Bi-fin 3 axis control

The M13 model was designed to solve for, and isolate the problem of control and stability, while flying a bi-fin configuration. Reference M9 which is a tri-fin with a long spanned main foil. M13 propulsion uses a brushless motor and 3 cell 4200 battery which provided test sessions of 20 minutes. so far the biggest lesson so far as of 10_15_16, is that this configuration is harder to maintain level flight in the pitch and roll axis when compared to M9. I spent quality time to trim this foiling (LeLe / Flying) machine. In reality, the trim procedure is the same as an aircraft. First, one must hunt for the optimal Center of Gravity (CG). Second Dial in the end points for all surfaces. on 11_06_16 finished task. My conclusion here is simple; A slow-flight-Bi-foiler with a fixed payload (sailor) results in a high CG. For the proposed demonstration class of a 16 foot sailboat, the ratio of “sailor-to-structure” mass will be about 2:1.