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Borislav Deianov wrote in message ...
Rich Stowell wrote: Borislav Deianov wrote in message ... I have the same problem as Dave, except I'm flying a Citabria 7KCAB (fixed pitch, 150hp). And it's only a problem when I fly solo. I can do a reasonable snap roll with an instructor in the back. [snip] In your Citabria, establish level slow flight at 80 mph. Leave the power as is for now (later you can try adding a bit more power, but for now, work on the rudder/elevator timing). Lead the snap roll with brisk rudder application followed by sufficient aft elevator to stall (about a 2 G or so tug on the stick). As soon as the airplane departs, release a touch of the aft elevator, etc. I tried this during my last session and I'm happy to report that it worked very well! I was able to reliably snap it in both directions. The roll rate was decent and accelerated a bit after releasing some elevator input. Wow. I needed 1800 RPM to fly level at 80 mph. The problem now is that the recovery after one turn leaves me in a marked nose-down attitude. After a quick pull up to level flight, I end up at about the same airspeed but 200' or so lower than the starting altitude. Is there a way around that? More power and an starting the maneuver more nose up, perhaps? Thanks for you help! Boris Glad to read things are coming along, Boris! Now for your next practice exercises: Exercise 1 -- Establish level slow flight at 80 mph and 1800 rpm. Increase power to 2000 rpm and initiate a shallow, stablized climb at 80 mph. Perform snap rolls exactly as described earlier, using the rudder-elevator sequencing. Practice the same from a climb at 80 mph and 2200 rpm; then again climbing at 80 mph and 2400 rpm. Exercise 2 -- Establish level slow flight at 70 mph (probably still close to 1800 rpm). Leaving the power alone, lower the nose *a little* and allow the airplane to accelerate. Perform the snap roll as the needle hits 80 mph. Practice the same from 70 mph and 2000 rpm, 70 and 2200 rpm, 70 and 2400 rpm. In each case, lower the nose toward the horizon and snap at 80 mph. The idea is to sneak up on 80 mph from 70 mph, so don't stuff the nose down when trying to accelerate form 70 to 80. Lower the nose "just enough" to accelerate to 80. These exercises are designed to steadily and incrementally increase the rate of snap while still working on the timing of rudder and elevator actions, all the while not exceeding 80 mph. Also during the recovery, try not to move the elevator forward at all -- just full opposite rudder and perhaps full opposite aileron if needed to prevent over-rotating. You've released a little of the aft elevator once the snap begins, and this may be all the forward you'll need from that point on. Report back... Rich http://www.richstowell.com |
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