Skip to Main Content
U.S. Forest Service
Caring for the land and serving people

United States Department of Agriculture

Home > Search > Publication Information

 Due to a lapse in federal funding, this USDA website will not be actively updated. Once funding has been reestablished, online operations will continue.


  1. Share via EmailShare on FacebookShare on LinkedInShare on Twitter
    Dislike this pubLike this pub
    Author(s): Dale R. Waddell
    Date: 1989
    Source: Res. Note. PNW-RN-484. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 12 p
    Publication Series: Research Note (RN)
    Station: Pacific Northwest Research Station
    PDF: View PDF  (1.84 MB)

    Description

    Log weights were estimated from the product of Huber's cubic volume formula and green density. Tags showing estimated log weights were attached to logs in the field, and the weights were tallied into a single load weight as logs were assembled for aerial yarding. Accuracy of the estimated load weights was evaluated by comparing the predicted with the actual load weights as measured with scales in a helicopter. A total of 110 loads were evaluated. The load weights were accurate (about 10-percent error), and the method was easily applied under difficult logging conditions. The number of aborts caused by inaccurate estimation of load weights was small (six). Increased efficiency provided by accurate estimates of load weights was often negated during the assembly of loads and in the hooking operation. Greater yarding productivity can be achieved when an accurate log weight estimation technique is combined with efficient load assembly and hooking operations.

    Publication Notes

    • You may send email to pnw_pnwpubs@fs.fed.us to request a hard copy of this publication.
    • (Please specify exactly which publication you are requesting and your mailing address.)
    • We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
    • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.

    Citation

    Waddell, Dale R. 1989. Estimating load weights with Huber''s Cubic Volume formula: a field trial. Res. Note. PNW-RN-484. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 12 p

    Cited

    Google Scholar

    Keywords

    Aerial logging, weight estimation, logging productivity

    Related Search


    XML: View XML
Show More
Show Fewer
Jump to Top of Page
https://www.fs.usda.gov/treesearch/pubs/25094