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Thread: Is the dominant drive wheel of the Mirage the front passenger tire?

  1. #31
    Moderator Eggman's Avatar
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    Quote Originally Posted by Fummins View Post
    Jack up the front of your car, fire it up, put it in gear. Stop or slow down one of the wheels, the other one will speed up. Unless you have a spool or a lincoln locker. I guess it's not science but magic
    And in every scenario, both driven wheels receive an equal amount of power, as foama has suggested.

    Quote Originally Posted by foama View Post
    There is practically no measurable difference in torque between the wheels, even with the steering turned all way.
    I *think* I get this point. In an open differential, this makes sense to me.


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        click to view fuel log View my fuel log 2015 Mirage ES 1.2 manual: 49.6 mpg (US) ... 21.1 km/L ... 4.7 L/100 km ... 59.5 mpg (Imp)


  2. #32
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    Quote Originally Posted by Fummins View Post
    Jack up the front of your car, fire it up, put it in gear. Stop or slow down one of the wheels, the other one will speed up. Unless you have a spool or a lincoln locker. I guess it's not science but magic
    Twice as fast to be exact. Because differential gear ratios and ****ing unicorn farts.

        __________________________________________

        click to view fuel log View my fuel log 2018 Mirage ES 1.2 manual: 43.5 mpg (US) ... 18.5 km/L ... 5.4 L/100 km ... 52.2 mpg (Imp)


  3. #33
    Senior Member DonkeyPal's Avatar
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    So much in the universe is explained by the flatulent unicorn factor.

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        click to view fuel log View my fuel log 2015 Mirage DE 1.2 automatic: 43.0 mpg (US) ... 18.3 km/L ... 5.5 L/100 km ... 51.7 mpg (Imp)


  4. #34
    Moderator Eggman's Avatar
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    Quote Originally Posted by nickels View Post
    Twice as fast to be exact.
    Perhaps I misunderstand your point but I'm not sure wheel speed is directly correlated with power.

    One can have a shaft rotating at 1000 RPM that stalls when loaded at one foot/pound of torque. Think of a wind-up propeller on a toy airplane.

    Conversely one can have a shaft spinning at ten RPMs that can generate 500 foot/pounds of torque. Think tractor PTOs or ship's propeller shafts.

    Which do you suppose will perform more work?

        __________________________________________

        click to view fuel log View my fuel log 2015 Mirage ES 1.2 manual: 49.6 mpg (US) ... 21.1 km/L ... 4.7 L/100 km ... 59.5 mpg (Imp)


  5. #35
    Senior Member AtomicPunk's Avatar
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    Did we lose Fummins off the site? Haven't seen any posts in a while, and he would know the answer to this, I'm sure.

  6. #36
    Moderator Eggman's Avatar
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    Quote Originally Posted by AtomicPunk View Post
    Did we lose Fummins off the site? Haven't seen any posts in a while, and he would know the answer to this, I'm sure.
    ?

    He's posted three times in this thread.

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        click to view fuel log View my fuel log 2015 Mirage ES 1.2 manual: 49.6 mpg (US) ... 21.1 km/L ... 4.7 L/100 km ... 59.5 mpg (Imp)


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    Senior Member AtomicPunk's Avatar
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    Quote Originally Posted by Eggman View Post
    ?

    He's posted three times in this thread.

    Sorry, hadn't read all these pages. Tried to just send that to you, but it wouldn't go through; something about your mailbox being full...thanks for the reply, even though I looked like an idiot, lol.

  8. #38
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    Quote Originally Posted by Eggman View Post
    Perhaps I misunderstand your point but I'm not sure wheel speed is directly correlated with power.

    One can have a shaft rotating at 1000 RPM that stalls when loaded at one foot/pound of torque. Think of a wind-up propeller on a toy airplane.

    Conversely one can have a shaft spinning at ten RPMs that can generate 500 foot/pounds of torque. Think tractor PTOs or ship's propeller shafts.

    Which do you suppose will perform more work?
    If both wheels are turning at 10kmh, and input speed is maintained, stopping one wheel will cause the other to rotate at 20kmh, in an open diff. Power is not part of this equation, only the differentials spider gears.

    I am not debating anything other than how a differential operates, which I know a great deal about. I claim no knowledge otherwise.

        __________________________________________

        click to view fuel log View my fuel log 2018 Mirage ES 1.2 manual: 43.5 mpg (US) ... 18.5 km/L ... 5.4 L/100 km ... 52.2 mpg (Imp)


  9. #39
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    To summarize, power goes where traction or lack thereof allows it. Input speed must match combined average speed of tires. Power is irrelevant, to -my- comments.

    Power is irrelevant in transfer of input rotational speedto wheels, if you want to debate work performed or slipping clutch plates, that's all theoretical. I am only addressing the operation of an open differential itself, and ignoring differential and gearing ratios. They must match, whether at 2.72, 3.01-4.56:1, whatever.

        __________________________________________

        click to view fuel log View my fuel log 2018 Mirage ES 1.2 manual: 43.5 mpg (US) ... 18.5 km/L ... 5.4 L/100 km ... 52.2 mpg (Imp)


  10. #40
    But what about in reverse?


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        click to view fuel log View my fuel log 2014 Mirage SE wussie cvt edition. 1.2 automatic: 37.7 mpg (US) ... 16.0 km/L ... 6.2 L/100 km ... 45.3 mpg (Imp)


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    Eggman (04-03-2019)

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