Mac hub motors speed on 14s lipo

[wannesd]

Hi,

on the cellman site, speeds are listed for 36V, but I run 14S lipo (58.8V hot)

What speeds could I expect to hit with the available winds?

Would like to top out at 30mph, wit sufficient torque to pull a child trailer if needed (obviously travelling much slower with children in it).

Thanks,
Wannes

 

[dogman dan]

Hard to say exactly, since I don't have a mac, and it would depend some on which winding you had.

For the "normal" speed windings, about 4 mph per 12v more is a good estimate for all hubmotors. A bit less for slow windings, a bit more for faster windings.

It gets affected some by the amperage too. You might see a bit more than 4 mph more if you are using a hot controller, vs something in a 20-25 amps range.

For example, a motor does 27mph on 48v 20 amps, 35 mph on 72v 20 amps, but hits 40 mph on 72v 40 amps. Add enough voltage, and the increase in watts needed to increase speed enough may not be enough if you don't also increase the amps.

 

[atom1025]

15s lipo to a mac10 yields 30mph on a 26"wheel. You'd want an 8t on 14s to hit 30.

 

[neptronix]

I know that 15S on a 8T in a 26" hits about 35-38mph, i know that 'fo sho.

You can see for yourself by using the ebikes.ca simulator.
the 10T MAC is equivalent to the 'BMC Torque', and the 8T is equivalent to the 'BMC Speed' motors.

http://ebikes.ca/simulator/

 

[wannesd]

Nice to know that I can use an equivalent in the simulator.

Do mac hubs come with torqueplates?

Also, will this hub play nicely with my lyen 12 fet?

 

[chroot]

Mac doesn't comes with the torque arms, you need make one or buy from one of reseller.

Like neptronix said check ebikes.ca simulator will tell you be exact speed just under custom selection and you supply
the volts, ampere and etc. 8)

 

[neptronix]

Nice to know that I can use an equivalent in the simulator.

Do mac hubs come with torqueplates?

Also, will this hub play nicely with my lyen 12 fet?

There was a generation of older lyen controllers that worked with MAC/BMC motors, but not smoothly.
I think he switched over to the newer style which works great, sometime around early 2012 or late 2011.

 

[dave.a]

My mac 8t on 24" rim, 14s lipo, does 33mph on flat level ground. Thats using a cellman 12fet controller on 40a.
Hope this helps
Dave

 

[wannesd]

Just ordered a wheel from cellman, mac 8T, in an alex rim. Hope it's tensioned good enough to use immediatly...

Thanks for the replies guys!

 

[atom1025]

Mine was not dished when it arrived and had a huge wobble. I was able to dish it myself and pull out the wobble.

 

[wineboyrider]

I know that 15S on a 8T in a 26" hits about 35-38mph, i know that 'fo sho.

You can see for yourself by using the ebikes.ca simulator.
the 10T MAC is equivalent to the 'BMC Torque', and the 8T is equivalent to the 'BMC Speed' motors.

http://ebikes.ca/simulator/

Yap, Dogman should know, because I was getting 35 plus on his 48v ping at the Deathrace.....

 

[wannesd]

Mine was not dished when it arrived and had a huge wobble. I was able to dish it myself and pull out the wobble.

Hope mine will be better...

 

[ions82]

I bought an 8T at the end of last year. I had to do a TINY bit of truing to the wheel before I mounted it. Nothing significant, though. I run a 12s3p lipo battery setup with Cell_Man's 9-FET 3077 controller. It's limited to around 25 amps, but my CA shows 32 or so when I'm into the throttle. At WOT (on flat ground), I get between 31-32 mph. I weigh about 155 pounds. Even after a few months, I am still blown away by how efficient and powerful this simple setup is. For a commuter-type bike, I can't imagine there is anything better than a MAC.