Five T6s in a Turn

The series of air races is 6 to 7 laps per heat.  The race courses, depending on class are anywhere between 3 and 8 miles per lap.  That is more than enough time for the racers to sort them selves for finishes.  Much like the more popular NASCAR races, the start of the air race is closely monitored.  Every race has a 'starter' that is in a faster aircraft that is in the air at the same time of the race whose responsibility at the start is to make sure everyone is in the right place.  The radio chatter is fun to listen to, as you can hear the starter talk to each air craft and tell them to move up, back or stay in a lane.  Depending on the type of aircraft and race, the staging area is in different locations relative to the viewing grand stands.  
The two areas of staging are southeast of the stands, and to the west.
For races starting behind the stands, you can hear them coming and you see the aircraft starting the race.  For the races starting to the west, the aircraft start by crossing in front of the grand stands.  This start is usually for the races on the shorter courses.  Another reason I like the T6 races.
Like NASCAR, there are rules to the start.  There has to be some control over a number of vehicle that weigh several hundred pounds, going faster than NASCAR vehicles to get a good race start without incident.
The first two laps provide the best opportunity to catch multiple aircraft on a single frame.  As the race goes on, the aircraft space themselves.  On occasion, two or more aircraft will battle for a position, or lap a slower racer and the crowd goes nuts.
The T6 class starts their races to the west meaning that all the racers start by passing in front of the grand stands.  Bingo!
After the first day excitement of the races, I started looking for multiple aircraft in a single frame.  The more, the better.

ISO 800, f/6.3, 1/8000 sec, 225 mm

The speed of the shot is probably overkill, but by this time I'd settled on ISO 800 for the day.  Next time sunny days will be ISO 400 and I can probably keep enough speed.  Rookie stuff.  I tried to keep at f/6.3 to f/8 as that is close to the best image for the lens.