Airflo

Special sink rates: Di3, Di5 and and Di7 belly sink rates, the tip of the Di3 sinks at 1.5" per second where the belly sinks at 3" per second, Di5 sinks at 3.5" per sec and the Belly sinks at 5" per sec, on the Di7 version the tip sinks at 5" per sec and the belly sinks at 7" per second