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Post by chamm37 on May 21, 2008 23:17:54 GMT 10
yer sounds abit complicated for me but yer we will see this weekend hopefully and find out what we need to do to get it right ae mate....... are you going to be up at Mt Mee helping to clear out the slope
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Post by thevon on May 22, 2008 7:19:39 GMT 10
Hey look from my limited experience, I agree absolutely 100% with what Karl said there. The fine tuning is just so critically important. You can have 2 exact same planes, one flies like a pig and the other sizzles, just due to CG and throw issues.
Karl gave me help with my Bat build a year ago, and we've had long chats about build methods. He's a great guy. Ian is one of the most technically informed guys in the US. They're at the top of the ladder with this stuff.
And for planks I completely agree with his comments too! If anyone says they got a Moth, Reaper, Bluto and had no problems setting it up and it flies beautifully ... you can be sure that guy is a real master! For the average klutz like me they're a headache.
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Post by Vanders on May 22, 2008 7:57:28 GMT 10
Yes I agree as well, I'm just not a patient guy so I usually just rush into things. I'm going to sit down on Saturday & based on Karls post set mine up as best I can & hopefully get to throw it around on Sunday.
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Post by Pij on May 22, 2008 8:14:31 GMT 10
I thought you were going to say...
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Post by felix on May 22, 2008 19:07:59 GMT 10
i'm definately with andrew here (thevon).....maybe not so much in tight spots like SC on the average day but when the wind picks up or somewhere like pedwell road (holy grail lift ;D) the setup is everything! i remember watching marks bee at pedwell rd (he's a local master!) absolutely carving up whilst my much lighter/slipperier bee staggered around like my good myself on a friday night lol.both andrew,mark and i all commented on how the thing moved.even at SC his bee is hard not to notice. one thing i have been focussed on lately is studying setups (absolute headache with a few failures) and my wing just feels better and better each time......just wish i could get some half decent lift to finally sort my new wing out lol
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Post by thevon on May 22, 2008 19:32:48 GMT 10
One time Steve (Ding) was chatting about aileron differential and adverse yaw. On normal sailplanes, you have the up throw bigger than the down throw (aileron diff), because the down throw causes a lot more drag, so if you have equal throws the wing with the down throw gets pulled back more by the drag, making the plane yaw in exactly the direction you don't want to go! (adverse yaw). So in my wisdom I thought hey, I'll improve my Duck and do that! Cut it back to about 13 up and 8 down, I think. Didn't fly for a while, then next time I flew, I'd turn at the end of SC and it would spin and fall out of the sky! Flew like a total dog! Got impaled on so many cactus spikes and fence rails! Everyone was commenting on it and offering advice. I put the CG forward etc, and it took me about a week to remember that I'd dialled in aileron diff. Soon as I changed it back, it flew perfectly again! (except for the tape and snapped spars from all the crashes) I wrote it up on RC Groups and that's how I got in contact with Zipper and bought the Drongo from him!: www.rcgroups.com/forums/showthread.php?t=649088
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Post by felix on May 22, 2008 20:01:51 GMT 10
haha,andrew i did the same thing with mechanical differential with the exact same results! good learning about pitching moments in the end. goes to show how greater differences a tail makes!
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Post by chamm37 on May 22, 2008 21:50:08 GMT 10
so felix is sat still on!!!!!!!!!! ;D
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Post by felix on May 22, 2008 21:56:06 GMT 10
yeah bud saturday is looking like a go ahead.i will be in morayfield saturday morning,have your number and will call friday night.all goes well should pick you up round 12ish if the wind is right.
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Post by chamm37 on May 22, 2008 22:16:47 GMT 10
yer do u want to go and fly at SC.......
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Post by felix on May 22, 2008 22:43:54 GMT 10
no i would say mt mee or maleny will be where i'm off too.
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Post by chamm37 on May 22, 2008 23:39:36 GMT 10
would you be able to pick us up from Redcliffe or not!!!!! Its just that i am going to my grandparents place still and yer.....i mean i can say to them i cna come over later on in the afternoon but yer.....wat ya say ae mate
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Post by chamm37 on May 22, 2008 23:47:29 GMT 10
would you be able to pick us up from Redcliffe???
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Post by felix on May 23, 2008 7:29:27 GMT 10
chamm i wont be able to pick you up from redcliffe sorry but don't worry there'll be plenty of other chances.good thing for you is at redcliffe you'll be nice and close to both woody point and shorncliffe.
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Post by ding on May 23, 2008 7:48:06 GMT 10
One time Steve (Ding) was chatting about aileron differential and adverse yaw. On normal sailplanes, you have the up throw bigger than the down throw (aileron diff), because the down throw causes a lot more drag, so if you have equal throws the wing with the down throw gets pulled back more by the drag, making the plane yaw in exactly the direction you don't want to go! (adverse yaw). So in my wisdom I thought hey, I'll improve my Duck and do that! Cut it back to about 13 up and 8 down, I think. Didn't fly for a while, then next time I flew, I'd turn at the end of SC and it would spin and fall out of the sky! Flew like a total dog! Got impaled on so many cactus spikes and fence rails! Everyone was commenting on it and offering advice. I put the CG forward etc, and it took me about a week to remember that I'd dialled in aileron diff. Soon as I changed it back, it flew perfectly again! (except for the tape and snapped spars from all the crashes) I wrote it up on RC Groups and that's how I got in contact with Zipper and bought the Drongo from him!: www.rcgroups.com/forums/showthread.php?t=649088LOL Sorry. Too much of a good thing. In full size sailplanes they use rudder constantly to correct yaw. You'd think the most critical instrument in a sailplane is the ASI or the altimeter. It's actually the piece of wool stuck to the front of the windscreen with clear sticky-tape. You can see the "yaw string" in action in this video. It's a fun one too. www.youtube.com/watch?v=F3Q2iG8sDjY&feature=relatedWhen you're in the plane you're also quite a bit more patient about roll rates. Full size sailplanes roll very very slowly compared to models. I think these far higher roll rates cause problems. Also full size's are a conventional plane which is massively different to a wing. Andrew, we need to talk. You're flying would benefit from a ride in the real thing. Maybe it's time for a road trip.
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