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(一)材料:泡沫塑料板(厚50mm)、薄木条、铅丝、木块、废圆珠笔尖、大头针等.(二)制法:用厚20mm边长为120mm方木块和长约230mm的8号铅丝制一支架,距支架的顶端10mm处水平地固定一枚大头针.在薄木条的右端5mm处固定一用16号铅丝制成的支架.(图1—(α)所示)并在距右端120mm处的木条中部/嵌入去掉钢珠的圆珠笔尖(图1—(b)示).把塑料板制成如图2所示的机翼状,将机翼架在木条右端的铅丝支架上.把制成的机翼组合件通过笔尖与大头针的活动配合安装在带座的支架上,这样就制成了一个演示器,如图3所示.此时如不平衡可在木条的另一端加上配重物.
(1) Materials: Foam plastic sheets (thickness: 50mm), thin wood strips, lead wires, wooden blocks, waste ballpoint pen tips, pins, etc. (2) Method of manufacture: Use a piece of wood with a thickness of 20mm and a length of 120mm and a length of about 230mm. A bracket made of lead wire is fixed horizontally with a pin 10mm from the top of the bracket. A bracket made of lead wire No. 16 is fixed at the right end of the thin strip 5mm (shown in Fig. 1-(α)) 120mm at the right end of the middle of the wood / embedded in the ballpoint pen to remove the ball (Figure 1-(b) shows). The plastic plate is made into a wing as shown in Figure 2, the wing frame on the right end of the wire rod on the wire support The assembled wing assembly is mounted on the bracket with the movement of the pen tip and the pin, so that a demonstrator is made, as shown in Fig. 3. At this time, if the imbalance is in the other One end with a weight.