Lesson 3/Learning Event 1
One example of an integral frame is the hull of a combat tank. A tank hull is an assembly
of heavy armorplate. It serves not only as a frame but also houses and protects the crew
CONSTRUCTION OF SPRINGS AND SHACKLES
FIGURE 24. ELLIPTIC LEAF SPRING.
The key parts of the suspension system are the springs. One of the first types of springs
to be used in suspension systems was the elliptic leaf spring. It is referred to as an elliptic
spring because it has an oval shape, like a football or an egg.
FIGURE 25. ELLIPTIC LAMINATED LEAF.
The spring is made stronger by adding more leaves. The spring then becomes known as
an elliptic laminated leaf spring.