Why trainers balloon and pattern ships don't. Also a consideration of lifting tails and down lift tails. These figures are from Model Aviation which had a article about canards. I forget the exact date and author (may I be forgiven?).

This first one is a typical trainer.
The second figure is a pattern ship (well a flat bottom wing pattern ship with wing at some angle, the force diagram is the same with a symmetrical airfoil and angles at 0-0).