Search found 515 matches

by Bullfrog
Apr 29 2022 4:33pm
Forum: EBike Build Threads
Topic: High performance & durability Cannondale Semi Recumbent
Replies: 370
Views: 43240

Re: High performance & durability Cannondale Semi Recumbent

An update for those wondering why one the bigger builders on this forum is not a builder anymore.. My $250/month small dark dusty warehouse corner with no air conditioning or protection from pollution's effects on me turned out to be the deal of a lifetime compared to what's out there now, which i ...
by Bullfrog
Apr 05 2022 9:34pm
Forum: EBike Build Threads
Topic: High performance & durability Cannondale Semi Recumbent
Replies: 370
Views: 43240

Re: High performance & durability Cannondale Semi Recumbent

"The best kind of fast bike is one that doesn't look like one"...very true :wink: . You want to fly under the radar and not get stopped like I did. APL...last time I checked, HPC would not sell just the frame and I have not found another one like the one you have pictured. If there is anot...
by Bullfrog
Apr 05 2022 10:38am
Forum: EBike Build Threads
Topic: High performance & durability Cannondale Semi Recumbent
Replies: 370
Views: 43240

Re: High performance & durability Cannondale Semi Recumbent

Nep...do you want a rear suspension? Nothing you don't know...but a rear suspension is nice from the comfortable ride perspective but it can complicate things a little bit with more movement for the wiring going to the motor and the weight of the motor being "unsprung"...the Shengyi would ...
by Bullfrog
Apr 05 2022 7:52am
Forum: EBike Build Threads
Topic: High performance & durability Cannondale Semi Recumbent
Replies: 370
Views: 43240

Re: High performance & durability Cannondale Semi Recumbent

Neppie...I recently bought a Schwinn Axum from Walmart. Aluminum frame and 29" wheels. I got the "Large" frame for two reasons...enough leg room and enough room in the forward triangle for a decent sized battery. And yes it does come in different size frames from Walmart :thumb: . I i...
by Bullfrog
Mar 15 2022 10:52am
Forum: EBike General Discussion
Topic: Leaf / leafmotor / leafbike high efficiency 1500w motor
Replies: 2418
Views: 289512

Re: Leaf / leafmotor / leafbike high efficiency 1500w motor

That's a top shelf rim, appropriate gauge spokes, good choice of hub motor... all the right ingredients, I think. As long as it's good and tight, it should give you reliable service. Well done. How much power do you intend to stuff into it? And how did you put in the Statorade? Thanks :) yes.. spok...
by Bullfrog
Mar 15 2022 10:08am
Forum: EBike General Discussion
Topic: Leaf / leafmotor / leafbike high efficiency 1500w motor
Replies: 2418
Views: 289512

Re: Leaf / leafmotor / leafbike high efficiency 1500w motor

https://i.imgur.com/U6CaMcY.jpg Got my wheel finished That's a top shelf rim, appropriate gauge spokes, good choice of hub motor... all the right ingredients, I think. As long as it's good and tight, it should give you reliable service. Well done. How much power do you intend to stuff into it? And ...
by Bullfrog
Mar 12 2022 9:14pm
Forum: EBike General Discussion
Topic: Leaf / leafmotor / leafbike high efficiency 1500w motor
Replies: 2418
Views: 289512

Re: Leaf / leafmotor / leafbike high efficiency 1500w motor

do as you wish, but...there are 3-speed throttle switches. They are simply resistors of different values to alter the 5V throttle signal to the controller. Thanks spinningmagnets...that is a good tip for anyone :thumb: . I have one on my bike with a 10T MAC and I really do use it and it is usually ...
by Bullfrog
Mar 12 2022 12:30pm
Forum: EBike General Discussion
Topic: Leaf / leafmotor / leafbike high efficiency 1500w motor
Replies: 2418
Views: 289512

Re: Leaf / leafmotor / leafbike high efficiency 1500w motor

I suppose different riders have different user-profiles. I only use high amps for a short acceleration phase, and then I cruise at a lower speed than my max possible. While I'm cruising along, I use fairly low amps. My problem is my right wrist MUST turn the throttle as far as possible as often as ...
by Bullfrog
Mar 10 2022 1:40pm
Forum: EBike General Discussion
Topic: Leaf / leafmotor / leafbike high efficiency 1500w motor
Replies: 2418
Views: 289512

Re: Leaf / leafmotor / leafbike high efficiency 1500w motor

What frame is this motor on? Did you pre-service aka grease the bearing? No. It is a ester base low temperature / wide temperature grease, in the bearing I paid for. This means it works form 0*C to 100*C. You can get the bearings pre packed with about five different lubricants. Here is my build thr...
by Bullfrog
Mar 08 2022 5:02pm
Forum: EBike General Discussion
Topic: Leaf / leafmotor / leafbike high efficiency 1500w motor
Replies: 2418
Views: 289512

Re: Leaf / leafmotor / leafbike high efficiency 1500w motor

Thats a very good way of wording the super myth on hub motors. I have only seen 40a and 50a maximum current bms' from the usual reliable builders, 60a would be nice ;) One thing I would like to clear up for myself after reading the articles link was a hint that its just amps is it the current (a) o...
by Bullfrog
Mar 08 2022 9:52am
Forum: EBike General Discussion
Topic: Leaf / leafmotor / leafbike high efficiency 1500w motor
Replies: 2418
Views: 289512

Re: Leaf / leafmotor / leafbike high efficiency 1500w motor

Thanks to everyone here for sharing the pics and data. https://www.electricbike.com/leafbike-1500w-hubmotor-the-mid-sized-hot-rod/ Spinningmagnets has a very good and informative article on the Leaf Motor and he included a lot of stuff that is applicable to not only the Leaf motor but any electric ...
by Bullfrog
Feb 23 2022 9:10am
Forum: EBike Non-hub Motor Drives
Topic: Best Mid-drive Motors in 2021
Replies: 90
Views: 9070

Re: Best Mid-drive Motors in 2021

Bullfrog, we're primarily looking to sell these motors on our own bikes, many of which are built on compatible frames. Selling motors for DIY is a bonus opportunity for adoption, which I'm expecting will lead to even more variety in applications :D I did not mean to come across as negative in any w...
by Bullfrog
Feb 22 2022 8:55am
Forum: EBike Non-hub Motor Drives
Topic: Best Mid-drive Motors in 2021
Replies: 90
Views: 9070

Re: Best Mid-drive Motors in 2021

Just a suggestion, design and offer a separate motor that will mount similarly to the BBSHD as well as the one you have...that will should cover just about every bike frame made today. Unfortunately, not every bike frame will ever be compatible with this type of drive system. 157mm is the narrowest...
by Bullfrog
Feb 21 2022 12:12pm
Forum: EBike Non-hub Motor Drives
Topic: Best Mid-drive Motors in 2021
Replies: 90
Views: 9070

Re: Best Mid-drive Motors in 2021

Bullfrog, The ESC (motor controller) will actually take 72V Nominal (~90VDC) and up to 90A, but we have never tested the system that high due to our preference for commercially-available battery packs. Most likely the motor will burn out at those power levels anyway :) 50A is about what our pack BM...
by Bullfrog
Feb 20 2022 11:27am
Forum: EBike Non-hub Motor Drives
Topic: Best Mid-drive Motors in 2021
Replies: 90
Views: 9070

Re: Best Mid-drive Motors in 2021

Mid drive, up to 60V, 50A, over 300 Nm torque at the rear wheel, tougher than anything I've ever ridden. We have tried to destroy these bikes and nothing will break (besides some early electronics iterations, usually from R&D guys wiring things up weird, the engineers did nothing wrong!) Thanks...
by Bullfrog
Feb 20 2022 10:22am
Forum: EBike Non-hub Motor Drives
Topic: Best Mid-drive Motors in 2021
Replies: 90
Views: 9070

Re: Best Mid-drive Motors in 2021

Deafcat wrote:
Feb 18 2022 10:50pm
last one was kinda shit, here... Four Days now, really:

Happy weekend! Cheers,
So Tuesday the 22nd of Feb is the big reveal day :shock: .

Can you tell us anything at this point...i.e. mid drive, hub, geared hub? Allowable battery voltage? etc.?
by Bullfrog
Feb 01 2022 6:52pm
Forum: EBike General Discussion
Topic: Leaf / leafmotor / leafbike high efficiency 1500w motor
Replies: 2418
Views: 289512

Re: Leaf / leafmotor / leafbike high efficiency 1500w motor

Hard to say exactly what caused the RH212 to fail like that, but yeah it's pretty bizarre and not something I've ever encountered before either. There were not any obvious external factors and the point it failed wasn't a particularly hard bump, having hit far larger one's prior without issue. I wa...
by Bullfrog
Feb 01 2022 4:41pm
Forum: EBike General Discussion
Topic: Leaf / leafmotor / leafbike high efficiency 1500w motor
Replies: 2418
Views: 289512

Re: Leaf / leafmotor / leafbike high efficiency 1500w motor

Justin at Grin Tech was the one that told me about running a MAC at 150C without any degradation on his dyno. I later checked and although I can't remember what magnets the MAC uses, 150C was not supposed to degrade them any. I don't roll the power back at 150C, I actually kill the power completely ...
by Bullfrog
Feb 01 2022 11:08am
Forum: EBike General Discussion
Topic: Leaf / leafmotor / leafbike high efficiency 1500w motor
Replies: 2418
Views: 289512

Re: Leaf / leafmotor / leafbike high efficiency 1500w motor

One could argue your not a true hobbyist until you have 2 digital multimeters and cooked 1 motor. I have one multimeter and have cooked about 6 motors so what does that make me :P My latest was a RH212...shoulda bought a Leaf motor! https://endless-sphere.com/forums/download/file.php?id=310260 http...
by Bullfrog
Dec 24 2021 2:03pm
Forum: EBike General Discussion
Topic: Leaf / leafmotor / leafbike high efficiency 1500w motor
Replies: 2418
Views: 289512

Re: Leaf / leafmotor / leafbike high efficiency 1500w motor

Possibly going back to the saturation discussion; I noticed that the more current is available to the motor, the "knee", for lack of the correct term, in the torque curve moves up and toward lower speeds/rpms; and at some point the torque curve become completely smooth; at 325 battery amp...
by Bullfrog
Dec 22 2021 7:00pm
Forum: EBike General Discussion
Topic: Leaf / leafmotor / leafbike high efficiency 1500w motor
Replies: 2418
Views: 289512

Re: Leaf / leafmotor / leafbike high efficiency 1500w motor

Below is an explanation of Magnetic Saturation and its effects from one of the guys on the Endless Sphere forum that I respect a lot: " The saturation point only depends on the iron properties and the amp-turns of copper. Making the laminations thinner won't change the saturation point but wil...
by Bullfrog
Dec 22 2021 12:40pm
Forum: EBike Non-hub Motor Drives
Topic: Which gear in a 3 speed hub is strongest?
Replies: 47
Views: 6773

Re: Which gear in a 3 speed hub is strongest?

Yes I know this is an old thread but I need a little help. Trying to determine the relative backlash in a Sturmey Archer CS-RK3 hub...can someone roll their bike forwards while holding the chain, if it moves, and tell me the number of clicks in one revolution of the rear wheel? I believe it is aroun...
by Bullfrog
Dec 21 2021 1:15pm
Forum: EBike General Discussion
Topic: Leaf / leafmotor / leafbike high efficiency 1500w motor
Replies: 2418
Views: 289512

Re: Leaf / leafmotor / leafbike high efficiency 1500w motor

Below is an explanation of Magnetic Saturation and its effects from one of the guys on the Endless Sphere forum that I respect a lot: "The saturation point only depends on the iron properties and the amp-turns of copper. Making the laminations thinner won't change the saturation point but will ...
by Bullfrog
Dec 20 2021 1:43pm
Forum: EBike General Discussion
Topic: Leaf / leafmotor / leafbike high efficiency 1500w motor
Replies: 2418
Views: 289512

Re: Leaf / leafmotor / leafbike high efficiency 1500w motor

Regarding magnetic saturation.... My limited understanding is that....When Magnetic Saturation occurs, it is a function of the material used for the poles i.e. the piece that the stator coils wrap around. And it is nothing more than the magnetic strength of the poles is no longer linear with regard ...
by Bullfrog
Dec 20 2021 1:32pm
Forum: EBike General Discussion
Topic: Leaf / leafmotor / leafbike high efficiency 1500w motor
Replies: 2418
Views: 289512

Re: Leaf / leafmotor / leafbike high efficiency 1500w motor

Here is what I get with Leaf bike 1500 Kv set at 9.6: https://ebikes.ca/tools/simulator.html?bopen=true&motor=9C212_6T&batt=cust_72_0.00001_40&cont=cust_80_250_0.00001_V&hp=0&cont_b=cust_80_250_0.00001_V&motor_b=Leaf%205T&batt_b=cust_72_0.00001_40&hp_b=0&kv_b=9.6...