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| Title: | Advanced Flight Control & Electronic Display Systems For All-Weather Flight Operations: A Literature Review & Bibliography | ||||
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| Author: | Jack J. Shrager | ||||
| Abstract: | A review of all literature published since 1967 relating to aircraft flight controls and displays was made. Special emphasis was placed on the contents of those documents as they related to the all-weather landing and takeoff operational envelope. The results of this review are evaulated, summarized, and conclusions drawn. This is suppllemented by an annotated bibliography and author's index. | ||||
| Report: | FAA-EM-74-12 | Pages: | 145 | Size: | 32.5 MB |
| Title: | Full Scale Aircraft Cabin Flammability Tests Of Improved Fire-Resistant Materials | ||||
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| Author: | Robert N. Stuckey, Daniel E. Supkis, James Price | ||||
| Abstract: | Full-scale aircraft cabin flammability tests to evaluate the effectiveness of new fire-resistant materials by comparing their burning characteristics with those of older aircraft materials are described. Three tests were conducted and are detailed. Test 1, using pre-1968 materials, was run to correlate the procedures and to compare the results with previous tests by other organizations. Test 2 included newer, improved fire-resistant materials. Test 3 was essentially a duplicate of test 2, but a smokeless fuel was used. Test objectives, methods, materials, and results are presented and discussed. Results indicate that the pre -1968 materials ignited easily, allowed the fire to spread, produced large amounts of smoke and toxic combustion products, and resulted in a flash fire and major fire damage. The newer fire-resistant materials did not allow the fire to spread. Furthermore, they produced less smoke, lower concentrations of toxic combustion products, and lower temperatures. The newer materials did not produce a flash fire. _ | ||||
| Report: | NASA TMX-58141 | Pages: | 64 | Size: | 21.7 MB |
| Title: | The Measurement Of The Boeing 747 Trailing Vortex System Using The Tower Fly-By Technique | ||||
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| Author: | Leo J. Garodz, David Lawrence, Nelson J. Miller | ||||
| Abstract: | The characteristics of the trailing vortex system of the Boeing 747 airplane have been investigated by the National Aviation Facilities 'Experimental Center (NAFEC) Atlantic City N. J.t during a series of flight tests conducted in September and October 1972. This investigation is part of a long-term programt started in February 1970 with flight tests conducted by NAFEC at the Atomic Energy Commission site at Idaho Fallst Idahot devoted to the study of the overall wake turbulence problem. The present tests were conducted using improved flow measurement and meteorological instrumentationt permitting greater resolution than had been possible in earlier testing. Principal findings were that the peak tangential velocity decays as the reciprocal of the square root of the time elapsed since vortex generation; that the peak velocity is unaffected by the throttling back of the adjacent outboard engine; and that the lateral transport velocities correlate quite well with theory. Vortex descent'rates did not correlate with theorYt being up to three times greater than theoretical values. It was further determined that the velocity distribution in the Bo_ing 747 trailing vortices is strongly affected by the wing flap setting. At small settingst the vortex core diameter is small and peak tangential velocities are hight and as the flap deflection is increasedt the core diameters increase and peak velocities diminish. | ||||
| Report: | FAA-RD-73-156 | Pages: | 248 | Size: | 38.5 MB |
| Title: | A Summary Of Helicopter Vorticity And Wake Turbulence Publications With An Annotated Bibliography | ||||
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| Author: | Jack J. Shrager | ||||
| Abstract: | A review of all literature published since 1964 relating to helicopter vortex systems nd wake turbulence was made. The results of this review are evaluated and summarized, and conclusions are drawn relative to that review. The documents are grouped in general catergories, and this is further supplemented by an annotated bibliography and authors index. Also incorporated in the review is a comparative analysis of rotary-wing versus fixed-wing circulation intensity time-history. | ||||
| Report: | FAA-RD-74-78 | Pages: | 170 | Size: | 32.9 MB |
| Title: | Low Density Polybenzimidazole Foams | ||||
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| Author: | D.A. Kourtides, J.A. Parker, C.L. Segal | ||||
| Abstract: | Aromatic polybenzimidazole (PBI) foams in the density range of 24-80 kg/m3 produced by controlled thermal cross linking of the prepolymer have been developed and shown to have excellent thermophysocal properties, fire resistance and low smoke evolution when exposed to heat or flame; they also retain their mechanical properties up to 473 degree K without any significant degradation. In addition to superior thermal properties, these foams maintain a high degree of flexibility, a good modulus to weight ratio as well as a high strength to weight relationship. Consequently, these combinations of excellent thermal and mechanical properties make this foam an attractive candidate for aircraft fire barriers and space shuttle thermal insulation where the combination of low weight and high temperature insulation is critical. This paper describes the relationship between prepolymer purity, processing parameters and additives to the thermophysical properties of these foams. Studies included the addition of surefactants and fibers and variations in the cure and postcure schedules. It was determined that foam properties were effected by differences in prepolymer purity, curing schedule and the presence of solid additives in the foam. A direct relationship between the amount of fiber, additive and resultant foam density was established. High temperature compressive performance was improved by postcuriing at 800 degree K. Surfactant additives were found to improve the uniformity of cell size. Foams were characterized as to their ambient and high temperature compressive strength and modulus, density, porosity, thermal conductivity and efficiency and other thermal properties. Studies were conducted to determine the effect of prepolymer purity on foam properties with the aim of utilizing low cost prepolymers to produce these foams. It was concluded that foams made from prepolymer having an ortho-diamine purity of 95% had approximately the same properties as foams made from higher purity and cost prepolymer. |
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| Report: | FSR-0053 | Pages: | 12 | Size: | 862 KB |
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