Compound aerostat of controllable altitude

Details Compound aerostat of controllable altitude Compound aerostat of controllable altitude

1978-12-15

1980-08-05

Barefoot, Galen L.

Aeronautics and astronautics

Aircraft control

Airship control

55 70, 252372, 568840, B64B 162

Patent

active

042158346

ABSTRACT:
A compound aerostat employing a primary lifting mixture of helium and methanol in a first enclosure and a secondary lifting mixture of ammonia in a second enclosure. Both enclosures are contained within a single envelope. The methanol in the primary enclosure gradually condenses out as the altitude increases yielding a decreasing lift with altitude up to the stratosphere to provide passive altitude stability to the system. An absorbent, metallic lithium is provided within a separate container and connected to controllably absorb the ammonia and thereby control the displacement of the secondary enclosure. The process is reversible with the application of heat by means of propane combustion or solar heating. Other absorbents are LiNO.sub.3, LiCl and CaCl.sub.2. This controllable displacement system can compensate for solar superheat and snow and ice accumulation and facilitate long endurance flights, especially in the troposphere.

REFERENCES:
patent: 1097201 (1904-05-01), Upson
patent: 1755359 (1930-04-01), Moses
patent: 2730626 (1956-01-01), Varney
patent: 3315441 (1967-04-01), Hutton et al.
patent: 3432122 (1969-03-01), Flickinger
patent: 3531064 (1970-09-01), McCuthchan
patent: 4012016 (1977-03-01), Davenport
Bailor et al., "Comprehensive Inorganic Chemistry," Pergamon Press, 1973, . 346-348, 360.

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