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“Melmoth,” an amateur-designed and built light airplane, has a number of features unusual in general aviation aircraft, aiming to combine comfort, high cruising speed, aerobatic capability and transoceanic range in a single compact machine. Among these are high wing loading, large internal fuel capacity, variable aileron incidence, double-slotted Fowler flap, automatic fuel tank switching, internal cowl flaps, and an all-flying T-tail.

NEW WELDING processes are dropping costs while providing improvements in weld quality. This paper describes some of the more promising new developments in pressure and fusion welding and brazing. Included in the discussion are ultrasonic, high frequency resistance, foil seam, magnetic force, percussion, friction, and thermopressure welding and diffusion bonding. The description of adhesive bonding includes the development of glass or ceramic materials as structural adhesives.*

To enable the tests required for development work to be performed with maximum efficiency, the Zwick Roell Group (ZwickRoell) – a global supplier of materials testing machines based out of Ulm, Germany – developed a materials testing machine that can be equipped with both a temperature chamber and a high-temperature furnace.

This paper presents a trade-off study to select a water separator system for a 3-man, 140-day, zero-g mission. Included is a summary of feasible concepts, a compilation of data on existing hardware, and a comparison of the performance characteristics of each with respect to the overall system. Six approaches to zero-g water separation were considered and are discussed: hydrophobic/hydrophilic screens; integrated condenser-water separators; centrifugal separators; cellular sponges; vortex separators; and elbow separators. Some of these techniques have high-performance characteristics with regard to water removal efficiency. However, when reduced to hardware, these same techniques may not integrate well with the overall system. The system selected was the integrated condenser-water-separator. This system requires no power, has no moving parts, and has a very small envelope.

X-ray is an indispensable aid in locating and determining the extent of incipient failures in structure which is inaccessible by position or covered by multiple layers of metal. It is also the most feasible method for checking oil coolers for contamination; bonded honeycomb panels for water; fuel lines for erosion; and with a 360 deg emission tube, fuselage frames for structural integrity without removing the interior upholstery and panels from the passenger compartment or cargo compartments.

Find out why you should attend the 2025 Noise and Vibration Conference and Exhibition.

This specification defines the requirements for joining metals and alloys using the gas-tungsten-arc welding (GTAW) methods.

This specification defines the requirements for joining metals and alloys using the gas-tungsten-arc welding (GTAW) methods.

This specification defines the requirements for joining metals and alloys using the gas-tungsten-arc welding (GTAW) methods.

This specification covers requirements for resistance spot and seam welding of the following metals and their alloys. Group 1 - Aluminum and magnesium Group 2 - Iron, nickel, and cobalt Group 3 - Titanium

This specification covers requirements for resistance spot and seam welding of the following metals and their alloys. Group 1 - Aluminum and magnesium Group 2 - Iron, nickel, and cobalt Group 3 - Titanium

This specification covers requirements for resistance spot and seam welding of the following metals and their alloys. Group 1 - Aluminum and magnesium Group 2 - Iron, nickel, and cobalt Group 3 - Titanium

This specification defines the procedures and requirements for joining metals and alloys using the electron-beam (EB) welding process.

This SAE Aerospace Recommended Practice (ARP) establishes procedures for estimating the weight of parts, weighing actual parts at time of manufacture and maintaining and collecting the weight data.

Premature wearout of augmentor hydraulic fuel pumps was being experienced in service on a fighter aircraft engine. The removal times ranged from 150 to 800 engine operating hours. Considerable effort had gone into the understanding of the physics of failure and overcoming this problem in a modified pump. However, there still remained the question of how best to proof test the new pump. The challenge was to demonstrate that the redesigned pump was significantly better than the old pump. The problems faced during design verification will be discussed in this case study. For example, does an accelerated test duplicate the service failure mode? When has an accelerated test run long enough to prove the redesign is in fact better than the old product? This paper illustrates the application of new technology to solve these research and development program problems through the use of Weibull and Weibayes Analysis.

Weber Metals Inc., a division of Otto Fuchs KG of Germany, unveiled a new, $180 million, 60,000-ton press at its 2.5-acre facility in Paramount, California, southeast of Los Angeles. It sets a record as the highest tonnage hydraulic forging press in the Americas and the largest privately funded forging press investment in the world.

Co+Cr2O3 is a composite coating of a cobalt matrix with 30 percent by volume embedded Cr2O3. The coating can be applied by plating using a suspension of Cr2O3 in a cobalt electrolyte. The mechanical properties of this coating are discussed. The main attribute is the excellent wear resistance of the coating especially in the temperature range of 300 to 700°C. Adhesive wear of unplated counterparts is reduced by the same amount. In contrast to nickel the fatigue strength of Co+Cr2O3 coated Waspaloy was shown to be not influenced, when heat treated at 400°C for 16 hours. Plated engine parts demonstrate the usefulness of the Co+Cr2O3 composite coatings for wear protection.