Fuel economy calculator

Discussion in 'Australian Motorcycles' started by ray@bundy, Jan 8, 2007.

  1. ray@bundy

    ray@bundy Guest

    ray@bundy, Jan 8, 2007
    #1
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  2. ray@bundy

    Nev.. Guest

    Nev.., Jan 9, 2007
    #2
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  3. ray@bundy

    Damien Guest

    I've often had fun playing the game of seeing how accurate I can be
    with mental economy calculations, continuing until the very latest
    point at which I am confident there is still enough petrol to get to a
    petrol station, calculating how much petrol it should take, and
    therefore how accurate I actually was. I don't recall ever being out
    by more than half a litre at the very most, usually quite a bit less.
    If you know your bike, and can handle basic high school maths, it
    certainly isn't that hard at all. If I can do it[1], so can anyone!

    Damien
    GPX250 -> CBR600 -> F650/R1200GS (when the $$$ are there!)
    [1] I may teach high school maths, but that doesn't mean I know what
    I'm doing! :p
     
    Damien, Jan 10, 2007
    #3
  4. ray@bundy

    Theo Bekkers Guest

    Doesn't everyone? e.g. kms/litre x 3 - 5% = mpg.
    The new bike has this jazzy display that tells me instantaneous fuel
    consumption, average fuel consumption in l/100km. And, after the reserve
    light comes on, how far it has gone since the light came on. Too easy
    really.

    Theo
     
    Theo Bekkers, Jan 10, 2007
    #4
  5. ray@bundy

    Damien Guest

    Why do they always insist on giving us wank figures in L/100km, rather
    than useful figures in km/L? Sure, you can easily convert from one to
    the other anyway, but if they're going to give you a figure surely the
    most useful is the one to give? L/100km is good for the sales people
    trying to compare one vehicle against the other, but km/L is what you
    really need to know out on the road.

    I don't particularly care how many litres I'll use if I drive/ride
    100km - I very rarely drive such precise distances! I want to know how
    many kilometres I'll get out of each litre, so I know how far I'll
    ACTUALLY be able to go on the petrol I have just put in, or think is
    still in there. I always convert L/100km figures into km/L, so if a
    computer is going to calculate the figures anyway, at least they could
    give it in the format that will be of most use to most people.

    It's a little thing, I know, but I've always wondered why they do it
    this way?

    Damien
    GPX250 -> CBR600 -> F650/R1200GS (when the $$$ are there!)
     
    Damien, Jan 10, 2007
    #5
  6. ray@bundy

    Theo Bekkers Guest

    I'm happy to use the international standard. If I know I get 5 l/100kms then
    it's not hard to work out how afr you get on 20 l.

    Theo
     
    Theo Bekkers, Jan 10, 2007
    #6
  7. ray@bundy

    Nev.. Guest

    So you're a high school maths teacher who doesn't recognise a metric
    unit when you see one?

    Nev..
    '04 CBR1100XX
     
    Nev.., Jan 10, 2007
    #7
  8. ray@bundy

    Theo Bekkers Guest

    I've always wanted to see barometric pressure measured in gallons of mercury
    per hectare. Those pesky pascal things are so confusing.

    Theo
     
    Theo Bekkers, Jan 11, 2007
    #8
  9. ray@bundy

    Hammo Guest

    Ah, you just never came to one of my chem labs, Is all.

    Hammo
     
    Hammo, Jan 11, 2007
    #9
  10. ray@bundy

    Theo Bekkers Guest

    The last thing I want to see is the slab in your lab. Unless it's a slab of
    beer, of course.

    Theo
     
    Theo Bekkers, Jan 11, 2007
    #10
  11. ray@bundy

    G-S Guest


    Litres per 100kms is an easier calculation than km/l for approximate
    remaining distance one can travel and fuel needed.


    An example?

    Well I know I can do 300kms on a tank of fuel in my bike which holds 20
    litres.

    That means when I have half a tank I know I can do another 150kms roughly.

    And I have enough fuel to get (just) to the town 150kms away.



    Somewhat simpler than the alternative of saying... "well I know my bike
    gets about 13 and a third kilometres per litre.

    I also know that the town I need to ride to is 150 kms away.

    That means I need 150 divided by 13 and a third litres fuel.

    Which is *ummm* 10... *ummm* 11... *ummm* 11 and a bit litres...



    Now wasn't the first way easier?



    G-S
     
    G-S, Jan 11, 2007
    #11
  12. ray@bundy

    Damien Guest

    Fair enough, it's really just a matter of preference in the end
    anyway, so no big deal which way they use.

    Damien
    GPX250 -> CBR600 -> F650/R1200GS (when the $$$ are there!)
     
    Damien, Jan 12, 2007
    #12
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