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At 20:06 29 October 2004, Nafod40 wrote:
Todd Pattist wrote: I had my doubts about using this technique in a slippery glass ship, but I found it to work fairly well, except I use trim back. I have tried this in my Ventus C, once for a total of 10,000' descent, once for 8,000' descent and once for 5,000' (a real waste of altitude, but each was after a wave flight and I was cold). I found that trim back (thermal setting), flaps at -1 (one notch negative - zero and positive flap settings are limited to 80 knots), wheel out and brakes full open worked best. The 10,000' and 5,000' descents were entered level, became a gentle stable turn and remained fairly stable with some phugoid speed oscillation. The turn would sometimes steepen, sometimes shallow or even reverse. When flying in the military, we used to play games and see what we could fail and still fly the plane IMC. I found I could get by with a turn needle, an AOA gauge, a balance ball (or a balance string) and an ASI. The turn needle coupled with the balance string could be used to maintain wings level. Basically use rudder to keep the turn needle centered, and wing to balance flight. The AOA with the airspeed, oddly enough, worked fine for pitch once you got used to it. The AOA responded instantly to pitch inputs, and let you immediately correct them. From a controls standpoint, it gave great derivative information. The airspeed then let you dampen the slow pitch deviations. It was a great integrator. One could replicate an AOA indicator by a string on the side of a cockpit. I could fly a PAR to mins using this technique. Tiring, but doable. So the turn needle is the only thing seriously lacking in a glider. Speak for yourself, I have a turn and slip AND a horizon in my panel and consider them minimum equipment for wave soaring on cloudy days in a slippery glider. |
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