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How to get maximum height on a winch launch?
Derek Copeland wrote: The exact position to hold the stick during a winch launch is very type dependent. Gliders with way back c of g hooks, such as the K21, K8 and Pirat will require the stick to be held neutral or even forward of neutral during the full climb. My Pirat will fly a very nice winch launch which is almost completely independent of anything the pilot chooses to do with the stick! It's not so much the fore-and-aft position of the hook, I think, as the vertical one: since it is at the bottom of a deep fuselage there is a considerable nose up pitching moment during the ground run. As soon as it takes off, therefore, it does a lovely rotation into full climb all by itself: full forward stick has no effect at all. Gliders with single 'compromise' hooks such as the Slingsby Skylark and the Bocian will need the stick to be held on the back stop if they are to climb at all steeply. All the Bocians I have ever flown had C of G and nose hooks. The Pirat manual specifically permits winching on the nose hook: using full back stick and forward trim from the "All Out", and warning that it will only give 60% of normal release height. I have never tried this, for several reasons, one being that I rather like having the back release there ... Ian |
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