Bristol through hulls

[G-Bub]

Win and his son are replacing their through hulls and encountered a shocking issue that probably occurred during layup at the factory.  Win was having trouble posting this so I am posting on his behalf.  I had replaced the through hulls on our Bristol of the same vintage and did not encounter a similar issue so not sure how widespread it may be.  His writeup and photos are attached

[Dan Stadtlander]

I would be more inclined to think it was a repair job by someone who had no clue what they were doing then something at the factory. If the boat was cured enough to remove from the mold then it was cured enough for a seacock installation. The other possible explanation may have been a lighting strike. Was this this thru hull grounded?
Dan Stadtlander

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On Apr 4, 2023, at 11:01 AM, 'G-Bub' via Bristol39-40 <bristo...@googlegroups.com> wrote:

Win and his son are replacing their through hulls and encountered a shocking issue that probably occurred during layup at the factory.  Win was having trouble posting this so I am posting on his behalf.  I had replaced the through hulls on our Bristol of the same vintage and did not encounter a similar issue so not sure how widespread it may be.  His writeup and photos are attached

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[Matthew Thomson]

My 1969 Bristol 39 was a 1/2 thick layup. I had 3 original Wilcox Crittenden Hull valves that I was able to lap / grease and retain (Galley Sink Drain, Bilge Pump Overboard, Sanitary Overboard). On every other location I had to replace the Apollo and Grocco ball valves and seacocks that previous owners replaced and didn’t maintain because they were seized and I could get them apart to repair, or even get the parts if I could. I never saw any hull thicknesses of 1/4”. 

 

I would be curious what other later Bristol 40 owners have seen?

VR Matt

Former 1969 B39 Yawl (BLUEMOON)

Current 1983 B45.5 CC Sloop (SILENCE)

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On Tuesday, April 4, 2023, 11:01 AM, 'G-Bub' via Bristol39-40 <bristo...@googlegroups.com> wrote:

Win and his son are replacing their through hulls and encountered a shocking issue that probably occurred during layup at the factory.  Win was having trouble posting this so I am posting on his behalf.  I had replaced the through hulls on our Bristol of the same vintage and did not encounter a similar issue so not sure how widespread it may be.  His writeup and photos are attached

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[Jack]

That is about as scary as it gets. Can't even imagine how that could happen. Was the interior or exterior hull sunk in where it went from 1/2 to 1/4 inch? Did the thruhull sit in a divit in the hull? Even 1/4 inch of glass should not come apart with a yank. When ever I have used a hole saw to create a new thruhole or opened an old one up to replace it the hull has been at least 1/2 inch. Bristol did not use backing plates or even bolt the seacocks in, which would not pass muster now. Istvan Kopar was rebuilding a Tradewind 35 for the 2018 GGR race and on grinding paint in the forepeak broke through to sunlight.  https://koparsailing.com.   He found no glass in the hull there. Just some interior paint and gelcoat on the outside. At least that was above the water line. I guess this is why we carry a liferaft and keep it handy in the lazarette. 

[Win Winthrop]

Hello All, Win here,  yes the through hulls were grounded.

Yesterday I found another spot where it was evident that some hardware was put in and squeezed an inprent into the layup. I removed the binical and the steel plate on the underside of the cockpit had left an 1/8 in. Recess in the layup.  Still plenty strong, but curious.

We did replace the rudder pin and rudder stuffing box and are replacing the binical along with controle and steering cables as well as the chain.  We had a chance and parts on hand from salvage, so my young son will not need to worry about these components for decades.  Soon back in, cont wait to sail her again.  This B 40 now renamed MOTHER OCEAN.

To view this discussion on the web visit https://groups.google.com/d/msgid/bristol39-40/15C5F1C7-1BBD-48CC-9681-987E22C9E13A%40yahoo.com.

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