GB521868A - Improvements in or relating to propelling or impelling apparatus of the axial flow type - Google Patents

Improvements in or relating to propelling or impelling apparatus of the axial flow type

Info

Publication number
GB521868A
GB521868A GB3469538A GB3469538A GB521868A GB 521868 A GB521868 A GB 521868A GB 3469538 A GB3469538 A GB 3469538A GB 3469538 A GB3469538 A GB 3469538A GB 521868 A GB521868 A GB 521868A
Authority
GB
United Kingdom
Prior art keywords
propeller
blades
blade
propellers
degrees
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
Application number
GB3469538A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Napier Turbochargers Ltd
Original Assignee
D Napier and Son Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by D Napier and Son Ltd filed Critical D Napier and Son Ltd
Priority to GB3469538A priority Critical patent/GB521868A/en
Publication of GB521868A publication Critical patent/GB521868A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H5/00—Arrangements on vessels of propulsion elements directly acting on water
    • B63H5/07—Arrangements on vessels of propulsion elements directly acting on water of propellers
    • B63H5/08—Arrangements on vessels of propulsion elements directly acting on water of propellers of more than one propeller
    • B63H5/10—Arrangements on vessels of propulsion elements directly acting on water of propellers of more than one propeller of coaxial type, e.g. of counter-rotative type
    • 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
    • B64C11/46—Arrangements of, or constructional features peculiar to, multiple propellers
    • B64C11/48—Units of two or more coaxial propellers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
    • B64D35/00—Transmitting power from power plants to propellers or rotors; Arrangements of transmissions
    • B64D35/04—Transmitting power from power plants to propellers or rotors; Arrangements of transmissions characterised by the transmission driving a plurality of propellers or rotors
    • B64D35/06—Transmitting power from power plants to propellers or rotors; Arrangements of transmissions characterised by the transmission driving a plurality of propellers or rotors the propellers or rotors being counter-rotating

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Ocean & Marine Engineering (AREA)
  • Other Liquid Machine Or Engine Such As Wave Power Use (AREA)

Abstract

521,868. Screw propellers and impellers. NAPIER & SON, Ltd., D., and WILKINSON, G. S. Nov. 29, 1938, No. 34695. [Class 114] [Also in Group XXVI] In apparatus for pumping, or for propelling aircraft or watercraft, comprising two coaxial screw propellers or impellers lying adjacent to one another, rotated simultaneously in opposite directions, and each having blades which project a substantial distance radially from a hub, the blades are so angularly spaced apart that, in one or more relative rotational positions, when the blade A<1> of one propeller axially eclipses a blade B of the other propeller, the remaining blade or blades B<1>, B<2> of the second propeller are partly, and at least some of them wholly, visible between the blades A, A<2>, A<3> of the first propeller. Other examples illustrated in the Specification include (i) a two-bladed propeller used with a three-bladed propeller; (ii) two four-bladed propellers, one with blades equally spaced apart at angles of 90 degrees, and the other with blades at angles of 45 degrees and 135 degrees; (iii) two three-bladed propellers either or both of which have blades separated by unequal angles such as 100, 110, 120, 130 and 140 degrees. Of this last kind, Fig. 7 shows two propellers in which, when the blade K of the second propeller is eclipsed by the blade J of the first propeller, the blades K<1> and K<2> of the second propeller are likewise eclipsed by the blades J<1>, J<2> of the first propeller.
GB3469538A 1938-11-29 1938-11-29 Improvements in or relating to propelling or impelling apparatus of the axial flow type Expired GB521868A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3469538A GB521868A (en) 1938-11-29 1938-11-29 Improvements in or relating to propelling or impelling apparatus of the axial flow type

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3469538A GB521868A (en) 1938-11-29 1938-11-29 Improvements in or relating to propelling or impelling apparatus of the axial flow type

Publications (1)

Publication Number Publication Date
GB521868A true GB521868A (en) 1940-06-03

Family

ID=10368806

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3469538A Expired GB521868A (en) 1938-11-29 1938-11-29 Improvements in or relating to propelling or impelling apparatus of the axial flow type

Country Status (1)

Country Link
GB (1) GB521868A (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2419787A (en) * 1941-04-09 1947-04-29 Muffly Glenn Aircraft engine and propeller unit
GB2175651A (en) * 1985-05-30 1986-12-03 Blyakhman Basya Petrovna Contra-rotating air screw propellers
FR2586130A1 (en) * 1985-08-09 1987-02-13 Gen Electric REDUCTION OF THE NOISE OF THE PROPELLERS OF AN AIRCRAFT
GB2211558A (en) * 1987-10-26 1989-07-05 Deutsche Forsch Luft Raumfahrt Bladed rotor
US4883240A (en) * 1985-08-09 1989-11-28 General Electric Company Aircraft propeller noise reduction
GB2239905A (en) * 1989-11-02 1991-07-17 Deutsche Forsch Luft Raumfahrt Aeroplane propeller
WO2005044662A1 (en) * 2003-10-31 2005-05-19 Advanced Creative Engineering Ltd. Aircraft power assembly and aircraft provided with such an assembly
GB2482333A (en) * 2010-07-30 2012-02-01 Ge Aviat Systems Ltd Aircraft propeller
WO2019016171A1 (en) 2017-07-21 2019-01-24 Promarin Propeller Und Marinetechnik Gmbh Propeller for a water vehicle

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2419787A (en) * 1941-04-09 1947-04-29 Muffly Glenn Aircraft engine and propeller unit
GB2175651A (en) * 1985-05-30 1986-12-03 Blyakhman Basya Petrovna Contra-rotating air screw propellers
GB2179706B (en) * 1985-08-09 1990-04-18 Gen Electric Improvements in or relating to aircraft propellers
GB2179706A (en) * 1985-08-09 1987-03-11 Gen Electric Aircraft propeller noise reduction
US4883240A (en) * 1985-08-09 1989-11-28 General Electric Company Aircraft propeller noise reduction
FR2586130A1 (en) * 1985-08-09 1987-02-13 Gen Electric REDUCTION OF THE NOISE OF THE PROPELLERS OF AN AIRCRAFT
GB2211558A (en) * 1987-10-26 1989-07-05 Deutsche Forsch Luft Raumfahrt Bladed rotor
GB2211558B (en) * 1987-10-26 1992-07-08 Deutsche Forsch Luft Raumfahrt Propeller
GB2239905A (en) * 1989-11-02 1991-07-17 Deutsche Forsch Luft Raumfahrt Aeroplane propeller
WO2005044662A1 (en) * 2003-10-31 2005-05-19 Advanced Creative Engineering Ltd. Aircraft power assembly and aircraft provided with such an assembly
GB2482333A (en) * 2010-07-30 2012-02-01 Ge Aviat Systems Ltd Aircraft propeller
CN102372086A (en) * 2010-07-30 2012-03-14 通用电气航空***有限公司 Aircraft propeller
WO2019016171A1 (en) 2017-07-21 2019-01-24 Promarin Propeller Und Marinetechnik Gmbh Propeller for a water vehicle
DE102017116516B3 (en) 2017-07-21 2019-01-24 Promarin Propeller Und Marinetechnik Gmbh Propeller for a watercraft
US11358692B2 (en) 2017-07-21 2022-06-14 Promarin Propeller Und Marinetechnik Gmbh Propeller for a water vehicle

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