GB177549A - Improvements in and relating to sighting devices for use on aircraft - Google Patents

Improvements in and relating to sighting devices for use on aircraft

Info

Publication number
GB177549A
GB177549A GB448218A GB448218A GB177549A GB 177549 A GB177549 A GB 177549A GB 448218 A GB448218 A GB 448218A GB 448218 A GB448218 A GB 448218A GB 177549 A GB177549 A GB 177549A
Authority
GB
United Kingdom
Prior art keywords
speed
bar
adjustable
wind
ground
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
GB448218A
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 GB448218A priority Critical patent/GB177549A/en
Publication of GB177549A publication Critical patent/GB177549A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
    • G01C21/00—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00
    • G01C21/20—Instruments for performing navigational calculations

Landscapes

  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Automation & Control Theory (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Indicating Or Recording The Presence, Absence, Or Direction Of Movement (AREA)

Abstract

177,549. Wimperis, H. E. March 13, 1918. Angle-measuring instruments. - Relates to bomb-dropping sights and navigation instruments for aircraft, of the type comprising members adjustable in accordance with the vector quantities of air-speed, wind-speed, and ground-speed, and consists in the combination therewith of a compass and other adjustable members to facilitate the determination of wind-speed and ground speed vector quantities, and for course-steering. The air-speed bar 2 is adjustable in the fore-andaft line of the aircraft, by a hand-wheel 4, relatively to the fixed member 1 in accordance with the known speed in air of the aircraft. The windspeed bar 5 is pivoted to a block 3 on the bar 2 and carries a slider 6 adjustable by a hand-wheel 7 along the graduated wind-speed bar. A drift or ground-speed bar 9 is pivoted by a sleeve 10 to a vertical bar 11 and is slidable through a pillar 8 on the air-speed slider 6. A compass 16 is mounted on the fixed member 1 and has a dial plate 14 on which is marked a wind arrow 15, the dial plate being geared to the wind-speed bar 5 so that the arrow 15 is maintained parallel to that bar. A graduated bearing-ring 13 is mounted above the dial plate, and a clamping device 17 is provided whereby the ring and plate may be clamped or freed for joint or independent movements. A pointer 18 is carried by the member 1 and a second pointer 19 is displaced by angular movements of the bar 9. The vertical bar 11 carries sight members 23 which are adjustable on the bar for the altitude of the machine. Bombdropping foresights 24 are provided on the stem 8. The ground-speed may be determined by means of fixed or adjustable beads 21, 22 on wires 20 carried bv the bar 9. An object on the ground is sighted through the backsight 23 and its time of passage between the beads 21. 22 is a measure of the ground speed. Various ways in which the instrument can be used for course-steering and for wind estimation are described.
GB448218A 1918-03-13 1918-03-13 Improvements in and relating to sighting devices for use on aircraft Expired GB177549A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB448218A GB177549A (en) 1918-03-13 1918-03-13 Improvements in and relating to sighting devices for use on aircraft

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB448218A GB177549A (en) 1918-03-13 1918-03-13 Improvements in and relating to sighting devices for use on aircraft

Publications (1)

Publication Number Publication Date
GB177549A true GB177549A (en) 1922-04-27

Family

ID=9777998

Family Applications (1)

Application Number Title Priority Date Filing Date
GB448218A Expired GB177549A (en) 1918-03-13 1918-03-13 Improvements in and relating to sighting devices for use on aircraft

Country Status (1)

Country Link
GB (1) GB177549A (en)

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