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Author Topic: How is GM Pie-3 on hills (climbing on)?  (Read 16312 times)

Offline Just

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How is GM Pie-3 on hills (climbing on)?
« on: February 24, 2013, 07:20:44 PM »
Hi All,

How is the GM Pie-3 on hills (climbing on)? Will it take 35% slip for 100m? Any other examples?

Thank you!
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Offline Bikemad

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Re: How is GM Pie-3 on hills (climbing on)?
« Reply #1 on: February 24, 2013, 11:15:36 PM »
Are you having a laugh Dmitryl, do you actually realise how steep a 35% gradient is?

Here's a picture that clearly demonstrates what a 35% hill really looks like:


                 

A bike equipped with dual MPIIIs (and with the batteries ideally located over the front wheel) might be able to tackle it, but I wouldn't expect a single MPIII with a standard controller to be able to climb this much of a slope, not unless it had a very fit rider pedalling extremely hard to assist it. ;)

I'm sure Gary would be tempted to try his Townie up this hill if he lived a bit nearer to it:



Riding down it would be a good test for the regen too. :-\

Alan
 
« Last Edit: July 05, 2017, 05:02:58 PM by Bikemad »
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Offline Just

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Re: How is GM Pie-3 on hills (climbing on)?
« Reply #2 on: February 25, 2013, 05:13:16 PM »
Waw, Alan, is it you on the picture?

What's  slop would a single MP III take?

Have you ever compared the MP III 48V kit (single wheel) with 48V mid-motors (let's  say from Cyclone Motors)? Which one is more speedy? more powerful? (note that mid-motors are able to use a full range of the bike chainwheels).
« Last Edit: February 25, 2013, 06:07:20 PM by just »
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Offline GM Canada

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Re: How is GM Pie-3 on hills (climbing on)?
« Reply #3 on: February 25, 2013, 06:01:10 PM »
Quote from: Bikemad on February 24, 2013, 11:15:36 PM

I'm sure Gary would be tempted to try his Townie up this hill if he lived a bit nearer to it:



Riding down it would be a good test for the regen too. :-\

Alan

Lol, nice one Alan!

I was wondering how you got that picture of me until  I noticed it was a fake. My helmet is red!


Gary
« Last Edit: July 05, 2017, 05:01:05 PM by Bikemad »
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Offline GM Canada

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Re: How is GM Pie-3 on hills (climbing on)?
« Reply #4 on: February 25, 2013, 06:56:30 PM »
Quote from: just on February 25, 2013, 05:13:16 PM


What's  slop would a single MP III take?


Not sure what the grade is on the bridge in this video, maybe someone can estimate it from a freeze frame. I was riding the bike in Alan's picture with my trailer in tow. One MP III on the back and two 48V10AH batteries.

http://m.youtube.com/watch?v=S5RtYeUmW1U

Gary
« Last Edit: February 25, 2013, 06:59:56 PM by GM Canada »
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Offline Just

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Re: How is GM Pie-3 on hills (climbing on)?
« Reply #5 on: February 25, 2013, 07:13:04 PM »
What are the max peak and continuous currents allowed by the build-in controller in MP3?
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Offline MAGICPIE3FOCUSPOWER

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Re: How is GM Pie-3 on hills (climbing on)?
« Reply #6 on: February 26, 2013, 08:36:41 PM »
Max 75A and continuous 35A.
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Offline Just

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Re: How is GM Pie-3 on hills (climbing on)?
« Reply #7 on: February 26, 2013, 08:45:25 PM »
Quote from: MAGICPIE3FOCUSPOWER on February 26, 2013, 08:36:41 PM
Max 75A and continuous 35A.
Really? Have some measured it or it's just GM's "declaration"?
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Offline MAGICPIE3FOCUSPOWER

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Re: How is GM Pie-3 on hills (climbing on)?
« Reply #8 on: February 26, 2013, 08:47:32 PM »
Well Magic Pie is 1500Watt at 48V so......1500/48 =...

It's GM info.

I have really not measured it, because mine broke in short time.

I am using external one:-)
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Offline Bikemad

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Re: Current Settings
« Reply #9 on: February 27, 2013, 03:42:19 AM »

I suspect the programmed figures are a bit on the optimistic side as my Smart Pie controller is currently set to 30 Amps continuous and 70 Amps peak, but the highest current recorded so far (33.73 Amps) is less than half of the 70Amp peak setting.

Alan
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Offline MAGICPIE3FOCUSPOWER

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Re: How is GM Pie-3 on hills (climbing on)?
« Reply #10 on: February 27, 2013, 08:00:55 AM »
Peak or continuous?
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Offline Just

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Re: Current Settings
« Reply #11 on: February 27, 2013, 04:04:36 PM »
Quote from: Bikemad on February 27, 2013, 03:42:19 AM
I suspect the programmed figures are a bit on the optimistic side as my Smart Pie controller is currently set to 30 Amps continuous and 70 Amps peak, but the highest current recorded so far (33.73 Amps) is less than half of the 70Amp peak setting.
Alan
Exactly!
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Offline Bikemad

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Re: Peak or continuous?
« Reply #12 on: February 27, 2013, 04:47:17 PM »
Quote from: MAGICPIE3FOCUSPOWER on February 27, 2013, 08:00:55 AM
Peak or continuous?

My Turnigy Wattmeter stores the peak amps measured (absolute maximum).

Alan
 
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Offline MAGICPIE3FOCUSPOWER

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Re: How is GM Pie-3 on hills (climbing on)?
« Reply #13 on: February 27, 2013, 04:59:02 PM »
Thanks! ;D
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Offline Just

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Re: How is GM Pie-3 on hills (climbing on)?
« Reply #14 on: February 28, 2013, 06:37:53 AM »
Quote
I am using external one

What are yours max peak/continuous settings for the external controller?
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