Yacht Design - ballast considerations.
Posted: Thu Feb 07, 2019 7:49 pm
I came across this extract in the book listed below. I couldn't help but think that the author had the Investigator in mind.
PRACTICAL BOAT-SAILING: A Concise and Simple Treatise
BY
DOUGLAS FRAZAR,
FORMERLY FOURTH OFFICER OF THE STEAMSHIP "ATLANTIC,"
MASTER OF THE BARK "MARYLAND," AND COMMANDER
OF THE YACHT "FENIMORE COOPER" IN THE
NORTHERN SEAS OF CHINA AND JAPAN.
Copyright, 1879
"Nearly all yachts that are ballasted, when filled with water, will sink; and there have been many ingenious ways devised to prevent this, so that, in case a yacht should be swamped, i.e., completely filled with water, she would yet float, and make a sort of life-preserver to the occupants, and not go to the bottom, and leave them struggling on the surface.
A very ingenious and yet cheap way of obtaining this result is to have built into the wings of the yacht, under the floorings, and in every conceivable place that is out of the way, empty tin or iron six-pound powder-canisters, that seal hermetically, sufficient in number to overcome, by the air they contain and the natural buoyancy of the wood composing the yacht, the weight of the ballast, or the tendency of the same to sink the yacht when filled with water. It will not take a great number of these canisters in quite a large yacht of medium model; for, although the yacht will sink without them, it does not take very much of this confined air to turn the scale, and make it float.
Some yachts are ballasted with lead; and this, if it were not for its cost, is a prime ballast, taking up less space than any other. And some care not for the first cost; for, as is truly said, it is a marketable article, which does not vary much in price: and, even if it should cost quite a sum to ballast one's yacht with lead, it is so much cash on hand, and can always be taken out and sold at a moment's notice. Besides the different kinds of ballast that have been enumerated, there is also the living ballast, that is to say, human beings, whom one can place in different parts of the yacht to trim her in different situations. But this kind of ballast is mostly used in racing, and even then is sometimes apt to "get out of order," and not "work well;" and the writer would advise one to stick to iron, lead, gravel, or sand as superior."
PRACTICAL BOAT-SAILING: A Concise and Simple Treatise
BY
DOUGLAS FRAZAR,
FORMERLY FOURTH OFFICER OF THE STEAMSHIP "ATLANTIC,"
MASTER OF THE BARK "MARYLAND," AND COMMANDER
OF THE YACHT "FENIMORE COOPER" IN THE
NORTHERN SEAS OF CHINA AND JAPAN.
Copyright, 1879
"Nearly all yachts that are ballasted, when filled with water, will sink; and there have been many ingenious ways devised to prevent this, so that, in case a yacht should be swamped, i.e., completely filled with water, she would yet float, and make a sort of life-preserver to the occupants, and not go to the bottom, and leave them struggling on the surface.
A very ingenious and yet cheap way of obtaining this result is to have built into the wings of the yacht, under the floorings, and in every conceivable place that is out of the way, empty tin or iron six-pound powder-canisters, that seal hermetically, sufficient in number to overcome, by the air they contain and the natural buoyancy of the wood composing the yacht, the weight of the ballast, or the tendency of the same to sink the yacht when filled with water. It will not take a great number of these canisters in quite a large yacht of medium model; for, although the yacht will sink without them, it does not take very much of this confined air to turn the scale, and make it float.
Some yachts are ballasted with lead; and this, if it were not for its cost, is a prime ballast, taking up less space than any other. And some care not for the first cost; for, as is truly said, it is a marketable article, which does not vary much in price: and, even if it should cost quite a sum to ballast one's yacht with lead, it is so much cash on hand, and can always be taken out and sold at a moment's notice. Besides the different kinds of ballast that have been enumerated, there is also the living ballast, that is to say, human beings, whom one can place in different parts of the yacht to trim her in different situations. But this kind of ballast is mostly used in racing, and even then is sometimes apt to "get out of order," and not "work well;" and the writer would advise one to stick to iron, lead, gravel, or sand as superior."