List of Figures
Following Page
Fig. 1. Plastic Balloon for Constant Level Balloon Project............ 4
Fig. 2. Thin, tear-drop, polyethylene balloon....................... 5
Fig. 3. General Mills twenty-foot balloon........................... 5
Fig. 4. Ten-foot appendix attached to a General Mills balloon...... 5
Fig. 5. Two-foot appendix, stiffened, shown on a General Mills
Balloon.......................................................... 5
Fig. 6. General Mills twenty-foot balloon in flight................ 5
Fig. 7. Idealized time-altitude curves for various balloon
control systems................................................... 7
Fig. 8. Manual ballast valve....................................... 7
Fig. 9. Components of Manual Ballast release assembly............. 7
Fig. 10. Manual ballast release assembly.......................... 7
Fig. 11. Automatic ballast valve.................................. 7
Fig. 12. Automatic ballast valve, showing loaded diaphragm......... 7
Fig. 13. Automatic ballast valve.................................. 7
Fig. 14. Minimum Pressure switch.................................. 8
Fig. 15. Ballast reservoir........................................ 10
Fig. 16. Ballast release assembly................................ 10
Fig. 17. Complete ballast release assembly....................... 10
Fig. 18. Coverage of probable balloon paths with four-station.
SCR-658 net....................................................... 12
Fig. 19. Buoyancy vs. altitude for various diameter balloons
(helium).......................................................... 17
Fig. 20. Buoyancy vs. altitude for various diameter balloons
(hydrogen)........................................................ 17
Fig. 21. Calculated net lift for General Mills Inc., balloons..... 18