Skip to main content

Aerodynamic and Chassis Design Evaluation

14:20
52:34
79.6K views

At 14:20 in

Alan Kulwicki's 1992 Underbird: The Actual Hooters 500 Car! (Paul Andrews)

What happens here

Evaluate the car's aerodynamic characteristics and chassis setup relevant to its racing performance. Inspect the rear window braces designed to bend, and the deck lid's function in generating downforce. Understand how the adjustable spoiler allowed for on-track adjustments. Also, learn about the suspension components like the Bilstein shocks and the role of chassis builders like Laughlin and Ronnie Hopkins in the car's design. This technical insight is vital for an accurate restoration.

Goal: Evaluate the car's aerodynamic features and chassis setup.

What they say

Hide

looking at this and I see the center of this back glass is really sucked down. Is that something that was the way you guys did it? >> It's definitely had some abuse along the way because the braces are bent but it is it looks like somebody's been laid on it. But yes, these braces are made to bend and once you go through tech, what you would do is you'd pull them pull them uh usually pull on them and uh this is way excessive right now, but uh to get some sloop in there having uh in this era car having some uh a dish right here was really big. It kind of extended the deck give you more downforce. That's before we knew about downforce to be quite honest. Not compared to what we know now, you know. What other kind of things were built into these cars or this car that you would do after you went through tech? >> Uh, usually uh well, it depends on where you're going. If you're going to Dayton Lake, which is not a Dayton car, you would add you would start shaving the spoiler from day one or from from first day there after after tech. But then here, you would probably slide the spoiler up to try to get up on the deck lid more to raise it up because once you go through the templates, you usually don't do the templates again. But you you'd have the smaller slot when you where you could slide it up the hill a little bit and get it a little higher, things like that. That's before uh because they had gauges went here to set the quarter pound heights, but it didn't have nothing here so you could raise the spool up and make it better. Um yeah, we didn't really pull and push as much as you do, you know, in the later era with these type of cars. You know, you're you would pull and push everywhere because we didn't, you know, our wind tunnel was l we did wind tunnel. We had went to the wind tunnel but it was very limited on what we did and our knowledge was not near as what it is now. You know you look back on on uh you know 10 years ago you know compared to compared to this 30 something years ago it's we know a lot more now. Uh but there wasn't as many things usually chassis things that we did uh that that helped and this is an era where you know air was here and arrow was important but yet chassis chassis setup was more important uh you know for this style of car cuz it you know it's a high off the ground. It didn't you didn't put it on the ground and leave it on the ground. So it's just it it just it had it had to handle you know this had more mechanical u…

Auto-generated from the video audio.