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Author Topic: wire between spill plates  (Read 589 times)
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revolutionary
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« on: September 19, 2017, 08:53:07 AM »

I am considering using wire between the front portions of my spill plates, similar to that as used by funny cars to keep the spill plates from pushing out.


Below is my setup.  Comments welcomed as to necessity and class legality (ALT and CC)
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Sumner
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« Reply #1 on: September 19, 2017, 09:28:56 AM »



I don't think you need them.  Not sure what gauge Hooley made ours out of but never had a problem and the car was sideways a couple times  embarassed.



I wondered about the current configuration with the wing but there again the car was sideways and the large verticals kept it from going around  and weren't damaged,

Sumner

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manta22
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« Reply #2 on: September 19, 2017, 11:55:43 AM »

Remember that even a thin wire has surprisingly high drag. A small brace made from thinwall streamline tubing will be a better choice.

Regards, Neil  Tucson, AZ
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Regards, Neil  Tucson, AZ
Eddieschopshop
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« Reply #3 on: September 19, 2017, 12:53:03 PM »

Those funny car ones are super thin also.  You won't have a problem
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ronnieroadster
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« Reply #4 on: September 19, 2017, 02:09:24 PM »

Like Manta22 wrote those wires are an aero drag which is not what you want for top speed runs. Look on Youtube there's interesting experiments that show how much drag even the smallest diameter round surface has compared to a tear drop shape. 
 Ronnieroadster
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Rex Schimmer
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« Reply #5 on: September 19, 2017, 05:25:20 PM »

Remember that wire ONLY works in tension so it will carry load if you pull on it but not if you push on it. I agree with Neil, some nice small section aero tube will give you strength in both directions and look a lot better!! All present day funny cars use the aero tube approach.

Rex
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bobh
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« Reply #6 on: September 20, 2017, 06:47:25 AM »

Wires used for biplane wings can be either streamlined or not. Check with aircraft spruce or wag aero.
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floydjer
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« Reply #7 on: September 20, 2017, 08:09:02 AM »

And I am just quessing here..But you`d want to triangulate the tubes  to the center line to prevent them from acting upon one another in a spin. maybe.
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WOODY@DDLLC
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« Reply #8 on: September 20, 2017, 08:10:05 AM »

https://en.wikipedia.org/wiki/Aeolian_harp
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revolutionary
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« Reply #9 on: September 20, 2017, 08:22:13 AM »

Thanks for all the input.  It seems like a tube is the best all around.
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Sumner
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« Reply #10 on: September 20, 2017, 08:54:49 AM »

How many cars now use or don't use wires/tubes between their spill plates??  Why put yourself to an aerodynamic disadvantage if it isn't needed??

Sumner
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