This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1903 Excerpt: ...boat is submerged. It is very doubtful that accurate results could be obtained, unless in very still water, with a range-finder. But granting that he knows that the iron-clad to be attacked is exactly one mile 300 yards off, and that the torpedo is to be fired at 300 yards range, how is it to be ascertained that the ...
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1903 Excerpt: ...boat is submerged. It is very doubtful that accurate results could be obtained, unless in very still water, with a range-finder. But granting that he knows that the iron-clad to be attacked is exactly one mile 300 yards off, and that the torpedo is to be fired at 300 yards range, how is it to be ascertained that the submerged boat has run precisely one mile? Spinning logs are notoriously inaccurate over short distances. If the distance run is to be settled by the revolutions of her propeller, then she must in the first instance be carefully calibrated, and after all, any currents in the water would upset all calibrations. But these facts do not cover the whole ground. So far it has been found impossible to construct a perfectly trustworthy compass, even for a steam or oil-propelled submarine boat. In an electrically propelled boat there is so much free magnetism flying about that no compass is of any use whatever. It is to be remembered that the standard compass in an ordinary steel ship stands on the bridge or on a tripod high above the hull; but in the submarine boat the compass is inside--within so to speak the very body of a magnet with all sorts of consequent and inconsequent poles. So entirely untrustworthy and impractic-The able is steering by compass, that resort has been had in France Gyroscope to a totally different instrument, namely the gyroscope. If a heavy wheel be set spinning on a horizontal axis, it will resist any force tending to alter the plane in which it is revolving. That is the reason why a bicycle does not upset. If now, we set a heavy vertical wheel spinning in a submarine boat, the axis being at right angles to the keel, and if, furthermore we hang the wheel in gimbals then a prolongation of the axis may be used just as a compass ...
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Add this copy of Submarine Navigation Past and Present; Volume 2 to cart. $22.29, new condition, Sold by Ingram Customer Returns Center rated 5.0 out of 5 stars, ships from NV, USA, published 2022 by Legare Street Press.
Add this copy of Submarine Navigation Past and Present; Volume 2 to cart. $33.45, new condition, Sold by Ingram Customer Returns Center rated 5.0 out of 5 stars, ships from NV, USA, published 2022 by Legare Street Press.
Add this copy of Submarine Navigation Past and Present; Volume 2 to cart. $35.34, new condition, Sold by Ria Christie Books rated 5.0 out of 5 stars, ships from Uxbridge, MIDDLESEX, UNITED KINGDOM, published 2022 by Legare Street Press.
Add this copy of Submarine Navigation Past and Present; Volume 2 to cart. $46.22, new condition, Sold by Ria Christie Books rated 5.0 out of 5 stars, ships from Uxbridge, MIDDLESEX, UNITED KINGDOM, published 2022 by Legare Street Press.