The horizontal rudders of submarines

Title (Dublin Core): The horizontal rudders of submarines
Subject (Dublin Core): en Technology; en Submarines
Article Title and/or Image Caption (Dublin Core): Flapping Her Under-Water Wings
extracted text (Extract Text): ONE rudder is not enough for a
submarine; it must have horizon-
tal as well as lateral steering ma-
chinery to assist in keeping on an
even keel when running submerged.
In the early under-water boats th
horizontal bow rudders—hydroplanes
as they are called—showed above the
water when the boat was running on
the surface instead of below.

But it was found that the waves
pounded the rudders unmercifully,
and so in later types they are ar-
ranged to be always submerged. The
hydroplanes fold back into the super-
structure of the submarine. Prop-
erly set, they'd be seen edgeways.

The boat in our
picture has the ap-
pearance of flap-
ping her wings be-
cause she is about

to fold them.
Contributor (Dublin Core): Keystone View Co. (Image copyright)
Language (Dublin Core): eng
Temporal Coverage (Dublin Core): Interwar period
Date Issued (Dublin Core): 1919-07
Is Part Of (Dublin Core): Popular Science Monthly, v. 95, n. 1, 1919
pages (Bibliographic Ontology): 35
Rights (Dublin Core): Public domain (Google digitized)
Source (Dublin Core): Google Books
Archived by (Dublin Core): Davide Donà; Marco Bortolami (editor)
Spatial Coverage (Dublin Core): United States of America