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With 120 psi, the model climbs out smartly to perhaps 150 feet, with still air flight durations of about 90 secs. This was as expected. The original bottle with about 330 ml capacity seems to fly models for 30 seconds on average. A more carefully designed configuration should result in additional duration. Enclosing the powerplant within a fuselage would be successful as well. In fact, there are at least two new compressed air scale models being built by Marin Aero Club members. I also have a few potential models in mind... |
Copyright 1999, Thayer Syme. All rights reserved