用过后的打火机气瓶随手可取,不花成本,是做反冲实验的理想材料,下面略举三例:1.双喷气飞机材料:空打火机气瓶两个,细铁管一根,约25cm 长,可取旧羽毛球拍或旧雨伞柄,圆形木座(直径25cm),自行车废钢条5根,针筒、药棉、酒精、细铁丝、薄铁皮等. The used lighter gas cylinders are readily available at no cost and are ideal materials for recoil experiments. The following are three examples: 1. Two jet aircraft materials: Two empty lighter cylinders, one fine iron tube, about 25cm Long, desirable old badminton racket or old umbrella handle, round wooden seat (diameter 25cm), bicycle scrap 5, syringe, cotton, alcohol, thin wire, thin iron sheet and so on.