GB385074A - Improvements in or relating to variable pitch propellors - Google Patents
Improvements in or relating to variable pitch propellorsInfo
- Publication number
- GB385074A GB385074A GB3124631A GB3124631A GB385074A GB 385074 A GB385074 A GB 385074A GB 3124631 A GB3124631 A GB 3124631A GB 3124631 A GB3124631 A GB 3124631A GB 385074 A GB385074 A GB 385074A
- Authority
- GB
- United Kingdom
- Prior art keywords
- blade
- sleeve
- secured
- pitch
- propeller
- 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
- B64C11/00—Propellers, e.g. of ducted type; Features common to propellers and rotors for rotorcraft
- B64C11/30—Blade pitch-changing mechanisms
- B64C11/32—Blade pitch-changing mechanisms mechanical
- B64C11/34—Blade pitch-changing mechanisms mechanical automatic
- B64C11/346—Blade pitch-changing mechanisms mechanical automatic actuated by the centrifugal force or the aerodynamic drag acting on auxiliary masses or surfaces
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- Aviation & Aerospace Engineering (AREA)
- Braking Arrangements (AREA)
Abstract
385,074. Screw propellers. FAIREY AVIATION CO., Ltd., Cranford Lane, Hayes, Middlesex, and LOBELLE, M. J. O., Scalesclugh, Langley Road, Slough, Bucking- hamshire. Nov. 11, 1931, No. 31246. [Class 114.] In varying the pitch of screw-propeller blades below a predetermined speed the blade is secured to the hub by a tension member which is weak torsionally, the outer end of the weak member being secured to a differential screw sleeve in the blade root. The blade 10 has a recess into which is screwed a sleeve 24 that has an inner screw of different pitch, the inner end of the sleeve 24 has a number of teeth adapted to be engaged by end teeth on a sleeve 27 secured by a flange to the base of the propeller root. A cylindrical member 22 is slotted so as to be weak torsionally and at its inner end is secured by a pin to the socket 23 on the propeller boss. At its outer end it is screwed into the block 24 and carries radial teeth engaged by corresponding teeth on a sleeve 25 also secured at 26 to the blade root. The outer stiffening member 12 of the blade root is held on to the blade proper by a coned nut 12a and carries a flange 15 which is adapted when the propeller blade moves outwardly under centrifugal force to abut against an internal distance nut 16 on the hub socket 14. The blade root carries a block which is connected by links passing through an opening 19 in the hub socket to the pitch controlling gear. At low propeller speeds the flange 15 is clear of its abutment 16 and the blade can then be given a pitch adjustment by overcoming the torsion of the sleeve 22. At higher speeds the flange 15 bears on its abutment 16 and brings into play a frictional resistance to any effort to alter the pitch. The bolts 26 used for securing the sleeves 25 and 27 are unequally spaced so as to provide a varying adjustment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3124631A GB385074A (en) | 1931-11-11 | 1931-11-11 | Improvements in or relating to variable pitch propellors |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3124631A GB385074A (en) | 1931-11-11 | 1931-11-11 | Improvements in or relating to variable pitch propellors |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB385074A true GB385074A (en) | 1932-12-22 |
Family
ID=10320230
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3124631A Expired GB385074A (en) | 1931-11-11 | 1931-11-11 | Improvements in or relating to variable pitch propellors |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB385074A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2553193A (en) * | 1946-08-12 | 1951-05-15 | Fairey Aviat Co Ltd | Rotor blade for rotary wing aircraft |
| US2557220A (en) * | 1945-04-26 | 1951-06-19 | Gazda Antoine | Safety device for rotative sustaining means |
| US2575533A (en) * | 1947-04-16 | 1951-11-20 | Charles M Seibel | Rotor blade mounting and control |
| US2600531A (en) * | 1945-08-17 | 1952-06-17 | Bristol Aeroplane Co Ltd | Rotary wing aircraft |
| US2739656A (en) * | 1952-06-25 | 1956-03-27 | Jr William Heyl Raser | Resilient variable pitch rotor blade mount |
| US3953149A (en) * | 1974-06-17 | 1976-04-27 | General Motors Corporation | Engine cooling fan |
| US4264277A (en) * | 1978-05-26 | 1981-04-28 | The Boeing Company | Redundant rotor blade retention system |
| US4790722A (en) * | 1985-12-18 | 1988-12-13 | M A N Gutehoffnungshutte GmbH | Multi-blade rotor for a windmill-type apparatus |
-
1931
- 1931-11-11 GB GB3124631A patent/GB385074A/en not_active Expired
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2557220A (en) * | 1945-04-26 | 1951-06-19 | Gazda Antoine | Safety device for rotative sustaining means |
| US2600531A (en) * | 1945-08-17 | 1952-06-17 | Bristol Aeroplane Co Ltd | Rotary wing aircraft |
| US2553193A (en) * | 1946-08-12 | 1951-05-15 | Fairey Aviat Co Ltd | Rotor blade for rotary wing aircraft |
| US2575533A (en) * | 1947-04-16 | 1951-11-20 | Charles M Seibel | Rotor blade mounting and control |
| US2739656A (en) * | 1952-06-25 | 1956-03-27 | Jr William Heyl Raser | Resilient variable pitch rotor blade mount |
| US3953149A (en) * | 1974-06-17 | 1976-04-27 | General Motors Corporation | Engine cooling fan |
| US4264277A (en) * | 1978-05-26 | 1981-04-28 | The Boeing Company | Redundant rotor blade retention system |
| US4790722A (en) * | 1985-12-18 | 1988-12-13 | M A N Gutehoffnungshutte GmbH | Multi-blade rotor for a windmill-type apparatus |
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