Hey how are you guys contacting Leaf to ask questions? I emailed a question about the kit a few weeks ago and got no response. I see there's a link to 'ask a question' but it points to msn messenger, and apparently that service was shut down a year ago.
Leaf / leafmotor / leafbike high efficiency 1500w motor
- Thread starter neptronix
- Start date
Lurkin
100 kW
I was ignored until I purchased a motor. Then the answers were instant.
Ask for Peter using sales@leafbike.com
Mention you want to purchase a motor and they should respond within a few days.
Cheers
Mention you want to purchase a motor and they should respond within a few days.
Cheers
Kodin
1 kW
In one case it took a couple days for a response, but once the conversation started, it was pretty much within 12 hours or so unless they had to do homework and consult the engineers.
Lupulin
10 mW
I am interested in getting a 1500W Leaf motor in a 20" rim. Should I get just the hub and build the wheel myself, or is the quality pretty good? I'm leaning toward just getting the hub and finding some matching rims and building the wheels. Thanks for the feedback.
Lurkin
100 kW
Get the hub and put it together with a quality rim and spokes.
liveforphysics
100 TW
Lurkin said:
+1
+2liveforphysics said:
I did this reusing my the rim and spokes from my Stealth supplied HS4065. Worked well as most of these DD hub motors have very similar spoke flange dimensions.
Cheers
Allex
100 MW
What rim(MTB) would you recommend. And where do you guys source your spokes?
For a rim that small, consider a 17-inch moped rim.
You shouldn't need to ask as you already make the best rims Allex.Allex said:
http://www.alexrims.com/product.asp?sc=0&cat=25
These are E-bike specific rims.
I used a 20" DM24 to lace my recumbent commuter wheel.
It's extremely strong, and I would take it off-road if the bike could handle it.
Spokes are 13/14g Sapim strong. I had to cut and re-thread them a few times to get the length right and they are still doing well.
This wheel has held up nicely for over 5000km and several bad crashes with just 2 minor true ups necessary.
Cheers
sendler2112
100 kW
Which winding would I need for a 45 mph top speed with a 77v battery and 26" wheel? Will a 9 speed freewheel fit?
In a 26-inch tire outer diameter, 45-MPH , 72 km/h, is 582 RPMs.
If you subscribe to the position that unloaded Kv will be about 10% higher, then unloaded would be about 640 RPMs, and since an unfaired bicycle above 30 MPH would have significant wind resistance, maybe add another 5%, so...672 RPMS unloaded?
672 /77= a Kv of 8.7
That is halfway between the 5T and the 6T, maybe go for the slower 6T since we are talking about bicycles, and possibly restore some of the top speed with aero fairings?
If you subscribe to the position that unloaded Kv will be about 10% higher, then unloaded would be about 640 RPMs, and since an unfaired bicycle above 30 MPH would have significant wind resistance, maybe add another 5%, so...672 RPMS unloaded?
672 /77= a Kv of 8.7
That is halfway between the 5T and the 6T, maybe go for the slower 6T since we are talking about bicycles, and possibly restore some of the top speed with aero fairings?
sendler2112
100 kW
6T always simulates well for 45 mph at 77V with the NineC motors. It is going on this with full aero fairngs:
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6T Leafbike would be slightly slower than 6T 9C, due to wider stator causing longer wire runs on each coil, but...should still be close.
Kodin
1 kW
72V with a 5T should hit about the maximum current handling you can eke out of this motor before heat-saturation. ~40-45 MPH on the flat with a 26" wheel. Do the math for smaller sizes.
sendler2112
100 kW
I see that my 9 speed chain should work fine with a 7 speed freewheel so I will just get a new shifter and run 7 speed in the rear.sendler2112 said:
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http://www.sheldonbrown.com/speeds.html
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markz
100 TW
That Sheldon Brown is awesome isnt it, I seem to find most of my info there. Here is a quote from the link you provided.
When I first read that I was confused, but its taking about the SIZE OF THE CHAIN, so 7 and 8 are the same sized chain with very minimal differences, so a 9 would work on 7/8. Thus 10 would work on 9.
What about upwards, 9 on 10, 7/8 on 9?
Terminology would have been put like this perhaps
However, using a chain one size LARGER or NARROWER than standard rarely presents any problem.
When I first read that I was confused, but its taking about the SIZE OF THE CHAIN, so 7 and 8 are the same sized chain with very minimal differences, so a 9 would work on 7/8. Thus 10 would work on 9.
What about upwards, 9 on 10, 7/8 on 9?
Terminology would have been put like this perhaps
However, using a chain one size LARGER or NARROWER than standard rarely presents any problem.
Lupulin
10 mW
Cowardlyduck said:+2liveforphysics said:
I did this reusing my the rim and spokes from my Stealth supplied HS4065. Worked well as most of these DD hub motors have very similar spoke flange dimensions.
Cheers
Thanks for the feedback! I am interested in making a dual 20" 406 "Mid tail" bike. More or less like a Juiced Riders ODK, but with a triangle to carry the battery. I started another thread in the General Discussions section. If anyone could help me out over there (as not to hijack this thread), I am looking for some help with components (controller, battery/supplier) I'm leaning towards EM3EV for most things, but unsure on which to get.
Great discussion here on the Leaf motor, I would have never known about it if it wasn't for this thread. I'd like to thank Nep for throwing down his own $$$ and willingness to push these motors to their performance limits! Great thread and also the comparison to the Mac. I love this place.
Lupulin
10 mW
spinningmagnets said:
Why? I'm looking for a top speed of low 30's (MPH) and to cruise along around 25 Mph. I was under the impression that 20" wheels are stronger than an equivalent 26" or 700c. I thought the moped rims/tires were more for extreme power levels? I would prefer to stick to standard bicycle parts, but will keep an open mind
Putting a hub this diameter into a 20-inch bicycle rim will cause severe spoke angles. It will work, so no problem doing that. I just wanted to let you know that a 17-inch moped rim/tire is a similar size to a 20-inch bicycle, and it's worth considering.
Moped and motorcycle rims have angled nipple holes, so they can be laced with severe spoke angles without stressing the spoke. A 2-inch wide steel motorcycle rim is unnecessarily heavy, but...a fairly light aluminum single-wall moped rim about 1.6-inches wide will comfortably seat tires from 2.4 to 3.2-inches wide.
https://www.electricbike.com/moped-rims-tires-hubmotors/
Moped and motorcycle rims have angled nipple holes, so they can be laced with severe spoke angles without stressing the spoke. A 2-inch wide steel motorcycle rim is unnecessarily heavy, but...a fairly light aluminum single-wall moped rim about 1.6-inches wide will comfortably seat tires from 2.4 to 3.2-inches wide.
https://www.electricbike.com/moped-rims-tires-hubmotors/
Good advice spinning magnets.spinningmagnets said:
The reason I had to cut and rethread my spokes above was because I initially tried single cross, but could not get it to work as the spoke angle was too severe.
I would suggest radial lacing is a good option for a 20" rim in these diameter motors since the leverage on the spokes is reduced and the shorter spoke length reduces flexing. The 5000+km on mine is testament to it being a viable option, and I don't ride softly.
Cheers
mchlpeel
100 W
Has anyone managed to get the Temp sensor to work with the Cycle Analyst V3?
