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A02 - Steam LTA - past, present, and future

Steam as LTA lift gas: its advantages and disadvantages. A ground boiler is required for initial filling. Possibility of mounting insulation upon the envelope. The double envelope concept. Advantages of
size; the square/cube law. The "dribble" and "reboiling" flight modes for a steam balloon. Review of previous proposals: Cayley - Erdmann - Papst - Alcock - Giraud - Domen. Our experiments, and
the condensation rates established. Our Giraud-type ground steam generator. Future plans: a large "dribble" balloon, and a "reboiling" balloon carrying a flight boiler. Airship possibilities. Combination with
a steam engine for propulsion. Manoeuvring vane motors. The Besler steam aircraft engine. The steam airship mission: limited but effective.

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