Problems in physics. Derived from military situations and experience (1919)
United States. War Dept. Committee on education and special training, Dodge, Homer Levi, 1887- · [Washington? · leaf 138
he nose of the balloon and opens auto-matically when the gas pressure is excessive. It may also be oper-ated by hand. The type R observation balloon, rigging and basket weigh ap-proximately 1,000 pounds. PROBLEMS18. It is common practice to assume the lift of a hydrogen-filledballoon to be 64.4… … lUl^^ t. & hAk ^ ,.lr Figure 2. U. S. Army Observation Balloon. Type R BALLOONS 113 19. What is the ascensional force in an observation balloon of 37,000 cubic feet capacity? Weight of cordage, car andobserver 1,300 pounds, lift of the gas 64.4 pounds per 1,000cubic feet. 20. What is the…
Physics · Military art and science
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