树冠维护解释
The canopy on the fighter aircraft Gripen protects the pilot during flight and is made of polyurethane, 一种塑料. The plastic suffers wear and tear and becomes scratched over time, 哪一个, considering the pressure changes the canopy is subjected to, 会导致严重的损坏和大的裂缝吗. In turn, this would jeopardise the safety of the pilot in the air.
Erik Widerstedt is a maintenance technician at Saab and his work involves grinding and polishing Gripen canopies:
“我的工作就是确保这种情况不会发生.”
When a Gripen canopy arrives at the Saab maintenance workshop where Erik works, the first step is to evaluate the damage and determine whether the canopy can be restored by abrasive polishing or whether it needs to be replaced. The time it takes to restore a canopy depends on the extent of the damage. Major damage, often caused during aerial refuelling, can take Erik up to 150 hours to polish smooth.
"It may feel like nothing is happening when the damage still looks the same after 80 hours of grinding."
“在这个工作, 你得注意细节, 最重要的是, 耐心, 因为工作是一个缓慢的过程. It may feel like nothing is happening when the damage still looks the same after 80 hours of grinding. It takes time because I have to polish smooth such a small amount of material each time.”
The final step is to inspect the damage using a magnifying glass. 如果划痕完全消失, the canopy can be refitted to the aircraft and the pilot can continue to work safely.