Maybe only have explosions on if the airbase is in use

that could work too

Your getting three but just use a zep

Getting there not three

I think you could do it but only if the airbase can be destroyed while the craft is piloted, destroyed by movecraft only

also said airbase craft should be destroyable and on the surface. after it is destroyed no grounded planes can take off anymore and a timer begins for planes already in the air. when the timer reaches 0 all allied planes are unable to move