GB656833A - Improvements in or relating to direct lift aircraft - Google Patents
Improvements in or relating to direct lift aircraftInfo
- Publication number
- GB656833A GB656833A GB30797/46A GB3079746A GB656833A GB 656833 A GB656833 A GB 656833A GB 30797/46 A GB30797/46 A GB 30797/46A GB 3079746 A GB3079746 A GB 3079746A GB 656833 A GB656833 A GB 656833A
- Authority
- GB
- United Kingdom
- Prior art keywords
- blade
- plates
- blades
- cams
- moved vertically
- 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
- B64C27/58—Transmitting means, e.g. interrelated with initiating means or means acting on blades
- B64C27/59—Transmitting means, e.g. interrelated with initiating means or means acting on blades mechanical
- B64C27/615—Transmitting means, e.g. interrelated with initiating means or means acting on blades mechanical including flaps mounted on blades
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T50/00—Aeronautics or air transport
- Y02T50/30—Wing lift efficiency
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Aviation & Aerospace Engineering (AREA)
- Transmission Devices (AREA)
- Retarders (AREA)
- Toys (AREA)
Abstract
656,833. Helicopters. STALKER, E. A. Oct. 16, 1946, No. 30797. Convention date, Nov. 2, 1945. [Class 4] In order to allow a helicopter rotor to operate at an advance ratio greater than unity, i.e. with a translational velocity (Va) exceeding the blade tip peripheral speed (Vp), the blades are automatically adjusted about their spanwise axes during rotation to ensure that positive lift is generated by each blade when retreating. As shown, each blade 3 carries a trailing edge flap 12, the angles of incidence #, #, of the blade and flap respectively being varied during each revolution in accordance with the curves 14, 16 shown in Fig. 10. The pitch control mechanism comprises ring cams 31, 50, Figs. 14 and 15, operating the blades and flaps through links 32, 52 respectively. Adjustment of the contour of the cams may be effected by radially-movable plates 60 provided with appropriately shaped slots 62, 64, the plates 60 being operated by a ring 67 moved vertically by a screw rod 69 and connected to the plates by arms 66. The disc 65 carrying the plates 60 is mounted on a balljoint 72, about which it may be tilted in any direction ; the plate may also be moved vertically by a rod 78.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US656833XA | 1945-11-02 | 1945-11-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB656833A true GB656833A (en) | 1951-09-05 |
Family
ID=22064412
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB30797/46A Expired GB656833A (en) | 1945-11-02 | 1946-10-16 | Improvements in or relating to direct lift aircraft |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB656833A (en) |
-
1946
- 1946-10-16 GB GB30797/46A patent/GB656833A/en not_active Expired
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