RE: weight VS stability
My apologies if my comment seemed harsh, but being the beginners forum, it is important that incorrect information be identified. Many people, particularly beginners, misunderstand that the CG ranges provided by the manufacturers are not between tail-heavy and nose heavy. Most manufacturers recommendations tend to have the aftermost CG recommendation very close to neutral. A tail heavy plane will be aerodynamically unstable. A neutrally balanced plane will be sensitive, but for the most part stable. As the CG moves forward, stability increases, but elevator sensitivity is reduced.
Now you will hear that 3D flyers like their planes to be slightly tail heavy. This is somewhat true, but one has to recognize the true relationship between the aerodynamic center of lift and the angle of incidence. the AC will, in fact, move backward on the wing as the angle of attack increases, causing the plane to enter a more stable aerodynamic condition as the AOA increases, which is why a certain degree of "tail heavy" can be tolerated for high alpha flight. A "tail heavy" plane will be easier to hover, but its going to take a greater degree of skill than most beginners to get it in the air and trimmed out. If the AC does not move far enough for the plane to enter the stable condition before transitioning into the hovering condition, it will try to flip around backward into the wind. A plane so balanced will be extremely sensitive, if not unstable, at higher speeds.
Brad