GB1100743A - Improvements in or relating to apparatus for sensing lift - Google Patents
Improvements in or relating to apparatus for sensing liftInfo
- Publication number
- GB1100743A GB1100743A GB16047/65A GB1604765A GB1100743A GB 1100743 A GB1100743 A GB 1100743A GB 16047/65 A GB16047/65 A GB 16047/65A GB 1604765 A GB1604765 A GB 1604765A GB 1100743 A GB1100743 A GB 1100743A
- Authority
- GB
- United Kingdom
- Prior art keywords
- passages
- ports
- foil
- fluid
- pressure
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15C—FLUID-CIRCUIT ELEMENTS PREDOMINANTLY USED FOR COMPUTING OR CONTROL PURPOSES
- F15C1/00—Circuit elements having no moving parts
- F15C1/006—Circuit elements having no moving parts for aeronautics; for rockets (drives, controls); for satellites; for air cushion vehicles; for controlling vessels or torpedoes
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Aviation & Aerospace Engineering (AREA)
- Theoretical Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- Measuring Fluid Pressure (AREA)
- Measuring Arrangements Characterized By The Use Of Fluids (AREA)
Abstract
1,100,743. Aircraft instruments; hydrofoils. BOWLES ENGINEERING CORPORATION. 14 April, 1965 [14 April, 1964], No. 16047/65. Headings B7A and B7W. [Also in Division G3] A system for sensing lift forces acting on an aerofoil or a hydrofoil when in motion comprises a pressure-sensitive device within the foil and arranged to produce an output signal which is a function of the difference between the fluid pressures at two ports in the foil adjacent its leading edge, wherein said pressure sensitive device is a pure fluid amplifier having a power nozzle, at least two fluid-output passages for receiving fluid from said power nozzle, and a pair of control nozzles connected respectively to said two ports through separate passages. A foil 10a is formed with ports 12, 13 which connect through passages 22 and 23 provided respectively at their ends with flow restrictors 24, 27 and 26, 28 and intermediate their ends with metering or restricting orifices 19, 21 incorporated in a supply line 16, 17 from a source of pressure fluid 14. The restrictors in the passages 22 and 23 establish a minimum pressure in the passages which is changed by variation of flow over the ports 12, 13 as by variation in the angle of attack of the foil 10. Source 14 delivers pressure fluid to a nozzle 30 which directs it towards output passages 31, 32 and 33, passages 31 and 33 being connected to a lift indicator 35 or other utilization device. Passage 32 connects back to source 14 or spills overboard. Variation in pressure in passages 22 and 23 resulting from variation in angle of attack of the foil deflects the flow from nozzle 30 to influence or unbalance the pressures in passages 31, 33 to operate device 34. The ports 12 and 13 may be located at different distances from the leading edge and in a further embodiment flexible diaphragms are inserted across ports 12 and 13.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US359758A US3327529A (en) | 1964-04-14 | 1964-04-14 | Lift sensing and measuring system |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1100743A true GB1100743A (en) | 1968-01-24 |
Family
ID=23415159
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB16047/65A Expired GB1100743A (en) | 1964-04-14 | 1965-04-14 | Improvements in or relating to apparatus for sensing lift |
Country Status (2)
Country | Link |
---|---|
US (1) | US3327529A (en) |
GB (1) | GB1100743A (en) |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3452707A (en) * | 1966-11-14 | 1969-07-01 | Us Army | Pure fluid amplifier as stall or shock sensor |
US3470740A (en) * | 1967-02-10 | 1969-10-07 | Rosemount Eng Co Ltd | Lift reserve indicator system |
US3499459A (en) * | 1967-02-17 | 1970-03-10 | Us Army | Flueric stall sensor circuit |
US3580069A (en) * | 1969-06-09 | 1971-05-25 | Us Army | Subsonic fluidic angle-of-attack sensor |
US3642017A (en) * | 1970-07-23 | 1972-02-15 | Us Army | Shock wave sensor |
US3677278A (en) * | 1970-11-25 | 1972-07-18 | Us Navy | Self activated fluidic control for a submerged towed body |
US3978724A (en) * | 1975-12-04 | 1976-09-07 | The United States Of America As Represented By The Secretary Of The Navy | Fluidic angle-of-attack sensor |
US4350314A (en) * | 1980-07-10 | 1982-09-21 | The Board Of Trustees Of Western Michigan University | Wing mounted stall condition detector |
US4468961A (en) * | 1980-10-17 | 1984-09-04 | Berg Lauren V | Fluid direction meter suitable for angle of attack meter for aircraft |
US4559822A (en) * | 1982-04-23 | 1985-12-24 | Huntington Morgan G | Aircraft potential of wing lift instrument and method |
US4549706A (en) * | 1983-06-01 | 1985-10-29 | Rosemount Inc. | Flow data sensor duct system |
US4770032A (en) * | 1987-02-05 | 1988-09-13 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Porous plug for reducing orifice induced pressure error in airfoils |
US10520524B1 (en) * | 2017-02-03 | 2019-12-31 | Aurora Flight Sciences Corporation | System and method for distributed airflow sensing |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR963574A (en) * | 1950-07-17 | |||
US1504785A (en) * | 1918-12-30 | 1924-08-12 | Reynolds John Newberry | Method of and apparatus for indicating the attitude of aircraft |
US2986033A (en) * | 1955-01-31 | 1961-05-30 | Aerotec Ind Inc | Angle of attack instrumentation for aircraft |
US3006187A (en) * | 1955-09-14 | 1961-10-31 | Svenska Aeroplan Ab | Device for measuring aerodynamic angle of attack |
US3122165A (en) * | 1960-09-19 | 1964-02-25 | Billy M Horton | Fluid-operated system |
US3245264A (en) * | 1963-06-18 | 1966-04-12 | Kaplan Kenneth | Miniature dynamic pressure gauge |
-
1964
- 1964-04-14 US US359758A patent/US3327529A/en not_active Expired - Lifetime
-
1965
- 1965-04-14 GB GB16047/65A patent/GB1100743A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
US3327529A (en) | 1967-06-27 |
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