Invention Grant
- Patent Title: Additional systems and methods for long endurance airship operations using a free-flying tethered airship system
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Application No.: US15050291Application Date: 2016-02-22
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Publication No.: US09611025B2Publication Date: 2017-04-04
- Inventor: Stephen B. Heppe
- Applicant: Stephen B. Heppe
- Applicant Address: US OR Hood River
- Assignee: STRATOSPHERIC AIRSHIPS, LLC
- Current Assignee: STRATOSPHERIC AIRSHIPS, LLC
- Current Assignee Address: US OR Hood River
- Agent Fabian Vancott; Jeffrey Riddle
- Main IPC: B64B1/50
- IPC: B64B1/50 ; B64B1/00 ; B64C37/02 ; B64B1/04

Abstract:
In one example, a free-flying tethered airship system includes an upper airship adapted to tailor its lift and drag, a lower airship adapted to tailor its lift and drag, and a tether connecting the upper airship to the lower airship such that the upper airship is at least one kilometer above the lower airship. The upper airship is configured to be equiliberally buoyant, while carrying the tether, in a first altitude range. The lower airship is configured to be equiliberally buoyant in a second altitude range, the first altitude range being higher than the second altitude range. A method for stationkeeping of a free-flying tethered airship system is also provided.
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