For the world championship in 2016 (regardless of exact date), a junior competitor must turn 18 in 2016 (regardless of exact date) or later.
The CG can be flown from 84% to 90%. The students should start at 84%. The CG is achieved using ballast.
Down thrust of 1 deg and left thrust of 3 deg are shown are the plan, but these may not be enough. Each model must be field tested and customized. I believe 1.5 deg down and 3.5 deg left will be necessary.
On this model and on most indoor models, the zero-degree thrust line runs below the vertical center of gravity. Thus, at zero degrees, the thrust creates an upward rotating torque. This upward rotating moment is especially high at launch and causes the model to stall. One part of the solution is to decrease this upward moment by increasing the down thrust. Different fliers do it differently, and many use a motor stick that bend under high tension. In our design, we use 1 deg of down set statically and will use additional down by letting the Ms bend if necessary. In actuality, on this F1D, it takes 4.7 degrees of "down" for the thrust line to run through the vertical CG.