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> BUILD-OFF CHALLENGE: Tygaboy's '75 LS3, It seemed a good idea at the time...
dan10101
post Dec 6 2020, 04:17 PM
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I like the mesh idea. Can't wait to see what you come up with.
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AZBanks
post Dec 6 2020, 05:08 PM
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QUOTE(tygaboy @ Dec 5 2020, 06:38 PM) *

QUOTE(AZBanks @ Dec 5 2020, 12:11 PM) *

I like the black but I think it would look even better if it matched the color of your wheels.
But then again, I am a sucker for dark grey metallic.


Holy Jebus, man! First it's the angles and now you're complaining about color? (IMG:style_emoticons/default/ar15.gif)
No Christmas card for you... (IMG:style_emoticons/default/santa_smiley.gif)




I'm ok with the missing Cristmas cars as long as I get my royalty checks when you become a multi-brazillionare from selling dark grey metallic RandAzBanks Black Edition ™ design hood vents. .0914% of net profits. Payable in 914 parts.
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tygaboy
post Dec 6 2020, 05:16 PM
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QUOTE(914forme @ Dec 6 2020, 12:34 PM) *

Getting closer Chris,

Only thing I see is the first vent needs to be filled and just have the tip up on the front.

then you follow Tony's suggestion of decreasing hight of the tips. Angles are really getting good about mid way up your variable angle. I am away from my paper and pen otherwise I would draw it out.

Most of all have fun with the build.


@914forme Stephen - Thanks. Based on what I know from the first yarn test, I'm leaving things pretty much as they are in this latest version. I'll do another yarn test to see how it works but I wouldn't be surprised if I need to increase the vane angle.
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sixnotfour
post Dec 6 2020, 05:35 PM
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True but the other fender has backwards decreasing radius,, 914 is an uphill battle or favor..
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Cairo94507
post Dec 6 2020, 06:06 PM
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Chris, @tygaboy that is looking very cool. I think once you get the center support finalized and add the screening of some sort, you have a done deal. I can't wait to come see it. (IMG:style_emoticons/default/beerchug.gif)
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Krieger
post Dec 6 2020, 09:30 PM
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That strake looks soooo good!
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tygaboy
post Dec 7 2020, 02:09 PM
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Both sides in with temp rivets, ready for the next yarn test.

This is the first time both sides have been in and even though these aren't the final versions, I have to say, I'm thrilled with how the car looks.
I think they hint there's something going on but they don't scream it. Just what I was hoping for.

Fingers crossed they work as expected.


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tygaboy
post Dec 7 2020, 02:10 PM
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My current favorite pic.


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mikey63
post Dec 7 2020, 03:00 PM
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Looking good Chris!! With both sides done, it really makes a huge difference.
(IMG:style_emoticons/default/driving.gif)
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djway
post Dec 7 2020, 10:05 PM
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Mmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmm (IMG:style_emoticons/default/smile.gif)
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altitude411
post Dec 7 2020, 11:08 PM
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(IMG:style_emoticons/default/unsure.gif) Well after 8 pages your almost there.... but you forgot KELTY360 and me (IMG:style_emoticons/default/sad2.gif)




..."and lights! You could put lights underneath that would show when you open the vents.
(IMG:style_emoticons/default/smile.gif) "---KELTY360


" (IMG:style_emoticons/default/idea.gif) ...and sensors with thermal resistors hooked to the servos that would automatically open them when needed. (IMG:style_emoticons/default/popcorn[1].gif)

* and of coarse obviously turn on the lights... (IMG:style_emoticons/default/piratenanner.gif) " ---altitude411

(IMG:style_emoticons/default/dry.gif)

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dan10101
post Dec 8 2020, 11:17 AM
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Chris,
I really like the look.

At the risk of initiating another 'do-over'
I just found this.
https://racelouvers.com/

It's more for those of us that don't have your skills but their testing is interesting.
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tygaboy
post Dec 8 2020, 03:04 PM
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Vent test V2. A few things:
- it's actually yarn! I hope you're OK with the color. (IMG:style_emoticons/default/poke.gif)
- the two pieces on the hood to the left of the vent show what's going on where there isn't a vent: No air lift. @Cairo94507 , you asked about this after that first vent video.
- there are a couple pieces of yarn in the vents that got stuck on the tape and couldn't stand up.

In all, same basic non-scientific result:
- hardly any flow at the rear vanes
- overall, the vents seem to work


https://www.youtube.com/watch?v=_E-bt9EEZeI


Then it was the fan test. Same deal as before, the belt still needs to be adjusted, sorry.
And you can see how those couple stuck pieces stand right up, once unstuck.


https://www.youtube.com/watch?v=Esx5A2JaaCo


I may do other tests but I'll probably move forward with these as is.
Next, I think I'll look into building a duct from the fans to the vents.

Then it's on to the rear of the car. What has Tony @Retroracer drawn up for me this time? (IMG:style_emoticons/default/drooley.gif) (IMG:style_emoticons/default/happy11.gif) Guess you'll have to keep following the build. (IMG:style_emoticons/default/shades.gif)
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Cairo94507
post Dec 8 2020, 03:19 PM
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OK - I think you have a winner there. I liked the fan test the best. Looks like you have good air flow out the vents. Take a bow Chris- that is amazing. (IMG:style_emoticons/default/beerchug.gif)
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914forme
post Dec 8 2020, 06:56 PM
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Not done yet (IMG:style_emoticons/default/poke.gif)

See the picture, please close that space up, it will help you more than you think.

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Cracker
post Dec 8 2020, 07:05 PM
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You can "lead a horse..." (IMG:style_emoticons/default/slap.gif)

QUOTE(914forme @ Dec 8 2020, 08:56 PM) *

Not done yet (IMG:style_emoticons/default/poke.gif)

See the picture, please close that space up, it will help you more than you think.
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tygaboy
post Dec 8 2020, 07:35 PM
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Geez... What's that saying? "You can please some of the people..."
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Krieger
post Dec 8 2020, 09:22 PM
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(IMG:style_emoticons/default/smilie_pokal.gif) Excellent work! Looks like better flow than your first test. Wonder what the yarn looks like at 70 mph FANtastic!
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bbrock
post Dec 9 2020, 09:01 AM
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QUOTE(tygaboy @ Dec 8 2020, 02:04 PM) *

Vent test V2. A few things:
- it's actually yarn! I hope you're OK with the color. (IMG:style_emoticons/default/poke.gif)


Well.... (IMG:style_emoticons/default/dry.gif)
I'm sorry, but I don't think you have done your homework.
You really should probably read AND UNDERSTAND this:

Comparison of aerodynamic properties of wool and polyester knitted textiles

And consider following this advice found in a thread Best material for aerodynamic tufting

QUOTE
You might steam iron the yarn straight before using.

I like about 2.5" free length from the tape with a 2" spacing. You can make strips of tufts by wrapping the yarn around a cutting board in 2" spacing and placing tape across the rows of yarn. Them cut with a knife or razor blade.

What about interpretation of the results? How much movement is required to show non-laminar flow? I have heard that small movements of the last 1/3 does not mean anything.


I'm afraid it is back to the drawing board for you (IMG:style_emoticons/default/av-943.gif) Now seriously, why isn't there a peanut emoji? (IMG:style_emoticons/default/confused24.gif)
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tygaboy
post Dec 9 2020, 09:26 AM
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@bbrock - OK, Brent, you're on!

From the study:
"The aerodynamic drag force acting on a circular cylinder clad with knitted wool and polyester textiles has been investigated in wind tunnel experiments in this study."

Now I get it. Citing studies about drag on "cylindrical objects"? (Forget where I could go with that plus "wind tunnel"...)

In this case, the "you're a dick" comment essentially writes itself. (IMG:style_emoticons/default/av-943.gif)

All I can say is that I if I run into any issues with lubrication, I certainly won't be mentioning it in this thread. (IMG:style_emoticons/default/happy11.gif)
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