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SURVEY - Research Request

Discussion in 'Polls / Surveys' started by brucehawsker, Mar 22, 2011.

  1.  
    brucehawsker

    brucehawsker Just Joined

    Joined:
    Dec 17, 2009
    Messages:
    119
    I am trying to compile a set of Wh/mile consumption numbers. Not to play one manufacturer off against another; I am quite willing not to have brands or marques attached to the data.


    To produce a distribution, I am asking you to post the following data:

    1. Voltage of your battery (V)
    2. Ah of your battery (marked Ah or sometimes A)
    3. The mileage you would expect from experience (not manufacturer's numbers) your bike to do from one full charge
    4. Whether your bike is a crank or hub motor
    5. What your weight is in kilos or stone or lbs (optional:D )
    I will analyse the results and report back.

    Could be make this a sticky, Mr Scott?

    Thank you for your help in advance.

    Bruce
    Last edited: Mar 22, 2011
  2.  
    morphix

    morphix Pedelecer

    Joined:
    Oct 24, 2010
    Messages:
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    Location:
    Worcestershire
    Suggestion: Could also take the weight of the bike, and how people ride, ie: throttle-only, pedal assist only, combination, moderate or high pedalling etc, to give a more detailed breakdown..
    Last edited: Mar 22, 2011
  3.  
    flecc

    flecc Member

    Joined:
    Oct 25, 2006
    Messages:
    27,807
    Bike example one, two owners results reported.

    37 volts

    10 Ah

    15 miles

    Hub motor

    70 kilos

    (24.7 Wh/mile)

    Also known with another owner of the same e-bike:

    37 volts

    10 Ah

    11 miles

    Hub motor

    Rider weight not known.

    (33.6 Wh/mile)

    Bike example two.

    26 volts

    10 Ah

    35 miles

    Crank drive

    70 kilos

    (7.4 Wh/mile)
    .
  4.  
    d8veh

    d8veh Pedelecer

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    10,000
    Location:
    Telford
    I keep data from every journey. I don't think I pedal that hard, but maybe I do because I seem to use less power that everybody else.
    Bike: Sunlova E-8F26M03S front hub motor
    Battery 9aH, 36v
    w/H per mile: 5.17 (982 miles)
    Range: 53 miles (using about 6.5 aH after which the battery goes flat up the final hill to my house)
    Bike weight: 27 Kg
    Rider weight: 101 kg
  5.  
    morphix

    morphix Pedelecer

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    Oct 24, 2010
    Messages:
    1,947
    Location:
    Worcestershire
    53 miles from 9Ah that's incredible! I'm curious is that on the lowest pedal assist level or?
  6.  
    HarryB

    HarryB Pedelecer

    Joined:
    Jan 22, 2007
    Messages:
    1,307
    Location:
    London
    Emotion

    26V

    10Ah

    14 miles (was 22 miles - new and in summer)

    Crank

    74kg

    Cytronex Trek 7.3FX

    36V

    4.4Ah

    11 miles

    Hub

    74kg

    Of course it all depends on the age of the battery. My Panasonic is doing really badly compared to when it was new (and in the summer).
  7.  
    NRG

    NRG Just Joined

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    Oct 6, 2009
    Messages:
    2,588
    Bafang Peugeot

    Using low/medium pedal assist 100% of the time.

    44.4v 10Ah

    8(low)~14Wh(medium) / Mile or 55 to 32 Miles

    80Kg

    Hub

    Kalkhoff Proconnect S

    Using ECO assist 100% of the time.

    26v 10Ah

    12T motor sproket: 7.4Wh / Mile or 35Miles
    11T motor sproket: 6.5Wh / Mile or 40Miles

    80Kg

    Panasonic crank drive
    Last edited: Mar 22, 2011
  8.  
    d8veh

    d8veh Pedelecer

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    Using the pedal assist only, the power gradually decreases to zero as the speed approaches 14mph, so, if you pedal at over 14mph, you don't use any power. My legs have gradually increased in power, so I can now manage pedalling over 14mph for prolonged periods. I keep a graph of how many amp-hours for my daily 30 mile commute, and since the new year, it has decreased from about 6 to 2 (as long as it's not windy). Now I should be able to do 3 journeys without re-charging making 90 miles. As I've said before, it can be very misleading making claims about range when you're pedalling at the same time, but, hopefully, people will read into some of the detail in this survey to get an idea of what they can expect.

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