Research on Lightning Attachment Points Test on Airplane Model
Hao Wen · Gao dianya jishu · 2006
The lightning is threatening to the safety of flying aircraft.To improve the lightning protection of airplane,according to the China Aviation Industry Standard HB6129《Lightning protection requirements of aircraft and Test methods》and referring to Standard of other countries,the high voltage generator is used to make the lightning attachment point test on a scale model of airplane.The voltage level of the generator is 4800 kV,the up gap between pole and the scale mode is 2.5m,the gap between ground and the scale model is 1.5~2m(different with the angle of the scale mode).The model is made of wood, its surface is spread with zinc,the ratio of scale model is chosen as 1/20.In the test,the test lightning wave form is chosen as the positive standard lightning wave form of 1.2/50μs,the test voltage is 2500~3000kV.The totally 37 discharge points are chosen as each 30~(o) angle when model rotated.In each discharge point 10 discharging is made,and the attachment points are recorded by photos.The factors that influence the laboratory test such as the model scale,gap spacing,discharging polar and relative position respect to the model have discussed in detail.Totally 370 test discharging has been analyzed,the different places' attachment points statistic percentage of aircraft has made,the result agrees with the actual lightning experience of F-4 aircraft.