[Alberg30] hull flexing

[Brian and Elaine Timmins]

In my experience, the boat should be sitting on her keel and the stands are only to keep her up right!
Brian  ex#497
  ----- Original Message ----- 
  From: Mike Lehman 
  To: public-list at alberg30.org 
  Sent: Wednesday, September 11, 2002 4:19 PM
  Subject: Re: [Alberg30] hull flexing


  I experienced a similar problem with hull flexing, but on land. The yard put the aft jack stands in the wrong place and put to much weight on them. The result was "oil-canning" around the stands. I made them change the stands...when they wanted to charge me for blocking twice, I threathened to move them myself, we had an argument, they changed the stands, I did not get charged, I do not use that yard any more. The lesson is...when the boat is out for the winter, sight down the hull from bow or stern, and be sure she looks right, if not fix it.

  Mike Lehman 

  "Gilleleje" #505 
  "What is the use of a house if you haven't got a tolerable planet to put it on?" Henry David Thoreau 
  ----Original Message Follows---- 
  From: Gordon LACO 
  Reply-To: Alberg 30 public list 
  To: Alberg 30 public list 
  Subject: Re: [Alberg30] hull flexing 
  Date: Wed, 11 Sep 2002 00:48:28 -0400 
  on 9/11/02 2:26 PM, Dave Terrell at DTERRELL.GWSTAFF.GWNMC at message.nmc.edu 
  wrote: 
  the hull number is 432. the head door does not stick. The bulk heads appear 
  to be securely attached to the inner liner. The deck beam appears to be have 
  been originally encapsulated in fiberglass. If not the fix job was very good 
  and professional. What I am noticing is a flexing of the hull below the 
  waterline sometimes when I encounter a larger wave. 
  >>> gdinwiddie at alberg30.org 09/10/02 05:07PM >>> 
  Dave, 
  You don't say what hull number boat you have. If you have a wooden 
  beam, is it in good shape or starting to sag? If a newer boat, does the 
  head door stick on the overhead? 
  Are your bulkheads still attached tightly all around? 
  Everything flexes a little, but the A30 is a pretty stiffly built boat. 
  What specifically are you noticing? 
  - George 
  Dave Terrell wrote: 
  > 2. I notice that the hull on my boat flexes when I hit a wave sometimes. 
  > Is this normal? I am not sure it is consistent with the A30's reputation 
  > as a s olidly built boat. Am I missing something or do I need to reshape 
  > my thinking on this matter? 
  Hi guys - 
  I have A30 #426 and she exhibits hull flexing as well. The problem is that 
  our boats were heavily glassed up but with no core material in the hull. 
  This means that they are not as stiff as they might be; but on the positive 
  side there is no chance of water destroying the hull via water rotting the 
  core as we get in decks. 
  It is a bad idea to try to bolster the hull with interior stiffening as it 
  is very easy to create hard spots that the hull can then crack around. Best 
  just live with it. 
  Gord Laco 
  Sojourning in Mexico at Fox Studios 
  A30 #426 Surprise 


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