Aeroplane construction and operation; including notes on aeroplane design and aerodynamic calculation, materials, etc. A comprehensive illustrated manual of instruction for aeroplane constructors, aviators, aero-mechanics, flight officers and students. Adapted either for schools or home study (1918)
Rathbun, John B · Chicago : Stanton and Van Vliet Co. · leaf 57
f the Aeroplane. Cour-tesy of Flying. oO MILITARY AEROPLANES of its altitude the effective range of vision is still furtherincreased. At a fair height the observer can easily detecta submarine even w^hen submerged to a considerabledepth, a feat impossible when near the sea level. Fordisclosing the… … Fig. 9-a. Curtiss JN Twin Motor Biplane. Observer Is Seated in Front. gible can float indefinitely at one point, it must be doneat an altitude that is safely out of range of the enemyguns, and this is usually at a point where observation isa difficult proposition. It does not take long to get…
Airplanes
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