Most MiGs after MiG-19, and Suhois after Su-17 as well...

Hi,

I have not found any speed limits on the wipers, but there is a termal switch that protects the motor from overheating. This switch is set at 266 deg F. When the switch cools, it resets automatically.


bbj

While knocking the 737 wipers, the Airbus A319/20 wipers are just as noisy and clear a smaller amount of the windscreen. Now the 747-400 wipers are much better (quieter).

I have seen wipers used on a 737-400 at around 280 IAS and they went OK, but as someone else has said generally they make lots of noise but thats about it....

Forgive my ignorance,being a humble ground engineer,surely there would never be a need to use windscreen wipers in the cruise.What is the highest altitude you have ever encountered rain?

"The highest altitude you have ever encountered rain?" not sure maybe 10,000ft.

Maybe we dont always want to use the wipers simply to remove rain. Maybe we want to use the wipers for a minute when flying through heavy rain to give the windscreen a clean. It works on my car and if there are no limitations on the wiper then why not?

I remember a few years back, flying a brand new Boeing 737-700 (several days old) into Antigua, there was a storm overhead and tried to turn on the wipers during the approach, nothing happened. The windshield coating did not clear enough rain away for us to see safely to complete the approach, so we had to bug out and wait for the storm to pass and landed without incident, come to find out (after the mechanics looked at it)the wipers weren't hooked up at all... Dang quality control...