[Alberg30] Alberg 30 center of gravity

[chrishardy]

I was absolutly wrong!  (first time since lunch) Bob Johns is right 
Chapell describes that method for a rule of thumb for the lateral plane. 
I dug out my Chapell and he also has a rule of thumb for c.g. he states 
"As a "rule of thumb" it is assumed that the center of gravity of the 
hull structure(planking, keel, deadwood, stem, sternpost, frames, 
floorsdeck-beams, decking, bulkheads, cabin trunk, cabin floorand cabin 
joinerwork) is at the middle of the overall length. As a matter of fact 
this assumption is not over an inch or two out in normal sailing 
hulls,excepting deck-houses (such as used in motor-sailers) from 
consideration. Since this is the case it is customary to calculate on 
this basis and to reckon on the heavy weights, such as engines, full 
tanks, lighting plant, batteries, icebox, stove, winches and windlass, 
anchor, spars and large deck structures, as the items of weight 
controlling trim which must be counterbalanced by ballast." Don't know 
if this is a help.... but it is food for thought.  Best way is too leave 
the trailer axels unbolted and move them until you get about 10% tongue 
wt...    
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.alberg30.org/pipermail/public-list-alberg30.org/attachments/20020422/20fedc24/attachment-0008.htm>