GB898509A - Improvements in or relating to thrust indicators for use on jet propelled aircraft - Google Patents

Improvements in or relating to thrust indicators for use on jet propelled aircraft

Info

Publication number
GB898509A
GB898509A GB4079859A GB4079859A GB898509A GB 898509 A GB898509 A GB 898509A GB 4079859 A GB4079859 A GB 4079859A GB 4079859 A GB4079859 A GB 4079859A GB 898509 A GB898509 A GB 898509A
Authority
GB
United Kingdom
Prior art keywords
bellows
lever
nozzle
signal
kpr
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
GB4079859A
Inventor
Pierre Henry John Young
James Francis Arthur Davies
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.)
Bristol Siddeley Engines Ltd
Original Assignee
Bristol Siddeley Engines 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 Bristol Siddeley Engines Ltd filed Critical Bristol Siddeley Engines Ltd
Priority to GB4079859A priority Critical patent/GB898509A/en
Priority to DEB60299A priority patent/DE1129832B/en
Publication of GB898509A publication Critical patent/GB898509A/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02K—JET-PROPULSION PLANTS
    • F02K1/00—Plants characterised by the form or arrangement of the jet pipe or nozzle; Jet pipes or nozzles peculiar thereto
    • F02K1/06—Varying effective area of jet pipe or nozzle
    • F02K1/15—Control or regulation
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
    • G01L5/13—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring the tractive or propulsive power of vehicles
    • G01L5/133—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring the tractive or propulsive power of vehicles for measuring thrust of propulsive devices, e.g. of propellers
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
    • G07C3/00—Registering or indicating the condition or the working of machines or other apparatus, other than vehicles
    • G07C3/005—Registering or indicating the condition or the working of machines or other apparatus, other than vehicles during manufacturing process

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Ocean & Marine Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Measuring Fluid Pressure (AREA)
  • Testing Of Engines (AREA)

Abstract

898,509. Measuring electrically. BRISTOL SIDDELEY ENGINES Ltd. Nov. 30, 1960 [Dec. 1, 1959], No. 40798/59. Class 40 (1). In an apparatus for estimating the gross thrust of an aircraft jet propulsion unit a signal is derived which is a function of (KPr-Pa), where K is a constant dependent on the jet nozzle geometry, Pr is the static pressure on the upstream side of the jet propulsion nozzle and Pa is the ambient pressure. This signal may be multiplied by the same function of the area of the jet nozzle at its outlet plane (An) if this area is adjustable. In addition, in order to obtain a signal which varies less with changed altitude and forward speed, the gross thrust signal may be divided by the appropriate function of the impact pressure, Pi, due to the forward speed of the aircraft. In the preferred embodiment a force proportional to (KPr-Pa) is applied to a lever 13 by the arrangements of bellows 15 and 16, bellows 15 being evacuated, and bellows 16 being connected at 18 to the upstream side of the jet propulsion nozzle 11. Bellows 16 is K/K - 1 times the size of bellows 15. The bellows 21 and 23 provide a rebalancing force on the lever 13 proportional to the impact pressure Pi as sensed by the pitot tube 19 and communicated to bellows 21, bellows 23 being evacuated. The lever is kept in balance by sensing deflections of the lever 13 by switches 32 and 33 which energize motor 29 and turn lead screw 28 to move the pivot 26 and hence the point of application of the rebalancing force derived from Pi to the position for equilibrium of the lever 13. It is shown that the position of the pivot point 26 then bears a square root relation with the KPr - Pa desired function of The position of Pi the pivot 26 is signalled by potentiometer 34 to a multiplier 36 whose other input is a signal derived from potentiometer 35 coupled to the nozzle mechanism so as to give an output proportional to the square root of the nozzle area. The indicator 37 may then be suitably calibrated.
GB4079859A 1959-12-01 1959-12-01 Improvements in or relating to thrust indicators for use on jet propelled aircraft Expired GB898509A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB4079859A GB898509A (en) 1959-12-01 1959-12-01 Improvements in or relating to thrust indicators for use on jet propelled aircraft
DEB60299A DE1129832B (en) 1959-12-01 1960-11-30 Airplane with a jet propulsion unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4079859A GB898509A (en) 1959-12-01 1959-12-01 Improvements in or relating to thrust indicators for use on jet propelled aircraft

Publications (1)

Publication Number Publication Date
GB898509A true GB898509A (en) 1962-06-14

Family

ID=10416662

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4079859A Expired GB898509A (en) 1959-12-01 1959-12-01 Improvements in or relating to thrust indicators for use on jet propelled aircraft

Country Status (2)

Country Link
DE (1) DE1129832B (en)
GB (1) GB898509A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110031181A (en) * 2019-04-25 2019-07-19 中国空气动力研究与发展中心低速空气动力研究所 A kind of TPS propulsive thrust nacelle thrust calibration test method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110031181A (en) * 2019-04-25 2019-07-19 中国空气动力研究与发展中心低速空气动力研究所 A kind of TPS propulsive thrust nacelle thrust calibration test method
CN110031181B (en) * 2019-04-25 2023-10-13 中国空气动力研究与发展中心低速空气动力研究所 TPS reverse thrust nacelle thrust calibration test method

Also Published As

Publication number Publication date
DE1129832B (en) 1962-05-17
DE1129832C2 (en) 1962-11-22

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