I’m an active current commercial pilot flying in the back country, and I hate to paint a bad picture. But mid-air collisions in small planes happen more than once a year (as stated in Boing write up). This year alone I’ve probably read half a dozen reports on mid-airs.
I used to fly tight formation flying and aerobatics in loose formation. Too many close calls made me leave that “hobby” behind. The risk/reward quotient was way out of whack. Considering the aircraft involved (virtually the same types) it seems likely they were doing a bit of close work. Such a shame.
