Circuit Bodging: Laser Tripwire Sensor

One very important application of electrical engineering is security systems. Although fear of a Big Brother style continuous surveillance system might be justified in some places, we would once again like to remind you that technology can be used for Good as well as Evil. In this issue of Maxwell we present: a laser tripwire. It’s been done in...

Circuit Bodging: Atari Punk Console

Circuit bodging is back! Maxwell is proud to present small, simple, but ultimately lovable little circuits to build for your own, personal pleasure. In this edition we are featuring: The Atari Punk Console. The Atari Punk Console (or APC) is a 555 timer IC based noise maker circuit. The original was designed by Forrest M. Mims III, and published...

A study of shock impacts and vibration dose values onboard highspeed marine craft

Global analysis of wellhead protection glory holes for terra nova

Quenching of excitonic quantum-well photoluminescence by intense far-infrared radiation: Free-carrier heating

The influence of marine fuel quality on lubricating oil performance

Acoustic wave propagation through the shear layer of the DNW large open jet wind tunnel

The German-Dutch Wind Tunnel (DNW) in aeroacoustic mode, consists of a 20 m long open jet, surrounded by a large anechoic room. Sound waves from a model have to cross the shear layer of the jet to reach the microphones outside the flow. The acoustic correction procedures for 1/3 octave analysis were checked with a calibrated noise source using...

The use of wing tip sails to reduce vortex drag

Windtunnel measurements of the flow around the tip tanks of a model of a Morane-Soulnier Paris aircraft have been used to design cambered and twisted auxiliary surfaces, each only 0.4% to 0.6% of the wing area, which unwound the tip vortices formed at incidence and in so doing experienced a thrust, effectively reducing the vortex drag. Flight...

A glossary of coastal engineering terms

Trajectories of raindrops in a jet issuing into a normal crosswind

Experimental investigation of an air curtain for protection of an outdoor power installations from salt spray

Effect of welding and post-weld heat treatment on Ducol W30

Notch toughness, tensile and hardness properties of a normalised and tempered Mn-Cr-Mo-V steel have been determined after thermal cycling to 1275º C in simulation of thermal cycles experienced in the coarse grained region of the heat affected zone (HAZ). The metallurgical structure was investigated by means of optical microscopy and electron...

British Hydraulic Engineering and Research

Overview of hydraulic research in the United Kingdom in the period before 1963.

Surface pressures and structural strains resulting from fluctuations in the turbulent boundary layer of a Fairey Delta 2 aircraft

This paper describes measurements of surface pressure and structural strain due to fluctuations in the turbulent boundary layer of a Fairy Delta 2 aircraft. The measurements were made on the lower surface of the wing at Mach numbers up to 1·6. The results show that both pressure and strain depend on the kinetic pressure q and are independent of...

The transmission of aircraft vibration to man-mounted equipment

The transmission of aircraft vibration to man-mounted functional equipment has been investigated by laboratory tests on subjects in Aircrew Equipment Assemblies and an ejection seat. Transmissibility/frequency curves have been derived in the three cardinal directions for items in the head and trunk regions, and show that man-mounted equipment...

Flight experiments on the boundary layer characteristics of a swept back wing

The College of Aeronautics was founded in 1946 and was granted university status in 1969 becoming the Cranfield Institute of Technology. In 1993 it changed its name to Cranfield University.