Ferris, Richard. [from old catalog] · New York, T. Nelson and sons · leaf 356
os-sible to waste fully ^ of the material unless thework is sldlfully planned. Taking the width ofthe chosen material as a basis, we must first deductfrom f of an inch to 1^ inches, in proportion to thesize of the proposed balloon, for a broad seam andthe overlapping necessary. Dividing the… … Finsterwalders method of cutting material for a spherical balloon, by whichover one-fourth of the material, usually wasted in the common method,may be saved. It has the further advantage of saving more than half ofthe usual sewing. The balloon is considered as a spherical hexahedron(a six-surfaced…
Aeronautics
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
