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by The Toecutter
Nov 12 2020 12:48am
Forum: EBike General Discussion
Topic: Fully 3D Printed DIY electric car
Replies: 57
Views: 2905

Re: Fully 3D Printed DIY electric car

Interesting project. What kind of frame is supposed to be underneath the body? If it is a plastic frame as well, I wouldn't trust the car to hold together going down a road. Hopefully there is some kind of metal chassis. Any target curb weight considered yet? How many hours do you expect it would ta...
by The Toecutter
Nov 11 2020 12:58pm
Forum: EBike General Discussion
Topic: Leaf / leafmotor / leafbike high efficiency 1500w motor
Replies: 2003
Views: 259458

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

No, it would take some work to make it accept a bike chain, and no it wouldn't fit 135mm dropouts. Actually, the better way to implement one in something like yours, would be to put it on the swingarm closer to the pivot and use bike chain with top and bottom chain tensioners for a silent drive. Re...
by The Toecutter
Nov 10 2020 10:00pm
Forum: EBike General Discussion
Topic: Leaf / leafmotor / leafbike high efficiency 1500w motor
Replies: 2003
Views: 259458

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

The MiniMonster would have been perfect for your velo. Do you have specs for this motor and what vehicles were produced with them so I can source one? Is it compatible with a bicycle freewheel or cassette and can it fit into 135mm dropouts, as that is necessary for my application. No not balsy, it ...
by The Toecutter
Nov 10 2020 9:52pm
Forum: EBike Build Threads
Topic: scorpion fx
Replies: 33
Views: 2814

Re: scorpion fx

Nice build! Do you have any future plans for it? What would this build turn into if you had unlimited resources? I bumped my battery to 17s and wanted to see how the motor handled the voltage. no problems with the motor at that voltage. I couldn't do a topspeed run, it was windy and my windshield wa...
by The Toecutter
Nov 10 2020 9:19pm
Forum: EBike General Discussion
Topic: Leaf / leafmotor / leafbike high efficiency 1500w motor
Replies: 2003
Views: 259458

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

It's for ride comfort, rolling efficiency, and traction on less than smooth surfaces. Makes sense. I wouldn't be able to go to a 20" bicycle wheel or 16" moto wheel in the rear without a rear suspension. An unsuspended rear with a 26" bicycle wheel is already a bit rough for me going...
by The Toecutter
Nov 10 2020 9:02pm
Forum: EBike General Discussion
Topic: Leaf / leafmotor / leafbike high efficiency 1500w motor
Replies: 2003
Views: 259458

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

For a bicycle application, the larger sized wheels make sense, if only to keep the rear derailleur as far off the ground as possible.
by The Toecutter
Nov 10 2020 8:27pm
Forum: EBike General Discussion
Topic: Leaf / leafmotor / leafbike high efficiency 1500w motor
Replies: 2003
Views: 259458

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

The sustained power for 65mph cruising may be a bit much for that motor, so I'd install a temp sensor. I've got a 10k NTC thermistor. Depending upon CdA and Crr, I may be able to do 65 mph only 1.5 kW. Not happening with the 5T wind though at 72V, but a 3T would have no problem. This thing is a lot...
by The Toecutter
Nov 10 2020 1:55pm
Forum: EBike General Discussion
Topic: Leaf / leafmotor / leafbike high efficiency 1500w motor
Replies: 2003
Views: 259458

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

I still want one.. :mrgreen: Get a trike with a suspension and build one around it. You won't regret it. That's the cheapest path towards having one, and can be done for under $2,000 with careful selection of trike and parts if you get a good deal on a used one, but if you're willing to forego susp...
by The Toecutter
Nov 10 2020 12:26pm
Forum: EBike General Discussion
Topic: Leaf / leafmotor / leafbike high efficiency 1500w motor
Replies: 2003
Views: 259458

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

When you have 40-45mph speed limits and no bike lanes.. and your bike can't hit that speed, the most unsafe thing you can do is become a traffic obstacle in a sea of cars. If you want a sneak peek of how dangerous this is, get on a 70mph highway during peak traffic and cruise along at say, 40mph an...
by The Toecutter
Nov 10 2020 11:24am
Forum: EBike General Discussion
Topic: Leaf / leafmotor / leafbike high efficiency 1500w motor
Replies: 2003
Views: 259458

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

Is it not easier to just buy a moped and glue peddles on it. Where is " Balmorhea", we need some balance. So how many here peddle at 30+ mph with a moped wheel? How many miles, i'm thinking sign up for tour de france. A moped with pedals on it would legally be defined as a moped, requirin...
by The Toecutter
Nov 09 2020 8:16pm
Forum: EBike General Discussion
Topic: Leaf / leafmotor / leafbike high efficiency 1500w motor
Replies: 2003
Views: 259458

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

Since they don't make a 2t version, the only wind I'd consider buying is a 3t, and with that I could build any low to moderate performance ebike that a customer wanted as long as they didn't want a 29er (which I'd refuse to build and would discourage 26" wheel builds, not because of the wind b...
by The Toecutter
Nov 07 2020 6:59pm
Forum: EBike General Discussion
Topic: Leaf / leafmotor / leafbike high efficiency 1500w motor
Replies: 2003
Views: 259458

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

11T has the same copper fill as 3T and 6T. For most applications, that would imply higher than 48 volts. I'm not sure whether 11T tolerates the 35 amps their default controller delivers. I'm sure they'd tell you if you ask, though. I didn't even know they made an 11T! That might pop wheelies...
by The Toecutter
Nov 07 2020 4:45pm
Forum: EBike General Discussion
Topic: Leaf / leafmotor / leafbike high efficiency 1500w motor
Replies: 2003
Views: 259458

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

So is this motor (highest power version) commonly available in 8T? What about it makes it "extreme?" I wouldn't describe it as "extreme", but an 8T wind will make more torque per amp than a 6T wind, BUT the continuous torque possible from an 8T will be less than either a 6T or 3...
by The Toecutter
Nov 06 2020 11:05pm
Forum: EBike General Discussion
Topic: Leaf / leafmotor / leafbike high efficiency 1500w motor
Replies: 2003
Views: 259458

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

Hey everyone! This motor looks sick! I want to get one for a 29er full suspension mountain bike. I will be riding it on some pretty good road hills, so I was thinking of asking for a 30mph top speed. Do you think it would run well off a 52v 40-AMP 14Ah battery? I am trying to get 40 miles off a cha...
by The Toecutter
Oct 30 2020 4:35pm
Forum: EBike Build Threads
Topic: E-S Stealth Electric Bike Owners
Replies: 17980
Views: 1965972

Re: E-S Stealth Electric Bike Owners

5: In the photo, you will notice a velomobile shell - we rotomould "Rotovelo" here - i'll be replacing my one with a new one soon and be getting electric assist - anyone want to suggest a hub motor system? Don't need high power due to the aero as you can easily get yourself into trouble.....
by The Toecutter
Oct 26 2020 8:05pm
Forum: Large EV General Discussion
Topic: 3.8Mw Electric hypercar
Replies: 18
Views: 1582

Re: 3.8Mw Electric hypercar

TTc’r...respect your personal experience, but how are you actually measuring your “peak torque” ? There is extensive data posted from NASA tests on the Prestolite MTC4001, and whilst they do not run it down to a full stall (?), the data clearly show the controller input current increasing with torq...
by The Toecutter
Oct 25 2020 12:52pm
Forum: Large EV General Discussion
Topic: 3.8Mw Electric hypercar
Replies: 18
Views: 1582

Re: 3.8Mw Electric hypercar

http://d2uwzav5gtex9t.cloudfront.net/oxfordimpactspdf/Electric_motors_fit_for_racing_cars.pdf Remember Lord Drayson? (Or whatever.) Stackable motors. https://www.yasa.com/yasa-p400/ Interesting. I've not come across this specific motor before, but have read of similar motors. Metric Mind used to se...
by The Toecutter
Oct 24 2020 11:32pm
Forum: Large EV General Discussion
Topic: 3.8Mw Electric hypercar
Replies: 18
Views: 1582

Re: 3.8Mw Electric hypercar

Full throttle actually means max torque. If the accelerator is all the way to the floor and the car is at or near stall, it isn't even at 1% of peak power. The RPM has to rise for power demand to rise. Simple mathematics can demonstrate this. For most of the time the car is at full throttle, it will...
by The Toecutter
Oct 24 2020 1:14pm
Forum: Large EV General Discussion
Topic: 3.8Mw Electric hypercar
Replies: 18
Views: 1582

Re: 3.8Mw Electric hypercar

Err no ? Even at its constant 488km/hr it would take 2.6 mins to run 20.8 km of Nurburgring equivalent straight road.. BUT at 3800kW, .. that 60 kWh pack only lasts < 1 minute !! :shock: I assume they have a bigger pack for their claimed 1000+ km range. !...( or maybe a tow truck & trailer :win...
by The Toecutter
Oct 22 2020 9:03am
Forum: EBike Build Threads
Topic: KMX Electric Trike
Replies: 13
Views: 1738

Re: KMX Electric Trike

You've kept it in pristine shape too. Mine's all scratched-up and beaten to hell since I put 10,000 mils a year on it, including in rain and snow and going offroad, and carry 50+ lbs of groceries in it. Do you use any protective coatings for the paint? What sort of use does it get(miles per day/year...
by The Toecutter
Oct 20 2020 11:50am
Forum: Large EV General Discussion
Topic: 3.8Mw Electric hypercar
Replies: 18
Views: 1582

Re: 3.8Mw Electric hypercar

Sure, some individual components are realistic, .. 160 kw motors are available, but how much does 6 of them weigh, and how does that work on each wheel ? Would be interesting if they showed us some specs. It would generally be more space/weight efficient to use one or two large motors instead of 24...
by The Toecutter
Oct 19 2020 7:31pm
Forum: Large EV General Discussion
Topic: 3.8Mw Electric hypercar
Replies: 18
Views: 1582

Re: 3.8Mw Electric hypercar

Doesnt it use 24 motors ?.....6 on each wheel. That would “only” need 160kW per motor! :roll: And the 60kWh pack would “only” need to be 65C capable,....just for a minute or so ! 24 motors would be a strange design. I'd like to see the specs of them, assuming they even exist. I don't think they'd p...
by The Toecutter
Oct 18 2020 1:49pm
Forum: Large EV General Discussion
Topic: 3.8Mw Electric hypercar
Replies: 18
Views: 1582

Re: 3.8Mw Electric hypercar

It's plausible. The 5AH LoneStar cell can do 500A continuous with a weight of 0.13 kg, 3.7V nominal, 0.0008 Ohms resistance. A 3,840 kW capable pack would have a battery weight of 302 kg using these cells, not including BMS/cooling/housing/ect. The motors and controllers are going to be some real mo...
by The Toecutter
Oct 04 2020 12:42pm
Forum: Items for Sale - Used
Topic: 70$ Li-Ion Battery Pack 48V 10.5Ah 500w output
Replies: 71
Views: 5597

Re: 70$ Li-Ion Battery Pack 48V 10.5Ah 500w output

Thank you for sharing this.

Now, do these already have Anderson connectors built in, or do I have to solder some wires on the terminals and add some?

This would make a great starter battery just to get something going on the cheap.
by The Toecutter
Sep 30 2020 9:42pm
Forum: Items for Sale - New
Topic: Heavy Duty Torque Arm - Disc mount, clamping optional $35
Replies: 113
Views: 24328

Re: Heavy Duty Torque Arm - Disc mount, clamping optional $35

What size and length of Allen-head bolts are used for this? I want to make sure I have the parts lined up when I install this with my motor/controller/battery pack. A Grin torque arm will complement it on the cassette side. I hope it holds up to what may be around 120 Nm torque for both motor and pe...