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#1
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![]() Dan G wrote: Should say that it's "full power all the way up" the main climb, of course we back off at the top. But there was some suprise at the launch point recently when a K21 waved off... the common thought was "K21s should be able to handle it". Maybe it could if it was no wind, but with a good headwind they just can't. And that was a surprise? Find yourself another club, man, because if headwinds on a winch launch are unexpected your current lot are going to damage someone one day. So far the sole answer to my original question has been "look at the wingtips during the launch and find what stick position will hold them at about 45 degrees to the horizon AND give a safe speed. If you have a low powered winch you may have to adopt a lesser angle" from Derek. Does everyone agree with this? No. I think it's bad advice. Yes, you should aim to have a proper climb angle and air speed, but the stick position is irrelevant. Just use enough to do what's needed. How many inches of rudder movement would you use to balance a 20 degree per second roll into a turn? Or would you just aim to us enough to keep the string straight? Ian |
#2
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Ian wrote:
Dan G wrote: Should say that it's "full power all the way up" the main climb, of course we back off at the top. But there was some suprise at the launch point recently when a K21 waved off... the common thought was "K21s should be able to handle it". Maybe it could if it was no wind, but with a good headwind they just can't. And that was a surprise? Find yourself another club, man, because if headwinds on a winch launch are unexpected your current lot are going to damage someone one day. Easy now, my club has a long safety record any would be proud of. AFAIK there's never been a winch launch accident. In that particular example there was a very strong wind gradient. I was using as an illustration of the belief that K21s can take everything the winch gives. So far the sole answer to my original question has been "look at the wingtips during the launch and find what stick position will hold them at about 45 degrees to the horizon AND give a safe speed. If you have a low powered winch you may have to adopt a lesser angle" from Derek. Does everyone agree with this? No. I think it's bad advice. Yes, you should aim to have a proper climb angle and air speed, but the stick position is irrelevant. Just use enough to do what's needed. Well, "find what stick position will hold them at about 45 degrees to the horizon AND give a safe speed" and "you should aim to have a proper climb angle and air speed" seems to be the same thing... Dan |
#3
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![]() Dan G wrote: Ian wrote: And that was a surprise? Find yourself another club, man, because if headwinds on a winch launch are unexpected your current lot are going to damage someone one day. Easy now, my club has a long safety record any would be proud of. AFAIK there's never been a winch launch accident. In that particular example there was a very strong wind gradient. I was using as an illustration of the belief that K21s can take everything the winch gives. I am glad to hear about the safety record. I only hope they can keep it. No. I think it's bad advice. Yes, you should aim to have a proper climb angle and air speed, but the stick position is irrelevant. Just use enough to do what's needed. Well, "find what stick position will hold them at about 45 degrees to the horizon AND give a safe speed" and "you should aim to have a proper climb angle and air speed" seems to be the same thing... No, they are completely different. Stick position is irrelevant. All that matters is whether you need to move it. Let me give a simple example. The exact position of the temperature lever on a shower doesn't matter, does it? If it's too hot you move it "cold" a bit and if it's too cold you move it "hot" a bit. You don't say "I'll have a position 5 shower, no matter how hot that is". Same with the stick. Ian |
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