GoldenMotor.com Forum
General Category => Magic Pie & Smart Pie Discussions => Topic started by: GoldenMotor on January 02, 2010, 02:56:30 AM
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You can get a two horse power bike with dual MagicPie wheel. The conversion is easy with built-in controller. Use single throttle to command two motors.
(http://www.goldenmotor.com/JDbike/MP-DualDrive.jpg)
Link: http://www.goldenmotor.com/JDbike/MP-DualDrive.jpg
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Dirt MTB is awesome.
As a thought!
2 of those 48v 20ah lifepo pack and feed that yummy torque using two controllers.
I was just thinking of this set up with 2 GM mini motors @36v on 24" wheels.
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any specs?
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Im guessing the specs are 2 MPs each have their own controller 750 watts on both hubs using a single throttle wired to each controller in parallel.
Double the possible NM and torque, less efficiency but because the hubs are not pushing it, the loss efficiency for the gains IMO are acceptable for such an awesome off roader.
I assume because of two motors you could use 2 X 20ah packs and the extra weight from an energy storage point of view is not such a big ask.
This bike with two motors and 2X20ah Lifpo4 batteries would still weigh less than my 48v 24ah SLA bike with a single HBS motor and should be able to go further distance and have 3 times the power.
Its top speed should be a few kph over that of a single motor.
The amount of heat put out per motor would be very low giving back some efficiency especially when doing high load work outs.
On a sturdy frame the weight distribution should be nicely balanced. Put one battery on the frame triangle and another on a rear rack, Hell try put both batts in the frame triangle.
Some thick slicks should hold up on fast corners.
2 wheel drive for maximum traction going up lose rocky gritty grades.
You could almost name your grade and she gets up on it with little drama.
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OMG, I need this bike ;D
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You can get a two horse power bike with dual MagicPie wheel. The conversion is easy with built-in controller. Use single throttle to command two motors.
(http://www.arhservices.co.uk/GoldenMotor/2MPChop.JPG)
I just need a 20" front wheel to help it up really steep hills.
Alan
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(http://www.arhservices.co.uk/GoldenMotor/2MPChop.JPG)
Sick
But wouldn't it be better for a 20" hill climb hub be used on the rear wheel. Those forks don't look like they have good hill climbing ability stamped on them.
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Those forks don't look like they have good hill climbing ability stamped on them.
Hill climbing ability was not taken into consideration when I modified them. The forks were extended to give a more relaxed and comfortable riding position, and at the same time make it look a bit like my old Fantic Chopper moped.
(http://www.arhservices.co.uk/GoldenMotor/Bikes/Fantic1978.JPG) (http://www.arhservices.co.uk/GoldenMotor/2MPChop.JPG)
I'm currently making an LED headlamp from an old speaker housing which should go nicely with the forks.
I'll hopefully post some pictures at a later date so you'll be able to see what I mean.
Alan
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top speed on 48v fully charged?
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I'll tell you what. The top speed on my dual drive 24v/250w motors with 36v (LiFePo4) batteries on a 24 inch front / 20 inch rear is 32 mph with a current draw of a total of 19amps between both batteries...
If I changed the motors to 36v / 500w I'm sure I could do 40mph easily.
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weird you have 2 different sizes of wheels and 2 motors, isn't then one motor doing much more than the other or so,
32mph is nice very nice
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weird you have 2 different sizes of wheels and 2 motors, isn't then one motor doing much more than the other or so,
32mph is nice very nice
Yes, my front 24" motor is 8 amp usage and rear 20" motor is 11 amp usage.
Now realize that's max speed and I Wouldnt suggest running 24v motors at 36v at max amperage and speed for any length of time.
My AVERAGE speed is approx 24 mph at what I would consider max safe amperage of 5.5 amp for front and 6.5 amp for back.