This diagram provided by Comp Cams depicts a cross-sectional view of a No. 26918 beehive spring that's loaded to near coil bind. This Finite Element Analysis (FEA) allows designers to look for the highest stress points of the design and adjust accordingly. Blue indicates low stress areas, while red indicates stressed areas that are too high for extended life of the material. Notice that the wire is ovate. Its shape is designed to combat the stress loads the spring carries.
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