The Torsion of Members Having Sections Common in Aircraft Construction (1930)
NASA Technical Reports Server (NTRS) · leaf 10
TORSION OF MEMBERS HAVING SECTIONS COMMON IN AIRCRAFT CONSTRUCTION 9 leveled. Provision was made for increasing the air pressure below the soap films or decreasing it above them. With this apparatus contour lines and hence displacement volumes could be determined. Stress could also be determined,… … Figure 3.—The complete assembly of the soap-film apparatus secutive contours. A collimator for measuring slope directly was made but time and funds allotted to the study were exhausted before it was put in use. The test plates were cut from sheet aluminum approximately 0.05 inch thick. The edges…
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