NASA Harpoon

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After the antenna panels are pulled together with standard cables, the holes in two opposite panels will be aligned. There are two bushings on each of the two panels. Rods are placed in one of them (their silhouette resembles a harpoon).The rods do not go beyond the contour of the panel and during the action of overload and vibration they are held in place by spring petals compressed to the base diameter.After applying voltage to the electromagnet winding, the rod “shoots” into the hole on the opposite panel. The rod moves up to the stop with its collar against the end of the bushing (35 – 36 mm). Spring petals go beyond the edge of the hole and open. In the open state, the petals rest against the spherical surface of the sleeve on the opposite panel. Due to their elasticity, the petals occupy the maximum available distance and rigidly fix the two panels.The total weight of the added parts must not exceed 800 gramsStem length tolerance 1 mmEverything is very simple. If there are questions I will try to answer.