{"id":69541,"date":"2025-07-17T09:30:18","date_gmt":"2025-07-17T09:30:18","guid":{"rendered":"https:\/\/www.europesays.com\/us\/69541\/"},"modified":"2025-07-17T09:30:18","modified_gmt":"2025-07-17T09:30:18","slug":"nascar-unveils-a-post-flap-to-keep-cars-grounded-at-drafting-tracks-2","status":"publish","type":"post","link":"https:\/\/www.europesays.com\/us\/69541\/","title":{"rendered":"NASCAR unveils A-Post flap to keep cars grounded at drafting tracks"},"content":{"rendered":"

In development for roughly a year, a Wednesday NASCAR Cup Series rule book update includes the formal introduction and mandating of a new A-post flap for races at Daytona, Talladega and Atlanta designed to keep cars on the ground.<\/p>\n

The flag will make its debut at Daytona next month in the regular season finale Coke Zero 400.<\/p>\n

\"\"<\/p>\n

This is primarily a byproduct of Ryan Preece getting airborne at Daytona in 2023 and 2025, for different reasons each time, but still emblematic of NASCAR\u2019s desire to keep the cars on the ground.<\/p>\n

Dr. Eric Jacuzzi, NASCAR\u2019s vice president of vehicle performance innovation aero, detailed the issue during a podcast appearance with crew chief turned television analyst Steve Letarte in April.<\/p>\n

\u201cWe spent a lot of time looking at this. \u2026 When Ryan\u2019s car crossed from the track, it hit the lip of the bus-stop chicane, which was protruding about 2 inches. So we had a pretty significant tire mark there and a chunk of asphalt missing,\u201d Jacuzzi said of the 2023 race.<\/p>\n

\u201cThe other part \u2026 I went and looked at some helicopter research and when you hover a helicopter over pavement, the engine power is let\u2019s say \u2018100.\u2019 When you move over to grass you need \u2018120\u2019 or \u2018130\u2019 \u2014 I believe it was 30 percent more power. That\u2019s because of that surface. To me, it makes a lot of sense that the grass, we would have lost some of that downforce we had.\u201d<\/p>\n

Thus, the development of this A-post flap, which Jacuzzi told Letarte was in development even before the 2025 Daytona 500 incident. \u00a0<\/p>\n

\u201cIt started out as a concept that wasn\u2019t really viable, and then we had a couple brainstorms and sort of came up with this idea,\u201d Jacuzzi said. \u201cIt proved to be very, very effective.\u201d<\/p>\n

The flap is designed to decrease lift in the early part of the spin and reduce cars getting off all four tires.<\/p>\n

\u201cWe think that the less lift that we can have on the car early in the spin, that\u2019s more tire contact with the ground, more slowing it down, which is all good for us,\u201d Jacuzzi said.<\/p>\n

The flaps will be held down by magnets, which are connected to the flaps via cables. Once the longstanding roof flap on the car is deployed once a car spins, the cable will pull the A-post flap open.<\/p>\n

\"\"\"\"\"\"<\/p>\n

h\/t: https:\/\/x.com\/BoziTatarevic\/<\/p>\n","protected":false},"excerpt":{"rendered":"In development for roughly a year, a Wednesday NASCAR Cup Series rule book update includes the formal introduction…\n","protected":false},"author":3,"featured_media":69110,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[46],"tags":[1406,62,67,132,68],"class_list":{"0":"post-69541","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-nascar","8":"tag-nascar","9":"tag-sports","10":"tag-united-states","11":"tag-unitedstates","12":"tag-us"},"share_on_mastodon":{"url":"https:\/\/pubeurope.com\/@us\/114867878272332664","error":""},"_links":{"self":[{"href":"https:\/\/www.europesays.com\/us\/wp-json\/wp\/v2\/posts\/69541","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.europesays.com\/us\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.europesays.com\/us\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/us\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/us\/wp-json\/wp\/v2\/comments?post=69541"}],"version-history":[{"count":0,"href":"https:\/\/www.europesays.com\/us\/wp-json\/wp\/v2\/posts\/69541\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/us\/wp-json\/wp\/v2\/media\/69110"}],"wp:attachment":[{"href":"https:\/\/www.europesays.com\/us\/wp-json\/wp\/v2\/media?parent=69541"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.europesays.com\/us\/wp-json\/wp\/v2\/categories?post=69541"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.europesays.com\/us\/wp-json\/wp\/v2\/tags?post=69541"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}