Aëronautics: an abridgement of aëronautical specifications filed at the Patent Office from A.D. 1815 to A.D. 1891. By Griffith Brewer and Patrick Y. Alexander (1893)
Brewer, Griffith, 1867-1948, Alexander, Patrick Young, 1867-1943, Great Britain. Patent Office · London Taylor and Francis · leaf 89
,which, when driven at a uniform speed, drive the balloonstraight ahead, but by altering the speed of these propellersthe machine may be driven to the right or left. The steering up or down is effected by means of an ad-justable weight, and spirit-levels are employed to indicatethe angle of the… … An elongated body pointed at both ends contains the requisitemachinery and the passengers. 81 Flexible lever-arms extend on either side, and a flexiblespar extends from the tail end of the body. Silk or othersuitable fabric is extended from the arms and along the sparat the tail, thus giving a…
Aeronautics
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
