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Thread: KE70 Active Aero

  1. #1
    Senior Member mrbigport's Avatar
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    Default KE70 Active Aero

    Ok guys....don't knock it before you try it. when I built this I had my doubts, but the next track meet I picked up 1.1 seconds around the QR sprint circuit, so something was working, and the times have only got better since.

    Enjoy


    <iframe title="YouTube video player" width="480" height="390" src="http://www.youtube.com/embed/z8NDuIXqSZo" frameborder="0" allowfullscreen></iframe>

    4agte KE70 263.6whp

    QR Sprint Circuit 1:02.9
    QR Sprint Circuit 60.7 (turbo)
    QR Clubman Circuit 1:06.41 (first outing NA)
    QR Clubman Circuit 1:02.77 (turbo)

    http://www.ae86drivingclub.com.au/fo...ustom-Stickers
    full colour windscreen banners from $45!

  2. #2
    Senior Member Adsie's Avatar
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    Default

    Haha I remember seeing this when I lined up behind you at QR thinking WTF, but if it works for you.

  3. #3
    Senior Member mrbigport's Avatar
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    Default

    when ya gonna come back?? open sprints ftw
    4agte KE70 263.6whp

    QR Sprint Circuit 1:02.9
    QR Sprint Circuit 60.7 (turbo)
    QR Clubman Circuit 1:06.41 (first outing NA)
    QR Clubman Circuit 1:02.77 (turbo)

    http://www.ae86drivingclub.com.au/fo...ustom-Stickers
    full colour windscreen banners from $45!

  4. #4
    Veteran blake.'s Avatar
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    Default

    haha thats mad.
    Quote Originally Posted by Gunner View Post
    Id explain more but there people on here I dont like, and i want to see this shit on thsir supposedly awesome masterfully built but stock power making 20v
    bursting ovaries since 92'

  5. #5
    Gunner
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    Default

    haha sick, wheres the rest of the info? How have you done it, hows it work?

  6. #6
    Senior Member Adsie's Avatar
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    Default

    Soon hopefully, had problems with the car but thats sorted now so just need to put interior back together.

  7. #7
    Veteran blair's Avatar
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    Blair
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    Default

    How is the "active" part of it activated man?

    Does it change angle with speed, if so, does it have an electronic controller with a speedo input or something?

    Or does it have a super sweet cable from the cabin lol

    looks like fun

  8. #8
    Senior Member mrbigport's Avatar
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    Default

    ok some info...

    the wing is constructed from 0.5mm aluminium sheet with a poly tube chord and bonded balsa ribs.
    the end plates I designed in autodesk inventor and had laser cut and cnc bent to shape.
    the motor is a high torque servo motor normally used as the throttle control motor on a large marine engine fly by wire setup
    the motor has moveable limit switches at each end allowing the max and min angles to be changed between runs (soon to be adjustable on the fly)
    the wing is switched off the brake light switch, its a little crude but effective.

    because the wing has a surface area of nearly half a square meter when vertical, the drag is definitely noticeable but more importantly the car is much more stable under braking.

    I'm not saying its perfect, its not. the aerofoil has irregularities, the motor needs to be faster, and i need to wire up an intermediate position for high speed corners as I found i can take turn 1 at QR under full acceleration at the top of 4th if i use a small amount of left foot brake to bring the wing on.

    It was a bit of an experiment and it seems to be working. its far from one of the aeromotions mega-dollar setupsbut for a weekends work and $100 its a good start
    4agte KE70 263.6whp

    QR Sprint Circuit 1:02.9
    QR Sprint Circuit 60.7 (turbo)
    QR Clubman Circuit 1:06.41 (first outing NA)
    QR Clubman Circuit 1:02.77 (turbo)

    http://www.ae86drivingclub.com.au/fo...ustom-Stickers
    full colour windscreen banners from $45!

  9. #9
    Senior Member mrbigport's Avatar
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    Default

    the basic way it works is this...

    when there is power to the motor it tilts the leading edge of the wing up until it hits the limit switch, this is the wing level or minimum drag position. since the motor is gear driven, trust me its not moving once its engaged.
    when i hit the brakes the brake light circuit reverses the polarity of the motor and it tilts the wing to the maximum tilt position until it hits the second limit switch.
    when i release the brakes the motor reverse polarity again and returns to wing level position.
    4agte KE70 263.6whp

    QR Sprint Circuit 1:02.9
    QR Sprint Circuit 60.7 (turbo)
    QR Clubman Circuit 1:06.41 (first outing NA)
    QR Clubman Circuit 1:02.77 (turbo)

    http://www.ae86drivingclub.com.au/fo...ustom-Stickers
    full colour windscreen banners from $45!

  10. #10
    Senior Member
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    Akio
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    Default

    have you tested your car with a non-adjustalble aerofoil to see what the results would be?
    IE steal some towel rack off of someone, set it to the optimum position and hit the track again to see if the gains were down to the adjustable aerofoil or just having something on the back creating rear downforce.

    looks good for a weekends work and a few $$$, would be good to see if you could set it so when your braking it works similar to that of the veyron

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