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Joined Apr 2012
1,577 Posts
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Hi, Overvik.
At the speeds that a P2K flies the round leading edges are a good thing. To be brief; a round leading edge gives more gentle stall characteristics and greater low speed lift. The sharp leading edge of the F-104 was a big reason why a lot of young men died.
I started flying gliders more than 40 years ago, sport/scale/aerobatic glow planes 35 years ago, and gave them up when I moved away from my old flying field and I had neither the place nor the will to set up a high start. Then I started reading about the modern motors and batteries and found a great place to fly just a few blocks from my home. I started with a small Extra 330 but soon got bored with aerobatics and got a 2 meter foam ASW28. Now? I have gone on to a Specter 1800 that will climb, vertically, to over 200meters in 10-12 seconds! Over the winter I plan on building a glider in the 2.5 to 3 meter class that will match that vertical performance. If one really wants to spend the maximum time soaring? A fast, vertical, climb is your best friend. It's better than a high start and can compete with a winch and a short burst uses less battery power than a long climb. That being said... The P2K's power train is more than sufficient for someone who just wants to get into a modern electric sailplane. If the power train doesn't satisfy you? Then you can start upgrading. My first modern electric glider was decidedly underpowered but still bags of fun. Now I have a more powerful motor in it and some other mods and it's more fun! It took some work but now it does beautiful slow rolls. |
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Joined Sep 2012
4 Posts
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Thanks, your reply makes sence to me!
I guess I have been away for a long time, and I am not used to "think electric" Maybe there is a good thing getting to altitude in just a few seconds, even though I donīt feel the need for vertical performance.Leading edges seems OK, and me comparing with a F-104 is way off maybe. ![]() I would still try to eliminate more of the drag from the trailing edges, maybe smooth them a little bit to get an even better glide ratio. If the EPO can handle getting down to a thickness of letīs say 2 mm without getting very weak? If i buy one I want this bird to sail as good as possible in light to moderate winds, meaning using the lighter battery packs and so on. I will definitely install the flaps, too. Thanks again
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Well teh F-104 was dangerous because its extremely high wing loading and short wingspan..
it was optimized for supersonic flight but down at aproaach /landings it was quite hairy and wasnt any forgiving for errors or failures (engine failing during take off meant no chance of turn back without stalling) |
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