Annual Report of the Board of Regents of the Smithsonian Institution |
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Сторінка 203
It was found in the early experiments that when the planes or hydrofoils were
arranged parallel to the surface of the water , a noticeable irregularity occurred
when changing speed or when traveling in choppy water , due to the effect of the
...
It was found in the early experiments that when the planes or hydrofoils were
arranged parallel to the surface of the water , a noticeable irregularity occurred
when changing speed or when traveling in choppy water , due to the effect of the
...
Сторінка 203
drift , " that is to say , the ratio of the useful vertical component to the head
resistance or horizontal component , is 8 , whereas the best results thus far
obtained with the surface hydroplane type , I believe , is about 6 . In aeroplane
work it is ...
drift , " that is to say , the ratio of the useful vertical component to the head
resistance or horizontal component , is 8 , whereas the best results thus far
obtained with the surface hydroplane type , I believe , is about 6 . In aeroplane
work it is ...
Сторінка 246
So far , etching glass surfaces with hydrofluoric acid has failed to reveal any of
the network of crystalline structure filled in with vitreous material which is
sometimes described as representing the texture of glass . Tearing the surface of
glass by ...
So far , etching glass surfaces with hydrofluoric acid has failed to reveal any of
the network of crystalline structure filled in with vitreous material which is
sometimes described as representing the texture of glass . Tearing the surface of
glass by ...
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General subjects of the annual report | 1 |
National Museum | 13 |
Necrology | 21 |
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