A steel helical spring carries a compressive static load of 50 lb at a deflection of 0.25 in. Maximum stress is 75,000 psi. End turns Q equal 1.5 turns. Find the value of c for the spring of minimum volume of material. Calculate the value of d and choose the nearest standard wire diameter for the actual spring. Calculate the corresponding R and the number of active coils Nc. Also find the volume of material in the spring.
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