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Auxiliary Equipment

Auxiliary Equipment or attention when it is not in use. The base of the 25,000 lb. fitting is less than 3i in. square and that of the 10,000 lb. fitting 2 in. square. The link can be rotated through 360 deg. and maximum load can be applied to the fitting in any Details of Some Components Used for Subsidiary direction down to 12 deg. from the horizontal. The fittings are to be manufactured and marketed, under Services in Aircraft, Missiles and Space Vehicles licence from Short's, by the King Aircraft Division of H. K. Porter Company (Gt. Britain) Ltd. Pitot Tube and Temperature Controllers barriers that could decelerate an aircraft at the end of runway, much the same as fighter aircraft are re­ Stop Valve Research and Engineering Controls Ltd. have recent­ strained on the decks of aircraft carriers. Bliss overrun A stop valve which will exhaust gas to atmosphere ly announced an aircraft pitot pressure head of barriers are now installed or in the process of being has been developed by 77ie Hymatic Engineering Co. high de-icing performance suitable for use on sub­ installed at 70 airports throughout the world, 15 of Ltd., Redditch, Worcs. Designated type SV.I9 it has sonic or supersonic aircraft at altitudes up to 100,000 them in Europe. been designed for controlling single-acting rams and ft. and within a pressure range of 1 to 100 in. of The United States Federal Aviation Agency recently emergency air circuits and as a circuit bleed valve. It mercury. Designed for minimum aerodynamic drag, received bids on the development of equipment can be used for cable or rod operation to pressurize very low dependence on incidence angles, long service similar to the Bliss units for arrestment of much canopy and door seals. With piped exhaust it can also life and optimum sclf-rcgulating de-icing and anti- heavier civil transport type aircraft, and plans are in be used for windscreen de-icing systems. icing capabilities, the tube is claimed to have passed hand to test this type of equipment. the most strict wind-tunnel icing tests (including dry The rotary-nylon tape of arrestment used in the ice crystals) expected in practical flight at angles of Bliss overrun barriers offers a number of advantages attack up to 25 deg. over the fluid piston principle which has been utilized in arresters for years. Equipment utilizing the rotary- nylon principle affords better control of off-centre engagements and it also has automatic sensing capa­ bilities which enable a single installation to be effec­ tive over a wide range of aircraft speeds. It has worked effectively in numerous engagements by military aircraft. The system is used in conjunction with an aircraft equipped with an arresting hook which is lowered at the pilot's discretion. The hook engages a wire-rope pendant stretched across the runway and attached to nylon tapes wound on reels which play out the tape as the aircraft engages it. The reels are coupled to aircraft brakes which absorb the energy of the impact and gradually slow the aircraft to a halt. Bliss believe that providing equipment to stop large The tube, which is supported by a strut shaped to commercial transports is simply a matter of increasing an RAE 103 aerofoil section to keep aerodynamic the energy-absorbing capacity of the currently avail­ drag to a minimum, incorporates hermetically sealed, able rotary-nylon tape equipment and fitting the automatically regulated heater elements unaffected by aircraft with hooks. continuous operation in still air at an ambient tem­ The development of the Bliss system is claimed to perature of up to 70 deg. C. In addition, endurance have solved two difficult problems. First, arresting tests at minus 70 and plus 540 deg. C. have been suc­ action must be 'gentle' enough to bring jet aircraft to cessfully completed. a safe stop without damage to the plane or injury to The characteristics of platinum-resistance ther­ the occupants. Second the unit must be capable of mometers—accuracy and reliability over large tem­ stopping an aircraft that engages the cable off-centre. perature range—form the design basis of a scries of The Company has also developed an application precision temperature controllers also introduced by of the rotary-nylon tape principle for a combination Fig. 3.—Stop valve, type SV.I9, for pneumatic Research and Engineering Controls Ltd. The control launching and arresting device-designated Cataport. systems—produced by Th e Hymati c Engineering circuitry, comprising a 400 c/s inductively coupled This system is of particular use in adapting military jet Co . Ltd. ratio-arm bridge, high performance transistor ampli­ aircraft to operations from the short runways available The SV.I9 consists of a light alloy body with an fier and phase sensitive switch, can be situated up to at bases in forward areas. The company is currently external cone inlet, a banjo with an external cone 1,000 ft. from the sensor, the system being insensitive building a number of these for the U.S. Marine outlet and two 'O ' rings for scaling purposes. A piston to the resistance and capacitance of the connecting Corps. type push rod with an operational diameter of A in- leads. and a guide diameter of \ in. is positioned in the Freight Lashing Fitting Temperature control is effected in eighteen standard ■/if in. bore of the body, along the axis of the inlet ranges available between minus 200 and plus 800 deg. A new type of freight lashing fitting, developed by connection and protrudes at the opposite end for C. and in equivalent Fahrenheit ranges (other ranges Short Brothers and Harland for their Belfast freighter, linkage purposes. can be provided), the control for each range being is being adopted as standard equipment by the The operating rod movement is limited by a guide determined by the setting of a precisely calibrated Ministry of Aviation. of | in. I.D. and a threaded retaining ring is screwed variable resistor. By calibrating each controller indi­ The design of the new fitting is such that it will on to the body. All dirt is excluded by a rubber wiper vidually and using accurate platinum sensors manu­ withstand a load of 25,000 lb., and yet can be installed ring on the operating rod. factured by the same company an overall setting or detached in a few seconds without the use of tools. The SV.I9 has a maximum working pressure of accuracy of +0-2 per cent of the absolute temperature A smaller version of the fitting, with a maximum load 200 lb./sq. in. It has an operating temperature of (or 0-5 deg. C. whichever is greater) has been of 10,000 lb., has also been developed. Both types, plus 70 to minus 40 deg. C. and an environment achieved. The basic controller differential is better when removed, leave the floor or wall completely temperature of plus 70 to minus 65 deg. C. The valve than 0-2 deg. C. and is largely independent of the unobstructed, thus facilitating the handling of cargo has i in. B.S.P. external cone inlet and outlet con­ range. within an aircraft. Each fitting consists of two parts: nexions and weighs 0-10 lb. (approx.). It is currently In operation, the error signal from the bridge is an aluminium alloy base, which is permanently being developed for a wider temperature range of up mounted with its top surface flush with the floor or amplified and fed to the phase sensitive switch which to plus 100 deg. C. and a pressure of up to 700 wall; and a lashing link, carrying a swivel fitting and operates a Type 3000 relay, the possibility of relay lb./sq. in. a spring-loaded locking plunger which engage in the chatter being eliminated by driving the relay with a base. positive 'step' function derived from the 'ramp' Hangar Tent function input. The output circuit drives an electro­ The Salzmann hangar tent type 2000 has an entrance mechanical star indicator directly to give indication width of 52} ft. and a vertical clearance of 15 ft. The of the control state of the system. basic length of the tent is 50 ft. although this can be All circuits, designed for use at ambient tempera­ extended indefinitely with additional sections, and is tures up to 55 deg. C , use solid state components, thus limited only by the terrain. The framework of printed wiring and operate from 110/240 V a.c. aluminium alloy is self-supporting without internal (50/60 c/s). A 12 V d.c. power pack and the Type 3000 supports, and provides a large unobstructed working relay are normally housed with the control circuits area. but, if required, the relay can be situated remotely The tent comprises a very strong canvas cover which and the unit supplied without the 12 V power pack. is rotproof, waterproof, fire-resisting and infra-red Provision has been made for supplying an output proof, over the light-metal framework. Perhaps its to an 'add on' unit for proportional control using outstanding feature is the fact that it can be erected Silicon Controlled Rectifiers. Fig. 2.—Aircraf t freight lashing link engaged with entirely from ground level. It is estimated that eight Further details of the pitot pressure head and ligh t alloy base—both units developed by Short men can erect the type 2000 in 6 hours. temperature controllers are available from Research Brother s and Harland Ltd. The great height within the tent gives plenty of room ami Engineering Controls Ltd., South Bcrstcd In­ The base itself is a simple rugged component to work on an aircraft tailplane and even allows a dustrial Estate, Bognor Regis, Sussex. and, being only i in. in depth, can easily be flush- mobile crane to be used. The tent can be transported fitted and attached without elaborate provision on two 3-ton trucks. Overrun Barriers in the underlying structure of the aircraft. As the The distributors in Europe, of the type 2000 hangar In 1953, the E. It'. Bliss Co., Canton, Ohio, U.S.A. locking plunger and all working parts are in the tent and similar versions, are John Edgingtoit and Co. began work on military and commercial overrun detachable portion the base requires no maintenance Ltd., 108 Old Kent Road, London, S.E.I. October 1962 http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Aircraft Engineering and Aerospace Technology Emerald Publishing

Auxiliary Equipment

Aircraft Engineering and Aerospace Technology , Volume 34 (10): 1 – Oct 1, 1962
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Publisher
Emerald Publishing
Copyright
Copyright © Emerald Group Publishing Limited
ISSN
0002-2667
DOI
10.1108/eb033628
Publisher site
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Abstract

or attention when it is not in use. The base of the 25,000 lb. fitting is less than 3i in. square and that of the 10,000 lb. fitting 2 in. square. The link can be rotated through 360 deg. and maximum load can be applied to the fitting in any Details of Some Components Used for Subsidiary direction down to 12 deg. from the horizontal. The fittings are to be manufactured and marketed, under Services in Aircraft, Missiles and Space Vehicles licence from Short's, by the King Aircraft Division of H. K. Porter Company (Gt. Britain) Ltd. Pitot Tube and Temperature Controllers barriers that could decelerate an aircraft at the end of runway, much the same as fighter aircraft are re­ Stop Valve Research and Engineering Controls Ltd. have recent­ strained on the decks of aircraft carriers. Bliss overrun A stop valve which will exhaust gas to atmosphere ly announced an aircraft pitot pressure head of barriers are now installed or in the process of being has been developed by 77ie Hymatic Engineering Co. high de-icing performance suitable for use on sub­ installed at 70 airports throughout the world, 15 of Ltd., Redditch, Worcs. Designated type SV.I9 it has sonic or supersonic aircraft at altitudes up to 100,000 them in Europe. been designed for controlling single-acting rams and ft. and within a pressure range of 1 to 100 in. of The United States Federal Aviation Agency recently emergency air circuits and as a circuit bleed valve. It mercury. Designed for minimum aerodynamic drag, received bids on the development of equipment can be used for cable or rod operation to pressurize very low dependence on incidence angles, long service similar to the Bliss units for arrestment of much canopy and door seals. With piped exhaust it can also life and optimum sclf-rcgulating de-icing and anti- heavier civil transport type aircraft, and plans are in be used for windscreen de-icing systems. icing capabilities, the tube is claimed to have passed hand to test this type of equipment. the most strict wind-tunnel icing tests (including dry The rotary-nylon tape of arrestment used in the ice crystals) expected in practical flight at angles of Bliss overrun barriers offers a number of advantages attack up to 25 deg. over the fluid piston principle which has been utilized in arresters for years. Equipment utilizing the rotary- nylon principle affords better control of off-centre engagements and it also has automatic sensing capa­ bilities which enable a single installation to be effec­ tive over a wide range of aircraft speeds. It has worked effectively in numerous engagements by military aircraft. The system is used in conjunction with an aircraft equipped with an arresting hook which is lowered at the pilot's discretion. The hook engages a wire-rope pendant stretched across the runway and attached to nylon tapes wound on reels which play out the tape as the aircraft engages it. The reels are coupled to aircraft brakes which absorb the energy of the impact and gradually slow the aircraft to a halt. Bliss believe that providing equipment to stop large The tube, which is supported by a strut shaped to commercial transports is simply a matter of increasing an RAE 103 aerofoil section to keep aerodynamic the energy-absorbing capacity of the currently avail­ drag to a minimum, incorporates hermetically sealed, able rotary-nylon tape equipment and fitting the automatically regulated heater elements unaffected by aircraft with hooks. continuous operation in still air at an ambient tem­ The development of the Bliss system is claimed to perature of up to 70 deg. C. In addition, endurance have solved two difficult problems. First, arresting tests at minus 70 and plus 540 deg. C. have been suc­ action must be 'gentle' enough to bring jet aircraft to cessfully completed. a safe stop without damage to the plane or injury to The characteristics of platinum-resistance ther­ the occupants. Second the unit must be capable of mometers—accuracy and reliability over large tem­ stopping an aircraft that engages the cable off-centre. perature range—form the design basis of a scries of The Company has also developed an application precision temperature controllers also introduced by of the rotary-nylon tape principle for a combination Fig. 3.—Stop valve, type SV.I9, for pneumatic Research and Engineering Controls Ltd. The control launching and arresting device-designated Cataport. systems—produced by Th e Hymati c Engineering circuitry, comprising a 400 c/s inductively coupled This system is of particular use in adapting military jet Co . Ltd. ratio-arm bridge, high performance transistor ampli­ aircraft to operations from the short runways available The SV.I9 consists of a light alloy body with an fier and phase sensitive switch, can be situated up to at bases in forward areas. The company is currently external cone inlet, a banjo with an external cone 1,000 ft. from the sensor, the system being insensitive building a number of these for the U.S. Marine outlet and two 'O ' rings for scaling purposes. A piston to the resistance and capacitance of the connecting Corps. type push rod with an operational diameter of A in- leads. and a guide diameter of \ in. is positioned in the Freight Lashing Fitting Temperature control is effected in eighteen standard ■/if in. bore of the body, along the axis of the inlet ranges available between minus 200 and plus 800 deg. A new type of freight lashing fitting, developed by connection and protrudes at the opposite end for C. and in equivalent Fahrenheit ranges (other ranges Short Brothers and Harland for their Belfast freighter, linkage purposes. can be provided), the control for each range being is being adopted as standard equipment by the The operating rod movement is limited by a guide determined by the setting of a precisely calibrated Ministry of Aviation. of | in. I.D. and a threaded retaining ring is screwed variable resistor. By calibrating each controller indi­ The design of the new fitting is such that it will on to the body. All dirt is excluded by a rubber wiper vidually and using accurate platinum sensors manu­ withstand a load of 25,000 lb., and yet can be installed ring on the operating rod. factured by the same company an overall setting or detached in a few seconds without the use of tools. The SV.I9 has a maximum working pressure of accuracy of +0-2 per cent of the absolute temperature A smaller version of the fitting, with a maximum load 200 lb./sq. in. It has an operating temperature of (or 0-5 deg. C. whichever is greater) has been of 10,000 lb., has also been developed. Both types, plus 70 to minus 40 deg. C. and an environment achieved. The basic controller differential is better when removed, leave the floor or wall completely temperature of plus 70 to minus 65 deg. C. The valve than 0-2 deg. C. and is largely independent of the unobstructed, thus facilitating the handling of cargo has i in. B.S.P. external cone inlet and outlet con­ range. within an aircraft. Each fitting consists of two parts: nexions and weighs 0-10 lb. (approx.). It is currently In operation, the error signal from the bridge is an aluminium alloy base, which is permanently being developed for a wider temperature range of up mounted with its top surface flush with the floor or amplified and fed to the phase sensitive switch which to plus 100 deg. C. and a pressure of up to 700 wall; and a lashing link, carrying a swivel fitting and operates a Type 3000 relay, the possibility of relay lb./sq. in. a spring-loaded locking plunger which engage in the chatter being eliminated by driving the relay with a base. positive 'step' function derived from the 'ramp' Hangar Tent function input. The output circuit drives an electro­ The Salzmann hangar tent type 2000 has an entrance mechanical star indicator directly to give indication width of 52} ft. and a vertical clearance of 15 ft. The of the control state of the system. basic length of the tent is 50 ft. although this can be All circuits, designed for use at ambient tempera­ extended indefinitely with additional sections, and is tures up to 55 deg. C , use solid state components, thus limited only by the terrain. The framework of printed wiring and operate from 110/240 V a.c. aluminium alloy is self-supporting without internal (50/60 c/s). A 12 V d.c. power pack and the Type 3000 supports, and provides a large unobstructed working relay are normally housed with the control circuits area. but, if required, the relay can be situated remotely The tent comprises a very strong canvas cover which and the unit supplied without the 12 V power pack. is rotproof, waterproof, fire-resisting and infra-red Provision has been made for supplying an output proof, over the light-metal framework. Perhaps its to an 'add on' unit for proportional control using outstanding feature is the fact that it can be erected Silicon Controlled Rectifiers. Fig. 2.—Aircraf t freight lashing link engaged with entirely from ground level. It is estimated that eight Further details of the pitot pressure head and ligh t alloy base—both units developed by Short men can erect the type 2000 in 6 hours. temperature controllers are available from Research Brother s and Harland Ltd. The great height within the tent gives plenty of room ami Engineering Controls Ltd., South Bcrstcd In­ The base itself is a simple rugged component to work on an aircraft tailplane and even allows a dustrial Estate, Bognor Regis, Sussex. and, being only i in. in depth, can easily be flush- mobile crane to be used. The tent can be transported fitted and attached without elaborate provision on two 3-ton trucks. Overrun Barriers in the underlying structure of the aircraft. As the The distributors in Europe, of the type 2000 hangar In 1953, the E. It'. Bliss Co., Canton, Ohio, U.S.A. locking plunger and all working parts are in the tent and similar versions, are John Edgingtoit and Co. began work on military and commercial overrun detachable portion the base requires no maintenance Ltd., 108 Old Kent Road, London, S.E.I. October 1962

Journal

Aircraft Engineering and Aerospace Technology – Emerald Publishing

Published: Oct 1, 1962

There are no references for this article.