enables two blocks of honeycomb to be sliced at the same time and thus increases the output from CIBA's Auxiliary Equipment plant, at the same time enabling the standard tolerance to be reduced to ±0-005 in. Closer tolerances can often be held. In addition to these improvements to Details of Some Components Used for Subsidiary their facilities for the manufacture of honeycomb by the corrugation process (a method which they have Services in Aircraft, Missiles and Space Vehicles used for the last seven years), CIBA have also started production recently on a new expansion method of honeycomb production which will enable larger sheets Multi-Services Connectors and lifts more smoothly, and the nylon strops are of honeycomb (up to 10 ft. x 4 ft. 6 in.) to be produced. easier to handle on the ground and are considerably The crew of a modern jet bomber normally consists 'Aeroweb' is being supplied to British aircraft cheaper. of three or four members who may have two or three manufacturers, and in addition is being exported to The possibility of using nylon was investigated different jobs to do during the course of a sortie. France, Germany, Holland, Italy and Sweden. when it was found that the use of steel strops was Although there is very little space in which to move resulting in loads as high as 2g in the Belvedere. inside the aircraft, the crew often have to move a few Precision Aneroid Barometer Some form of shock absorber between the aircraft feet from one position to another. and the load was essential and nylon looked attrac A large number of Precision Aneroid Barometers At high altitudes this presents the problem of tive because it combined high tensile strength with M.I991 have been ordered by the Meteorological maintaining the necessary supplies of oxygen, air considerable elasticity. An approach was made to Office from Mechanism Limited of Croydon. These ventilation, air monitoring, which feeds the suit pres the G.Q. Parachute Company Ltd. who agreed to instruments will be used largely in weather ships, sure back to the oxygen regulator, in addition to carry out some work with a two-inch wide nylon where their robustness, portability, and extreme microphone-telephone and visor connections and webbing with a breaking strength of 15,000 lb. accuracy under adverse conditions, show a superiority expiratory valve heating. It is of the utmost importance over all other barometers tested. An eight-foot long strop composed of two lamina therefore that the time during which a member of tions of this webbing sewn together and with an Several years of extensive field tests by the Meteoro the crew is disconnected from the essential supplies eight-inch double-thickness loop at each end was logical Office and other organizations have resulted in and services of the aircraft is as short as possible. found to have a breaking strength of 13-2 tons, design improvements, to give an instrument, giving To reduce this to an absolute minimum The giving a safety factor of rather more than 4-9 on confidence to all its users. These tests have shown Hymatic Engineering Co. Ltd., Redditch, Wores., 6,000 lb This was considered satisfactory as the small have developed and type tested a personal equipment pins on the tensile machine represented conditions connector, the MSC113, for use by moving crew as severe as the worst likely to be met in service. members of bomber aircraft who normally use static Flight tests with a load of 6,000 lb. were carried out seats. successfully and recordings from a strain gauge link interposed between the aircraft hook and the strop showed that no unacceptable loads were put in the aircraft structure even when attempts were made at snatch lifts. Further static tests confirmed that no harmful frequencies were set up anywhere in the range when the strop was excited at 500 lb. load intervals. At the present stage the nylon webbing strop is in an elementary form and it is considered that a num ber of improvements could be made. Nevertheless it is expected to have a life of at least 12 months under normal working conditions and the advantages are already clear. Ear Plugs The MSCI13 has been developed against a Ministry of Aviation contract and is currently in production. Amplivox Ltd., Bercsford Avenue, Wembley, Although it has been designed specifically for full Middlesex, have produced a novel design of car plugs pressure suits it is also suitable for use with other made from soft silicone rubber, which are specially negligible drift in the aneroid calibration over periods Hying clothing although for these the air monitoring designed to seal the ear in a comfortable manner varying on different instruments, from six months to line would not be used. two years. The MSCI 13 consists of two sub-assemblies. One Since this barometer is both portable and stable it is the man-portion, MSCI 13-002, which is located on can be used to transfer a reading from place to place, a plate built into the right thigh of the suit to distri and therefore permits, for example, the comparison of bute the load. In this position it can be operated by readings of mercury barometers situated in different either hand by simply depressing the catch-lever for places. By the use of a number of instruments as port spring-actuated separation, or by pulling the aircraft able sub-standards, with relatively long term stability, portion along a guide-strip for a snap connection the influence of one centrally situated master mercury of the services. In addition the portion includes a barometer can be transmitted to a number of satellite readily removable, ventilation air connection which stations, to establish unanimity of standards of baro facilitates dressing. meter accuracy with only occasional checks against The other assembly, the aircraft portion, MSCI 13- the central master. 003 , supplies all the necessary services including The robust construction of the instrument is oxygen, ventilation and air monitoring to the crew achieved by dispensing with the usual levers and gears member. It is usually attached to lengths of hoses and for the magnification of the aneroid displacement, against all extraneous noises. Called Supcrsoncx, these leads to allow the crew members complete mobility which is measured instead by means of a micrometer plugs are non-toxic, can be boiled or sterilized and are within the aircraft without having to disconnect the screw. The point of contact between micrometer and made in such a way that the single universal size will services. capsule is detected by means of a miniature cathode fit all ears. They are supplied in a small plastic box. The MSCI 13 is simple to operate. To connect it, ray tuning indicator, and the micrometer read-out is the member of the crew merely places the aircraft by means of a five-figure digital counter graduated in Band Saw for Metal Honeycomb portion on the guide plate and, using the side-strip units of 0-1 mb. This arrangement practically elimin as a location, pulls the aircraft portion up to the man FIG . 3 shows a horizontal band saw recently pur ates the possibility of errors of observation, and en portion until it locks by means of a toggle catch. chased from the Midland Saw & Tool Co. Ltd. by ables readings to be taken by operators completely Similarly, to disconnect it, he operates the release CIBA (A.R.L.) Ltd., Duxford, Cambridge, for the unskilled in engineering techniques. catch and the aircraft portion is ejected into his hand. manufacture of 'Aeroweb' honeycomb. The saw The standard model used by the Meteorological The MSCI 13 has been designed so that the connec Office, has a range of 900 to 1,050 mb. The instrument tion of the man portion must be complete, making can discriminate changes in absolute pressure of half-cocking impossible. If the connection is not 0-02 mb., and has a basic accuracy at normal room properly made and locked, the man portion is auto temperatures of ±0-3 mb. The mechanism is tem matically rejected by a spring action. perature compensated and over a range of 0 to 40 deg. All hose connections are readily removable without C. will not change in reading by more than ±0-5 mb. tools and the method of locking in position is such as to allow free rotation to accommodate any tendency De-Icer Boot of the hoses to twist. A new aircraft rubber de-icer boot, manufactured to a dimensional tolerance of ±0-010 in., has been Nylon Strops for Helicopter Load Lifting developed by B. F . Goodrich of America, and is avail Strops made from nylon webbing, designed to en able from its associate company, Palmer Aero Pro ducts Ltd., a subsidiary of BTR Industries Ltd. This able Belvedere helicopters to lift slung loads of up to new de-icing equipment retains the designed aero 6,000 lb., have been successfully tested by the Bristol dynamic forms of leading edges of wings, flaps and tail Helicopter Division of Westland Aircraft Ltd., and surfaces—which remain unaffected at speeds above are a standard fitting in R.A.F. Belvederes. 550 m.p.h. Trials show that they have several advantages over The boot consists of a network of tough, nylon- the conventional steel strops which have been used reinforced rubber tubes inflated in cycle by air bled hitherto in this country. There is less strain in the from the engines. aircraft fuselage. The machine handles more easily April 1962 117
Aircraft Engineering and Aerospace Technology – Emerald Publishing
Published: Apr 1, 1962
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