Image from page 9 of "Scientific American Volume 89 Number 10 (September 1903)" (1903)
Identifier: scientific-american-1903-09-05
Title: Scientific American Volume 89 Number 10 (September 1903)
Year: 1903 (1900s)
Authors:
Subjects: scientific steam thread feet transformer tbe apparatus american sewing machine scientific american mineral waters hertzian waves horse power small quantity turbine yacht primary winding sulphuric acid viscid matter
Publisher:
View Book Page: Book Viewer
About This Book: Catalog Entry
View All Images: All Images From Book
Click here to view book online to see this illustration in context in a browseable online version of this book.
Text Appearing Before Image:
altitude of the airship. The inflator is also placed at the car and is in theform of a fan actuated by hand. By means of thiscontrivance the constant distension of the gas vesselisinsured. In the event of a lower pressure causingthe gas to contract inside the balloon, by bringing this shaft from the motor to the bow of the keel, is sup-ported upon adequate bearings. The pinion at the endof this propeller shaft meshes in a spur wheel. As themotor is balanced to 1,500 revolutions per minute, andit is only desired to drive the tractor at 300 revolutionsper minute at full speed, a ratio of 5 to 1 drop is made;i.e., the spur wheel is five times the size of the drivingpinion. The motor is provided only with two speeds,one forward and one reverse. It is furthermore pro-vided with a free wheel clutch so that the tractor maybe thrown out of action without stopping the engine,and the racing of the latter under such conditions canof course be prevented by retarding the ignition leverin the car.
Text Appearing After Image:
EQUILATERAL HYPERBOLA SHOWING THE LAW 07 TBOTTINO IMPROVEMENT pump into action air is forced into the balloon toreplace the lost gas. The employment of this pumpdispenses with the necessity of placing a ballonettewithin the gas bag, which principle has been adoptedin some air vessels built on similar lines to the Spencercraft. The hand pump has the further advantage ofenabling the aeronaut to vary the weight of the wholeairship. Should the vessel continue to rise above thedesired point, through the lifting energy of the gas,by pumping air into the balloon the gas can be dis-placed, escaping through the automatic valves, and solessen the specific gravity of the whole, causing thevessel to be slightly heavier than the air and thus toexert a downward motion until the desired equilibriumis attained. It will be seen that this ingenious systemalso obviates the necessity of opening the main valveto insure descent. ;... The automatic valves are so made as to open whena pressure of gas equal t
Note About Images
Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.
Orignal From: Image from page 9 of "Scientific American Volume 89 Number 10 (September 1903)" (1903)
No comments:
Post a Comment