GB158029A - Improvements in screw propeller blades - Google Patents

Improvements in screw propeller blades

Info

Publication number
GB158029A
GB158029A GB2520219A GB2520219A GB158029A GB 158029 A GB158029 A GB 158029A GB 2520219 A GB2520219 A GB 2520219A GB 2520219 A GB2520219 A GB 2520219A GB 158029 A GB158029 A GB 158029A
Authority
GB
United Kingdom
Prior art keywords
curve
blade
convex
edge
section
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
GB2520219A
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.)
PIERRE ADRIEN LIONEL ANSPACH
Original Assignee
PIERRE ADRIEN LIONEL ANSPACH
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 PIERRE ADRIEN LIONEL ANSPACH filed Critical PIERRE ADRIEN LIONEL ANSPACH
Priority to GB2520219A priority Critical patent/GB158029A/en
Publication of GB158029A publication Critical patent/GB158029A/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
    • B64C11/18—Aerodynamic features

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Toys (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

158,029. Anspach, P. A. L. Oct. 14, 1919. Screw - propeller blades, more particularly for aeroplanes, are made of special cross-section to facilitate their movement through the fluid. The curve ab of the blade section constitutes the main impact surface and is made slightly convex. The leading edge of the blade is formed of a curve fg of small angle of incidence and a curve ag of large angle of incidence. The air displaced by the surface ab reacts on the surface bcd, which is at first slightly convex, and then concave towards the edge d of the blade. A convex curve fe is provided at the rear face of the leading edge, followed by a curve ed, which is mainly convex but has a slightly concave portion adjacent to the edge d. The blade near the axis of rotation is practically symmetrical on both sides, but becomes less symmetrical and thinner towards the tip. The part cd of the impact surface is tangential at d to the general direction of motion of the section.
GB2520219A 1919-10-14 1919-10-14 Improvements in screw propeller blades Expired GB158029A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2520219A GB158029A (en) 1919-10-14 1919-10-14 Improvements in screw propeller blades

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2520219A GB158029A (en) 1919-10-14 1919-10-14 Improvements in screw propeller blades

Publications (1)

Publication Number Publication Date
GB158029A true GB158029A (en) 1921-01-14

Family

ID=10223872

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2520219A Expired GB158029A (en) 1919-10-14 1919-10-14 Improvements in screw propeller blades

Country Status (1)

Country Link
GB (1) GB158029A (en)

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