Avanti II. Control line stunt model.
Quote: "This thoroughly engineered contest design is capable of competing at the highest levels. Avanti II, by Bob Baron.
When you stop and think about it, the ideal control-line stunter must be a mechanical marvel. Besides leaping over tall buildings with ease, it should fly slowly for piloting accuracy, maintain good line tension over as wide range of weather conditions, have high stability far smoothness, yet turn quickly for good corners. It must be aesthetically pleasing to a wide cross section of peolpe and still obey the laws of aerodynamics. It must be light enough to routinely pull ten Gs negatively and positively thousands of times without fatiguing or changing its flying qualities over a useful competitive life of 500 flights. It should he mechanically sound and predictable in its handling qqualities.
Getting down to the 'nitty gritty' of precision fllying, it should have a good measure of reserve for correcting late pull-outs and take correction for finessing corners. Low physical effort is important to minimize fatigue when practicing hard. Landing and take-offs should he predictable aver a wide range of surfaces, wind directions and velocities. Turning rates in both directions should feel the same. Given all these criteria, many of which are in contradiction with one another, it is small wonder that looking for the ideal stunter resembles the search for the Holy Grail.
If you've gotten this far you are no doubt expecting to hear that I have found it. If I did, then I forgot where I put it. Those witnessing the 1980 Nats saw the Avanti II finish a fraction of a percentage point behind the 1980 FAI team. Unfortunately my pit crew was unable to clip the leadouts of the finalists and I ended up fourth. Lucky for me, Ted Fancher continued to use use Quik-Links on his ship and Murphy's law took it from there.
The Avainti II is the result of a concerted effort to keep the smooth and predictable flight qualities of the original Avanti and correct several shortcomings. First the turning ability needed to be improved, as the original was capable of flying only an average corner relative to the competition. Secondly, as with most ships, the original Avanti turned more quickly on the outside loops than the inside loops. The last improvement sought was a greater mechanical advantage in the control system to both decrease physical effort at the handle and insure adequate power to move the controls in low tension maneuvers such as the overhead eight and the top two corners of the hour-glass... "
Quote: "Steve I have resized and enlarged a 1981 FM plan of the Bob Baron Avanti II plan I photocopied in 1981. The Avanti II is a 60 inch wingspan aircraft. The plan calls for a .40 rear ported engine. Some suggest .46 - .60 engine. "
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