The Screw Propeller; An Investigation of Its Geometrical And Physical Properties, And Its Application to the Propulsion of Vessels
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In our eReader you can find the full English version of the book. Read The Screw Propeller; An Investigation of Its Geometrical And Physical Properties, And Its Application to the Propulsion of Vessels Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book The Screw Propeller; An Investigation of Its Geometrical And Physical Properties, And Its Application to the Propulsion of Vessels
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There is another cause which would render very small angles impractica- ble ; it is the great velocity which would be necessary to drive the screw round, thereby developing a large amount of friction in the engine.
From neglecting to take friction into account, this deduction does not agree very well with experiment, as will be seen from the valuable experi- ments made by John Fincham, Esq., of Her Majesty's Dock-yard, Ports- mouth.
When the angle of the screw is constant we have, by last probl...em, the square of the velocity, varying inversely as the length and the fourth power of the radius.
.". «; is a maximum when -r — - is a max.
h r* If r be constant, « is a max., when - is a max.
' ' h Hence, when the radius and pitch are constant, the velocity will increase as the length diminishes.
This property is illustrated by the experiments on Her Majesty's ship Rattler.—See the " Artizan," 1845, page 55.
Ft. in.
ft.
Pitch 11 feet % 3 length 9 diameter velocity 10-088 ., 11 „ 3 „ 9 „ 11-409 „ 11 „ 30 „ 10 „ 10-78 „ 11 „ 2 „ 10 „ „ 10-91 There is a limit to the diminution of the length, in consequence of the increased rotatory motion of the screw developing a large amount of friction in the engine, which is not taken into account in these computations.
What to read after The Screw Propeller; An Investigation of Its Geometrical And Physical Properties, And Its Application to the Propulsion of Vessels?
You can find similar books in the "Read Also" column, or choose other free books by Robert Dawson to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
There is another cause which would render very small angles impractica- ble ; it is the great velocity which would be necessary to drive the screw round, thereby developing a large amount of friction in the engine.
From neglecting to take friction into account, this deduction does not agree very well with experiment, as will be seen from the valuable experi- ments made by John Fincham, Esq., of Her Majesty's Dock-yard, Ports- mouth.
When the angle of the screw is constant we have, by last probl...em, the square of the velocity, varying inversely as the length and the fourth power of the radius.
.". «; is a maximum when -r — - is a max.
h r* If r be constant, « is a max., when - is a max.
' ' h Hence, when the radius and pitch are constant, the velocity will increase as the length diminishes.
This property is illustrated by the experiments on Her Majesty's ship Rattler.—See the " Artizan," 1845, page 55.
Ft. in.
ft.
Pitch 11 feet % 3 length 9 diameter velocity 10-088 ., 11 „ 3 „ 9 „ 11-409 „ 11 „ 30 „ 10 „ 10-78 „ 11 „ 2 „ 10 „ „ 10-91 There is a limit to the diminution of the length, in consequence of the increased rotatory motion of the screw developing a large amount of friction in the engine, which is not taken into account in these computations.
What to read after The Screw Propeller; An Investigation of Its Geometrical And Physical Properties, And Its Application to the Propulsion of Vessels?
You can find similar books in the "Read Also" column, or choose other free books by Robert Dawson to read onlineMoreLess
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