US3877665A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuselage configuration
Assignee: Vereinigte Flugtechnische Werke Fokker GmbH
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Filing: 1973-03-16
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Granted: 1975-04-15
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Expires: 1993-03-16
Abstract
Abstract A fuselage configuration for aircraft flying at high subsonic speeds is constructed of a first portion defined by a portion of the surface of a respective three-dimensional, spindle-shaped geometrical construction, the major axis of which is large relative to the minor axis, and a second portion defined by a portion of the surface of a respective three-dimensional, spindle-shaped geometrical construction, the major axis of which is also large relative to the minor axis. The two portions are arranged with respect to one another so that the area of the combined cross sections of the portions continuously increases in the direction of the longitudinal axis of the fuselage from each end until it reaches a maximum at a point between the ends.
Inventors
- 👤 Rolf Riccius
- 👤 Herbert Sadowski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 08:56
CPC Classifications
B; B64; B64C; B64C1/00; B64C29/00; B64C29/0008; B64C29/0041; B64C29/0075; B64C2001/0045
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
167 words
A fuselage for high subsonic speed aircraft, comprising two elongated fuselage portions which are arranged one above the other in longitudinal direction, said upper portion having a surface of an approximately circular cross section and said lower portion having a surfaCe of a cross section which is approximately that of an ellipse having a horizontally oriented major axis, said fuselage portions being arranged such that the circular surface of said upper portion and the elliptical surface of said lower portion mutually intersect each other throughout a substantial part of the length of the fuselage, the maximum dimension of said major axis of said lower portion, in the region of the forward section of the fuselage, being greater than the maximum diameter of said upper portion in said forward section, the total cross-sectional area of both portions increasing continuously in longitudinal direction from the forward end of the fuselage until it reaches a maximum and thereafter decreases continuously in longitudinal direction toward the aft end of the fuselage.
Claim 2
Dependent Claim
167 words
A fuselage for high subsonic speed aircraft, comprising two elongated fuselage portions which are arranged one above the other in longitudinal direction, said upper portion having a surface of an approximately circular cross section and said lower portion having a surfaCe of a cross section which is approximately that of an ellipse having a horizontally oriented major axis, said fuselage portions being arranged such that the circular surface of said upper portion and the elliptical surface of said lower portion mutually intersect each other throughout a substantial part of the length of the fuselage, the maximum dimension of said major axis of said lower portion, in the region of the forward section of the fuselage, being greater than the maximum diameter of said upper portion in said forward section, the total cross-sectional area of both portions increasing continuously in longitudinal direction from the forward end of the fuselage until it reaches a maximum and thereafter decreases continuously in longitudinal direction toward the aft end of the fuselage.
Claim 3
Dependent Claim
38 words
A fuselage as defined in claim 1 wherein said lower portion has a forward end which extends beyond that of the forward end of said upper portion, said forward end of said lower portion having a pointed nose.
Claim 4
Dependent Claim
29 words
A fuselage as defined in claim 2 wherein said lower portion starts out with a slim, pointed parabolic shape and said upper portion starts out with an elliptical shape.
References Cited (Backward Citations)
US3030051A
Cited
US3476336A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-14 | 1978-10-14 | 1979-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-14 | 1982-10-14 | 1983-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-14 | 1986-10-14 | 1987-04-15 | $7700.00 | Window Closed / Lapsed |