File:Canadian forestry journal (20515795712).jpg

Title: Canadian forestry journal
Identifier: canadianforestry15canauoft (find matches)
Year: [1] (s)
Authors: Canadian Forestry Association
Subjects: Forests and forestry -- Canada Periodicals
Publisher: (Ottawa) : Canadian Forestry Association
Contributing Library: ROM - University of Toronto
Digitizing Sponsor: MSN

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Text Appearing Before Image:
Canadian Foresir)) Journal, November, 1919 437
Text Appearing After Image:
No, this is not a handful of wheat on a lable-iup. it i.â ^ an aviiaj pliotngrapli ot a log boom on the St. Maurice River. Quebec, taken by one of the seaplanes of the St. Maurice Forest Protective Association. The Forestry Journal is informed that by counting the number of logs in a square centimetre of the photograph, the total contents of the boom can be easily and accurately computed. It is declared to be more exact than by any other known method. Several radio telegraph stations should be dotted over the area of flying operations, so that a fire may be reported immediately it is sighted, or a forced landing investigated by a second machine. Undoubtedly every air base should have at least two machines and two pilots, and it is only by this means that abso- lute satisfaction from the work may be ex- pected. SAFETY FOR HUMAN CARGO. No serious-thinking business man should be willing to go into flying extensively unless he can determine what factors are responsible for his safety in the a'lr, and these factors may be grouped the safety of construction and design of the 'plane, the efficiency of the power unit, and the possibility of a safe landing in case of trouble. Manufacturers of efficient aircraft test these planes by acrobatics, which strain all parts of the machine five to ten times greater than they are ever called upon to stand in commercial flying, and the liability through constructional faults is nil, if the machines are cared for by a competent staff. The old danger of fire is also eliminated on a good make of machine, when properly cared for. HIGH FLYING ON ONF. MOTOR. With the best make of motor car, you cannot guarantee a long trip with absolutely no engine trouble, the same thing is true of an aeroplane motor. The gas engine has been greatly im- proved, but is not perfect. To overcome this uncertainty, we must, when using only one motor in a plane, fly at an altitude of four or five thousand feet, which affords an opportun- ity to land on a lake, if necessary, about four miles distant in any direction, this distance being dependent on the direction and strength of the wind. It may be interesting to the uninitiated to note that an airplane operates the same whether the motor is running or not, and can maintain the same speed. The motor does not govern

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