Actually, Goodyear has already issued a public statement to the effect they would not be bringing any rain tires to Watkins Glenn this year. I did not see any reason for their decission in the release which I received, only that the tires would not be available to the teams this trip to The Glenn.
With that in mind, I doubt the teams would bother bringing cars set up with wipers, defroster fans and taillights as they won't have the rain tires to run on anyhow.
And yes Tony, they did have wipers set up on the cars, they use airfoils on the arms to keep the wiper blade on the windshield.
The proto-type sports cars that run LeMans, Daytona, Sebring and other tracks run lots faster (over 200 mph at LeMans) than the Cup cars at Watkins Glenn and have no trouble keeping the wiper blades in touch with the windshield.
Heck, my old BMW's came from the factory with those airfoils on the wiper arm to keep the blades on the glass at high speed and they do their job very well.
