Mark1234, I am quite sure the normal tailplane loading is upwards because the CG isnormally behind the wing centre of pressure (quater chord point) but ahead of the static stability point. I remember it well from my ancient days in Aero Flight RAE.We did some trials on a Lancaster with a tailload restrictor that literally locked the elevators if the load exceeded a particular value. Result was that if you set the load limit below the value you might expectin a steady pullout or turn, you ended up with a situation from which you could not recover-if you pushed the stick forward you couldn't move it because transiently you would increase the upload transiently. Bet your life I once set the load limit too low, but fortuantely even in my reckles days I had included a simple switch that could disengage the whole wretched system.
