Applied Mechanics Commons^™

The Design And Construction Of A Flashlamp-Pumped Frequency-Doubled Dye Laser Applicable To Long Path Monitoring Of Air Pollutants, Joel Craig Johnson

Dissertations and Theses

The subject of this thesis is the development of a laser light source which could be used in an air pollution monitor to measure the average concentration of sulfur dioxide gas over long paths (>1 km). Many of the problems encountered in designing a long-path pollutant monitor such as instrument cost and reliability, the selection of an optimum spectral region for making the measurement, and light losses due to scattering and turbulence, are considered. The result of these considerations together with a survey of available laser light sources suggested that a frequency-doubled dye laser possessed several advantages over other …

Service And Spare Parts, D Hosken

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

Service is the preparation, delivery and after-sales maintenance of machinery. It involves responsibilities for both the dealer and the purchaser.

There's Little To Choose Between Scarifier Points, C R. Lester

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

Tests on scarifier points showed that methods of treating them to prolong their life had little effect.

Getting The Best From Tractor Tyres, J Quealy

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

The amount of pull a tractor develops depends largely on tyre efficiency and so with so many tyre size options for the one tractor model it is very easy to make the wrong decision on tyre fitment.

Tyre efficiency varies with tractor weight, soil conditions, inflation pressure and tyre size.

Hers we look at some of these factors and how changing them may affect efficiency.

Calibration Of Boom Sprays, J R. Peirce

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

Boom sprays have become increasingly common on Western Australian farms, allowing farmers to take advantage of modern herbicided.

Most boom sprays used on farms have 50 cm nozzle spacings and require calibrating regularily to ensure accurate herbicide application.

By following these steps, the boom will deliver accurate amounts of herbicide.

How To Select A Tractor, W T. Brown

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

A look at some of the factors to be considered when choosing a tractor for your farm. There is no one answer

Replacing Farm Machinery, R Crossman

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

In talking of machinery replacement it seems implied that the replacement items of plant are bigger and therefore better than their predecessers. It is also implied that plant replacement is becoming more costly.

Before any decision to replace machinery, the reason for replacement should be carefully considered.

There may be alternatives to the bigger and better solution.

Options For Machinery And Labour, A F. Herbert

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

Machinery is one of the highest costs in farming today. It is not unusual for capital investment in machinery to be 20 to 30 percent of the total investment in the farm.

On an annual basis, expenditure directly attributable to machinery can be 40 per cent or more.

This article cannon be a panacea for everyone to reduce machinery costs - each farm is different. But some of the issues might be of help.

Simplifying Lubricants For Farm Machinery, R A. Platt

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

All moving parts on machinery needs lubrication. With the rapid development in farm machinery and its attendant sophistifications, the stresses imposed on the lubricants have also increased.

This article looks at some of the changes in requirements and developments in lubricants available.

Matching Tractors And Implements, I W. Grevis-James

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

Tractor and implement matching involves balancing implement load characteristics with tractor output characteristics to obtain the best output from the combination. Too much or too little can be costly.

Crutching Cradles Can Work Well, N M. Marney, R. A. Mills

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

Crutching cradles allow successful do-it-yourself crutching if a continuous flow of sheep can be maintained. This article describes some units available and discusses costs.

The Development And Testing Of A Fluidic/Pneumatic Position Servo, David Lyle Portin

Dissertations and Theses

This thesis reviews the design and analysis of a fluidic/pneumatic position servo. Rolling diaphragm piston actuators are used for the system drive, and a hydrostatic gas journal bearing is used as the position sensor. The servo has a 1 inch range which is monitored using an electrical capacitive position transducer that was built as an integral part of the system.

Open-loop frequency response testing provides the basis for a mathematical model of the system.

The servo response is linear at frequencies up to 3 Hertz.

The frequency response appeared to be limited by the design of the gas bearing sensor, …

Effect Of Compliant Wall Motion On Turbulent Boundary Layers, Dennis M. Bushness, Jerry N. Hefner, Robert L. Ash

Mechanical & Aerospace Engineering Faculty Publications

A critical analysis of available compliant wall data which indicated drag reduction under turbulent boundary layers is presented. Detailed structural dynamic calculations suggest that the surfaces responded in a resonant, rather than a compliant, manner. Alternate explanations are given for drag reductions observed in two classes of experiments: (1) flexible pipe flows and (2) water-backed membranes in air. Analysis indicates that the wall motion for the remaining data is typified by short wavelengths in agreement with the requirements of a possible compliant wall drag reduction mechanism recently suggested by Langley. Copyright © 1977 American Institute of Physics.

The Analysis Of The Deflection And Containment Of A Hot Plume By Side Draft Exhaust Hooding, Douglas H. Macgowan

Dissertations and Theses

A common industrial ventilation and pollution problem results when a thermally buoyant polluted plume of air must be exhausted away from a work area to allow achievement of air pollution standards. Generally, a close fitting canopy hood is one of the most effective means of exhaust containment; however, physical restrictions or the operation itself often prevent such an arrangement, and a hood located to the side of the operation is required. This arrangement requires the exhaust to bend and contain the vertically rising plume with a horizontal sweep of exhaust air across the surface of the operation.

A review of …

Tree-Covered Land-Forms For Noise Control, David I. Cook, David F. Haverbeke

Nebraska Agricultural Experiment Station: Historical Research Bulletins

The objective of this study was to determine means for controlling intrusive noise by combining trees and shrubs with land-forms or other solid barriers. The solid barriers would provide some immediate relief, and the plant materials would increase the protection as they matured.

Historical Sketch Of Tractor Testing, Tractor Museum

Individuals Associated with the Nebraska Tractor Test

No abstract provided.

Faulty Germination Of Lupin Seeds, B J. Quinlivan

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

THE number of lupin seed samples tested in the seed laboratory over the last few years has shown a marked increase with the increasing popularity of lupins as a cash crop.

A seed with satisfactory germination is one which produces a healthy seedling. The germination of lupin samples tested in the laboratory has varied markedly.

Australian Tractor Test Report No. 58 : Massey-Ferguson 165, G H. Vasey, W. T. Brown

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

THE Massey-Ferguson 165 is a general purpose farm tractor. The test tractor gave 50 drawbar h.p. with 59 h.p. at the P.T.O. at rated engine speed it comes within Class 5 of the Australian Standard Classification of Wheeled Tractors for Agricultural Purposes, AS Dl 0-1967. It is equipped with 18.4 x 28 in. pneumatic tyres. It has a threespeed gear box with a ratio change giving 6 forward and reverse speeds.

Australian Tractor Test Report. No. 56. Zetor 5511, G H. Vasey, W. F. Baillie

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

AUSTRALIAN TRACTOR TEST REPORT

The Zetor 5511 is a general purpose farm tractor. With 43 drawbar horsepower and 51 h.p. at the P.T.O. at rated engine speed it comes within Class 5 of Australian Standard Classification of Wheeled Tractors for Agricultural Purposes, A.S. Dl0-1967. It is equipped with 18.4 x 28 pneumatic tyres.

It has a five-speed gear box with a High and Low ratio change giving 10 forward and 2 reverse speeds

Super Spreader Distributes Snail Baits, G D. Rimes, W. M. O'Donnell

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

THE problem of distributing snail bait on broad acres has been overcome by simple modifications to a conventional super spreader.

The Setting And Control Of Disc Ploughs, P A. Taylor

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

THE trailed disc plough is the most commonly used tillage implement in Australian broadacre farming, yet it is considered in some areas to be difficult to set and to operate. These notes provide information resulting from C.S.I.R.O. research to assist operators in the control and operation of trailed disc ploughs.

How Many Acres Per Hour?, J G. Drever

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

MANY farm tractor operators don't know exactly how much land is covered in an hour by implements drawn by their tractors. This information, useful on any farm where tractors are used, is of particular value in contract work.

The capacity of the machine or implement, or in other words, its rate of working, depends on the width of the machine, how fast it travels, how efficiently it is operated and the time it works.

Australian Tractor Test Report No. 53 : Chamberlain Countryman 354, G H. Vasey, W. F. Baillie

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

AUSTRALIAN TRACTOR TEST REPORT

No. 53 - CHAMBERLAIN COUNTRYMAN 354

THE Chamberlain Countryman 354 is a broad-acres cultivation tractor of 77 drawbar horsepower with 87 h.p. at the P.T.O.

Australian Tractor Test Report No. 54 : Fiat 615, G H. Vasey, W. F. Baillie

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

AUSTRALIAN TRACTOR TEST REPORT

No. 54 - FIAT 615

The tractor is designed for working either with mounted implements directly through the three-point linkage or through the drawbar.

Four Mobile Picking And Pruning Platforms For Orchards, J C. Rowbotham

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

Shifting ladders around the orchard takes a great deal of time and effort at picking and pruning time.

This article describes four home made labour savers which take most of the ladder work out i f these operations.

Australian Tractor Test Report No. 52 : Chamberlain Champion 306, G H. Vasey, W. F. Baillie

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

AUSTRALIAN TRACTOR TEST REPORT

No. 52 - CHAMBERLAIN CHAMPION 306

THE Chamberlain Champion 306 is a general purpose farm tractor of 57 drawbar horsepower with 68 h.p. at the P.T.O.

Australian Tractor Test Report No. 55 : Nuffield 4/65, G H. Vasey, W. F. Baillie

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

THE Nuffield 4/65 is a general purpose farm tractor of 49 drawbar horsepower.

With 54 h.p. at the P.T.O. at rated engine speed it comes within Class 5 of the Australian Standard Classification of Wheeled Tractors for Agricultural Purposes, AS D10-1967. I t is equipped with 18.4 x 30 pneumatic tyres.

It has a five speed gear box with a High and Low ratio change giving 10 forward and 2 reverse speeds.

Australian Tractor Test Report No. 49 : Mccormick International 624, G H. Vasey, W. F. Baillie

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

AUSTRALIAN TRACTOR TEST REPORT

No. 49 - McCORMICK INTERNATIONAL 624

Eight Tractors In The 35-45 H.P. Class. Part 2, W F. Baillie, G. H. Vasey

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

Summary report of tests on tractors in the 35-45 h.p. class by the Australian Tractor Testing Committee, based on Tractor Tests Nos. 38 to 45.

Eight Tractors In The 35-45 H.P. Class. Part 1, W F. Baillie, G. H. Vasey

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

Summary report of tests on tractors in the 35-45 h.p. class by the Australian Tractor Testing Committee, based on Tractor Tests Nos. 38 to 45. Part 1