GB754408A - Device for measuring the aerodynamic pitching moments of a short length of a full sized airfoil - Google Patents
Device for measuring the aerodynamic pitching moments of a short length of a full sized airfoilInfo
- Publication number
- GB754408A GB754408A GB28111/54A GB2811154A GB754408A GB 754408 A GB754408 A GB 754408A GB 28111/54 A GB28111/54 A GB 28111/54A GB 2811154 A GB2811154 A GB 2811154A GB 754408 A GB754408 A GB 754408A
- Authority
- GB
- United Kingdom
- Prior art keywords
- aerofoil
- blade
- jet
- secured
- screw
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M9/00—Aerodynamic testing; Arrangements in or on wind tunnels
- G01M9/06—Measuring arrangements specially adapted for aerodynamic testing
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Abstract
754,408. Trimming helicopter rotor blades. DOMAN HELICOPTERS Inc. Sept. 29, 1954 [Nov. 16, 1953], No. 28111/54. Class 4. [Also in Group XIX] A device for measuring the aerodynamic pitching moment of a part of a fullsized aerofoil B as an aid to trimming helicopter rotor blades or the like, comprises a frame 10, 11, 12, 13, 14 carrying at least two spaced means 17, 19, 20, 24 for supporting the aerofoil, having freedom of movement laterally and being angularly adjustable about the mean or approximate aerodynamic centre of the aerofoil, means to adjust angularly at least one of the supporting means, means to measure the turning moment of the aerofoil, a jet mechanism having a nozzle which is short compared with the aerofoil in the direction of its span and is directed towards the leading edge of the aerofoil, and means for moving the jet and supporting means relative to one another to present the jet nozzle at various points of the aerofoil. In Figs. 1 and 2, the aerofoil B is received in a notch 18 in each of two horizontal members 17 suspended on knife edges 21 in line with the aerodynamic centre C, from two rods 19, 20, themselves suspended on knife edges 23 from a horizontal member 24. This member is pivoted on a knife edge 27, in line with edges 23, on a bar 28 secured to a structural member 12 of the frame. A further bar 35 secured to member 12 supports a lever 33, 37, the neutral position of which is determined by a screw 39 and spring 38. The end of lever 33 is connected by rod 32 to the member 24, and is attached to a strain gauge 34. The jet nozzle and assembly is movable on rails so as to present the jet to any narrow portion of the blade. In operation, the blade is angularly adjusted by screw 39 until no lateral force is exerted on the blade by the jet, as indicated by the setting of a pointer 52 on a scale 53, or by a pointer 54 on a scale 55 secured to the jet nozzle. The strain gauge is read to indicate the pitching moment, and a trim tab T is adjusted to give a required value of pitching moment all the way along the blade. In Fig. 4 (not shown), the blade is set in a notch in a semi-cyelindrical member rotatable in the member 17 to adjust the blade in place of screw 39. Fig. 3 (not shown) shows a jig for holding the blade straight.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US754408XA | 1953-11-16 | 1953-11-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB754408A true GB754408A (en) | 1956-08-08 |
Family
ID=22125775
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB28111/54A Expired GB754408A (en) | 1953-11-16 | 1954-09-29 | Device for measuring the aerodynamic pitching moments of a short length of a full sized airfoil |
Country Status (2)
| Country | Link |
|---|---|
| FR (1) | FR1116466A (en) |
| GB (1) | GB754408A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2288772A (en) * | 1994-04-29 | 1995-11-01 | Lee Hughes | Skydiving simulator |
| CN106323586A (en) * | 2016-08-02 | 2017-01-11 | 中国航天空气动力技术研究院 | Test device for lateral jet flows of multiple nozzles |
| CN107036780A (en) * | 2017-04-28 | 2017-08-11 | 甘肃省治沙研究所 | A kind of blowing sand wind tunnel may move semi-automatic multifunction frame of axes |
| WO2023016114A1 (en) * | 2021-08-10 | 2023-02-16 | 中国航天空气动力技术研究院 | Modal test support apparatus and method for using same |
| CN116086756A (en) * | 2023-04-10 | 2023-05-09 | 中国空气动力研究与发展中心低速空气动力研究所 | Ground simulation test method for balancing helicopter whole machine in forward flight state |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109823568B (en) * | 2019-02-01 | 2022-06-03 | 南京乾利合科技有限责任公司 | Automatic measuring system for moment of airplane blade |
| CN112362324B (en) * | 2020-10-30 | 2023-01-24 | 东风商用车有限公司 | Stepping durability test device for stepping shield and test method thereof |
| CN113567083B (en) * | 2021-09-22 | 2022-02-11 | 中国空气动力研究与发展中心低速空气动力研究所 | Multi-component aerodynamic interference characteristic test simulation method for full-motion horizontal tail helicopter |
-
1954
- 1954-09-29 GB GB28111/54A patent/GB754408A/en not_active Expired
- 1954-11-16 FR FR1116466D patent/FR1116466A/en not_active Expired
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2288772A (en) * | 1994-04-29 | 1995-11-01 | Lee Hughes | Skydiving simulator |
| GB2288772B (en) * | 1994-04-29 | 1997-09-24 | Lee Hughes | Skydiving Simulator |
| CN106323586A (en) * | 2016-08-02 | 2017-01-11 | 中国航天空气动力技术研究院 | Test device for lateral jet flows of multiple nozzles |
| CN106323586B (en) * | 2016-08-02 | 2019-01-18 | 中国航天空气动力技术研究院 | Experimental rig for multi-port lateral jet |
| CN107036780A (en) * | 2017-04-28 | 2017-08-11 | 甘肃省治沙研究所 | A kind of blowing sand wind tunnel may move semi-automatic multifunction frame of axes |
| CN107036780B (en) * | 2017-04-28 | 2020-05-26 | 甘肃省治沙研究所 | Movable semi-automatic multifunctional coordinate frame for wind tunnel in wind-sand environment |
| WO2023016114A1 (en) * | 2021-08-10 | 2023-02-16 | 中国航天空气动力技术研究院 | Modal test support apparatus and method for using same |
| CN116086756A (en) * | 2023-04-10 | 2023-05-09 | 中国空气动力研究与发展中心低速空气动力研究所 | Ground simulation test method for balancing helicopter whole machine in forward flight state |
| CN116086756B (en) * | 2023-04-10 | 2023-06-13 | 中国空气动力研究与发展中心低速空气动力研究所 | Ground simulation test method for balancing helicopter whole machine in forward flight state |
Also Published As
| Publication number | Publication date |
|---|---|
| FR1116466A (en) | 1956-05-08 |
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