Engineering Commons^™

Australian Tractor Tests : Report On Test No. 32, G H. Vasey, W. F. Baillie

Journal of the Department of Agriculture, Western Australia, Series 4

THIS Report is taken from the full Technical Report No. 32 of this test: test results are shown here in briefer form: fuller explanations are added. Values quoted may be rounded out to two instead of three significant figures:

Getting The Best From Your Sewing Machine, O. Evans Scott

Journal of the Department of Agriculture, Western Australia, Series 4

"NEXT to the plough, this is perhaps humanity's most blessed instrument." (Louis Antoine Godey.)

In some homes the sewing machine is the most sadly neglected and ill-used servant. It is often left set up, exposed to dust, dampness and scratching, used as a table and otherwise abused.

It is not right to have a machine stitching imperfectly and noisily and used for long periods without maintenance when a little attention can keep it performing quietly and efficiently.

A New Type Of Seed Bed Cover For The Market Garden, R R. Bell, M. Hardie

Journal of the Department of Agriculture, Western Australia, Series 4

ALL market gardeners use seed beds in their gardening programme. However, the basic design of seed beds and covers has not greatly altered over the years.

The availability of cheap good quality plastic materials has now shown the way to improvements in the design of this type of gardening equipment.

A Crush For Tuberculin Testing Of Cattle, A L. Ripper

Journal of the Department of Agriculture, Western Australia, Series 4

ALWAYS a useful asset on any farm where livestock are kept, a strongly-constructed crush is essential where tuberculin testing makes it necessary to deal with dry stock, bulls and young animals that have not been previously handled.

The crush described in this article was specially designed for tuberculin testing, but will serve equally well for vaccinating, branding, de-horning or any operation where restraint is necessary.

Let's Look At Herringbone Dairies, R A. Bettenay, F. Fielder

Journal of the Department of Agriculture, Western Australia, Series 4

THE first of the modern type herringbone dairies in Western Australia was constructed by Mr. F. Tucker of Ruabon, in 1957.

Since then there has been strong interest in this system, and there are now at least six such sheds operating in the district between Ludlow and Augusta. Many more are being constructed.

A Study Of The Dissolution Of Hafnium In Hydrofluoric Acid, James W. Johnson

Doctoral Dissertations

"The purpose of this investigation was to obtain kinetic and electrochemical information concerning the reaction of hafnium with hydrofluoric acid in order to establish the mechanism of dissolution. This included the determination of dissolution rates, the difference effect, and dissolution potentials of hafnium in hydrofluoric acid"--Abstract, page 1.

Effects Of Calcining Temperature On The Physical Properties Of Zirconate Ceramics, P. D. Ownby

Materials Science and Engineering Faculty Research & Creative Works

No abstract provided.

Model Analysis Of Spillway And Stilling Basin Of Porcupine Dam, Gordon H. Flammer, C. Earl Israelsen

Reports

Introduction: The Engineering Experiment Station at Utah State University was engaged by the Utah Water and Power Board to make a model analysis of the spillway and stilling basin of the Porcupine Dam. This dam will be located on the East Fork of Litle Bear River, just east of Avon, Utah. It will be approximately 650 feet long and 160 feet high, composed of zones earth fill with rock rip-rap facing. The spillway will have a reinforced concrete inlet section and the remainder of the chute and stilling basin will be excavated out of the rock and leck unlined. The …

A Rational Approach To The Estimation Of Evaporation And Evapotranspiration From Climatological Data, Jerald Emmet Christiansen, B. B. Patil

Reports

Many attempts have been made to derive mathematical expressions relating evaporation and evapotranspiration, or consumptive use, to climatological data. IN the United States, the Blaney-Criddle formula is probably the best known for estimating consumptive use (2 and 3). Blaney (1) has also suggested that this formula is suitable for estimating evaporation as measured with a Weather Bureau pan. Other well known formulas are the Penman formulas (10), the Thornthwaite formula (15) and the Hargreaves formulas (8). Halkias, Beihmeyer and Hendrickson (6) suggest that water requirements of crops can be determined from atmometer data. Lowry and Johnson (() in an early …

Test 804: Ursus C-325 (Diesel), Nebraska Tractor Test Lab

Nebraska Tractor Tests

EXPLANATION OF TEST REPORT GENERAL CONDITIONS East tractor is a production model equipped for common usage. Power consuming accessories can be disconnected only when it is convenient for the operator to do so in practice. Additional weight can be added as ballast if the manufacturer regularly supplies it for sale. The static tire loads and the inflation pressures muse conform to recommendations in the Tire Standards published by the Society of Automotive Engineers. PREPARATION FOR PERFORMANCE RUNS The engine crank case is drained and refilled with a measured amount of new oil conforming to specifications in the operator’s manual. The …

Test 808: Massey-Ferguson Mf-65 Dieselmatic, Nebraska Tractor Test Lab

Nebraska Tractor Tests

EXPLANATION OF TEST REPORT GENERAL CONDITIONS East tractor is a production model equipped for common usage. Power consuming accessories can be disconnected only when it is convenient for the operator to do so in practice. Additional weight can be added as ballast if the manufacturer regularly supplies it for sale. The static tire loads and the inflation pressures muse conform to recommendations in the Tire Standards published by the Society of Automotive Engineers. PREPARATION FOR PERFORMANCE RUNS The engine crank case is drained and refilled with a measured amount of new oil conforming to specifications in the operator’s manual. The …

Test 800: John Deere 2010 Ru Gas, Nebraska Tractor Test Lab

Nebraska Tractor Tests

No abstract provided.

Test 801: John Deere 1010 C Gas, Nebraska Tractor Test Lab

Nebraska Tractor Tests

No abstract provided.

Test 803: John Deere 1010 Ru Diesel, Nebraska Tractor Test Lab

Nebraska Tractor Tests

No abstract provided.

Test 802: John Deere 1010 Ru Gas.Pdf, Nebraska Tractor Test Lab

Nebraska Tractor Tests

No abstract provided.

A Geophysical Investigation Of An Area In Christian County, Missouri, Edwin J. Ballantyne Jr.

Masters Theses

"A vertical intensity magnetic survey of 144 square miles in Christian County, southwest Missouri revealed an 825 gamma anomaly having a closure of 9 square miles. A three mile gravity traverse across the magnetic anomaly detected a positive gravity anomaly in excess of six mllligals.

Calculations showed that a Precambrian hill large enough to cause the observed magnetic anomaly would outcrop at the surface. Because Precambrian rocks are known to be buried under a sedimentary layer, this hypothesis was rejected.

Theoretical anomalies of several geometrical bodies at calculated depths were visually compared with the measured magnetic and gravity profiles. A …

Effect Of Boundary Layer Control, Through Spiral Cuts, On The Film Coefficient Of Convective Heat Transfer, Nicholas W. Barre

Masters Theses

"This thesis is experimental investigation into the possibility of obtaining an increase in the forced convection heat transfer coefficient for a pipe by passing the fluid through a narrow spiral cut in the pipe.

Different spiral pipes with pitches of two, four, eight, ten, sixteen, and twenty inches were used; however, the width of the spiral cut remained unchanged at 3/16 of an inch. Several mass flow rates for water were used up to a maximum of 1536 lbs/hr for each run.

One of the objectives was to find which pitch would give the highest heat transfer rate for a …

A Study Of The Transient State Of Transpiration Cooling, William C. Wolkenhauer

Masters Theses

"This thesis is a successful attempt to show a new approach to the transpiration cooling problem. Transpiration cooling has long been known as an effective way of removing heat from porous material.

It is shown here that transpiration cooling from a porous material, assuming a temperature difference between the coolant and the porous material, is less effective than where the coolant within the pores is assumed to be at the same temperature as the material adjacent to the pore. Previous investigators made the latter assumption.

The specific problem considered here is that of a uniform, porous plate with constant physical …

Preliminary Study Of An Optimum Vibration Absorber For A Multi-Mass System With Multiple Excitation, John Raymond Burrows

Masters Theses

"The object of this thesis is to demonstrate, by the use of a modern digital computer, a fast, efficient method to eliminate or minimize undesirable stress conditions in a multimass vibrating system with multiple excitation. The condition desired is obtained by the addition of an optimum tuned and damped dynamic vibration absorber, for one critical speed only.

Maximum stress is the criteria used for design here and not amplitude as has been used previously by all other authors.

This solution requires the applied torque to be reevaluated as an average torque and a number of half integer harmonics. This method …

The Analysis, Construction, And Calibration Of An Electronic Vibrations Amplifier, Jimmie D. Howard

Masters Theses

"Vibrations analysis necessitates having a device capable of performing some initial phase of detection. The vibration amplifier presented in this thesis performs such an initial aid to analysis by detecting amplitudes of vibrations of varying magnitudes and frequencies. This is accomplished by utilizing a Piezoelectric crystal vibration pickup to obtain an acceleration wave form. Two operational amplifiers perform integrations of the acceleration to obtain displacement. A calibrated meter within the device provides a method of determining magnitudes of displacement. Recording instruments such as the Brush recorder or an oscilloscope may also be used"--Abstract, page ii.

Isothermal Decomposition Of Austenite (In 1.4% Tungsten Steel) At Subcritical Temperatures, Samir Moustafa Riad

Masters Theses

"An experimental investigation was conducted in order to study the relationship between temperature, time and the decomposition of austenite in Tungsten steel of a given composition - and to plot the T-T-T Diagram for this steel.

The steel was prepared, homogenized and cut into identical specimens for further heat treatment and metallographic inspection. Precautions were taken to prevent these specimens from decarburizing during any heat treatment.

This experimental work may be divided into three main parts:-

I. Determination of the critical temperature range; i.e. the range of temperature Ae₁ and Ae₃ above which austenite is stable and below …

Transpiration Cooling Of A Plane Porous Plate, Raymond George Posgay

Masters Theses

"The transient temperatures were determined in a porous plate for one dimensional heat flow and one dimensional counter coolant flow. One surface of the porous plate was heated by a hot gas by convective heat transfer. A general discussion of the problem is considered and the procedure described for working all such problems dealing with transpiration cooling.

The solution of such problems is illustrated by two examples employing a ceramic plate one inch thick and cooled by a uniform flow of air in a direction counter to the flow of heat, while one surface of the ceramic plate was heated …

Investigation Of Vertical Internal Spillways, Paul R. Munger

Masters Theses

"This investigation resulted in the development of a means of predicting the discharge of water through an internal spillway type rockfill dam. From the data obtained during the various tests, equations were developed by which the coefficient of discharge for an internal spillway type rockfill dam can be determined when the core height, rock size and head causing flow are known. The equations give results with an error of less than 5%, which is adequate for engineering works"--Abstract, page 2.

Transient Temperature Distribution In Solid Sphere Subjected To Radiation Heat Exchange, William H. Stocklin

Masters Theses

"The author believes that numerical analysis is the most feasible approach to calculating the transient temperature distribution in a solid sphere subjected to various surface conditions; heat flow within the sphere is radial.

Numerical analysis is employed to arrive at a series of equations for calculating the transient temperature at selected points of a solid sphere. A study is made to determine a method for calculating temperatures with these equations; a computing device is found to be the most practical method for this purpose. The equations for temperatures at internal points of the solid sphere are general.

The equations have …

The Effect Of The Ultraviolet Portion Of The Sun Spectrum On Chlorine Residuals In Water Supplies, Tumkur Mohmed Ameer Ahmed

Masters Theses

"The effect of sunlight on chlorine residuals in water supplies was investigated to provide original and basic information of value to the water purification field.

Three different water systems were employed: (a) The Simplified Water System, (b) The Ground Water System, and (c) The Surface Water System. The RS Sunlamp provided an appropriate source of ultraviolet radiation. A 10 mg/1 chlorine concentration was used. The pH values of 7 and 10 and the illumination intensities of 145 and 200 foot candles were employed. Iodometric determination of chlorine residuals was the main parameter used.

It was found that the chlorine residuals …

Analyses Of Two New Electrode Configurations For Earth Resistivity Surveying, Chi-Chao Chang

Masters Theses

"Two new electrode configurations for the electrical resistivity- surveying are introduced: the A-configuration, consisting of a closely spaced pair of current electrodes separated at larger distance from the closely spaced pair of potential electrodes, and the B-configuration, in which each closely spaced pair consists both current and potential electrode. Because electrode pairs can be carried as units, the new configurations can be applied to continuous resistivity surveying more easily than the Wenner configuration....

Theoretical apparent resistivity values are derived, by Maxwell's theory of images, for the A- and B-configuration over a two layered earth using the depth probe method, and …

Design Of A Square Loop Magnetic Integrating Device, Fred Leland Grismore Jr.

Masters Theses

"The problem investigated in this research was the development of a static integrating circuit applicable to closed loop feedback control systems. Investigation of various methods of attack indicated that square loop magnetic cores offered characteristics required for the integration process. These include the ability to sum input information and the ability to store information for an indefinite period of time.

An experimental program was carried out, investigating the various properties of square loop magnetic materials and required design parameters. Through this work it was verified that the process of integration could be realized by using the partial switching volt-second absorption …

An Investigation Of The Factors Influencing The Design Of A Dense Prilled Ammonium Nitrate-Fuel Oil Mixture, Robert Bartley Hopler Jr.

Masters Theses

"The physical characteristics of dense ammonium nitrate prills were examined. The density was found to be 1.52 grams per cubic centimeter, and from this the specific surface was calculated for the size fractions of interest in the investigation. Theoretical loading densities were calculated for between 26.0 and 47.6 percent voids.

The explosive properties of discrete particle size fractions were investigated. The equation by Clark was found to predict the detonation velocity of the sizes smaller than 8/20 mesh. The equation by Cook could not be applied to dense prilled ammonium nitrate. The possibility of a very oxygen negative condition existing …

Underground Methods Of Working Coal, Hemendra Nath Datta

Masters Theses

"'Underground Methods of Working Coal' is the subject of this thesis. It is the purpose of this investigation to summarize all the mining methods under various conditions of working.

The underground methods of mining have been classified under three headings; viz., (a) Room and Pillar, (b) Longwall and (c) Horizon Mining. The conditions suitable for the applicability of each system and their relative merits and demerits are fully discussed.

The principles of the design of the workings of both room and pillar and longwall systems to have effective roof control in the area of the workings are pointed out.

Distinct …

A Resistivity Study Of Hot Short Ferrous Alloys, Harold Alfred Koelling

Masters Theses

"Resistivity measurements were performed at elevated temperatures on four special ferrous alloys and one commercial iron. The alloys were pure iron, iron with .023 per cent sulfur, iron with .33 copper, iron with .32 copper and .024 sulfur. Other elements were held to the minimum amounts possible in order to determine the actual effects of sulfur and copper. The commercial alloy was Armco Iron.

Measurements of resistivity versus temperature were taken at slow heating rates to determine if the iron sulphide liquid film formed in the grain boundaries of red-short steels had any effect on the electrical resistivity"--Abstract, page 7.