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• 10:26, 4 February 2026 Dnevil talk contribs created page Spring Tester (Created page with "Category:Construction Modeltec dec 1985 Here’s a versatile Spring Tester by Jack Edwards Modeltec, December 1985 photo by author When I needed to know what weight some springs would carry and what deflection there would be, I made a cylinder of 1-1/4 inch OD brass tube having a bore of 1-1/2 inch diameter which equals 0.994 square inches, near enough to 1 square inch. A plunger acting on a fluid in the cylinder will register a direct reading in pounds loa...")