Search found 709 matches

by SlowCo
Apr 24, 2018 7:33 am
Forum: E-Scooter and Motorcycle Photos & Videos
Topic: Andre´s GSXR 1000 K2 with QS Motor 273 80H, 34kW
Replies: 170
Views: 16526

Re: Andre´s GSXR 1000 K2 with QS Motor 273 80H, 34kW

In addition to Luke's remarks: with very low air pressure the radius from the axle to the ground (contact patch tire/ground) will be smaller resulting in a little lower gearing at take off. As soon as the speed goes up the tire will "grow" to its maximum diameter and so to the highest "gearing". It'...
by SlowCo
Apr 23, 2018 12:53 pm
Forum: E-Scooter and Motorcycle Photos & Videos
Topic: Electric chopper trike build journal
Replies: 43
Views: 1261

Re: Electric chopper trike build journal

This will become a very comfortable ride! 8)
Love watching your progress and updates. Thanks for posting them.
by SlowCo
Apr 22, 2018 8:23 am
Forum: E-Bike General Discussion
Topic: How to improve my friction drive situation?
Replies: 20
Views: 776

Re: How to improve my friction drive situation?

Yes, the motor should be able to "climb" up into the tire. So that there is no need to use an external force to push the motor against the tire. And use an end stop to prevent the motor from going too far.
by SlowCo
Apr 21, 2018 10:14 am
Forum: Resources & EV Related Parts and Services
Topic: Duyunov wheel-hub motor
Replies: 18
Views: 1122

Re: Duyunov wheel-hub motor

Great developments!
I wish you all well and will follow the progress.
by SlowCo
Apr 20, 2018 4:05 pm
Forum: E-Bike General Discussion
Topic: Looking for people that own E-bikes
Replies: 27
Views: 506

Re: Looking for people that own E-bikes

But I have no volunteers so far? Why would anyone invest so much time chatting on Skype about ready made ebikes from a forum which has very few people riding ready made ebikes? And you even haven't put up a link to your blog for anyone interested to see what you're about. There are tons of youtube ...
by SlowCo
Apr 13, 2018 5:10 pm
Forum: E-Scooter and Motorcycle Photos & Videos
Topic: Electric Track Racer
Replies: 17
Views: 805

Re: Electric Track Racer

https://endless-sphere.com/forums/viewtopic.php?f=14&t=92488&p=1352776&hilit=qs205#p1352776 From that thread: As far as current draw I'm running a QS205 and MaxE combo dumping 14kw in which ends up being about 200 amps peak. You might need cooling in the form of ferrofluid or an internal fan. More ...
by SlowCo
Apr 13, 2018 8:57 am
Forum: E-Bike Photos & Video
Topic: First Project - Ribble Road Bike [Q128C]
Replies: 2
Views: 82

Re: First Project - Ribble Road Bike [Q128C]

Nice build 8)
Battery placement in the triangle is perfect. I suspect you'll be returning/keeping it there when you have commuted a few times with it in a back pack... :lol:
by SlowCo
Apr 13, 2018 3:15 am
Forum: E-Bike General Discussion
Topic: How to improve my friction drive situation?
Replies: 20
Views: 776

Re: How to improve my friction drive situation?

The geometry of your pivot point, motor and contact to the tire are still wrong. The pivot has to move forward so the motor can "climb" the tire better. See the posts from Chalo and SpinningMagnets under your first post.
by SlowCo
Apr 12, 2018 9:30 am
Forum: E-Scooter and Motorcycle Photos & Videos
Topic: Electric Track Racer
Replies: 17
Views: 805

Re: Electric Track Racer

What is the exact brand and type of hub motor you have?
by SlowCo
Apr 11, 2018 6:26 am
Forum: Stand-up E-scooters and E-skateboards
Topic: Off-road EV idea... need lots of help
Replies: 12
Views: 276

Re: Off-road EV idea... need lots of help

For the low speed and climbing you'll need a geared hub motor with the clutch disabled/welded. A low rpm (201) Q128 front wheel motor laced in a 16" or 20" rim would probably do the trick. Maybe even a Q100 would do as there will be 2 of them. https://bmsbattery.com/ebike-kit/301-q128-36v400w-500w-f...
by SlowCo
Apr 10, 2018 10:31 am
Forum: Stand-up E-scooters and E-skateboards
Topic: Off-road EV idea... need lots of help
Replies: 12
Views: 276

Re: Off-road EV idea... need lots of help

I'm intrigued but please upload the photo's directly to this forum as PhotoBucket doesn't seem to work. Make sure to resize them to <500kb before uploading.
by SlowCo
Apr 09, 2018 5:49 am
Forum: E-Bike Technical
Topic: Definitive Tests on the Heating and Cooling of Hub Motors
Replies: 2040
Views: 275715

Re: Definitive Tests on the Heating and Cooling of Hub Motors

Im just asking the question if no-one has the answer its fine :? Short answer: if you vent the side covers then first put on the varnish (and let it dry) then add ferrofluid. If you don't vent the side covers then don't put varnish on the internals of the hub motor as it will act as an heat insulat...
by SlowCo
Apr 09, 2018 4:16 am
Forum: E-Bike Technical
Topic: Definitive Tests on the Heating and Cooling of Hub Motors
Replies: 2040
Views: 275715

Re: Definitive Tests on the Heating and Cooling of Hub Motors

tolkaNo wrote:
Apr 09, 2018 3:52 am
amberwolf wrote:
Apr 08, 2018 8:26 pm
Do you know of a varnish that sticks to liquids?
Don't liquids dry at a certain point?
Google "ferrofluid" (=statorade) or look it up on YouTube. Then try to understand if it would work with varnish covering it.
by SlowCo
Apr 08, 2018 7:13 am
Forum: E-Bike General Discussion
Topic: Hearing protection while riding
Replies: 28
Views: 677

Re: Hearing protection while riding

Earplugs with a filter that lower the sounds but don't completely block them. Something like these:
https://www.amazon.com/gp/aw/d/B000V9PK ... B0032BYCWG
by SlowCo
Apr 06, 2018 10:28 am
Forum: E-Bike Reviews & Testing
Topic: My experience with "leafbike" electric bike kit
Replies: 23
Views: 9820

Re: My experience with "leafbike" electric bike kit

Please forgive me for barge in with my own dilemma, it's just that this particular post and replies are the closest answers to my questions. That 1500W motor should not be put in a front fork unless it is a solid steel non-suspension fork. And then still use two torque arms. So the advice is to use...
by SlowCo
Apr 05, 2018 12:48 pm
Forum: E-Bike General Discussion
Topic: MAC 10T @ 36V vs 12T @ 48V??
Replies: 24
Views: 529

Re: MAC 10T @ 36V vs 12T @ 48V??

If you're set on a hub motor maybe a low speed 201rpm Q128H is a better choice than a MAC: https://bmsbattery.com/ebike-kit/775-q128h-36v800w-rear-driving-ebike-hub-motor-ebike-kit.html A C128H from BMS Battery has a higher internal gear ratio (1:16 if I'm correct) than a MAC (1:5) so might have les...
by SlowCo
Apr 05, 2018 10:14 am
Forum: E-Bike General Discussion
Topic: MAC 10T @ 36V vs 12T @ 48V??
Replies: 24
Views: 529

Re: MAC 10T @ 36V vs 12T @ 48V??

If you slow down to under 10mph on climbs then a geared or direct drive hub motor will heat up too much. You should look into what E-S member LightningRods is building as a business. He makes left hand side mid drives that are independent from the bicycle drive train components. A set op like that w...
by SlowCo
Apr 04, 2018 4:01 pm
Forum: E-Bike General Discussion
Topic: MAC 10T @ 36V vs 12T @ 48V??
Replies: 24
Views: 529

Re: MAC 10T @ 36V vs 12T @ 48V??

markz wrote:
Apr 04, 2018 3:57 pm
Does a smaller diameter wheel give more torque in a geared hub, the same as direct drive?
Yes.
by SlowCo
Apr 04, 2018 1:49 pm
Forum: E-Bike General Discussion
Topic: MAC 10T @ 36V vs 12T @ 48V??
Replies: 24
Views: 529

Re: MAC 10T @ 36V vs 12T @ 48V??

The link you gave to the handcycle shows a vehicle with 24" wheels and not 26" as you stated in your first post. A 12T MAC in a 20" wheel would fit perfectly. Just swap the shock for a slightly longer one if you want to return to the same ride hight. But I don't think the 2" lowering at the rear axl...
by SlowCo
Apr 04, 2018 11:45 am
Forum: E-Bike General Discussion
Topic: MAC 10T @ 36V vs 12T @ 48V??
Replies: 24
Views: 529

Re: MAC 10T @ 36V vs 12T @ 48V??

A handcycle usually has a crank up high and a chain to the front wheel. If possible I would use a BBSHD with the smallest chainring and a large cassette on the wheel.
If it has to be a hub motor try to use a smaller wheel to put it in. A 24" or even better a 20" would be great for better torque.
by SlowCo
Apr 04, 2018 7:50 am
Forum: E-Bike Technical
Topic: DB25 solderless, how glue?
Replies: 6
Views: 274

Re: DB25 solderless, how glue?

If you go to all that trouble why not just solder them... :wink:
by SlowCo
Apr 04, 2018 7:44 am
Forum: Motor Technology
Topic: Any sealed/waterproof scooter motors?
Replies: 13
Views: 344

Re: Any sealed/waterproof scooter motors?

Is it possible to mount the motors high enough so they stay above the water and run chains to the wheels?
by SlowCo
Apr 04, 2018 7:24 am
Forum: E-Bike Technical
Topic: Definitive Tests on the Heating and Cooling of Hub Motors
Replies: 2040
Views: 275715

Re: Definitive Tests on the Heating and Cooling of Hub Motors

DasDouble wrote:
Apr 04, 2018 5:26 am
Has anyone tested yet if a fan mounted on the swingarm, pointing at the hubsinks is accellerating the cooling-down process decisive?
Yes, look at the post from Jestronix a little further down this page:
https://endless-sphere.com/forums/viewt ... start=1925
by SlowCo
Apr 03, 2018 1:04 pm
Forum: E-Bike General Discussion
Topic: Which hole size for tap?
Replies: 7
Views: 248

Re: Which hole size for tap?

Normal metric thread bolts are, as motomech wrote, M5x0,8mm and M8x1,25mm. If you need to tap the holes for these standard metric sizes you need to drill 4,2mm and 6,8mm holes indeed.
by SlowCo
Apr 03, 2018 9:25 am
Forum: Items for Sale - New
Topic: Narcine e-scooter
Replies: 7
Views: 315

Re: Narcine e-scooter

Looks nice and a bit like a chopper. An upgrade might be to have shocks instead of the rear struts under the seat for some suspension. Now there is no suspension so a harsh ride on rough roads. Is the price reasonable?