When I ordered my HDX-589 I asked the US Tower structural engineer about
having them add a second thrust bearing and mounting the rotor plate lower
down. He convinced me it wasn't a good idea. The tube at the top is
intended to hold the mast if you ever need to remove the rotor for
maintenance. Adding a second thrust bearing would increase the capacity of
the top section to hold a longer mast, but that would overload the rest of
the tower. So there's not much to be gained with the second TB.
----- Original Message -----
From: "Richard Zalewski" <email@example.com>
To: "Towertalk" <firstname.lastname@example.org>
Sent: Friday, February 03, 2012 2:11 PM
Subject: [TowerTalk] HDX-555 Rotor Shelf
>I want to install an extra rotor shelf in the top section of my HDX-555.
> This will be for the rotor. The existing shelf will be for a second
> bearing. Anyone out there ever done this? It looks like the shelf comes
> from US Tower only with the sides bent over to mount to some exisitng tabs
> that have been welded to the tower legs.
> Tnx es 73
> Richard W7ZR
> *Be joyful in hope, patient in affliction, faithful in prayer*
> TowerTalk mailing list
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