Honeycomb-laminate composite structure

A honeycomb-laminate composite structure was comprised of: (1) a cellular core of a polyquinoxaline foam in a honeycomb structure, and (2) a layer of a noncombustible fibrous material impregnated with a polyimide resin laminated on the cellular core. A process for producing the honeycomb-laminate composite structure and articles containing the honeycomb-laminate composite structure is described

A flight investigation of simulated data-link communications during single-pilot IFR flight. Volume 2: Flight evaluations

Key problems in single pilot instrument flight operations are in the management of flight data and the processing of cockpit information during conditions of heavy workload. A flight data console was developed to allow simulation of a digital data link to replace the current voice communications stem used in air traffic control. This is a human factors evaluation of a data link communications system to determine how such a system might reduce cockpit workload, improve flight proficiency, and be accepted by general aviation pilots. The need for a voice channel as backup to a digital link is examined. The evaluations cover both airport terminal area operations and full mission instrument flight. Results show that general aviation pilots operate well with a digital data link communications system. The findings indicate that a data link system for pilot/ATC communications, with a backup voice channel, is well accepted by general aviation pilots and is considered to be safer, more efficient, and result in less workload than the current voice system

Characterization of wear debris generated in accelerated rolling-element fatigue tests

A ferrographic analysis was used to determine the types and quantities of wear debris generated during accelerated rolling contact fatigue tests. The five-ball rolling contact fatigue tester was used. Ball specimens were made of a corrosion resistant, high-temperature bearing steel. The lubricant was a superrefined naphthenic mineral oil. Conditions included a maximum Hertz stress of 5.52 10 to the 9th power Pa and a shaft speed of 10,000 rpm. Four types of wear debris were observed: (1) normal rubbing wear particles, (2) fatigue microspall particles, (3) spheres, and (4) friction polymer deposits. The characterization of wear debris as a function of time was of limited use in predicting fatigue failures in these accelerated tests

Ferrographic analysis of wear debris generated in accelerated rolling element fatigue tests

The types and quantities of wear particles generated during accelerated ball rolling contact fatigue tests were determined. Ball specimens were made of AMS 5749, a corrosion resistant, high-temperature bearing steel. The lubricant was a super-refined naphthenic mineral oil. Conditions included a maximum Hertz stress of 5.215 times 10 to the 9th power Pa and a shaft speed of 10,000 rpm. Four types of wear particles were observed; normal rubbing wear particles, fatigue spall particles, spheres, and friction polymer

Thermal model of a 75 watt/e/ space power planar RTG system

Planar type radioisotope thermoelectric generator with beryllium plate for spacecraft powe

A Tribute to A.L. Philpott

In 1973 I served in my first session of the General Assembly of Virginia. Prior to leaving for Richmond, I was advised to keep my mouth shut and to never, never raise the ire of A.L. Philpott. We had some problem in Mecklenburg County, and I introduced legislation to address it. As the bill was called on second reading, I shuddered as Mr. Philpott rose and asked the Speaker if I would yield for a question. He asked: Does the gentleman realize the bill is in violation of the Constitution of Virginia? Since I am not an attorney, I had no idea that this was the case. He proceeded to expand his questions. At the end of his statement he asked the Speaker if I would allow this measure to go by for the day. I don\u27t know if I have ever been happier. As I sat down, A.L. was standing by my seat offering amendments to correct the flaws in my bill

A flight investigation of simulated data-link communications during single-pilot IFR flight. Volume 1: Experimental design and initial test

A Flight Data Console simulation of a digital communication link to replace the current voice communication system used in air traffic control (ATC) was developed. The study determined how a digital communications system reduces cockpit workload, improve, flight proficiency, and is acceptable to general aviation pilots. It is shown that instrument flight, including approach and landing, can be accomplished by using a digital data link system for ATC communication

Observing Reef Fishes from Submersibles Off North Carolina

During August and September 1979, the submersibles JOHNSON SEA LINK-II and NEKTON GAMMA were used to observe fishes at 13 reefs in Raleigh, Onslow, and Long Bays, N.C., at depths ranging from 23 to 152m. Reefs with the highest profile (up to 10m) and in depths of 52 to 92 m exhibited the greatest fish species richness and abundance, while adjacent sandy areas were usually barren of fishes. Estimates of recreationally and commercially important reef fishes were 61/ha (S.E. 59.9) over sand and 774/ha (S.E. 748.1) over reefs, with considerable variation between stations. Ninety-nine species in 35 families were observed. Most numerous were Holocentridae, Serranidae, Priacanthidae, Haemulidae, Sparidae, Sciaenidae, Chaetodontidae, Pomacentridae, and Labridae. Many tropical species previously thought to be rare off North Carolina were abundant

Constructive Cash Distributions in a Partnership: How and When They Occur

Constructive cash distributions to partners with possible concomitant severe tax impact can occur whenever a partners share of firm or individual liabilities is cut. This reduction of liabilities can be triggered by a variety of typical partnership transactions. Messrs. Parker arid Lee analyze those transactions under which there is the danger of unforeseen taxation and urge extreme caution

Retroactive Allocations to New Partners: An Analysis of the Area after Rodman

In the recent Rodman case, the Tax Court has held that a partner newly admitted near year-end must report his share of the full year\u27s partnership profits. Messrs. Lee and Parker analyze the status of retroactive partnership allocations in view of Rodman, the first decision to expressly sanction retroactive allocations of income (and implicitly of losses) to new partners, and reallocations under Section 704