GB824670A - Speed indicator for airplanes - Google Patents

Speed indicator for airplanes

Info

Publication number
GB824670A
GB824670A GB2158856A GB2158856A GB824670A GB 824670 A GB824670 A GB 824670A GB 2158856 A GB2158856 A GB 2158856A GB 2158856 A GB2158856 A GB 2158856A GB 824670 A GB824670 A GB 824670A
Authority
GB
United Kingdom
Prior art keywords
air
shaft
speed
pointer
link
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
GB2158856A
Inventor
Jiri Darbujan
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.)
Vyzkumny A Zkusebni Letecky Ustav AS
Original Assignee
Vyzkumny A Zkusebni Letecky Ustav AS
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 Vyzkumny A Zkusebni Letecky Ustav AS filed Critical Vyzkumny A Zkusebni Letecky Ustav AS
Priority to GB2158856A priority Critical patent/GB824670A/en
Publication of GB824670A publication Critical patent/GB824670A/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
    • G01P5/14—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring differences of pressure in the fluid
    • G01P5/16—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring differences of pressure in the fluid using Pitot tubes, e.g. Machmeter

Landscapes

  • Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Fluid Pressure (AREA)

Abstract

824,670. Air-speed indicators. VYZKUMNY A ZKUSEBNI LETECKY USTAV. July 12, 1956, No. 21588/56. Class 69 (1). An aircraft air-speed indicator includes transmission mechanism for converting indicated air speed derived from a pitot tube to true air speed, by effectively multiplying it by the air density as obtained from measurements of air pressure and temperature. As shown, the differential pressure from the pitot tube acts on a pressure-sensitive bellows 1 coupled via a shaft 3 and toothed segment 17 and pinion 18 to a pointer 15 showing " indicated air speed." Shaft 3 is also coupled to a shaft 5, toothed sector 19, pinion 20 and pointer 16, via a link 4 pivoted to an arm 6 of fixed length on the shaft 3 and rotatable about this pivot against a spring 9 to vary the effective distance of pivot 9a (mounted on spring 9) from the axis of shaft 5, and hence the transmission ratio between shafts 3 and 5. The rotation of the link 4 is effected through members 8 and 7 by the action of an evacuated vessel 13 responsive to the air pressure and a capsule 14 connected to an air thermometer 14a constructed and coupled together so that the movement of link 11 is proportional to the change in logarithm of the air density; the result is stated to be that the effective arm at 9a is substantially proportional to air density within the desired density range so that pointer 16 indicates true air speed.
GB2158856A 1956-07-12 1956-07-12 Speed indicator for airplanes Expired GB824670A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2158856A GB824670A (en) 1956-07-12 1956-07-12 Speed indicator for airplanes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2158856A GB824670A (en) 1956-07-12 1956-07-12 Speed indicator for airplanes

Publications (1)

Publication Number Publication Date
GB824670A true GB824670A (en) 1959-12-02

Family

ID=10165433

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2158856A Expired GB824670A (en) 1956-07-12 1956-07-12 Speed indicator for airplanes

Country Status (1)

Country Link
GB (1) GB824670A (en)

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