GB636284A - Improvements in and relating to airspeed indicators for aircraft and to aerial spraying mechanisms controlled therefrom - Google Patents

Improvements in and relating to airspeed indicators for aircraft and to aerial spraying mechanisms controlled therefrom

Info

Publication number
GB636284A
GB636284A GB3271947A GB3271947A GB636284A GB 636284 A GB636284 A GB 636284A GB 3271947 A GB3271947 A GB 3271947A GB 3271947 A GB3271947 A GB 3271947A GB 636284 A GB636284 A GB 636284A
Authority
GB
United Kingdom
Prior art keywords
propeller
motor
relative wind
speed
indicator
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
GB3271947A
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.)
PHILIP WILLIAMSON TUDOR
Pest Control Ltd
Original Assignee
PHILIP WILLIAMSON TUDOR
Pest Control 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 PHILIP WILLIAMSON TUDOR, Pest Control Ltd filed Critical PHILIP WILLIAMSON TUDOR
Priority to GB3271947A priority Critical patent/GB636284A/en
Publication of GB636284A publication Critical patent/GB636284A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P5/00—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft
    • G01P5/02—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring forces exerted by the fluid on solid bodies, e.g. anemometer
    • G01P5/06—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring forces exerted by the fluid on solid bodies, e.g. anemometer using rotation of vanes
    • G01P5/07—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring forces exerted by the fluid on solid bodies, e.g. anemometer using rotation of vanes with electrical coupling to the indicating device
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
    • G01P3/42—Devices characterised by the use of electric or magnetic means

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Catching Or Destruction (AREA)

Abstract

636,284. Air-speed indicators. PEST CONTROL, Ltd., and TUDOR, P. W. Dec. 11, 1947, No. 32719. [Class 97 (iii)] [Also in Group XXXVIII] An airspeed indicator for use in aircraft comprises a propeller exposed to the relative wind and a motor driving the propeller independently of the relative wind, the indicator being responsive to the reaction of the relative wind on the driven propeller. As shown in Fig. 1, the propeller 3 is driven by a constant speed motor 1 which is mounted on trunnions 2 so as to be free to rotate about the axis of the driving shaft in response to the reaction of the relative wind on the driven propeller against the restoring force of a spring 5 connected to a torque arm 4 integral with the motor casing. The air-speed may be indicated mechanically by the rotation of the motor about its shaft or, as shown, means (see Group XXXVIII) responsive to the current supplied to drive the motor may be provided. The indicator may be used to control mechanism for spraying crops (see Group XXXVIII). In another embodiment, the indicator propeller is driven by a constant torque motor so that variations in speed of rotation of the propeller due to the reaction on the propeller of the relative wind serve as a measure of the relative wind. The speed of rotation may be measured by a chronometric device of the kind described in Specification 615,487, [Group XXXVIII].
GB3271947A 1947-12-11 1947-12-11 Improvements in and relating to airspeed indicators for aircraft and to aerial spraying mechanisms controlled therefrom Expired GB636284A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3271947A GB636284A (en) 1947-12-11 1947-12-11 Improvements in and relating to airspeed indicators for aircraft and to aerial spraying mechanisms controlled therefrom

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3271947A GB636284A (en) 1947-12-11 1947-12-11 Improvements in and relating to airspeed indicators for aircraft and to aerial spraying mechanisms controlled therefrom

Publications (1)

Publication Number Publication Date
GB636284A true GB636284A (en) 1950-04-26

Family

ID=10342998

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3271947A Expired GB636284A (en) 1947-12-11 1947-12-11 Improvements in and relating to airspeed indicators for aircraft and to aerial spraying mechanisms controlled therefrom

Country Status (1)

Country Link
GB (1) GB636284A (en)

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