Analysis of driver control movements on a limited-access divided highway

This report presents an analysis of basic contral movements (steering wheel, accelerator pedal and brake) obtained in approximately 5,500 miles driving on a limited-access divided highway, using fourteen volunteer subjects (ten men and four wamen). It is shown that the frequency and magnitude of steering wheel movements (reversals) are dependent...

Analysis of flight loads during low-altitude pipeline patrol operations: final report

This report presents an analysis of 1135 hours data from counting accelerometers installed in three Piper Aztec aircraft employed on pipeline patrol operations in Canada. Flight tests were also made to determine the magnitude of the stresses in the wing main spar over a range of normal acceleratians. The frequency distribution of normal...

Low altitude flight load spectra for light aircraft

An analysis is presented of more than 1, 300 hours flight loads records oblained from light aircraft engaged in low altitude terrain-following operations. It is shown that continuous operation in tbe average low attitude environment reduces the estimated fatigue life by a factor of 15 to 1 when compared with thc normal operating environment, and...

Analysis of flight acceleration records from aircraft engaged on pipeline inspection operations; interim report

Records of normal accelerations at the centre of gravity were obtained from three Piper Aztec aircraft engaged on pipeline inspection operations over Eastern and Central Canada . Six hundred and forty- six hours recording time have been analyzed to date, and the work is continuing. Aerial pipeline inspection peet ion operations impose an average...

Analysis of V-G-H records from an aircraft engaged on aerial survey operations over mountainous terrain

V-G-H records were obtained from an aircraft of 7,500 lb . gross weight engaged on low-level terrain-following aerial survey operations over the Yukon Territory . Operations of this nature impose a severe load spectrum on the aircraft, which results in a serious reduction in estimated fatigue life when compared with that obtained during normal...

Fatigue life of the CF-100 aircraft

A description is given of the derivation of test loads and design of the loading systems for a full-scale fatigue test on a CF-IOO aircraft. The test procedure and the events leading up ta catastrophic failure of the wing trans port joint are a150 described . The test result is ioterpreted to show that potentially dangerous cracks in the wing...

The influence of cohesive forces on the glass transition temperatures of polymers

An apparatus for measuring the thermal emissivity of metal surfaces and surface finishes at low temperatures

An apparatus for measuring the thermal emissivities of metal surfaces and surface finishes at low temperatures is described. The principle of the design is to measure the rate of cooling at a known temperature; the emissivity may then be calculated from the Stefan-Boltzman law of radiation. Some typical results of emissivity measurements on...

The N.A.E. procedure for the analysis of aircraft V-G-H records

This report describes the procedure currently in use at the National Aeronautical Establishment in the evaluation and analysis of aircraft V-G-H records. Data reduction is performed on a high-speed digital computer. Electronic sorting techniques are used in the final printing and classification of the output data.

Thermal emissivities of some metallic and non-metallic surfaces over the range of temperature 70º C to 250º C

Thermal emissivities of some metallic surfaces, of various metallic surface treatments and of non-metallic (paint) finishes have been measured over the temperature range 70°C to 250°C. The emissivities of polished and vapour-blasted metallic surfaces were found to be low, whilst anodised aluminium gave high values. All the paint finishes tested...

An apparatus for measuring the thermal emissivity of metal surfaces and surface finishes

An apparatus for measuring the thermal emissivity of metal surfaces and surface finishes is described. The principle of its design is the comparison of the rate of cooling of the surface at a known temperature with that of a theoretical black body radiating at the same temperature. The apparatus in its present form provides emissivity values...

Vertical accelerations encountered by aircraft on agricultural operations

Three Boeing A-75N-1 aircraft (Stearman), operated by Wheeler Airlines, were fitted with NRC Registering G-Meters in order to obtain data on vertical accelerations encountered during agricultural operations. Records were obtained from two aircraft only, covering a period of 60 flying hours, the aircraft being engaged in forest-spraying...

Atmospheric turbulence encountered by a Britannia aircraft on Polar and North Pacific routes

V-G-H records we re obtained from a Britannia 314 air craft operating on regular scheduled service between Vancouver and Amsterdam (Polar route) and Vancouver and Hong Koog (North Pacific route). Records were obtained over a period of 186 flying hours, between May and December 1960 . Since the collection of data is still proceeding, the results...

Atmospheric turbulence encountered by a Fairchild C-119 aircraft over the Canadian arctic

V-G-H records were obtained from a Fairchild C-119 aircraft operating between Thule, Greenland and Alert, Ellesmere Island, covering a period of approximately 50 flying hours between 31 July and 11 August 1960. From the limited number of records obtained, it would appear that the frequency of occurrence of vertical gusts exceeding 10 feet per...

A probability analysis of coincident gust and manoeuvre loads in low-flying aircraft

The basic data used in this analysis refer to an aircraft of 30,000 pounds A.U.W., a mean aerodynamic chord of 10.4 feet, and a wing loading of 55 pounds per square foot. The aircraft is assumed to be travelling at 350 knots at an altitude of 500 feet. The mathematical problem was to obtain the frequency distribution of the joint occurrence or a...