GB894594A - Improvements in or relating to a rotor blade pitch control mechanism for helicopter aircraft - Google Patents
Improvements in or relating to a rotor blade pitch control mechanism for helicopter aircraftInfo
- Publication number
- GB894594A GB894594A GB37239/58A GB3723958A GB894594A GB 894594 A GB894594 A GB 894594A GB 37239/58 A GB37239/58 A GB 37239/58A GB 3723958 A GB3723958 A GB 3723958A GB 894594 A GB894594 A GB 894594A
- Authority
- GB
- United Kingdom
- Prior art keywords
- blade
- pitch
- hub
- rotor shaft
- axis
- 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
- B64C27/00—Rotorcraft; Rotors peculiar thereto
- B64C27/54—Mechanisms for controlling blade adjustment or movement relative to rotor head, e.g. lag-lead movement
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Aviation & Aerospace Engineering (AREA)
- Transmission Devices (AREA)
- Toys (AREA)
Abstract
894,594. Helicopters. VYZKUMNY A ZKUSEBNI LETECKY USTAV. Nov. 19, 1958 [Nov. 29, 1957], No. 37239/58. Class 4. A helicopter comprises a hub on a rotor shaft, at least two blades having shafts connected to the hub through universal joints including axes offset from the rotor shaft axis and parallel thereto, each blade being angularly displaceable about its longitudinal axis, a member surrounding the rotor shaft and movable from a position concentric therewith to a position eccentric thereto, levers connected one to each blade shaft, and a link for each blade, the links being connected to the member at positions offset from the rotor shaft axis and connected to the levers at positions offset from the said axes of the universal joints, so that when cessation of power supplied to the rotor shaft causes the blades to move angularly about the said axes of the universal joints, the levers effect a change in blade pitch. Fig. 1 shows a rotor hub 1 in which is journalled on axis Z-Z, a universal joint member 7. The shaft 2 of a rotor blade is attached to member 7 through a pitch change bearing and a flapping axis. The pilot controls the blade pitch by displacing a member 6 vertically for collective pitch change, and horizontally for cyclic pitch change. A link 4 (see also Fig. 3) is pivoted at one end to member 6 by a joint 5, and at its other end to a lever 3 on the blade shaft by a joint 8, there being one link for each blade. If member 6 is held stationary relative to the hub, the forward movement of the blade about its drag hinge Z-Z, which occurs on engine failure and loss of driving torque, causes a decrease in blade pitch which completely or partly alters the pitch to that suitable for autorotation. Specification 648,777 is referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CS894594X | 1957-11-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB894594A true GB894594A (en) | 1962-04-26 |
Family
ID=5456582
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB37239/58A Expired GB894594A (en) | 1957-11-29 | 1958-11-19 | Improvements in or relating to a rotor blade pitch control mechanism for helicopter aircraft |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB894594A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112228724A (en) * | 2020-09-21 | 2021-01-15 | 中船重工中南装备有限责任公司 | Precise pitching device with quick response |
-
1958
- 1958-11-19 GB GB37239/58A patent/GB894594A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112228724A (en) * | 2020-09-21 | 2021-01-15 | 中船重工中南装备有限责任公司 | Precise pitching device with quick response |
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