Man, I really love that walk-around freedom with my MRC Wireless Cab...it's the greatest thing since Electric Windshield Wipers!
[Before electric windshield wipers became standard in the late 1950's, wipers ran on the vacuum from the engine's intake manifold.]
If you were accelerating or climbing a steep hill using a lot of throttle, the wipers would slow down and sometimes even stop, because the engine was using all the vacuum!
I think the first 12 or 13 cars out of the 27 I've owned since 1952 have all had vacuum wipers. Those were the days!
Here's a typical vacuum motor. The vacuum line from the engine connected to the nipple, and the shaft swept the wiper blade left and right about 150 degrees.
Bad Order...the Old Man