GB215156A - Improvements in screw propellers - Google Patents

Improvements in screw propellers

Info

Publication number
GB215156A
GB215156A GB773123A GB773123A GB215156A GB 215156 A GB215156 A GB 215156A GB 773123 A GB773123 A GB 773123A GB 773123 A GB773123 A GB 773123A GB 215156 A GB215156 A GB 215156A
Authority
GB
United Kingdom
Prior art keywords
blade
faces
hammered
cross
stiffening ribs
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
GB773123A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB773123A priority Critical patent/GB215156A/en
Publication of GB215156A publication Critical patent/GB215156A/en
Expired legal-status Critical Current

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
    • B64C11/16—Blades
    • B64C11/20—Constructional features
    • B64C11/24—Hollow blades

Landscapes

  • Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

215,156. Leitner, H. March 17, 1923. Screw propellers.-Hollow metal screw propeller blades after being subjected to a normalizing process, are then hammered so that the middle portion of the pressure face has a double curve which is convex at the leading edge and concave for the remainder of the face. The stem is also worked up to form flanges whereby the blade can be held in the boss against centrifugal forces. The sheets are of tapering thickness and have one or more internal stiffening ribs. In addition, cross-members may connect the two faces for stiffening purposes. The blades are formed with main plates b of tapering thickness and a number of laminations d, the former having two parallel internal stiffening ribs h. The faces may be connected by cross-stays consisting of a hollow tubular strut with a rivet j passing therethrough, or by a box-shaped member m<1> with two opposite sides riveted at n<1>. After normalizing, the blade is hammered until the pressure face has the double curve which provides a " Phillips Entry." Specification 181.110 is referred to in the second Provisional Specification.
GB773123A 1923-03-17 1923-03-17 Improvements in screw propellers Expired GB215156A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB773123A GB215156A (en) 1923-03-17 1923-03-17 Improvements in screw propellers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB773123A GB215156A (en) 1923-03-17 1923-03-17 Improvements in screw propellers

Publications (1)

Publication Number Publication Date
GB215156A true GB215156A (en) 1924-05-08

Family

ID=9838649

Family Applications (1)

Application Number Title Priority Date Filing Date
GB773123A Expired GB215156A (en) 1923-03-17 1923-03-17 Improvements in screw propellers

Country Status (1)

Country Link
GB (1) GB215156A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2458975A (en) * 1943-12-09 1949-01-11 Curtiss Wright Corp Rib reinforcing means for propeller blades

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2458975A (en) * 1943-12-09 1949-01-11 Curtiss Wright Corp Rib reinforcing means for propeller blades

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