Aircraft of all nations, a new series of photographs (1917)
Woodhouse, Henry, 1884- · New York, C. S. Hammond & company · leaf 15
The twin-motored "Curtiss" seaplane about to start for a flight. This machine, which is especially suited for launching- torpedoes and hunting submarines is equipped with two motors of 100 h. p.
Airships
Internet Archive · The Library of Congress · Public domain (published before 1931). Free to use for anything.
