FR2405870A1 - Ensemble de deux voilures tournantes de diametres differents pour giravions - Google Patents
Ensemble de deux voilures tournantes de diametres differents pour giravionsInfo
- Publication number
- FR2405870A1 FR2405870A1 FR7730642A FR7730642A FR2405870A1 FR 2405870 A1 FR2405870 A1 FR 2405870A1 FR 7730642 A FR7730642 A FR 7730642A FR 7730642 A FR7730642 A FR 7730642A FR 2405870 A1 FR2405870 A1 FR 2405870A1
- Authority
- FR
- France
- Prior art keywords
- blades
- helicopter
- rotor head
- rotor
- different lengths
- 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.)
- Withdrawn
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64C—AEROPLANES; HELICOPTERS
- B64C27/00—Rotorcraft; Rotors peculiar thereto
- B64C27/04—Helicopters
- B64C27/08—Helicopters with two or more rotors
- B64C27/10—Helicopters with two or more rotors arranged coaxially
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Aviation & Aerospace Engineering (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Ensemble de voilures tournantes pour giravions. L'ensemble est composé de deux rotors de diamètres nettement différents, co-axiaux, contrarotatifs qui tournent à des vitesses différentes sous un rapport qui peut être constant ou variable. Cette conception équilibre les couples de renversement, les couples et moments gyroscopiques ainsi que les dissymétries aérodynamiques, ce qui permet de supprimer le rotor vertical anti-couple de queue apportant un gain de puissance appréciable (10 à 30 %) avantageusement reporté sur les deux rotors. La différence de diamètres des deux rotors permet de réduire ou supprimer l'interaction aérodynamique du rotor supérieur sur le rotor inférieur, selon la constitution du rotor grand diamètre. L'amplitude du battement vertical des pales de chacun des rotors étant réduit à leur point de croisement, la distance de garde entre les rotors est considérablement diminuée. Le rendement de l'ensemble est amélioré et le pilotage de l'appareil en est facilité.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7730642A FR2405870A1 (fr) | 1977-10-12 | 1977-10-12 | Ensemble de deux voilures tournantes de diametres differents pour giravions |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7730642A FR2405870A1 (fr) | 1977-10-12 | 1977-10-12 | Ensemble de deux voilures tournantes de diametres differents pour giravions |
Publications (1)
Publication Number | Publication Date |
---|---|
FR2405870A1 true FR2405870A1 (fr) | 1979-05-11 |
Family
ID=9196393
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7730642A Withdrawn FR2405870A1 (fr) | 1977-10-12 | 1977-10-12 | Ensemble de deux voilures tournantes de diametres differents pour giravions |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR2405870A1 (fr) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT396453B (de) * | 1984-06-04 | 1993-09-27 | Pichler Hubert | Drehflügelfluggerät |
DE10256916B4 (de) * | 2002-11-28 | 2006-12-28 | Siegfried Pauli | Hubschrauber |
DE10125077B4 (de) * | 2001-05-14 | 2014-02-06 | Siegfried Pauli | Der Hubschrauber |
CN104494822A (zh) * | 2014-12-19 | 2015-04-08 | 四川精石航空科技开发有限公司 | 一种封闭式超轻型双座直升机的板式旋翼头 |
DE10203504B4 (de) * | 2002-01-23 | 2016-06-09 | Siegfried Pauli | Hubschrauber |
CN110963028A (zh) * | 2019-11-11 | 2020-04-07 | 彩虹无人机科技有限公司 | 一种适用于倾转旋翼飞行器的共轴双旋翼 |
CN113741492A (zh) * | 2021-08-06 | 2021-12-03 | 航天时代飞鹏有限公司 | 六旋翼无人机悬停抗风控制方法及装置 |
-
1977
- 1977-10-12 FR FR7730642A patent/FR2405870A1/fr not_active Withdrawn
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT396453B (de) * | 1984-06-04 | 1993-09-27 | Pichler Hubert | Drehflügelfluggerät |
DE10125077B4 (de) * | 2001-05-14 | 2014-02-06 | Siegfried Pauli | Der Hubschrauber |
DE10203504B4 (de) * | 2002-01-23 | 2016-06-09 | Siegfried Pauli | Hubschrauber |
DE10256916B4 (de) * | 2002-11-28 | 2006-12-28 | Siegfried Pauli | Hubschrauber |
CN104494822A (zh) * | 2014-12-19 | 2015-04-08 | 四川精石航空科技开发有限公司 | 一种封闭式超轻型双座直升机的板式旋翼头 |
CN110963028A (zh) * | 2019-11-11 | 2020-04-07 | 彩虹无人机科技有限公司 | 一种适用于倾转旋翼飞行器的共轴双旋翼 |
CN113741492A (zh) * | 2021-08-06 | 2021-12-03 | 航天时代飞鹏有限公司 | 六旋翼无人机悬停抗风控制方法及装置 |
CN113741492B (zh) * | 2021-08-06 | 2023-10-17 | 航天时代飞鹏有限公司 | 六旋翼无人机悬停抗风控制方法及装置 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
IL58218A0 (en) | Rotor-hub assembly for connecting rotor blades to the mast of a helicopter | |
CA2042235A1 (fr) | Engin de vol non habite a rotors contrarotatifs places dans un blindage torique et manoeuvrables de maniere a assurer toutes les commandes de vol necessaires | |
IL40766A (en) | Airfoil shape for flight at subsonic speeds | |
CA954109A (en) | Aerodynamic blade root end attachment | |
JPS6432992A (en) | Propeller for ship | |
GB1331025A (en) | Helicopter rotor blades | |
MY7800257A (en) | Helicopter rotor blades | |
FR2405870A1 (fr) | Ensemble de deux voilures tournantes de diametres differents pour giravions | |
CA1004479A (en) | Jet propulsion engine for subsonic and supersonic speeds | |
CA1020927A (en) | Helicopter rotor blade having a selectively shaped and positioned ramp tab bonded thereto to eliminate blade pitching moment dynamic unbalance | |
GB2028749B (en) | Helicopter main rotor hub construction to limit blade flapping | |
CA923043A (en) | Rotor blade structure | |
GB1333852A (en) | Helicopters | |
MY7800256A (en) | Improvements in or relating to helicopter rotor blades | |
GB1527835A (en) | Torsionally compliant helicopter rotor blade with stability and performace characteristics | |
GB1232037A (fr) | ||
AU534883B2 (en) | Increasing the propulsive efficiency of propeller impeller blade | |
CA1016524A (en) | Helicopter rotor blade | |
FR2397978A1 (fr) | Avion convertible | |
GB1189136A (en) | Rotor Head for a Mechanically Driven Helicopter | |
GB1405164A (en) | Helicopters | |
GB832164A (en) | Reversible propeller | |
IT1176699B (it) | Perfezionamenti nelle eliche di sostentamento per velivoli, atti a migliorare le condizioni di volo | |
JPS5231492A (en) | Jet propelling device in water | |
GB1026458A (en) | Aircraft power plant |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |