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Flying-Machine
Flying-Machine
William Beeson, of Dillon, Montana Territory US Pat.
376937. Filed Sep. 2, 1887. Issued Jan. 24, 1888 Comments: Curved
airfoiled tensed fabric for mainsail. Curved cross-bar. This William
Beeson very-high hat seems to echo a bit of Thomas Walker
flying machine of 1810. Some of the mechanics demonstrated in the 1804
Cayley glider seem understood by Beeson in his instructive 1887 filing.
The tensed sail seems also to allow some mainsail billow asymmetrical
aeroelasticity. There is upper convexity to the keel form to aid in
getting curved airfoil from the hang glider's tensed sail fabric. The
mainsail is stretched around the formatted keel form to give shape to
the airfoil. The degenerate triangle control frame (DTCF) goes to be a
single down tube before splitting to the aeronaut hold with two down
lines to the basebar of the trapeze. There are adjustment points for
attachment of the DTCF at the keel. The trapeze basebar is a place where
a pilot (he wrote "aeronaut") may control some aerodynamic control
lines.
Note: Recall that the text is more important than the drawings for the
shared instruction; thus aspect ratio certainly may differ from the
drawing, etc. ============================== Notes
on Thomas Walker: Explore his descriptions of experiments. Explore his
1810 treatise. Explore secondary publications of his treatise.
Explore the version of his treatise later published by James Mean in
The Aeronautical Annual, issue 1,1895. Full digital copy of book
digitized by Google
HERE
(9 Mb) The
book contains essays and figures by many early aviation people: Otto
Lilienthal, Wenham In 1810 by publisher Hull, Thomas Walker's A
Treatise on the Art of Flying by Mechanical Means. |