Date: Thu, 9 Jan 2020 17:45:14 +0000 (UTC)
From: k7lxc@aol.com
To: towertalk@contesting.com, libbysales@austin.rr.com
Subject: Re: [TowerTalk] Prop Pitch Grease preference or
recommendation
< Which parts do you want to grease? I dont think there was any grease used
when the PP's were in original service - just some sort of oil. (My military PP
manual is packed so I cant look it up quickly.) When in original service in
airplane engines, the PP's <were mounted horizontally but when used in ham
service they were mounted vertically which would allow the oil to drip out. All
of the assemblers I've ever talked to recommended using them dry - no oil - so
no problem with leakage. Since the duty cycles in <ham use are pretty small
compared to their original use, no internal lubrication isnt a big deal. And
they still last for many years.
<Cheers,Steve K7LXCTOWER TECH
## Dont even think about using a PP with out grease. Not with the
electric motor spinning at 4800 rpm...driving planetary gears.
PP is mounted vert. 9600:1 gear redux. Takes 2 mins to rotate the
yagis 360 deg.
Jim VE7RF
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