Search found 425 matches

by The Toecutter
May 24 2020 12:32pm
Forum: E-Bike Technical
Topic: Lightest DOT compliant 16" moped wheels?
Replies: 9
Views: 350

Re: Lightest DOT compliant 16" moped wheels?

Nice! How much does the entire wheel weigh in at, tire, hub motor, spokes, all included? What make/model of hubmotor are you using? This will allow me to get an idea of how much weight I will need to devote to three wheels since the vehicle I am designing requires three wheels! One motor for the rea...
by The Toecutter
May 22 2020 10:21pm
Forum: E-Bike Technical
Topic: Lightest DOT compliant 16" moped wheels?
Replies: 9
Views: 350

Re: Lightest DOT compliant 16" moped wheels?

I came finally across a 16" rim that had its weight listed(I've found it is rare for these figures to be listed): https://www.mopeddivision.com/part-type/wheels-tires-brakes/wheels/universal-moped-rim-36-spoke-16-inch-black-semi-gloss-1-5/ Universal Moped Rim - 36 Spoke 16 Inch - Black Semi-Gloss - ...
by The Toecutter
May 17 2020 1:55pm
Forum: E-Bike General Discussion
Topic: Critique this performance velomobile idea
Replies: 196
Views: 31639

Re: Critique this performance velomobile idea

Indeed. Not just that, but that also means more rotational inertia to overcome, increasing the total energy requirement to build up speed, which can become a major problem when it is being operated under pedal-only mode. I need it to be easier than a normal upright bike to pedal on flat ground, even...
by The Toecutter
May 17 2020 12:41pm
Forum: E-Bike General Discussion
Topic: Critique this performance velomobile idea
Replies: 196
Views: 31639

Re: Critique this performance velomobile idea

The tail is now installed. Here's a pic of me riding it while wearing my plague doctor mask(to commemorate The Plague Year. Happy Plague Year everyone!): https://i.imgur.com/yeS6eGM.jpg It is stable and tracks straight while going downhill at over 50 mph. Still unmotorized. I have a lot left to do t...
by The Toecutter
May 17 2020 12:29pm
Forum: Large EV General Discussion
Topic: Introducing The Minion
Replies: 1
Views: 164

Introducing The Minion

A friend and I over the last two years had been working on a custom build at his shop. I designed an aluminum body for my custom-built KMX-framed velomobile until I came to the conclusion that it was going to be too heavy for my application. We decided to build a car off of my design. Semi-recent ph...
by The Toecutter
May 17 2020 12:10pm
Forum: E-Bike Technical
Topic: Lightest DOT compliant 16" moped wheels?
Replies: 9
Views: 350

Lightest DOT compliant 16" moped wheels?

I know there are builders here who have laced hub motors to 16" moped wheels, and that the diameter is almost a perfect match for 20" bicycle wheels, and that motorcycle tires to fit 16" moto rims and 20" bicycle tires to fit 20" bicycle rims are usually interchangeable when it comes to size. That s...
by The Toecutter
May 11 2020 11:38am
Forum: E-Bike General Discussion
Topic: Critique this performance velomobile idea
Replies: 196
Views: 31639

Re: Critique this performance velomobile idea

Interesting! It doesn't look significantly different from the photos, apart from the extra chine on top. The first shell didn't properly conform to the airfoils I used as templates because the shapes didn't provide clearance for pedaling. I had to elongate the front. This in turn meant that the rea...
by The Toecutter
Apr 23 2020 12:31am
Forum: E-Bike General Discussion
Topic: Critique this performance velomobile idea
Replies: 196
Views: 31639

Re: Critique this performance velomobile idea

The cells are all good. I got the cases mostly apart(I need a 2 inch deep T8 bit to get 3 more screws that were too deep, and cracked the case open), and both read 33.3V. All cell groups(4 parallel) read the same 2.8V. Each pack is 12S4P, 9.2AH. I will still need to take these packs apart and build ...
by The Toecutter
Apr 23 2020 12:17am
Forum: Items for Sale - New
Topic: Heavy Duty Torque Arm - Disc mount, clamping optional $35
Replies: 107
Views: 20716

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

I am interested in possibly ordering one of these for my KMX converted into a velomobile. How many miles have you been able to get on your KMX using this torque arm thus far? I am considering the possibility of running a Leafbike 5T wind motor with a Phaserunner set to 96A phase current PLUS pedal o...
by The Toecutter
Apr 19 2020 12:07am
Forum: E-Bike General Discussion
Topic: Critique this performance velomobile idea
Replies: 196
Views: 31639

Re: Critique this performance velomobile idea

My batteries arrived today. I need to get a T8 security bit to open the case so I can check the voltage of each cell. My charger is on the way and should arrive early next week. I'm still waiting on the Phaserunner controller. Due to the pandemic, the supply line from China has been disrupted. I do ...
by The Toecutter
Apr 14 2020 6:27pm
Forum: E-Bike General Discussion
Topic: Critique this performance velomobile idea
Replies: 196
Views: 31639

Re: Critique this performance velomobile idea

I found a really sweet deal on some A123 ANR26650M1-B LiFePO4 cells, already assembled into 12S4P packs of 36V nominal and 10AH. They were lightly used in a hospital setting and cost only $49.99 each. They include a battery management system that supposedly works. If worst comes to worst, I'll have ...
by The Toecutter
Apr 13 2020 4:18am
Forum: E-Bike Build Threads / Photos & Video
Topic: Lightweight efficiency oriented BikeE conversion
Replies: 48
Views: 5356

Re: Lightweight efficiency oriented BikeE conversion

Glad to see you're able to ride after such an injury. The bike does present itself quite a number of obstacles to electrification, as well as lots of potential configurations, none of them really ideal. The small wheels really impair it, IMO. I wouldn't trust the layout with a high-powered setup and...
by The Toecutter
Mar 26 2020 2:06pm
Forum: E-Bike General Discussion
Topic: Critique this performance velomobile idea
Replies: 196
Views: 31639

Re: Critique this performance velomobile idea

You chose Sempu because it's supposed to be the most responsive? I chose it because of spindle width. My current bottom bracket that my Suntour XCT Jr. crankset fits to is 117mm, and 115mm was the closest size I could find for an available torque sensing bottom bracket. 120mm would have been too wi...
by The Toecutter
Mar 23 2020 9:00pm
Forum: E-Bike General Discussion
Topic: Critique this performance velomobile idea
Replies: 196
Views: 31639

Re: Critique this performance velomobile idea

I got the basic pieces of the new body shell mounted last week. https://i.imgur.com/Qksrriu.jpg https://i.imgur.com/0FH6s8N.jpg https://i.imgur.com/dHxUa4c.jpg https://i.imgur.com/i52T3ND.jpg I still need to mount the tail, turtledeck, hood, windscreen, roof, rear wheel cowling, fenders, suspension ...
by The Toecutter
Mar 15 2020 10:37pm
Forum: E-Bike Technical
Topic: Question regarding torque sensor use with Cycle analyst
Replies: 6
Views: 271

Re: Question regarding torque sensor use with Cycle analyst

I got to it before I even read your post! According to the chart, if I have a 74V pack, my Cycle Analyst's maximum accessory current is 13.4 mA. Actually, it will be lower than that, since coming off of a full charge, the pack is likely to be closer to 85V, which would suggest 10 mA. My torque senso...
by The Toecutter
Mar 15 2020 10:18pm
Forum: E-Bike Technical
Topic: Question regarding torque sensor use with Cycle analyst
Replies: 6
Views: 271

Re: Question regarding torque sensor use with Cycle analyst

Use a suitable buck converter or a separate tiny battery to deliver a safely lower voltage. The Cycle Analyst has a connector with 5 input pins, 10V, Gnd, Dir, RPM, and Trq. I'm guessing then that I would take the connector on the Cycle Analyst side, connect it to a similar connector that has a wir...
by The Toecutter
Mar 15 2020 9:51pm
Forum: E-Bike Technical
Topic: Question regarding torque sensor use with Cycle analyst
Replies: 6
Views: 271

Question regarding torque sensor use with Cycle analyst

My Cycle Analyst V3.1 arrived. I read the user manual and on Page 34 it mentioned the following: "4. Using a torque sensor on a high voltage system: Even though the CA on its own can handle up to 150V, this voltage needs to be derated when accessories are plugged in which draw significant current. M...
by The Toecutter
Mar 06 2020 12:14am
Forum: Motor Technology
Topic: Leaf / leafmotor / leafbike high efficiency 1500w motor
Replies: 1589
Views: 223807

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

The direct drive hub world is in a sad state of affairs today. Indeed. If I had the equipment, I'd love to give making a really well-designed one a shot... Thinking of something like a Leafbike motor, but with 0.2 mm laminations, and less mass, perhaps around 7-10 lbs. With the right design, I thin...
by The Toecutter
Mar 04 2020 1:08pm
Forum: Motor Technology
Topic: Leaf / leafmotor / leafbike high efficiency 1500w motor
Replies: 1589
Views: 223807

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

do you need regen braking, or reverse? if not, you could use the hubmotor outside the wheel, in the drivetrain (like rassy did, or one of the various other versions), or separately chained to the wheel (so not in the pedal drivetrain), and have a freewheel (or clutch) between the motor and the whee...
by The Toecutter
Mar 03 2020 5:14pm
Forum: Motor Technology
Topic: Leaf / leafmotor / leafbike high efficiency 1500w motor
Replies: 1589
Views: 223807

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

I doubt you'll find it.. but i've pedaled home a few times w/o motor and can say in a 26" - 700C wheel, and super low friction Schwalbe Almotions, and can say i made the trip 3 miles home without dying.. :lol: My concern is that it may slow it down enough to negate the advantage of the body shell w...
by The Toecutter
Mar 02 2020 11:42pm
Forum: Motor Technology
Topic: Leaf / leafmotor / leafbike high efficiency 1500w motor
Replies: 1589
Views: 223807

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

A 7-speed freewheel is sometimes a tight fit, depending on the frame, but I'm told the 6-speed mega range fits easily, and still works with 7-speed derailleur. I have 135mm dropouts. The salesperson at Leafbike told me a 7-speed cassette would fit, after I told them I planned to go with 9 speed. Gl...
by The Toecutter
Mar 01 2020 5:16pm
Forum: Motor Technology
Topic: Leaf / leafmotor / leafbike high efficiency 1500w motor
Replies: 1589
Views: 223807

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

Because of the coronavirus, my motor wasn't able to be built. They offered to send me a 4T wind 1500W version instead, 3mm phase wires pre-installed, no extra charge, and I took it. It arrived last Wednesday, and I was advised not to open the box for 2 weeks. I'll open the box when the 2 weeks has p...
by The Toecutter
Feb 11 2020 11:43pm
Forum: E-Bike Build Threads / Photos & Video
Topic: Custom KMX recumbent trike with QS205
Replies: 105
Views: 9410

Re: Custom KMX recumbent trike with QS205

tonystark20 wrote:
Feb 10 2020 3:00pm
ASI BAC4000
How much does this controller weigh?

It can put out enough watts to power a car...
by The Toecutter
Feb 08 2020 8:35pm
Forum: Motor Technology
Topic: Leaf / leafmotor / leafbike high efficiency 1500w motor
Replies: 1589
Views: 223807

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

I got a notification a bit over a week ago that my motor would have to be built. This gave me a chance to specify 3mm phase wires, with the consequence being that the protective spring could not be fit to cover the insulation of the wires bundled together through the center of the case. The motor ha...
by The Toecutter
Jan 26 2020 6:28pm
Forum: Motor Technology
Topic: Leaf / leafmotor / leafbike high efficiency 1500w motor
Replies: 1589
Views: 223807

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

Thank you for sharing that link. It will come in handy soon. Also, does anyone have figures for the hysteresis drag torque and eddy current drag torque for the Leafbike motors? I could not find these figures published anywhere, but it would be nice to calculate how much wattage I'll need to overcome...