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- Publisher
- Emerald Publishing
- Copyright
- Copyright © Emerald Group Publishing Limited
- ISSN
- 0002-2667
- DOI
- 10.1108/eb035131
- Publisher site
- See Article on Publisher Site
Abstract
30 AIRCRAFT ENGINEERING February 1974 Equipment and materials linear or logarithmic and can follow the fundamental control devices. The electrolyte is ejected through an STATIC DISCHARGER UNIT or multiplied frequency. insulated nozzle inside of which there is a metallic Two discharger units eliminate static interference B & K Laboratories Ltd, Cross Lances Rd, electrode. The electrolyte stream is charged cathodic- problems in aircraft NAV-COM systems and ensure Hounslow, Middx. Telephone: 01-570 7774. ally and is directed against the workpiece. The clear in-flight communication. Suitable for both electrical connections are brought out through the private and commercial prop-jet or propeller aircraft, POLYOLEFIN COMPOUNDS nozzle manifold and connected to suitable sensors they have close packed highly sensitive tungsten A range of 6 Flamolin compounds initially includes and control devices. The feed rate of the nozzle into filaments, which continuously divide discharging low and high density polyethylene and polypropylene the workpiece is adjusted to exactly match the cutting energy into silent pulses, form the tip of the discharger types. Also included are crosslinkable materials for rate of the stream in the workpiece. The drilling rates unit. An outer Teflon cover, which will not crack or cable coating and rotational moulding. They have arc sustained even with multiple drilling. peel, protects the conductive core from exposure to good flame-retardant properties, are non drip and General Electric Co, D-53, Bonn-Bad Godesberg, corrosive fluids and atmospheric erosion and the generate low levels of smoke. There is minimal Michaelstr 4b, Germany. unit-which has a lightweight rigid fibreglass core degradation of the compounds basic properties and support-i s virtually unbreakable. There are trailing they can be processed on conventional machinery for edge and a wing tip type discharger which can be the respective compound type. TRACKING FREQUENCY MULTIPLIER fixed quickly into existing mounting holes with the USI Europe NV, Zwijndrectht, PO Box 529, 2000 strong nickel coated aluminium bracket supplied. The Model 1901 tracking frequency multiplier, will lock on to, and automatically track, the fundamental, Antwerp, Belgium. Van Dusen Aircraft Supplies Co, Oxford Airport, harmonic or sub harmonic of a signal and provide an Kidlington, Oxford. Telephone: Kidlington 4131. output which can be used to tunc heterodyne analysers NOISE MONITOR or slave-filters and thus facilitate a wide variety of An audio dosimeter which can be worn, measures WIREWOUND POTENTIOMETERS automatic selective measurements. It also provides a all noise exposure between 80 and 115dBA on the A range of high precision 10-turn potentiometers linear or logarithmic dc output proportional to 3dB halving principle. It weighs under 8oz and is arc operable in temperatures ranging from —55° to frequency which can be used to drive the paper feed powered by a 9V standard transistorised battery kept 105°C, with insulation resistance of 1,000 Meg ohms, in the pocket. The microphone is worn on the shirt collar. Du Pont (UK) Ltd, 18 Breams Buildings, Fetter Lane, London EC4A 1HT. Telephone 01-242 9044. POWERED SCREWDRIVERS Model 3625 two-speed screwdriver is designed to handle a very wide range of the larger wood screws and metal fasteners. The two-speed gearbox gives full load speeds of 600 and 1400rpm, enables the correct speed to be selected for the fastener type in use. It is powered by a 360W motor and is fitted with reversing switches. It is also double-insulated. Wolf Electric Tools Ltd, Hanger Lane, London W5 1DS. Telephone: 01-998 2911. POWERED SCREWDRIVER Model 3609 high speed fastener screwdriver has a full load spindle speed of 1600rpm and weighs 31b 8oz. It is designed primarily for metal fasteners such as self drilling and tapping screws, self tapping screws, etc., and is supplied complete with accessories for a wide range of types and sizes of such fasteners in common usage. It is powered by a 360W motor and is fitted with reversing switches. It is also double insulated. Wolf Electric Tools Ltd, Hanger Lane, London W5 1DS. Telephone: 01-998 2911. ENGINE OIL of a graphic level recorder or an X-Y recorder and An aviation turbine oil has been specially developed so make possible the automatic charting of harmonic for use in supersonic military and civil aircraft content variations relative to other factors. It covers engines. Known as Esso turbo oil 25, (ETO 25), it is frequencies from 5Hz up to 200kHz and will accept a complex blend of synthetic oils and additives. practically any kind of periodic waveform, including noise figure of 100Ω EN R max, a rotational life of Esso Petroleum Co Ltd, Esso House, Victoria St, square wave, at inputs from 30mV to 300V rms. The 2x10° revolutions and linearity tolerance of ±0·25 London SW1E 5JW. Telephone: 01-834 6677. input circuitry is AGC regulated with adjustable per cent. The standard resistance values arc from 10, metered control and incorporates hysteresis. The 25 or 50 Ω t o 200K Ω or 300 Ω with a power dissipa VARIAN LOGARITHMIC AMPLIFIERS trigger signal is converted into a reference frequency tion of 2·5, 3 or 5W at 40°C. and fed to a phase locked loop operating on the The ITL-7 scries of solid state logarithmic am Amphenol Ltd, Thanet Way, Whitstable, Kent heterodyne principle, and beating between a fixed plifiers arc sequential detection, video i.f. amplifiers CT5 3JF. Telephone: Whitstable 4345. and variable high frequency. These HF signals can which provide improved performance in the reception then be used to tune other instruments such as of high speed pulses. They feature rise times as low as ELECTRO STREAM MACHINING heterodyne analysers or filters in synchronism with 0·03 microsec and arc designed primarily for pulse EQUIPMENT the low frequency input to the 1901. A phase-lock or AM signals, but most can be supplied with dc An electro-stream machining equipment provides coupled input to process continuous wave informa meter ensures correct operation. Frequency multi an electrochemical machining method that can tion. Units can deliver an input dynamic range of plication is selectable from 0·1 to 99·9 or from l to 999 produce holes in super alloy metals as small as —80 to 0 dBm and log accuracy of ± 1 dB and can be by means of a front panel digital indicator switch and 0·005in (0·127mm) in diameter and with depth up to supplied with operating frequencies of 30, 60, 70 or provision is also made for using the mains frequency 50 times the hole diameter burr-free. It can drill 160 MHz. They can also be supplied as matched pairs as an input signal with the same multiplication cobalt, nickel, titanium, stainless steel, tool steel, and with the log-video amplitude matched to input within facilities. In addition, there is a socket provided for carbon steel. The workpiece is made anodic in the the connection of an external frequency divider so ldB . same fashion as in electrochemical machining. The that the fundamental frequency can, if desired, be EMI Varian Ltd, Hayes. Middx. Telephone: electrolyte, usually an acid, is pumped from the supply multiplied by a fraction. The dc output can be either 01-573 3888. tank which is equipped with suitable temperature
Journal
Aircraft Engineering and Aerospace Technology – Emerald Publishing
Published: Feb 1, 1974