RE: lifting tail
<div style="margin: 0in 0in 0pt"><span style="font-size: medium">I will attempt to explain my original post to make more sense it’s becoming obvious many don’t understand what I was saying. The issues came to mind while reading someone’s post, which was about having elevator trim change at different speeds. The idea is simple. Take a trainer plane of any kind that has exhibits these characteristics regardless of it’s horizontals angle of incidence main wing style all that is irrelevant at this point.</span></div><div style="margin: 0in 0in 0pt"><span style="font-size: medium"></span></div><div style="margin: 0in 0in 0pt"><span style="font-size: medium">Now give the horizontal stab a small lifting airfoil. Small enough to be almost insignificant at slow speed (as I mentioned it would need to be calculated). </span></div><div style="margin: 0in 0in 0pt"><span style="font-size: medium"></span></div><div style="margin: 0in 0in 0pt"><span style="font-size: medium">Now as the aircraft speeds up it starts to gain altitude, the faster the plane goes the quicker it gains altitude. This is whatwill happen. The tail will start to produce lift the faster the plane goes the more lift the tail produces calculated to be proportional to the altitude gain. The lift produced by the tail will pitch the nose down keeping the plane from gaining altitude.</span></div><div style="margin: 0in 0in 0pt"><span style="font-size: medium"></span></div><div style="margin: 0in 0in 0pt"><span style="font-size: medium">It no different than you forcing the tail up (lifting) with your elevator to keep the plane level. It just lifts automatically due to the airfoil rather than elevator input.</span></div><div style="margin: 0in 0in 0pt"><span style="font-size: medium"></span></div><span style="font-size: medium">Now tell me why that will not work with facts. Not by just saying or quoting internet to say the tail supposed to push down. Of course it is in some cases and in those cases, now the airfoil will allow it to push down less keeping the airplane level.</span>