Let's Talk Aero

[Grant 302]

Exactly. I'd just check the tape to make sure it stays and bring a roll of tape with you to the track just in case. Oils on the plastic can make sticking tough and need to be cleaned off with solvents to ensure good adhesion.

That's what the foam looked like to me. Either for window sealing, or 'backer rod' for caulking or window seals and such. Or the type for insulating pipes, but I thought most of those would be too big.

 

[Daegoba]

Thanks
What you mean with clean up? Like donig it better
The idea was to " level " the step btw the lip and the pp1 splitter and also cover all the holes the pp1 has (if you zoom you can see them) .


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Yeah, this is a much better picture, and honestly, I’d just tape the holes and not worry about the step. I would definitely use countersink bolts, but outside that, you’re doing pretty good.

It would be good to level the step between, but I think you’d be better off making some sort of insert than you would taping it up.

You should notice a difference for sure. Nice work, man.

 

[flyhalf]

Thanks guys for the advice.

I originally had the countersick bolts with nut rivets. When i put the seal and start to tighten up the bolts all the nuts went boom. And popped out from the plastic bumber so I've decided to go bolt and nut. Ot is really really solid.
My concern now is
the lip is much more solid than before and if i apply pressure the lower part of the bumper flex(see pic).
I'll put rods soon.
I know rods to chassis will be better. But in the 18 is hard tomconnect them in the lower part so it should be in the front.
But Will standard plastic bumper rods enough?


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[Grant 302]

I’d go to the bumper and support the corners before the center. That’s what I’d do if I wasn’t using the Ford bracket for S197.

 

[blacksheep-1]

Flyhalf, that foam may not cut it, throw some tape over that seam for the track.

 

[flyhalf]

I might i tested 300miles and seems goos so far Rob.
But I'll put some when i put the rods!

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[Grant 302]

My opinion is still that it's fine. Cylindrical profiles like that tend to act like O-rings and seal pressure very well. Tapes will pull and stretch under deflection and lose adhesion while the foam should just expand and contract.

And aerodynamic pressures are only in the sub 1 psi range...

 

[Mad Hatter]

I Guess I need to lower my splitter.. Looking for options in foam etc... But it did not vibrate or rattle at 215km/hr (134 mph for the non-metric types). But think I need to add a little more angle...

 

[Grant 302]

Dohn worry about the angle! Get it as low as you can tolerate.

Looks great and well supported!

But your transponder is blocking airflow!

 

[Mad Hatter]

True!! But it was really cold. Last time ended up third by a hood length! So wanted it as up front as possible

 

[Grant 302]

Then tie it to the front of the splitter on one of the stanchion/support rods!

 

[Mad Hatter]

Yes we went the rigging route!! Could not find anything smaller in time...
They can hold several tons Lol

 

[AJ Hartman]

I gotta stay up with this thread more often. Some good info in the last few pages. Some totally wrong.

 

[AJ Hartman]

I've started a vlog series going over some aero changes on my car. Heres one of the latest, but feel free to go back a bit to see how I handled things.

 

[Mad Hatter]

I gotta stay up with this thread more often. Some good info in the last few pages. Some totally wrong.

Now you have me wondering what I may have done wrong!!!

 

[Grant 302]

I gotta stay up with this thread more often. Some good info in the last few pages. Some totally wrong.

Great idea! Let's fix everything wrong about aero on the interwebs! I would start here...

I thought the direction that circulation bubbles rotate was obvious. I was wrong.


Understand the difference between Adverse Pressure Gradient and Flow Separation. Don't use one to sound smarter than the rest of YouTube.


And I'm not sure where to start with this one:

Now you have me wondering what I may have done wrong!!!

Somehow, I don't think he's talking about your posts.

 

[Mad Hatter]

 

[Mad Hatter]

My wing is sitting in Miami waiting for its flight, looking forward to trying it out soon. Guess we will try it out at 0 degrees first and then progressivly log the results as we increase the angle... Need lots of track time to work things out! Yeeehaaa!

 

[Grant 302]

Now you have me wondering what I may have done wrong!!!

As far as I'm concerned, the aero things you have done wrong are:

Not making a splitter SOONER.
Not getting a wing SOONER.

Do I need to make the pattern obvious?

 

[ArizonaBOSS]

I Guess I need to lower my splitter.. Looking for options in foam etc... But it did not vibrate or rattle at 215km/hr (134 mph for the non-metric types). But think I need to add a little more angle...

Looks like the rebuild came out great!