GB2316980A - Automatic propeller blade control - Google Patents

Automatic propeller blade control Download PDF

Info

Publication number
GB2316980A
GB2316980A GB9618327A GB9618327A GB2316980A GB 2316980 A GB2316980 A GB 2316980A GB 9618327 A GB9618327 A GB 9618327A GB 9618327 A GB9618327 A GB 9618327A GB 2316980 A GB2316980 A GB 2316980A
Authority
GB
United Kingdom
Prior art keywords
blade
propeller blade
stop
blade control
aircraft
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Withdrawn
Application number
GB9618327A
Other versions
GB9618327D0 (en
Inventor
Bernard William Vagg
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 GB9618327A priority Critical patent/GB2316980A/en
Publication of GB9618327D0 publication Critical patent/GB9618327D0/en
Publication of GB2316980A publication Critical patent/GB2316980A/en
Withdrawn legal-status Critical Current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
    • B64C11/30—Blade pitch-changing mechanisms
    • B64C11/32—Blade pitch-changing mechanisms mechanical
    • B64C11/34—Blade pitch-changing mechanisms mechanical automatic

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Toys (AREA)

Abstract

An aircraft or model aircraft propeller blade is either mounted to swivel against a stop, about an axis near its leading edge and extending at 90 degrees to the axis about which the propeller rotates, or the blade is incorporated near the tip of a fixed pitch blade, the concave surface of which acts as a stop. The blade relies upon external air pressure to cause it to swivel. Scimitar-like blades may be used in an electrically powered model aircraft.

Description

Aircrew This invention relates to an airscrew According to the present invention, each blade swivels, by the external air pressure acting upon it, about an axis at 900 to the main engine drive shaft, and along or near to the leading edge of the blade, as in a weathercock.
A stop, as in the function of a door stop, is fitted near each axis. This stops the swivel of the blade, when it is rotated around the mainsbaft by the engine, at a suitable angle for it to screw into the air.
When the aircraft is gliding each blade feathers automatically by the external air pressure acting upon it.
The airscrew is inainly intended for electrically powered model aircraft, allowing the use of large area and scimitar blades.
It also has application to frill size aircraft.
It may also be incorporated near the tip of a conventional fixed pitch blade, utilising the concave surface as the stop.

Claims (2)

Claims
1. A weathercock type aircraft propeller blade, in which its screwing effect and its feathering is actuated by the external air pressure acting upon it.
2. A weathercock type aircraft propeller blade as claimed in claim 1 which is incorporated into a fixed pitch propeller blade.
GB9618327A 1996-09-03 1996-09-03 Automatic propeller blade control Withdrawn GB2316980A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9618327A GB2316980A (en) 1996-09-03 1996-09-03 Automatic propeller blade control

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9618327A GB2316980A (en) 1996-09-03 1996-09-03 Automatic propeller blade control

Publications (2)

Publication Number Publication Date
GB9618327D0 GB9618327D0 (en) 1996-10-16
GB2316980A true GB2316980A (en) 1998-03-11

Family

ID=10799309

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9618327A Withdrawn GB2316980A (en) 1996-09-03 1996-09-03 Automatic propeller blade control

Country Status (1)

Country Link
GB (1) GB2316980A (en)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB193827A (en) * 1922-02-23 1924-03-20 Anton Flettner Improvements relating to propellers, turbines and the like
GB272530A (en) * 1926-06-14 1928-02-16 Maurice Auguste Blain Improvements in variable pitch screws
GB512057A (en) * 1938-01-27 1939-08-29 Marcel Raymond Anet Magloire Improvements in automatically controlled variable pitch air screws
GB596971A (en) * 1944-05-24 1948-01-15 Everel Propeller Corp Improvements in automatic variable pitch propeller
GB1555704A (en) * 1977-10-12 1979-11-14 Griffiths J O Model aircraft propellers
GB1588311A (en) * 1976-10-15 1981-04-23 Bristol Aerojet Ltd Propellers
GB2175351A (en) * 1985-03-26 1986-11-26 Univ Open Aerodynamic/hydrodynamic control devices
GB2233400A (en) * 1989-06-20 1991-01-09 George William James Bell Automatic variable pitch propellor

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB193827A (en) * 1922-02-23 1924-03-20 Anton Flettner Improvements relating to propellers, turbines and the like
GB272530A (en) * 1926-06-14 1928-02-16 Maurice Auguste Blain Improvements in variable pitch screws
GB512057A (en) * 1938-01-27 1939-08-29 Marcel Raymond Anet Magloire Improvements in automatically controlled variable pitch air screws
GB596971A (en) * 1944-05-24 1948-01-15 Everel Propeller Corp Improvements in automatic variable pitch propeller
GB1588311A (en) * 1976-10-15 1981-04-23 Bristol Aerojet Ltd Propellers
GB1555704A (en) * 1977-10-12 1979-11-14 Griffiths J O Model aircraft propellers
GB2175351A (en) * 1985-03-26 1986-11-26 Univ Open Aerodynamic/hydrodynamic control devices
GB2233400A (en) * 1989-06-20 1991-01-09 George William James Bell Automatic variable pitch propellor

Also Published As

Publication number Publication date
GB9618327D0 (en) 1996-10-16

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)