(41C) 'Logging Pac' manual

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An extract from Logging Planning with the Hewlett-Packard 41C Series Calculator, Oregon State University, College of Forestry, Forest Research Laboratory, June 1986

"CONTENTS
…
Skyline Planning Series (Bodenhausen) . . . . . . . . . . . . . . 5
_ Profile Reduction (PR). . . . . . . . . . . . . . . . . . . . . . . . 5
_ Profile Plot and Reverse Profile (PLOT1) . . . . . . . . . . . . 12
_ Skyline Payload Analysis for Live and
- Running Skylines (LOAD) . . . . . . . . . . . . . . . . . . . . . . 16
_ Standing Skyline Payload Analysis (SSL). . . . . . . . . . . . 28
_ Clamped Carriage Payload Analysis (CLCAR). . . . . . . . . . 34
Skyline Profiles and Traverse Closure (STC) . . . . . . . . . . . 39
Yarding Cost Estimation Program (YDCOST) . . . . . . . . . . . 59
Guyline Analysis and Column Failure Analysis (TALHOLD) . . . 78
Field Skyline Analysis Program (FSAP) ............... 93
RubberTired Skidder Mobility Simulation Model (MOBILTY) . . 105
Average Skid Distance: Coordinate Input and Variable
Density (ASD). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115
Log Weights (LOGWT) . . . . . . . . . . . . . . . . . . . . . . . . . 125
Critical Tensions for Uphill Jack Passage (JACK). . . . . . . . . 133
Economic Analysis (PNVP). . . . . . . . . . . . . . . . . . . . . . . 139
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INTRODUCTION
BACKGROUND
For a number of years, logging professionals have been developing programs for various hand-held calculators. These programs save many hours of tedious hand computations. The bulk of the work has been done by employes of the Forest Service, U.S.D.A., and students and faculty members of Oregon State University; thus, the programs are in the public domain.
Several types of calculators, for which various programs exist, have evolved over time. One in common use is the Hewlett-Packard 41 series calculator with various attachments and memory capabilities. (Mention of trade names does not constitute an endorsement but is only provided for reader identification.) Many programs have been written for the early HP-67/97 series calculators. While the HP-67/97 calculator programs can be readily used on the HP-41 series calculators, the programs themselves do not take full advantage of the capabilities and technology of later calculators. For this reason, there was a need to update many of the earlier calculator programs to current levels of technology.
…
PURPOSE
The purpose of this publication is to collect, in one place, the reference material for a Users Guide for 14 of the commonly used programs for logging planning. Examples allow users already familiar with planning programs to use the programs more effectively …"

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