In Radio Modeller Mar 1984, a diagram was published of an r/c operated dethermalizer to fit to to a fully flying stab replacing the usual horn. You fly normally, but if full up trim is selected, then full up stick applied, the stab went to 30-40 degrees up, causing a deep stall. The airplane then descended almost vertically, but horizontal, and fell more or less gently. Normal control could be recovered by reverting the stab to normal. I can not figure out how to make the linkages because the outlines are confusing. Has anyone made one? It could be done by using 2 servos, but this neat as it only used the one servo. I can email a pic if anyone can help. I want to try it as I want to fly in a clearing in the midst of trees, and this would be the way to "land"!
Thanks,
Adrian