I feel Biplane Barmy is simple, elegant system and rule is on the whole clear.
But there is some questions.
1)Alt +1 Maneuver at Altitude 6
Can the "Climb" or "Immelman" be selected at Altitude 6?
I can't find Infantry Rule( at 2.9 "Anti-Aircraft Fire").
_6.4 Determine Units
_If one side has less planes than the other they
_may take One additional plane OR Four AA
_weapons (Flak Guns, Machine Guns or Infantry)
[4 of 5 Stars!]