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November 27, 2021, 11:34:30 PM *
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Author Topic: Plank - Fiberglass added stiffness  (Read 103 times)
Breizhglace
Newbie

Posts: 15


« on: November 15, 2021, 09:43:53 AM »

Hi group,
I apologize if the topic was already covered. (I know Warren was looking for the info a while back)

I would like to know how much stiffness is going to be added by wrapping fiberglass on the plank.

For now, I plan to wrap the entire plank, plus an additional 4 feet center section, with a 4" overlap in the bottom section.

Current deflection of the plank is 45 mm (1"3/4) with skippers weight

Thanks a lot,
Nic
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Bob Gray
Class Member
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Posts: 194


« Reply #1 on: November 15, 2021, 08:33:29 PM »

It will probably stiffen it 3 or 4 pounds per inch.
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Breizhglace
Newbie

Posts: 15


« Reply #2 on: November 19, 2021, 08:54:22 PM »

Thanks a lot Bob!
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wnethercote
Class Member
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Posts: 110


« Reply #3 on: November 23, 2021, 01:35:51 PM »

I am probably too late to stop you, but 1 3/4 inches deflection under your weight is the recommended standard deflection for a plank.  Why do you want to make it stiffer?  I may make your DN harder to sail, although some do like a twitchy boat.
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