Peter Brock has become a blogger! Sometimes referred to as the Energizer Bunny, Brock continues to delight us with his designs, insights and stories.
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April 24, 2019 April 11, 2019 April 3, 2019
My thoughts on Nissan’s 50th Anniversary 370Z
Who built the first Cobra, and where?
Why wasn’t the Shelby – DeTomaso P70 ever finished?
Hey Peter, It’s great to experience the revival of questions and considerations regarding the various designs and the effects thereof.
Ok, but if the fences worked so well. How come they were not continued. Even in the Can-Am series you didn’t see the them except on the McLarens. Porches didn’t have them, neither did the L&M Lola. And you don’t see them on any other Sports Prototype cars. Today you see all kinds of “flow control” devices on cars. But you don’t see nose to tail fences. That’s why I was wondering if there was some issue with them. The “tunnel” F1 cars were stopped because there was stability issues and they to “flat bottom” cars that made the issues go away and worked better as well.
If you want to have some fun, head down to Hillbank motors with a bunch of Chaparral photos in your hands. Then look at the Cobra 289 roadster, the Daytona coupe, the coupe and roadster version of the Corvette Grand Sport and then your photos and ask yourself, what is going on here?
Why was the Daytona top speed faster than the Cobra roadster and the Grand Sport roadster top speed faster than the Grand Sport coupe?
That’s just for openers. Look at the photo of the Chaparral “sucker” car and ask how come the LAP TIME of this car was so fast that McLaren got it banned from competition?
Fun and games
I have always looked to Jim Hall and Colin Chapman as the masters. The rest have just used that groundwork to improve their designs.
Would the exaggerated dorsal fin on LMP cars be a modern equivalent?BRE
The dorsal fins might add some directional stability but it does not focus the air flowing over the body to create downforce…PB
Any thoughts specific to the longitudinal fences the original post asks about?
It was a very successful design (still valid today) that only went out of favor when McLaren quit because Porsche’s 917Ks had a power advantage that put the McLarens on the trailer. The 917s didn’t use the design because with their power advantage they didn’t have to. No one else used the design because, as with the McLarens, it wouldn’t have been enough to overcome the 917K’s power. PB
Along with the TransAm it was a great era and we probably will never see such good racing again. This was not the last time Porsche screwed up a good series. Thanks for the info.