GB765771A - Improved speed control apparatus for variable-pitch engine-driven propellers - Google Patents
Improved speed control apparatus for variable-pitch engine-driven propellersInfo
- Publication number
- GB765771A GB765771A GB287/55A GB28755A GB765771A GB 765771 A GB765771 A GB 765771A GB 287/55 A GB287/55 A GB 287/55A GB 28755 A GB28755 A GB 28755A GB 765771 A GB765771 A GB 765771A
- Authority
- GB
- United Kingdom
- Prior art keywords
- propeller
- speed control
- turbine
- speed
- electronic circuit
- 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
- B64C11/303—Blade pitch-changing mechanisms characterised by comprising a governor
Landscapes
- Engineering & Computer Science (AREA)
- Aviation & Aerospace Engineering (AREA)
- Control Of Turbines (AREA)
Abstract
765,771. Automatic speed control systems. GENERAL MOTORS CORPORATION. Jan. 5, 1955 [Jan. 20, 1954], No. 287/55. Class 38 (4). [Also in Group XXIX] In a speed control system for a variable-pitch propeller electrical pulses of equal or unequal duration are applied by an electronic circuit to the windings 48, 49, Fig. 1, of armatures 40, 41 mounted on the spindle of a valve 30 which, together with a centrifugally-operated valve 10, controls the flow of pressure fluid to a servomotor 50 for adjusting the blades of the propeller. The electronic circuit comprises a power unit 70, Fig. 2, connected to a D.C. supply 75 and driven by an amplifier 71 controlled by a multivibrator 72, the output of which is modified by a motor circuit 73 to which power is supplied by a rectifier 74 connected with an alternator 76<SP>1</SP> driven by the turbine 62 which drives the propeller shaft. With the propeller speed constant, electrical pulses of equal duration are applied to the windings 48, 49, but during changes in speed the accelerations and decelerations of the turbine will result in pulses of unequal duration being applied. In order to synchronize the speed of the turbine with that of another, the electronic circuit includes a potentiometer P2 the arm of which is controlled by a reversible motor 96 connected to the output of an electronic synchronizer, such as that described in Specification 672,845.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US765771XA | 1954-01-20 | 1954-01-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB765771A true GB765771A (en) | 1957-01-09 |
Family
ID=22132901
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB287/55A Expired GB765771A (en) | 1954-01-20 | 1955-01-05 | Improved speed control apparatus for variable-pitch engine-driven propellers |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB765771A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0392966A1 (en) * | 1989-04-11 | 1990-10-17 | United Technologies Corporation | Propeller speed governor having a derivative inhibit at high flight speeds |
-
1955
- 1955-01-05 GB GB287/55A patent/GB765771A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0392966A1 (en) * | 1989-04-11 | 1990-10-17 | United Technologies Corporation | Propeller speed governor having a derivative inhibit at high flight speeds |
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