Grams
Senior Member
- Joined
- Oct 4, 2024
- Posts
- 1,066
- Reaction score
- 1,751
- Location
- Texas
- Ram Year
- 2024 & 2015
- Engine
- 6.7 Cummins & 5.7 Hemi
I’m not familiar with aggressive glass-scrubbing treatments….(and not too keen to try it)… but in a related manner…. back in the late ‘60s/early-‘70s…when I was a student pilot… the old timers (WW2 and early airline types)… told us that before flying into bad weather, to take a sheet of newspaper and smear it all-over the radome to reduce “attenuation” of the radar.
(The transmitted-microwaves would be “blocked” (scattered/reduced/attentuated) by the rain on the radome “lens”.
The news-print had an “oil” base which would act similar to the “advertisements) of Rain-X …it would cause the rain to “sheet” -away …reducing the scatter of the transmitted signal…and supposedly create less interference for the reflected-microwaves.
I don’t know much about that, as I never operated older radars much…by the time I advanced to the point of flying airplanes with sophisticated radars the industry had advanced from the old CRT-display AVQ-20’s and Bendix RDR-1’s to modern solid-state and digital color-displays. I only operated the old stuff a couple times and wasn’t willing to tempt Mother-nature too much with that early-technology.
Anyway…that was the rumor those guys spread-around…. and it was evident when you smeared newsprint on the windshields…that oily-ink would make rain on the windshield “sheet-away”…. Much easier to see thru. (You’ve Never Experienced W/S-wiper “Chatter” until you’ve sat behind an early flat-windscreen Hawker or Boeing while taxying-out at Love Field. You can’t even hear your crewmember shouting at you from 3 feet away.
We also had “Rain Repellent” on some airplanes…. a gooey, “milky” hydroscopic/hydrophobic fluid that could be activated with an overhead switch… sprayed the juice on the windscreen to mix with the rain and cause a “sheeting” effect. We almost never used it (if you’ve ever used Rain-X you’ll know why).
BUT…it was useful as a nasty-Trick to get to take-over from your crewmember and do the landing!
JUST BEFORE landing…on a rain-free dry-day approach….reach up to (supposedly) switch on the landing-lights and “accidentally” hit the Other-Side’s Rain-Repellent switch… That would spray the Milk all-over the other guy’s windshield destroying his View!
“SORRY ABOUT THAT! … I HAVE THE CONTROLS”, You shout-out and take-over for the landing.
Anyway, it’s been my experience that wipers that are old/hard and refuse to “flex” and “flip-over” to a “drag” position….are the problem. Replacing them with fresh flexible, soft-rubber types works for me.
(The transmitted-microwaves would be “blocked” (scattered/reduced/attentuated) by the rain on the radome “lens”.
The news-print had an “oil” base which would act similar to the “advertisements) of Rain-X …it would cause the rain to “sheet” -away …reducing the scatter of the transmitted signal…and supposedly create less interference for the reflected-microwaves.
I don’t know much about that, as I never operated older radars much…by the time I advanced to the point of flying airplanes with sophisticated radars the industry had advanced from the old CRT-display AVQ-20’s and Bendix RDR-1’s to modern solid-state and digital color-displays. I only operated the old stuff a couple times and wasn’t willing to tempt Mother-nature too much with that early-technology.
Anyway…that was the rumor those guys spread-around…. and it was evident when you smeared newsprint on the windshields…that oily-ink would make rain on the windshield “sheet-away”…. Much easier to see thru. (You’ve Never Experienced W/S-wiper “Chatter” until you’ve sat behind an early flat-windscreen Hawker or Boeing while taxying-out at Love Field. You can’t even hear your crewmember shouting at you from 3 feet away.
We also had “Rain Repellent” on some airplanes…. a gooey, “milky” hydroscopic/hydrophobic fluid that could be activated with an overhead switch… sprayed the juice on the windscreen to mix with the rain and cause a “sheeting” effect. We almost never used it (if you’ve ever used Rain-X you’ll know why).
BUT…it was useful as a nasty-Trick to get to take-over from your crewmember and do the landing!
JUST BEFORE landing…on a rain-free dry-day approach….reach up to (supposedly) switch on the landing-lights and “accidentally” hit the Other-Side’s Rain-Repellent switch… That would spray the Milk all-over the other guy’s windshield destroying his View!
“SORRY ABOUT THAT! … I HAVE THE CONTROLS”, You shout-out and take-over for the landing.

Anyway, it’s been my experience that wipers that are old/hard and refuse to “flex” and “flip-over” to a “drag” position….are the problem. Replacing them with fresh flexible, soft-rubber types works for me.
Last edited:

