent but no significant damage.. the box was still in good condition. It took about 15 days to arrive to my small town in New Zealand from d...
by Drum
Jun 30 2014 1:29pm
Forum: EBike Non-hub Motor Drives
Topic: Wirefly: Freeride/Commuter Project
Replies: 75
Views: 19184

Re: Wirefly: Freeride/Commuter Project

Wow, that's awesome progress for one day!
I know it helps having the high-end tools, and obviously the skills and experience to use them properly, but even so that's impressive.
Keep up the good work!
Dave
by Drum
Jun 26 2014 4:07am
Forum: EBike Non-hub Motor Drives
Topic: Kona Stinky, no pedals, big block on swingarm.
Replies: 81
Views: 16974

Re: Kona Stinky, no pedals, big block on swingarm.

Hi Jacketful, Just looked at your build thread.. looks great! If this bike works well, but the footpeg position etc seem to limit it, then the next step would be to build a frame and transfer the electrics across to it.. then I could avoid having to make so many compromises. Before that though, I wi...
by Drum
Jun 26 2014 3:29am
Forum: EBike Non-hub Motor Drives
Topic: Downhill project motorcycle transmission
Replies: 304
Views: 39496

Re: Downhill project motorcycle transmission

Looking forward to seeing more progress on this one.. I'm following it with interest. I think it is a set-up well worth exploring. My build has a big motor and single reduction ratio, but I can see that a smaller motor with several ratios has some advantages. As to weight, the BHT motor I am using w...
by Drum
Jun 25 2014 2:54pm
Forum: EBike Non-hub Motor Drives
Topic: Kona Stinky, no pedals, big block on swingarm.
Replies: 81
Views: 16974

Re: Kona Stinky, no pedals, big block on swingarm.

Hi Ferret and Jacketful, Thanks for your comments! Footpeg position: Yes, footpegs mounted to the frame, or at least a non-moving part of the swingarm close to the pivot, would be better. If I was building a frame from scratch, I would build a twin cradle frame like BZH has, and have a good place to...
by Drum
Jun 25 2014 4:07am
Forum: EBike Non-hub Motor Drives
Topic: Kona Stinky, no pedals, big block on swingarm.
Replies: 81
Views: 16974

Re: Kona Stinky, no pedals, big block on swingarm.

Here's how the back wheel looks in its furthest back position.. the adjusters will let it come up to 25mm forward of this position. The gap between the back tyre and the motor will vary between 25 and 50mm. I want to put some sort of mudguard here to protect the motor from mud, rocks etc thrown by t...
by Drum
Jun 24 2014 4:25am
Forum: EBike Non-hub Motor Drives
Topic: Kona Stinky, no pedals, big block on swingarm.
Replies: 81
Views: 16974

Re: Kona Stinky, no pedals, big block on swingarm.

Two new toys arrived today, one small and one big: 1) The controller turned up from Kelly Controllers: a KBS72121X. I find it hard to believe that such a small unit can punch out the power it claims (rated at 72V, 120A peak, but other users are pushing them beyond those figures), but it does feel re...
by Drum
Jun 12 2014 2:46am
Forum: EBike Non-hub Motor Drives
Topic: Kona Stinky, no pedals, big block on swingarm.
Replies: 81
Views: 16974

Re: Kona Stinky, no pedals, big block on swingarm.

Hi Spinning, I expect that someone has made something like this before, but I guess the higher power mid-drive type motor becoming more readily available will make them more common. This will be on the right of my double-disc-flange hub, with a standard left side disc brake, but of course it could b...
by Drum
Jun 11 2014 4:42am
Forum: EBike Non-hub Motor Drives
Topic: Kona Stinky, no pedals, big block on swingarm.
Replies: 81
Views: 16974

Re: Kona Stinky, no pedals, big block on swingarm.

I got the rear sprocket adapter back from waterjet cutting today. (Anyone in NZ who wants waterjet cutting done, I have put a lot of work through Roadrunner Manufacturing in Bulls, and have always been very pleased with the result, the service and the price). Couldn't resist getting out into the col...
by Drum
Jun 06 2014 7:41pm
Forum: EBike Non-hub Motor Drives
Topic: Kona Stinky, no pedals, big block on swingarm.
Replies: 81
Views: 16974

Re: Kona Stinky, no pedals, big block on swingarm.

Some more progress.. I have drawn up a few components for waterjet cutting, made a couple more, and received my double - disc - flange rear hubs from ES member Stevil-Knevil. I have also bought a wide, strong 24" rim and 24 x 3" Duro Wildlife Leopard tyre and inner tube. (So much for the &...
by Drum
Jun 02 2014 2:32pm
Forum: EBike Non-hub Motor Drives
Topic: Direct Drive Genesis
Replies: 361
Views: 65419

Re: BHT Brushless Motor meets the Genesis Farfle

I like your freewheel adapter.. good use of available resources, and as long as the hub flange is well connected to the threaded portion, it looks strong enough and as light as possible. I see you have two chainrings on the crankset.. are you planning a two-speed setup with a front derailleur? Good ...
by Drum
May 27 2014 4:53am
Forum: EBike Non-hub Motor Drives
Topic: Wirefly: Freeride/Commuter Project
Replies: 75
Views: 19184

Re: Wirefly: Freeride/Commuter Project

Looks really interesting Standfast. I will be following this build. Looks like we are seeing a new class of vehicle emerging.. a crossover .. a "Pedalless Bicycle" or Ultralight electric motorcycle using mostly bicycle components. Now BZH & Skeetab have got their BHT powered bikes runn...
by Drum
May 26 2014 2:48pm
Forum: EBike Non-hub Motor Drives
Topic: BIG BLOCK alternative Motor
Replies: 452
Views: 98253

Re: BIG BLOCK GNG alternative Motor

Wow, Thanks for the amazingly prompt and detailed response to my question, Crossbreak!! I agree that if we get as much performance as we need in Star, there is no point in modifying the motor or making the system more complicated. However, that information might be useful to someone in future. Inter...
by Drum
May 26 2014 5:03am
Forum: EBike Non-hub Motor Drives
Topic: BIG BLOCK alternative Motor
Replies: 452
Views: 98253

Re: BIG BLOCK GNG alternative Motor

Hi Crossbreak, thanks for posting that photo. 2 questions: 1) the hall sensor circuit board is quite skewed.. are the sensors correctly positioned and ok? 2) By the sound of it, you understand motor theory well. I know a little, but would appreciate your comments (and from others who understand moto...
by Drum
May 25 2014 2:09pm
Forum: EBike Non-hub Motor Drives
Topic: Direct Drive Genesis
Replies: 361
Views: 65419

Re: BHT Brushless Motor meets the Genesis Farfle

Great news! I hoped it was something like that causing the issue.
There are so many factors that all have to be right. Well done getting it all sorted.

I think it is time to get the credit card out!
Dave
by Drum
May 25 2014 4:04am
Forum: EBike Non-hub Motor Drives
Topic: LMX P2 : Freeride trials motorcycle frame development
Replies: 999
Views: 230740

Re: LMX P2 : Freeride trials motorcycle frame

Hi Adam, A question about the torque of this motor from a standstill. Skeetab is having trouble accelerating from stopped.. hopefully he can get that sorted. You said yours "pulls like a train from 5 - 50 kph". How is it with the Kelly controller pulling away from stopped and below 5kph? C...
by Drum
May 25 2014 12:58am
Forum: EBike Non-hub Motor Drives
Topic: Direct Drive Genesis
Replies: 361
Views: 65419

Re: BHT Brushless Motor meets the Genesis Farfle

Me too. Like Standfast, I am going pedal-less and ride offroad in an area with steep hills. It is really important for me to have strong torque right from literally zero rpm, as I will not be able to pedal to get a bit of speed, and want to be able to start on a steep uphill. I have held off orderin...
by Drum
May 25 2014 12:36am
Forum: EBike Non-hub Motor Drives
Topic: Comparison between RC and ebike controllers?
Replies: 96
Views: 10238

Re: Comparison between RC and ebike controllers?

Hi All, I am not an expert, but have been reading a lot recently to increase my understanding of these motors / controllers. If I understand correctly: RC motors in general do not have hall effect sensors, whereas most e-bike motors do have them. Hall effect sensors, and the controllers that use the...