I’ve noticed these before, in F1 during practice sessions, and wondered what was going on. For sure, I surmised they were some manner of data collection devices, but just didn’t know.
Today, watching the F1 practice sessions from Zandvoort, I noticed some cars had them yet again.
So I went surfing on the information superhighway.
As I guessed, they are for data collection, arrays of pito tubes, for measuring airflow, in various areas around the car, the wake behind the front tires, the airflow entering and spilling around the rear wing, etc. A way to prove out the virtual designs, or show where the design doesn’t meet the engineering expectation.
Pretty cool stuff.
Back in the days before wind tunnels and high tech gimcracks and geegaws, they would tape short bits of yarn to the bodywork in a grid pattern, then observe the way they fluttered in the airflow as the car moved around the racecourse.
(Sorry, F1 wants viewers to go watch the video elsewhere, and being on my phone I am too technologically inept to sort out how to simply post a link and compell the forum software to not try and imbed the video. Please do go see it, informative and fascinating.)