[C320-list] UK Halsey Mast Centering Method

[Irving Grunes]

UK Halsey has a video on centering a mast. It uses a person in a bosuns
chair with a tape just above the seat. Then moving from side to side placing
a matching tape on each shroud.  Then its a short measurement from the tape
to the deck on each side to determine mast straightness.

This presupposes that the halyard exits the mast at its center.

>From the UK reply below, the answer was that there is insignificant
difference if halyard does not exit from the center.

What correction should be made to compensate for the  2 inch or so offset
that I think the C320 main halyard has from the mast centerline.

Irv Grunes
#851

---------- Forwarded message ----------
From: Butch Ulmer <Butch at ukhalsey.com>
Date: Tue, Jun 9, 2009 at 11:17 AM
Subject: Re: UK-Halsey 'Contact Us' Email from: Irv Grunes
To: igrunes at gmail.com


It does not compensate for a difference such as you described however, I
suspect that the differential would be so small as to be insignificant.

Charles "Butch" Ulmer
UK-Halsey International
175 City Island Ave.
Bronx, NY 10464
Tel: 718-885-2028
Fax: 718-885-9236



On Jun 4, 2009, at 5:53 PM, <igrunes at gmail.com> <igrunes at gmail.com> wrote:

Re video-Center mast over the boat using a bosun chair and tape. Usually the
Halyard does not exit the mast at its center but from a sheave on one side
or the other. How does one compensate for that difference? The video was
excellent in that the system of measurement quite simple and accurate. Irv
Grunes