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To gurney or not to gurney

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Old Dec 28, 2021 | 10:13 AM
  #31  
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From: Houston
Originally Posted by MinusPrevious
Nice pics & thanks. I understand better how the wing was constructed. If you want, you can make a new thread to support this tear down & re-construction? Its up to you or i will change the title to this thread so it can be found in a search

Thanks, Joe
Will do, once I have materials sorted out I'll get the gurney too if it looks cool
btw did your hood get damaged at the mounting points?
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Old Dec 28, 2021 | 11:14 AM
  #32  
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From: So.Cal
Originally Posted by ViciousLSD
Will do, once I have materials sorted out I'll get the gurney too if it looks cool
btw did your hood get damaged at the mounting points?
No, wing mounting points were OK. The only damage was the wing failing & smacking the trunk surface & denting it

Last edited by MinusPrevious; Dec 28, 2021 at 11:36 AM.
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Old Dec 28, 2021 | 11:42 AM
  #33  
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From: Houston
Originally Posted by MinusPrevious
No, wing mounting points were OK. The only damage was the wing failing & smacking the trunk surface & denting it
hmm trying to figure out if stopping the verticals from leaning inwards would do the trick. Some joint would have flexed/cracked for it to bend no?
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Old Dec 28, 2021 | 11:52 AM
  #34  
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From: So.Cal
Originally Posted by ViciousLSD
hmm trying to figure out if stopping the verticals from leaning inwards would do the trick. Some joint would have flexed/cracked for it to bend no?
Thats a good question whether the verts leaned in but what i still have a hard time understanding is how the wing dented the trunk? It must have snapped w/such a force to dent the metal trunk. And the horizontal wing didnt fail in the exact middle. It failed just a bit offset to the passenger side.
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Old Dec 28, 2021 | 12:19 PM
  #35  
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From: Houston
Originally Posted by MinusPrevious
Thats a good question whether the verts leaned in but what i still have a hard time understanding is how the wing dented the trunk? It must have snapped w/such a force to dent the metal trunk. And the horizontal wing didnt fail in the exact middle. It failed just a bit offset to the passenger side.
not at the middle just means thats the weakest part of the resin/CF work i think. I would have expected it to break at the bolts since that area can wear fast, especially from rust/water retention. I got cocoon type webbings and small leaves in there so a good amount of moisture is going inside as well
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Old Dec 29, 2021 | 11:55 AM
  #36  
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From: Houston
Err curtain rods are the best (weight, rigidity, dimensions) I can find
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Old Dec 29, 2021 | 10:45 PM
  #37  
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here's how I separated the verticals. Use 1 first, then 2 wedges that would apply the lift. Use the heatgun and blow thru the bottom and a little bit on the seams (if you can see the adhesive). with the wedges you will hear the velcro separate as the adhesive softens and stretches. move the wedges inwards as the gap increases. you can use a 3rd tool to cut the soft adhesive or to add lift. You can also separate/wedge between the velcro strips once theyre accessible



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Old Dec 29, 2021 | 10:50 PM
  #38  
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From: Houston
Rods are in. Still looking for 1 for the trailing edge



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Old Dec 30, 2021 | 05:04 AM
  #39  
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From: So.Cal
When you get a few minutes, open up a new thread (EVO 9 Wing Disassembly) & load all these pics & written details

This is likely the first time we have seen this level of disassembly w/the goal of making the wing stronger for track use

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Old Dec 30, 2021 | 07:01 AM
  #40  
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Cool

Buckling - Once the wing starts to bend the section changes and it weakens at an exponential rate ^3 power of dimension change. I am guessing here but I think the pour in expanding foam will help more than the rods. Since it will contact upper and lower faces of the wing and is many times as stiff as air. Also no foam in the 9 and 8 has foam no problems. Foam will prevent buckling failure ie you can hang a car from a 2x4 but you can't set one on a 2x4 due to bucking.

Originally Posted by MinusPrevious
Yep, your wing should be the hollow vs the foamed 8 wing. But for street use, you will never have that issue of overload

Heres was my damage (it snapped so hard, it dented my sweet black trunk as well)
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Old Dec 30, 2021 | 09:40 AM
  #41  
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From: Houston
Originally Posted by mitsuatb
Buckling - Once the wing starts to bend the section changes and it weakens at an exponential rate ^3 power of dimension change. I am guessing here but I think the pour in expanding foam will help more than the rods. Since it will contact upper and lower faces of the wing and is many times as stiff as air. Also no foam in the 9 and 8 has foam no problems. Foam will prevent buckling failure ie you can hang a car from a 2x4 but you can't set one on a 2x4 due to bucking.
I agree but IMO if a rectangle changes to 2 triangles, something else(angles) changed because CF would not have stretched so it would have bent at the bolts, or the verticals leaned inwards which suggests it doesn't have a good footing. 1) The rods adds to the strength at the CF-to-bracket bolts and middle section of the CF. 2) I am not confident I can 100% fill the empty space with expanding foam, or if the inside surface will adhere. 3) High density foam is heavy, I'm not sure which one is right. I'm thinking 'big gap filler' so its less concentrated. Anyway additional solid surface provided by the rods would help in the function of the foam
It's mostly an over reaction to the pic provided by MinusPrevious
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Old Dec 30, 2021 | 11:04 AM
  #42  
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From: Houston
https://www.evolutionm.net/forums/ev...ancements.html
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