After 5 seasons of owning Allegro, 1971, #1240, I have just observed what seems
to be a hollow area in the keel aft and below the bilge area. I'd just pulled
for the winter and was washing out the bilge and letting the water drain through
the plug hole approximately halfway down the keel on the port side, when the
boatyard manager wandered by and starting thumping my keel. He was curious why
the drain hole was so high up, I said it was because that's where the bilge
bottomed out inside the hull and it was all encapsulated ballast below that, and
then he started thumping. The sounds indicated that forward of the drain hole
the keel is solid from top to bottom, but below the drain hold and aft, it
definitely sounds hollow. (I guess I never thought to thump this area myself!)
The boatyard manager asked how I could be certain that water didn't get into
that void and how to drain it if so to prevent freezing damage. So now I'm
mystified. Is there truly an airspace that low in the keel as it sounds? And how
would one ensure no water has penetrated it? Can anyone help?
to be a hollow area in the keel aft and below the bilge area. I'd just pulled
for the winter and was washing out the bilge and letting the water drain through
the plug hole approximately halfway down the keel on the port side, when the
boatyard manager wandered by and starting thumping my keel. He was curious why
the drain hole was so high up, I said it was because that's where the bilge
bottomed out inside the hull and it was all encapsulated ballast below that, and
then he started thumping. The sounds indicated that forward of the drain hole
the keel is solid from top to bottom, but below the drain hold and aft, it
definitely sounds hollow. (I guess I never thought to thump this area myself!)
The boatyard manager asked how I could be certain that water didn't get into
that void and how to drain it if so to prevent freezing damage. So now I'm
mystified. Is there truly an airspace that low in the keel as it sounds? And how
would one ensure no water has penetrated it? Can anyone help?