Any gear with a 50% or better efficiency is NOT self breaking and will require
a break. Even a slightly lower than 50% might (most possible) need a break as
the efficiency will increase with time as the gear will "wear in".
Hans - N2JFS
-----Original Message-----
From: Wilson <infomet@embarqmail.com>
To: John Santillo N2HMM <n2hmm@warwick.net>
Cc: towertalk <towertalk@contesting.com>
Sent: Tue, Jul 14, 2015 1:37 pm
Subject: Re: [TowerTalk] Worm Gears
Hub City touts their helical gear units, at 90+% efficiency vs 60% for
worms.
I
don't know about their resistance to back driving, but at 50-60:1, it
wouldn't
take much of a brake...
WL
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