GB372378A - Improvements in and connected with screw propellers - Google Patents

Improvements in and connected with screw propellers

Info

Publication number
GB372378A
GB372378A GB33556/30A GB3355630A GB372378A GB 372378 A GB372378 A GB 372378A GB 33556/30 A GB33556/30 A GB 33556/30A GB 3355630 A GB3355630 A GB 3355630A GB 372378 A GB372378 A GB 372378A
Authority
GB
United Kingdom
Prior art keywords
blade
leading edge
roughenings
screw propellers
screw
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
GB33556/30A
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.)
EDMUND VICTOR TILFER
Stone J and Co Ltd
J Stone and Co Ltd
Original Assignee
EDMUND VICTOR TILFER
Stone J and Co Ltd
J Stone and Co 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 EDMUND VICTOR TILFER, Stone J and Co Ltd, J Stone and Co Ltd filed Critical EDMUND VICTOR TILFER
Priority to GB33556/30A priority Critical patent/GB372378A/en
Publication of GB372378A publication Critical patent/GB372378A/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
    • B63H1/00—Propulsive elements directly acting on water
    • B63H1/02—Propulsive elements directly acting on water of rotary type
    • B63H1/12—Propulsive elements directly acting on water of rotary type with rotation axis substantially in propulsive direction
    • B63H1/14—Propellers
    • B63H1/18—Propellers with means for diminishing cavitation, e.g. supercavitation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H1/00—Propulsive elements directly acting on water
    • B63H1/02—Propulsive elements directly acting on water of rotary type
    • B63H1/12—Propulsive elements directly acting on water of rotary type with rotation axis substantially in propulsive direction
    • B63H1/14—Propellers
    • B63H1/26—Blades
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H1/00—Propulsive elements directly acting on water
    • B63H1/02—Propulsive elements directly acting on water of rotary type
    • B63H1/12—Propulsive elements directly acting on water of rotary type with rotation axis substantially in propulsive direction
    • B63H1/14—Propellers
    • B63H1/28—Other means for improving propeller efficiency

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Steroid Compounds (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
  • Rotary Pumps (AREA)

Abstract

372,378. Screw propellers. STONE & CO., Ltd., J., Deptford, London, and TELFER, E. V., 12, Mosley Street, Newcastle-on-Tyne. Nov. 7, 1930, No. 33556. [Class 114.] The driving faces of screw propeller blades are formed with roughenings at or near the leading edge to reduce the velocity of water flow at this point and thus to prevent the formation of negative pressures. The blade a has roughening grooves or serrations b formed near the leading edge c, these being shallow at the leading edge, gradually increasing in coarseness and then gradually fading into the smooth surface of the blade. Similar roughenings may also be provided on the back of the blade.
GB33556/30A 1930-11-07 1930-11-07 Improvements in and connected with screw propellers Expired GB372378A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB33556/30A GB372378A (en) 1930-11-07 1930-11-07 Improvements in and connected with screw propellers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB33556/30A GB372378A (en) 1930-11-07 1930-11-07 Improvements in and connected with screw propellers

Publications (1)

Publication Number Publication Date
GB372378A true GB372378A (en) 1932-05-09

Family

ID=10354466

Family Applications (1)

Application Number Title Priority Date Filing Date
GB33556/30A Expired GB372378A (en) 1930-11-07 1930-11-07 Improvements in and connected with screw propellers

Country Status (1)

Country Link
GB (1) GB372378A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2589423A1 (en) * 1985-11-04 1987-05-07 Weldon Thomas Propeller operating in a liquid medium
US4846629A (en) * 1986-05-19 1989-07-11 Usui Kokusai Sangyo Kabushiki Kaisha Blades for high speed propeller fan
US4859150A (en) * 1986-05-19 1989-08-22 Usui Kokusai Sangyo Kabushiki Kaisha Blades for low speed propeller fan
US4869644A (en) * 1986-03-22 1989-09-26 Usui Kokusai Sangyo Kabushiki Kaisha Blades for propeller fan
US5209644A (en) * 1991-01-11 1993-05-11 United Technologies Corporation Flow directing element for the turbine of a rotary machine and method of operation therefor
EP2725235A1 (en) * 2012-10-24 2014-04-30 Siemens Aktiengesellschaft Differentially rough airfoil and corresponding manufacturing method
CN109050883A (en) * 2018-08-07 2018-12-21 深圳市边锋智驱科技有限公司 propeller
WO2023124378A1 (en) * 2021-12-29 2023-07-06 北京三快在线科技有限公司 Propeller and aircraft

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2589423A1 (en) * 1985-11-04 1987-05-07 Weldon Thomas Propeller operating in a liquid medium
US4869644A (en) * 1986-03-22 1989-09-26 Usui Kokusai Sangyo Kabushiki Kaisha Blades for propeller fan
US4846629A (en) * 1986-05-19 1989-07-11 Usui Kokusai Sangyo Kabushiki Kaisha Blades for high speed propeller fan
US4859150A (en) * 1986-05-19 1989-08-22 Usui Kokusai Sangyo Kabushiki Kaisha Blades for low speed propeller fan
US5209644A (en) * 1991-01-11 1993-05-11 United Technologies Corporation Flow directing element for the turbine of a rotary machine and method of operation therefor
EP2725235A1 (en) * 2012-10-24 2014-04-30 Siemens Aktiengesellschaft Differentially rough airfoil and corresponding manufacturing method
CN109050883A (en) * 2018-08-07 2018-12-21 深圳市边锋智驱科技有限公司 propeller
WO2023124378A1 (en) * 2021-12-29 2023-07-06 北京三快在线科技有限公司 Propeller and aircraft

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