Magic Pie III wanted with slower winding.

[AussieCruzer]

Hi,

I have a 500 watt motor on my two wheeled recumbent which was okay for most of the hills I encountered locally but is now very hard going up some of the steeper hills with my recently fitted dog trailer with just my smallest dog on board. I am keen on buying a 1000w Magic Pie III with more torque so I can put both my dogs in the trailer!

I am retired and only ride for recreational exercise. I have no interested in high speed but I would like more power assist up the steeper hills I encounter so a motor with a low speed winding would be ideal for me with the more efficient zone happening at a lower speed.

I read that a low speed version of the Magic Pie II was available for the European market on account of their 25kph e-bike speed limit, if a low speed Magic Pie III is available would it be possible for me to order one through one of the Australian dealers?

[e-lmer]

I think what you want is a smaller diameter wheel.
I believe what you have heard of is a standard pie with electronic limiting.

[AussieCruzer]

I think what you want is a smaller diameter wheel.
I believe what you have heard of is a standard pie with electronic limiting.

Thank you for your reply.

Yes a smaller diameter wheel would achieve this but would effect geometry of bike.

A reference to a European version Magic Pie by ”GoldenMotor” (October 2009) on Endless-sphere.com forum where “Hyenna” was mistakenly sent a low RPM Magic Pie II for testing:

HOW TO DISTINGUISH BETWEEN HIGH RPM AND EUROPEAN VERSION MAGIC PIE:
The HIGH rpm has FLATS on the axle
The low RPM high torque has NO flats on the axle.

Seventh post down: http://bit.ly/ypLL1L

Wouldn’t cargo haulers, very obese riders or dirt riders?? Choose a slower winding if it was available?

Would probably give better take off as they are better at pulling heavy loads at lower speeds than the standard windings.

Maybe the Magic Pie III with its 30% more torque negates the need for a European version?

[GM Canada]

I've never believed any of that. In the video both wheels have flats on the axles. The first test looks like the speed you would get at 48 volts, the second at 36 volts. Ive never seen Hyena confirm his axle was without flats. Its is not the word of Hyena I have doubt in. If you think about it why would either axle not have flats? An oval axle with flats would be stronger. Even if there was an axle that was round without flats it would be smaller and weaker and wouldnt you want the high torque one to be stronger?

What I can say for sure is no one will be disapointed with the low end torque of my MP3. Have you seen my MP3 Torque test? I was barely pushing the throttle and it climbed like a dream.

http://www.youtube.com/watch?v=S5RtYeUmW1U&list=UUv3KWOO85wyf-opGp2gn-yA&index=9&feature=plcp

Listen to how quite the motor is too. Its really quite remarkable.

Gary

[Leslie]

Im pretty sure the lower speed EU hubs would be limited by software design and not by windings.

Id take Garys word for it and just try out the MP3. :-P 

I have seen a power mod on these boards for the controllers.

I did plenty of weight with the old hubs with a more robust controller, but I blew the windings dragging a ton of shop home one night.  My hubby was burning up and stank like skank.

The MP can do more than the older hubs, and I have only felt the motor get luke warm with heavier loads..  Not even at 42 deg celcius ambient temperatures did the MP working hard concern me.  Where as the old hubs are a big worry pushed fast up hard hills towing considerable weight..

The MP gets rid of thermals phenominally in comparison to the HBS hubs and can demostrate whip lash torque on take off at currents over 30-40 amps with the newer or third party controller...

[AussieCruzer]

Gary, I to was puzzled by the high torque version as having no flats on its axle, it didn’t seem to make much sense. What I was querying was the specific mention of a European version Magic Pie as being Low RPM high torque.

Les, I assumed that the EU pie would have an electronically cut off at 25kph, just thought logically that for it to be described as high torque it would have to have a slower winding. Thanks for the feedback on the pie regarding load carrying, I liked your description of “whip lash torque on take off” I am sure my new Ping high BMS 48V 20AH battery will put out enough amps...

Anyway I have just purchased a Magic Pie III ...was lucky, found an Australian dealer who has a couple of Magic Pie 3’s arriving next week.

Great video Gary, I am sure my new pie will assist me and my two dogs up the hills okay.

Cheers, thank you for your replies

[Leslie]

Yes all pies have high torque.  A natural ability so to say.  Weelie popping dirt flinging awesomness.  It depends on your battery size or quality cells whether you should punish them this way, and the controller.