I am working on each of individual plane. I ran a test with F/A-18C. During take off, there were no water trail, but on other occasion, I can see the trails, especially at 4 and 8 o'clock.
For chopter, none of the wipers work -- Ka-50III (still) does not even have any raindrops on the canopy!
OH-6A and UH-60L, however, have different displays, but essentially, the wiper on the latter does not work. I need to look at the Apache for it worked before.
What about Hind?