[Alberg30] Mast Step

[Randy Weatherspoon]

I have been working the problem for some time.  One key aspect is the need 
for a stable A-Frame similar to the one used by the association - see manta 
section-- this is also what Yves had jury-rigged for his repair-- ( in some 
areas like the petroleum industry where drilling rigs were once put 
together with "Ginpole --trucks"  now they use cranes except on the smaller 
rigs- this was a common practice)-----with out the Ginpole - (and I don't 
have the exact number from my notes) the horizontal force at the step or 
shear would be very large. The other element to be considered is that you 
have a 35' lever that if it gets out of alignment will destroy the mast 
step and cabin top very quickly. So a single pole is very dangerous i.e. 
using a spinnaker pole unless it is very calm - the boat is out of the 
water and you have a lot of knowledgeable help------!  It can be done if 
properly guyed--

But in a pre hurricane scenario there is not a lot of time or help so the 
need to do this single-handedly is critical and in conditions different 
than outlined above.

While at the Coconut Grove Yacht Club a few weeks ago I saw a perfect 
implementation -- the boat was originally owned by a man who was a 
machinist and had fabricated the whole thing -- the boat ( a Choey Lee 
35'-40') is on a mooring so I will try to get some pictures to post.

I am also doing a comparative study of engine replacements for my A4 and 
would be willing to post but do not know how to post an Excel spread sheet 
?? I am looking at Yanmar,Westerbeke,Universal,Beta -- and comparing to the 
A4 spec --- looking mainly at three things--Hp, compatible dimensions for 
installation, and eas of service i.e. access to filters etc.  -- this 
should be ready in a few days and would welcome comment --- if you would 
like to get it and we can't post--contact me directly.

Randy Weatherspoon #385
 

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