[Alberg30] Keels A30/Folkboat

[Peter Hay]

Until last year my boat #384 was on the hard beside one of the Whitby built folkboats (Continental Folkboat is one term I have heard).  As Paul said it has an external iron keel and that was evident by the rusting on the surface although is didn't seem to be a large problem.  What I found interesting is as follows.  One morning in early spring I arrived at the yard and noticed that the ballast on my A30 (staying very cold on a relatively warm day) had caused frost to outline its profile on the fiberglass.  I immediately looked over at the Folkboat and voila the profile is virtually identical to the external iron (very high at the forefoot and tapering toward the aft end of the keel but stopping well short of the rudder shoe).  I didn't measure or mark it with anything so I can't say for sure what the exact measurements are.  
I have a copy of Choice Yacht Designs by Richard Henderson (1979).  He reviews the A30 (and Triton).  He has a diagram of the A30 hull lines complete with the ballast outline.  It would appear to extend from just aft of the watertank and decline at about a 10 deg. angle ending about 1.5 to 2.0 feet in front of the rudder shoe where is drops straight down about 8 to 10 inches to the base of the fiberglass hull.  There is also a bottom up profile (Iines).  Because Henderson couldn't get original plans of the Triton from Pearson at the time he wrote the book, he had Carl Alberg draw him a new diagram of the Triton Mark II.  That plan has a slightly different rudder which might have been to apease Pearson.  The A30 plan also shows a squared off rudder.  Perhaps this also reflects Alberg's revised thinking on rudder profile???
I will see if I can get an enlarged copy of the page.  If I can enlarge it properly I can fax a copy to anyone who wants one.  
Peter Hay
Rubicon #384

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