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Filtering by: Decade 1970-1979 Remove constraint Decade: 1970-1979 Degree Name Master of Forestry (M.F.) Remove constraint Degree Name: Master of Forestry (M.F.)

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Production rates of skyline, balloon, and helicopter yarding systems from gross time study analysis

Creator:

Curtis, Richard James

Abstract:

This paper describes the analysis of data from a three-year gross time study of skyline, balloon, and helicopter yarding systems operating in Western Oregon. Data collection activities were designed and supervised by the Pacific Northwest Forest and Range Experiment Station, U.S.D.A. Forest Service. The specific logging systems studied were running...

Resource Type:

Capstone Project
Mass wasting in forested mountain topography

Creator:

Hu, Su Cherng

Abstract:

As the demands for forest products increase, additional timber harvesting operations can be expected on steep mountainous terrain, The resulting disruption of natural slope stability by man's disturbances (roadbuilding, logging and vegetative manipulation, etc.) may also accelerate mass movement processes in this terrain. Swanston (1969) defines mass movement as ".,...

Resource Type:

Capstone Project
An analysis of the slackpulling forces encountered in manual thinning carriages

Creator:

Iff, Ronald H.

Abstract:

The popularity of gravity-return skyline logging systems is now increasing in the Western United States. Simplicity seems to be the basis for their success. While two drum yarders are most commonly used, ·some systems, such as the Wyssen, use only a single drum for yarding. Carriages commonly used with these...

Resource Type:

Capstone Project
A case study of prebunching and swinging : a thinning system for young forests

Creator:

Kellogg, Loren D.

Abstract:

Commercial thinning young growth forests is an increasingly important silvicultural technique for improving second growth management of Douglas-fir stands. Research aimed at advancing the efficiency of skyline logging operations in small wood timber stands is essential in order to make thinning these young stands economical. The purpose of this study...

Resource Type:

Capstone Project
Skyline logging production in the southern Sierra Nevada mountains: a case study

Creator:

Mann, John William

Abstract:

This paper describes the results of a time study conducted on the Sierra National Forest to determine production capacity of the Madill 044 Skyline Yarding Crane operating in a partial cut situation for old-growth mixed conifer stands. The yarder was rigged in the running skyline configuration and used a Danebo...

Resource Type:

Capstone Project
A force analysis of directional falling

Creator:

McRae, James Robert

Abstract:

Environmental concerns have prompted the need for reviving an old art: controlled felling. The methods currently used, jacking and lining, present new and varied problems for the faller in today's environment. One of the major concerns of the faller is the purpose of this paper what kind of forces are...

Resource Type:

Capstone Project
Silvicultural mechanical site preparation

Creator:

Moore, William Wardlaw

Abstract:

The preparation of suitable sites for planting and growing of tree seedlings following logging is recognized by British Columbia Forest Service as a major silvicultural problem in the Central and Northern Interior regions of the province. Over the past few decades, scarification trials have been made with various types of...

Resource Type:

Capstone Project
The production potential of the Ingland-Jones Trailer Alp yarder in thinning young growth northwest conifers: a case study

Creator:

Neilson, Dennis Albert

Abstract:

Results of a recent production study indicate that a four man crew thinning young growth Douglas-fir [Pseudotsuga mensiezii (Mirb.) Franco] with an Iglarid-Jones Trailer Alp can produce 1360 to 1460 cubic feet (38 to 41 cubic metres; 8160 to 8750 bd. ft.,) per eight hour day on slopes of 10...

Resource Type:

Capstone Project
Production rates and skidding cost of the FMC model 210 CA high-speed skidder

Creator:

Ohmstede, Robert H.

Abstract:

In recent years, inflation and a growing concern for soil compaction and environmental damage have affected both the forest manager and the logger. Balloons, helicopters, and skylines have been used to harvest timber and the results have been promising (Dykstra, 1975, 1976). However, the high cost of using these aerial...

Resource Type:

Capstone Project
A log truck loading study in the intermountain region: production and costs

Creator:

Schneider, Ernest William

Abstract:

In order to appraise timber, it is necessary to estimate logging costs with reasonable accuracy. The purpose of this study is to provide a rethod for estimating log loading costs in the Intermountain Region. Nine different log loaders were studied loading from cold decks on six USDA. Forest Service timber...

Resource Type:

Capstone Project

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Academic Affiliation

Forest Engineering17
School of Forestry7
Forest Management1

Advisor

O'leary, John E.5
Dykstra, Dennis P.3
O'leary, John2
Peters, Penn A.2
Aulerich, D. E.1
more Advisors »

Commencement Year

Commencement Year range begin – Commencement Year range end

Current results range from 1970 to 1988

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Committee Member

Aulerich, Ed3
Dykstra, Dennis2
Froehlich, Hank2
Dykstra, D. P.1
Froelich, Hank1
more Committee Members »

Creator

Curtis, Richard James2
Spring, Richard Keith2
Bradshaw, George Richard1
Carkin, Richard E.1
Clark, Cedric J.1
more Creators »

Date

Date range begin – Date range end

Current results range from 1970 to 1979

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Decade

1970-1979[remove]27

Degree Field

Forest Engineering17
Forestry9
Forest Management1

Degree Level

Master's27

Degree Name

Master of Forestry (M.F.)[remove]27

Language

English [eng]27

Peer Reviewed

No27

Resource Type

Capstone Project26
Masters Thesis1

Rights Statement

Copyright Not Evaluated18
In Copyright9

Subject

Force and energy3
Balloon logging -- Mathematical models2
Logging -- Production control2
Logging, Aerial -- Mathematical models2
Logging, Skyline -- Case studies2
more Subjects »

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