GB869632A - Improvements in or relating to aircraft - Google Patents
Improvements in or relating to aircraftInfo
- Publication number
- GB869632A GB869632A GB788158A GB788158A GB869632A GB 869632 A GB869632 A GB 869632A GB 788158 A GB788158 A GB 788158A GB 788158 A GB788158 A GB 788158A GB 869632 A GB869632 A GB 869632A
- Authority
- GB
- United Kingdom
- Prior art keywords
- fan
- louvres
- outlet
- duct
- aircraft
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64C—AEROPLANES; HELICOPTERS
- B64C29/00—Aircraft capable of landing or taking-off vertically, e.g. vertical take-off and landing [VTOL] aircraft
- B64C29/0008—Aircraft capable of landing or taking-off vertically, e.g. vertical take-off and landing [VTOL] aircraft having its flight directional axis horizontal when grounded
- B64C29/0016—Aircraft capable of landing or taking-off vertically, e.g. vertical take-off and landing [VTOL] aircraft having its flight directional axis horizontal when grounded the lift during taking-off being created by free or ducted propellers or by blowers
Landscapes
- Engineering & Computer Science (AREA)
- Aviation & Aerospace Engineering (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
869,632. Direct lift aircraft. BOULTON PAUL AIRCRAFT Ltd. June 9, 1959 [March 11, 1958], No. 7881/58. Class 4. In an aircraft, in which direct lift is provided by a fan system driven by the efflux from one or more jet engines and means, such as louvres at the fan duct outlet, are provided for deflecting the fan discharge forwardly or rearwardly to provide a horizontal thrust component, the effective cross-sectional area of the fan duct increases progressively between the fan and the outlet to avoid loss of thrust during deflection. The lower part of the fan hub is tapered as shown to provide a crosssectional area at the outlet plane of the louvres (which for vertical lift are coned inwardly as shown). which is substantially the same as the cross-sectional area of the duct at the fan. The movement of the louvres simultaneously in the same direction to deflect the airflow, Fig. 3 (not shown), will produce substantially an equivalent cross-sectional area at the louvre outlet. In an alternative embodiment the hub is cylindrical and the outer wall of the duct between the fan and the louvres is flared outwardly or both hub and outer wall may be flared.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB788158A GB869632A (en) | 1958-03-11 | 1958-03-11 | Improvements in or relating to aircraft |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB788158A GB869632A (en) | 1958-03-11 | 1958-03-11 | Improvements in or relating to aircraft |
Publications (1)
Publication Number | Publication Date |
---|---|
GB869632A true GB869632A (en) | 1961-06-07 |
Family
ID=9841582
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB788158A Expired GB869632A (en) | 1958-03-11 | 1958-03-11 | Improvements in or relating to aircraft |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB869632A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3369773A (en) * | 1965-08-12 | 1968-02-20 | Gen Electric | Swept vane louver system |
GB2290062A (en) * | 1994-06-06 | 1995-12-13 | Rolls Royce Plc | Mechanism for operating a cascade of variable pitch thrust vectoring vanes |
EP4361036A1 (en) | 2022-10-28 | 2024-05-01 | AIRBUS HELICOPTERS DEUTSCHLAND GmbH | A rotorcraft with a ducted tail rotor supported by a stator |
-
1958
- 1958-03-11 GB GB788158A patent/GB869632A/en not_active Expired
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3369773A (en) * | 1965-08-12 | 1968-02-20 | Gen Electric | Swept vane louver system |
GB2290062A (en) * | 1994-06-06 | 1995-12-13 | Rolls Royce Plc | Mechanism for operating a cascade of variable pitch thrust vectoring vanes |
GB2290062B (en) * | 1994-06-06 | 1998-05-13 | Rolls Royce Plc | Mechanism for operating a cascade of variable pitch vanes |
EP4361036A1 (en) | 2022-10-28 | 2024-05-01 | AIRBUS HELICOPTERS DEUTSCHLAND GmbH | A rotorcraft with a ducted tail rotor supported by a stator |
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