GB315401A - Steering and propelling device for helicopter - Google Patents
Steering and propelling device for helicopterInfo
- Publication number
- GB315401A GB315401A GB19151/29A GB1915129A GB315401A GB 315401 A GB315401 A GB 315401A GB 19151/29 A GB19151/29 A GB 19151/29A GB 1915129 A GB1915129 A GB 1915129A GB 315401 A GB315401 A GB 315401A
- Authority
- GB
- United Kingdom
- Prior art keywords
- propellers
- pitch
- resultant
- thrust
- variable
- 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
- B64C27/04—Helicopters
- B64C27/12—Rotor drives
- B64C27/16—Drive of rotors by means, e.g. propellers, mounted on rotor blades
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Aviation & Aerospace Engineering (AREA)
- Retarders (AREA)
Abstract
315,401. Oehmichen, E. July 13, 1928, [Convention date]. Helicopters; propelling; steering.-For propelling and steering a helicopter having a single lifting screw or a series of lifting screws with a resultant unbalanced torque, a series of propellers is provided, in s plane passing through the centre of gravity of the machine and perpendicular to the lifting axis, the thrust of which can be varied to produce an appropriate counter torque for varying and maintaining the orientation of the machine and also to give, when required, a resultant thrust to produce translational motion. The propellers may be of variable pitch or driven at variable speeds. Fig. 4 shows diagrammatically two such propellers p<1>, p<2> of variable, pitch driven by belts t' from the main engine Mo, and mounted on arms b<1>, b<2> extending from the body of the machine. The pitches of the two propellers are varied in the same or opposite senses by connections to a differential gear d<1>, d<2>, s, the pinion s being mounted on a shaft having a, lexer lm connected to a bar di for producing variations of pitch in the same direction. Differential variation of pitch is produced by turning a hand-wheel V, a propelling resultant being produced when the thrusts of the two propellers are unequal. A modification is described in which the differential gear varies the speed of the propellers by moving rollers keyed to the propeller shafts across the faces of friction-driving discs. The bar di may be connected also to a rear rudder. Fig. 6 shows a modification in which the pitch-control cables are passed around a drum ta provided with a hand-wheel V on a shaft o which can be moved bodily by a lever l<1>, return springs rs<1>, rs<2> being provided on the cables. An arrangement is described wherein the thrust of a constantly driven propeller is balanced or unbalanced by two variable thrust propellers similar to those already described. Any number of propellers may be used provided they can be controlled to give a balanced or unbalanced resultant.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR315401X | 1928-07-13 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB315401A true GB315401A (en) | 1930-08-14 |
Family
ID=8889603
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB19151/29A Expired GB315401A (en) | 1928-07-13 | 1929-06-21 | Steering and propelling device for helicopter |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB315401A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2006032900A1 (en) * | 2004-09-23 | 2006-03-30 | Torque & Tilt Ltd | Rotorcraft |
-
1929
- 1929-06-21 GB GB19151/29A patent/GB315401A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2006032900A1 (en) * | 2004-09-23 | 2006-03-30 | Torque & Tilt Ltd | Rotorcraft |
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