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General control line discussion => Open Forum => Topic started by: Scott Richlen on June 10, 2018, 02:26:30 PM
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What is the weight of your Cardinal profile wing-tip weight?
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If I had a Cardinal, it would be adjustable, and adjusted to whatever that particular plane needed with the particular lines I was flying it with.
Start with about 1 ounce -- that should be way too much, which is a good start. Then adjust as needed until Stunt Nirvana is reached.
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If I had a Cardinal, it would be adjustable, and adjusted to whatever that particular plane needed with the particular lines I was flying it with.
Start with about 1 ounce -- that should be way too much, which is a good start. Then adjust as needed until Stunt Nirvana is reached.
That will not be way too much. The airplane has equal-span wings (or at least, that's what it's supposed to have, unless someone changed it). 2 to start, and that's low if if wasn't for the engine and tank out there, it might need more.
Brett
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Jared Hayes has one he has struggled with. I don't know what the airplane called for but he didn't make it adjustable and it was WAY TOO MUCH. I suggested he start trimming away the inboard flap. It now flies pretty well...with about half the inboard flap gone. Looks strange but flies pretty well now. I'm a little suspect of the airfoil at the tips though I haven't really spent much time to look into it.
Dave
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Jared Hayes has one he has struggled with. I don't know what the airplane called for but he didn't make it adjustable and it was WAY TOO MUCH. I suggested he start trimming away the inboard flap. It now flies pretty well...with about half the inboard flap gone. Looks strange but flies pretty well now. I'm a little suspect of the airfoil at the tips though I haven't really spent much time to look into it.
Dave
Trim 5/8" to 3/4" off the back of both flaps, set control ratio to 2:3. It will fly really, really nice once that's done.
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Jared Hayes has one he has struggled with. I don't know what the airplane called for but he didn't make it adjustable and it was WAY TOO MUCH. I suggested he start trimming away the inboard flap. It now flies pretty well...with about half the inboard flap gone. Looks strange but flies pretty well now. I'm a little suspect of the airfoil at the tips though I haven't really spent much time to look into it.
Dave
That can happen if you build in tip weight. In that case I would dig it out, rather than trim the flaps that much differently.
Brett
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Trim 5/8" to 3/4" off the back of both flaps, set control ratio to 2:3. It will fly really, really nice once that's done.
I second that motion.
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I second that motion.
Thank Ted Fancher for that one, that was invented out in the parking lot at Mission College in Santa Clara, CA, and done on-site to Paul Ferrell's Profile Cardinal. He won the Senior National Championship about two weeks later.
Brett
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Mine is adjustable however at one time I did have way to much in it. I went and grabbed mine and pulled the weight box to see what I have in it currently, its 1 oz. I had a big hinging issue with the plane before. Where when you gave down control the outside wing would roll upward and vise versa on up control. The more tip weight I added the worse it got. So I started pulling tip weight out and it got better. But still wasn't good by any means. After talking to Dave once at a contest. I decided to start to trim down the inboard flap. I have ended up taking off a full inch width of the inboard flap, and now it flies pretty well. It just gets a lot of "looks" at the flying fields haha... But hey I won 1st in North Carolina with it 2 years ago in a class of nearly 20 competitors in its current configuration, so for an ARF its good enough for me.