ES 1.0 Graveyard

Efficiency and weight. Mid Drive runs most efficiently across the speed range. Trouble with a Mid Drive is you lose half the gear range by losing the front triple ring. Nice thing about a trike is with chain tubes you really don't need a front derailleur to shift, and most aftermarket Mid Drives hav...

I happen to have a MAC 10T 26" rim + 10Spd Cassette with a Phaserunner, CA3, Thun Torque Sensing Hub sitting on a shelf that needs a new owner. It has about 1000 miles on it and is in great shape. Cabling is custom length for an HPV Scorpion FS26. I paid over $1000. $500. Send me a PM if intere...

The motor will operate as a generator with proper mods with clutch and motor driver software.
Its been done before but not very efficiently.

Not recommended as the different BMS's may have some oscillation between weaker/stronger cells.
Can leak smoke under extreme conditions.

Luna used to carry an SSR but I can't find it anymore. I have 3 of them. The first one blew when the 52V charger spiked > 60V once. Bought a second and they sent me two (warrantee). So at least I have a spare. Always disconnect battery ahead of SSR before charging; it seems that even very brief over...

Placing sensors as close to zero-cross as possible. It helps to have a timing light. I modified a spark timing light for that some years ago but not for bike motors....

Maximum amperage for a MAC...well I have been hitting mine with 60A battery and 180A phase for a couple years now without any problems i.e. no clutch problems and no gear problems. I really like the acceleration the MAC provides since it will accelerate faster than ANY ebike motor assuming you supp...

BB7 pads squeal depends on situation like ALL discbrake pads True although with the caveat that some are far worse than others. The OE BB7's were loud enough to get the attention of earbud shod pedestrians ahead; sometimes its even amusing in a cruel sort of way. EBM pads aren't always silent but t...

I'm not sure if I'm missing something in this thread, but had a similar issue recently with hard braking where the rear wheel locked up into a skid. It seems to have sheared some teeth because the wheel was locked up but the motor was still applying torque. I've been playing with MAC's for about 7 ...

BB7 has larger pads and pad position adjustors on both sides.

OE BB7 pads squeal, not sure about BB5.

Building a Wild One 20" with BBS02 and found this thread relevant to the lessons I'm learning at the moment. Had a Shimano XT 10 spd DER Med Cage on hand. Only handles a 36T max with 39T Chain Pull. Added an 11-40 10Spd Microshift AdvantX Cassette and Risk Extender. Reaches 48T just fine with 2...

Sort of but you're all missing the key points. Efficiency. At zero RPM the efficiency is zero. Its just a heater at that point. As motion begins, efficiency increases from zero. Think in terms of the frequency of shifting poles as the motor rotates. Once a more efficient frequency is reached the mot...

If you wanted a Adult 20" Trike. You lived in a relatively flat terrain. You want a combo that will give you range of 20 to 30 miles. You do not want to go fast mainly ride on the sidewalks. You total weight is bike and rider about 230 lbs. Select a trike. HPV Gekko 20 is great rigid frame can...

For my larger e bikes, the swagman hitch mount rack was the thing. You could put the front wheel in the loop, then lift the heavy hub motor rear wheel in without lifting the whole bike. I built longtails just a bit shorter than most cargo bikes just so they would still fit, and also fit a bus bike ...

Its a nice layout with proven results.

Monoshock is similar to one I'm modeling for a tilting scorpion without the ARB Gizmo.

Recumbent battery mounts always take a bit of creativity, nice job.

Does UL even certify batteries? Does every phone, laptop or any other device with a lithium battery sold in US have a UL certification? Ergo, UL/CE certs are optional, not required to sell by law. Insurance Companies drive the requirements as you eluded to. Yes, UL has Test Standards along with a f...

Try ordering directly. May take a bank transfer for payment.

http://www.macmotortech.com/

I'd expect the Gmac to burn out pretty fast on a 40A Grinfineon because it's too powerful. A 1 kilowatt motor on a 1.5 kilowatt controller going uphill will get hot after 5 minutes of tarmac mountain climbing and 1 minute of rocky path climbing. The grinfineon's are very efficient and quality signa...

Sorry to hear about the spindle failure. Heard that KMX was scarce but thats about all I know. They sure aren't getting any cheaper, just saw new Ti-Fly 20, Rohloff, Shimano Mid Drive, decked out, MSRP $15K. Zack Kaplan Cycles in case you just won the lottery. Too slow, but it's amazing folks will p...

Do you have a link to more information on it? This is one of them from 5 years ago; it's been updated with a Wolf Battery and relocation of components since. At 5000 miles did a motor teardown. Replaced clutch & gears since I had spares but they were still had at least another 5000 miles left o...

Recently graduated to the Speedgeezer Class, an old man with an E-Trike...... Been tweaking the trike(s), Scorpion FS26 with various drives for 6 years now. Started with Catrikes, but found they weren't getting any awards with velocity and bumps and upgraded to HPV. Test rode Stein, ICE, trikes to c...

All axle can be fitted to the front but you won't like it after a while. It will take some minor fab work. Brakes will put a lot more stress on the suspension than motors will FWIW. Unsprung weight and steering feedback on the front will be annoying to say the least. MAC/GMAC motors are superb when ...

Parker wrote: ↑

Dec 18 2021 4:59am

It's interesting that a legal ebike has to cut off power at 20 mph but a car has no restriction on its power over the legal speed limit

Cars don't drive on Multi-Use Pathways.

Looks like a fun project. I'll be watching.