Contributions of Balloon Operations to Research And Development At the Air Force
Contributions of Balloon Operations to Research And Development At the Air Force
Holloman Air Force Base United States Air Force Missile Development Cente
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OF TEST APPARaTU: AND ARP. ~. \GEMENT FIG 6. PHOTOGRAPH OF INFLATED 2. 44 METER BALLOON (24 GORES) 32 FIG 7 PHOTOGRAPH OF METER BALLOON INFLATED 2 (12 GORES) 33 FIG 8. INFLATED 12 GORE BALLOON SHOWING NONSPHERICITY OF CROSS -SECTION 34 the system mass by introducing a lighter gas into the balloon. Using helium, the balloons developed a free lift of $i lbs for the 2. 0 meter balloon and 9^ lbs for the larger one. Then using a lost weight of six(6) and tentlOO lbs, respectively, the resultant dov...mv/ard force, the system's mass, and its dre. G were considerably decreased. This greatly simplified test procedure, calculations, and reduced the probability of acceleroraeter damage due to excessive loads and rebound acceleration. Using this system, the lost weirht could easily be varified, causing impact velocities and Reynolds number to vary in the desired manner. 2) Ballon Rigging and V^eights The balloon rigging consisted of a harness of three 0. 017 inch steel cables, equispaced over the balloon surface, fastened together at the top and meeting at a confluence point below the balloon and supporting the "lost" weight (Fig 5).
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