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Thread: Wipers

  1. #1
    Regular Member david173's Avatar
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    Default Wipers

    Just a random thought that's bugged me all my life - why do only hatchbacks have rear wipers and (nearly) all saloons don't?

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    Regular Member david173's Avatar
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    50 points for an answer before i go to bed

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    Regular Member sig63's Avatar
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    Vehicle : Opel Insignia

    Trim : Cosmo

    Engine : 2.0 CDTI

    Year : 2011

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    To complicated to explain it in English, but it has something to do with aerodynamics: because of the turbulence of a saloon in motion there should be (theoretically) no raindrops on the back of the car... (but this doesn't work if you're standing still )
    And there is another reason: mostly a rear wiper is ugly, but on a hatch it is needed

  4. #4
    Regular Member simac's Avatar
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    With a saloon it's harder to hide the wiper motor.

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    Regular Member S888 SRB's Avatar
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    Thats a good point. I remember the Orion which later became the saloon Escort had a rear wiper and a ****** great lump at the bottom of the rear screen causing a blind spot...

  6. #6
    Ex-Staff Full Member Ian T's Avatar
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    Quote Originally Posted by sig63
    And there is another reason: mostly a rear wiper is ugly, but on a hatch it is needed
    I do miss the rear wiper at times though

  7. #7
    Regular Member david173's Avatar
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    Quote Originally Posted by S73VE B
    Thats a good point. I remember the Orion which later became the saloon Escort had a rear wiper and a ****** great lump at the bottom of the rear screen causing a blind spot...
    Yeah, thats the one exception i remember thinkin about, was quite odd to look at cos saloons never have them!

  8. #8
    Regular Member Harry's Avatar
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    i'm sure either the scoobys or evo have them, can't remember which now.

    not sure if they still do on the very latest ones.

  9. #9
    Regular Member SignumPhil's Avatar
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    It's a thing called the "venturi affect". When a vehicle travels throough the air, it leaves a low pressure zone behind it, and air (and rain) move in to equalize the pressure.
    The lack of overhang on a hatch or estate means that all the water ends up on the rear screen. This isn't normally an issue on a saloon.
    It's still handy to save wiping the rear screen, though!

    Phil

  10. #10
    Regular Member G.O'Rilla's Avatar
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    Nissan 200SX had rear wiper as well. Looked naff but needed. Thanks to the above - I knew is was something to do with aerodynamics but now I know. Does this also explain why some Jap cars in the early 90's (Camry estate) found it necessary to have two rear wipers? Even worse aerodynamics? In which case the current Honda Accord estate should have at least three.........

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