Always surprised me that helicopters - even with flat screens - that generally go slower than Porsches can have worse windscreen wipers!
Never thought I'd meet an odder wiper than the manifold underpressure driven one on my old Ford Anglia - put yer foot down to overtake in the rain .... and it stopped!
Then I met the Wessex and it's electrical/hydraulic/mechanical wipers - driven by its own electrical pump between the feet of the other pilot, with drive via Bowden cable to the wipers - so any sort of failure would stop it!
Best game was a pump leakage in the rain - guaranteeing that the only pilot who could see where he was going also had his feet swimming in hydraulic fluid......
..... and you were also always certain why Westland never built submarines......