2005 Annual Report

Grassland Section

Dickinson Research Extension Center
1089 State Avenue
Dickinson, ND 58601

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a portable wind screen: its fabrication and use

Llewellyn L. Manske, John A. Urban, and Jeffrey J. Kubik

North Dakota State University
Dickinson Research Extension Center

The Wind Jammer is a portable protective screen designed to reduce the impact from wind during rangeland data collection.

Rangeland research projects usually sample data during scheduled successional measurement periods (e.g. herbage biomass production collected biweekly). The measurement periods, of necessity, are inflexible to the presence of wind, which is an inherent condition on rangeland. Consequently, the technical crew performing routine data collection is usually working under the hardship of being fully exposed to the elements, which can cause increased levels of physical exertion. This wind fatigue can be prevented by screening crew members and their immediate work station with the Wind Jammer.

The Wind Jammer (figure 1) has a simple design and is easy to fabricate. Two one-yard square aluminum frames are held together at a flexible joint by a piano hinge (figure 2). Hemmed canvas covers are lashed to each frame by a nylon rope threaded through grommets in the canvas cover and matching drilled holes in the frame (figure 2). Bellows-style sample bag pockets are sewn onto the inside of the canvas cover (figures 3 and 4). Three soil pins, used to stake the Wind Jammer to the ground, move up and down through holes in two mounted guides and the bottom angle of the frame. The guides are made of aluminum angle sections and have cut notches that securely latch the soil pin handle in the up or down position (figures 5 and 6).

When the Wind Jammer is being transported between sample collection sites, the soil pins are latched in the up position and the two frame halves are folded together. When the Wind Jammer is in use (figure 1), the two frame halves are opened into a V shape with the center pointing into the wind (figure 2). The work station on the leeward side (figure 3) is protected from the wind. The sample bag pockets (figure 4) allow convenient access to sample bags and prevent collected samples from being blown across the prairie. The three soil pins are pushed into the ground to provide stability and to prevent movement of the Wind Jammer in windy conditions (figures 5 and 6).


The authors are grateful to Miller Machine and Welding for fabrication of the aluminum and steel components and to Mr. Sunshine Upholstery for fabrication of the canvas components. The authors are grateful to Sheri Schneider for assistance in production of this manuscript and to Amy M. Kraus for assistance in preparation of this manuscript.

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