US3987981A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Roll control for aircraft, particularly flying barrels, adapted to be driven by means of ducted fans
Assignee: Dornier System GmbH
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Filing: 1975-08-25
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Granted: 1976-10-26
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Expires: 1995-08-25
Abstract
Abstract This invention relates to an improvement in an aircraft driven by a ducted fan and having a displaceable louver at the end of the flow channel for vertical flight, hovering flight, transition, and high-speed flight, the improvement comprising a vertical separating surface dividing the flow channel into two flow channels, and at least one vertical flap, pivotal about a vertical axis, mounted on the forward edge of said separating surface, whereby roll control may be effected.
Inventors
- 👤 Dieter Kook
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 03:59
CPC Classifications
B; B64; B64C; B64C29/00; B64C29/0008; B64C29/0041; B64C29/0066
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
130 words
A roll control for an aircraft capable of gliding, comprising a single shrouded engine mounted in the longitudinal plane of said aircraft, a ducted fan adapted to be driven by said engine, vertical partition means downstream of said fan and forming two separate flow channels, deflection baffle means at the end of each of said flow channels, and roll control means comprising at least one flap means mounted on said partition means downstream of said fan and rotatable about a vertical axis for deflecting part of the flow of one of said flow channels to the other of said flow channels for effecting a rolling moment by increasing the flow over the baffle means of said other flow channel when said baffle means is inclined with respect to the horizontal.
Claim 2
Dependent Claim
130 words
A roll control for an aircraft capable of gliding, comprising a single shrouded engine mounted in the longitudinal plane of said aircraft, a ducted fan adapted to be driven by said engine, vertical partition means downstream of said fan and forming two separate flow channels, deflection baffle means at the end of each of said flow channels, and roll control means comprising at least one flap means mounted on said partition means downstream of said fan and rotatable about a vertical axis for deflecting part of the flow of one of said flow channels to the other of said flow channels for effecting a rolling moment by increasing the flow over the baffle means of said other flow channel when said baffle means is inclined with respect to the horizontal.
Claim 3
Dependent Claim
145 words
A roll control for an aircraft capable of gliding, comprising a single shrouded engine mounted in the longitudinal plane of said aircraft, a ducted fan adapted to be driven by said engine, vertical partition means mounted downstream of said fan and forming two separate flow channels, deflection baffle means at the end of each of said flow channels, and a pair of coupled flap means mounted on said partition means downstream of said fan and having a stationary hub between them, said flap means being together rotatable in the same direction about a vertical axis for altering the flow from said fan in said flow channels to increase the flow in one of said flow channels and over one of said deflection baffle means to effect a rolling moment about the central aircraft axis when said baffle means is inclined with respect to the horizontal.
Claim 4
Dependent Claim
145 words
A roll control for an aircraft capable of gliding, comprising a single shrouded engine mounted in the longitudinal plane of said aircraft, a ducted fan adapted to be driven by said engine, vertical partition means mounted downstream of said fan and forming two separate flow channels, deflection baffle means at the end of each of said flow channels, and a pair of coupled flap means mounted on said partition means downstream of said fan and having a stationary hub between them, said flap means being together rotatable in the same direction about a vertical axis for altering the flow from said fan in said flow channels to increase the flow in one of said flow channels and over one of said deflection baffle means to effect a rolling moment about the central aircraft axis when said baffle means is inclined with respect to the horizontal.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-10-26 | 1980-04-26 | 1980-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-10-26 | 1984-04-26 | 1984-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-10-26 | 1988-04-26 | 1988-10-26 | $7700.00 | Window Closed / Lapsed |