Information for Inspectors of Airplane Wood Prepared At the Forest Products Lab
Information for Inspectors of Airplane Wood Prepared At the Forest Products Lab
United States Bureau of Aircraft Production Insp
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35 of one-tenth of 1 per cent. Mark the initial weights on the sections, and dry them to constant weight in the oven heated to 212 F. Re weigh them to the same accuracy and determine the per cent initial moisture content of the samples from the formula : initial weight oven dry weight. .. Per cent initial moisture content= oven dry weight (6) Preparation and placing of samples: Immediately after cutting the 24-inch samples described under (a) paint the ends of the sam- ples with a heavy coat of... asphalt paint. Then weigh them sepa- rately on the platform scale to an accuracy of one-tenth of I per cent. Mark the initial weights on the samples and place them in the piles so as to come under the most severe, least severe, and average drying conditions, and so as to be subjected to the same drying conditions as the adjacent pieces. Where the circulation of air is vertical, place samples near the tops, centers, and bottoms of the piles; and where the circulation is lateral place them near the sides where the air enters and leaves the piles and near the centers of the piles.
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