GB794505A - Improvements in or relating to aircraft - Google Patents

Improvements in or relating to aircraft

Info

Publication number
GB794505A
GB794505A GB36352/54A GB3635254A GB794505A GB 794505 A GB794505 A GB 794505A GB 36352/54 A GB36352/54 A GB 36352/54A GB 3635254 A GB3635254 A GB 3635254A GB 794505 A GB794505 A GB 794505A
Authority
GB
United Kingdom
Prior art keywords
control
piston
valve
displacement
pilot
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
GB36352/54A
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.)
HM Hobson Ltd
Original Assignee
HM Hobson 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 HM Hobson Ltd filed Critical HM Hobson Ltd
Priority to GB36352/54A priority Critical patent/GB794505A/en
Publication of GB794505A publication Critical patent/GB794505A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64C—AEROPLANES; HELICOPTERS
    • B64C13/00—Control systems or transmitting systems for actuating flying-control surfaces, lift-increasing flaps, air brakes, or spoilers
    • B64C13/24—Transmitting means
    • B64C13/38—Transmitting means with power amplification
    • B64C13/40—Transmitting means with power amplification using fluid pressure
    • B64C13/46—Transmitting means with power amplification using fluid pressure with artificial feel

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Automation & Control Theory (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Servomotors (AREA)
  • Transmission Devices (AREA)
  • Mechanical Control Devices (AREA)

Abstract

794,505. Fluid-pressure servomotor-control systems. HOBSON Ltd., H. M., and WESTBURY, R. Nov. 11, 1955 [Dec. 15, 1954], No. 36352/54. Class 135. [Also in Group XXXIII] An aircraft control system in which the pilot's control member is coupled to the input member of a servomotor actuating a control surface, comprises a device for imposing on the input member a feel force proportional to the velocity of displacement of the control surface and to a function of airspeed which increases with airspeed. In Fig. 3 the surface is actuated by an hydraulic jack of which the piston-rod 16 is anchored at 17, and the cylinder 15 is linked to the control surface by a link 21. A bracket in the jack pivots a bell-crank lever 22, one arm being connected to the pilot's control member (not shown) by a link 11, and to the control valve 18, and the other arm to the piston-rod 25 of a piston 26 in a cylinder 27 pivoted to the jack. The valve 18 co-operates with fluid pressure inlets 19 and an exhaust port 20. The piston 26 is subjected to a control pressure derived from a unit (not shown) as described in Specifications 734,437 or 740,510, [Group XXXIII]. This pressure is caused to increase or decrease with airspeed, and the relationship may be modified above a given airspeed or Mach number. When the pilot displaces the control member, the valve 18 is displaced relatively to the jack body, and is subjected to a centring force from piston 26. This force is proportional to the pressure in cylinder 27, and also to the displacement of the bell-crank lever, i.e. the displacement of valve 18. From the characteristics of the servomotor, the velocity of the control surface is proportional to the displacement of valve 18, whence the centering force is proportional to the velocity of the control surface. A bob weight may be connected to act on the pilot's control member, being responsive to normal acceleration in the case of elevator control, and to acceleration in roll in the case of ailerons.
GB36352/54A 1954-12-15 1954-12-15 Improvements in or relating to aircraft Expired GB794505A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB36352/54A GB794505A (en) 1954-12-15 1954-12-15 Improvements in or relating to aircraft

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB36352/54A GB794505A (en) 1954-12-15 1954-12-15 Improvements in or relating to aircraft

Publications (1)

Publication Number Publication Date
GB794505A true GB794505A (en) 1958-05-07

Family

ID=10387358

Family Applications (1)

Application Number Title Priority Date Filing Date
GB36352/54A Expired GB794505A (en) 1954-12-15 1954-12-15 Improvements in or relating to aircraft

Country Status (1)

Country Link
GB (1) GB794505A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2826707A1 (en) * 2013-07-16 2015-01-21 McCulloch, Norman L Feedback system for a flying control member

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2826707A1 (en) * 2013-07-16 2015-01-21 McCulloch, Norman L Feedback system for a flying control member
EP3594111A1 (en) * 2013-07-16 2020-01-15 McCulloch, Norman L Feedback system for a flying control member

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