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1905 Engine &
Propellers 
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Wrights did not build a new motor for their 1905 Flyer 3. According to Orville: "The
[1904] motor, propellers, and other parts of the machinery were used in the machine of
1905."In late 1905, the Wrights developed the parabolic cross-section bent-end
propellers that, when producing thrust, bent into a straight shape, and producing a
combined 210 pounds of thrust.
Due to wear polishing the cylinders during 1904 and 1905, the 1904 motor was producing up
to 21 horsepower. This motor was restored under Orville's direction in 1947.
To replace the parts that had been borrowed for the 1928 restoration of the 1903 engine,
Orville borrowed the crankshaft from the 1904 test engine a made other parts
anew. The rebuilt
engine and the original propellers are now on the restored 1905 Flyer 3 displayed at
Carillon Park, Dayton, OH.
References:
- Wright, 1921.
- McFarland, 1953, p 1214-1215.
- Lippincott, 1987, pp 79-82; 86.
- Orville Wright, deposition in Montgomery vs. the United States, 2 Feb 1921
- McFarland, Marvin W. (ed) The papers of Wilbur and Orville Wright. McGraw-Hill Book Co.,
New York, 1953, p 1214-1215.
- Lippincott, Harvey H. Propulsion System of the Wright Brothers. In Wolko, Howard S.
(editor), The Wright Flyer, an Engineering Perspective. The Smithsonian Institution Press,
1987, pp 79-82; 86.
[Submitted by Joe W. McDaniel]
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The Wright "bent-end" propellers became a distinguishing
feature on all their aircraft produced between 1905 and 1915.
A bent-end prop installed on a Wright Model A in
1910.
The Wrights used the same engine in both the 1904 Flyer 2 and the 1905 Flyer 3.
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