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Old 10-14-2018, 09:55 PM
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A nice coating of gelcoat will keep oil and water out of the wood.
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Old 10-15-2018, 05:45 AM
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Originally Posted by emilio700 View Post
I saw that post and moved it the aero sub forum a few weeks ago. Thanks for the contribution.
Thanks Emilio. I have tried to make it usable but without a modulus for all it makes it design decisions much harder. I am working on it
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Old 10-15-2018, 10:42 AM
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Modulus key.
Failure mode also important.
Does it stay bent or shatter.
Abrasion resistance.
Cost per square/ft.
Before Alumalite, birch was the next best thing to Tegris or dry carbon.
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Old 10-15-2018, 11:55 AM
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Originally Posted by emilio700 View Post
Modulus key.
Failure mode also important.
Does it stay bent or shatter.
Abrasion resistance.
Cost per square/ft.
Before Alumalite, birch was the next best thing to Tegris or dry carbon.
That is an interesting point you make.
Perhaps there needs to be an idea of where the bend shatter cross over is.
Although given the range being very grouped I guess it won't be accurate.
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Old 10-22-2018, 06:11 PM
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I've been considering whipping up a wing setup for my car, and an end plate mounted wing came to mind, since big end plates seem to help with efficiency and normal uprights disrupt flow.
Is there a good reason why they're not used in GT cars or other racing? It's prevalent in F1 , but I wasn't sure if that was due to a restriction on F1s side, or a restriction in other race classes. the NOPRO guys used it on their GT300 car, but that wasn't exactly a winning car.

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Old 10-23-2018, 08:02 AM
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Not used on GT3 cars due to rules- note they are used on LMP cars.
Mounting on a Miata is a challenge, note how small the wing in that picture is. To have a full sized 65-68" wing you need to make some kind of fender mounts.
It's often easier, lighter, cheaper and stronger to just have a gooseneck setup. Which you often see on GT/GTLM cars.
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Old 11-10-2018, 12:30 PM
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Question to those who run a splitter + flat underbody (+ diffuser): do you still run the stock undertray? I've seen a lot of splitter setups, yet nobody seems to shield the engine bay from the high pressure wheel well area. I guess this must decrease radiator efficiency, wouldn't it? Or does the wheel well have less pressure than the bay?

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Old 11-10-2018, 02:00 PM
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I have full splitter only and ditched my undertray. Front airdam is tightly ducted to radiator and I have both hood vents and fender vents. I figure the combination of those two should be adequate to pull some air out of the bay, not that I'm really concerned about bay temps- my intake tube is wrapped and ducted though the headlight, and nothing else under there is going to get hot enough to care.
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Old 11-10-2018, 02:18 PM
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I retain the stock undertray, but the fender liners are both missing.

The wheelwell holes by the headlights are problems. Fender liners or front mini tubs would be huge to minimize wheelwell air volume. Build them as close to full bump travel as possible.
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Old 02-17-2019, 05:26 AM
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Old 02-17-2019, 12:14 PM
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Not sure what we are looking at. You appear to have an alumalite undertray and then he wooden one underneath that.
If the wood under tray is the final product those reinforcing braces are going to get caught on stuff if you drop a wheel off track. It needs to be smooth underneath for it to work, and survive. Also that oil color does not appear to have any ducting. Is that the final iteration or are you going to enclose it somehow?
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Old 02-17-2019, 01:38 PM
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Originally Posted by emilio700 View Post
Not sure what we are looking at. You appear to have an alumalite undertray and then he wooden one underneath that.
If the wood under tray is the final product those reinforcing braces are going to get caught on stuff if you drop a wheel off track. It needs to be smooth underneath for it to work, and survive. Also that oil color does not appear to have any ducting. Is that the final iteration or are you going to enclose it somehow?
I just wanted to show the process to design my template.
Final product is a composite (not alumalite itself).








Flat floor has two security bolts to the lower subframe and rest of them are quick fasterners.

I will design front splitters and canards tomorrow (only for track events because they canīt be MOT registered and i use my car almost for daily).
Something easy to mount and not so big.
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