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Speed,Combat,Scale,Racing => Scale Models => Topic started by: Walter Hicks on July 26, 2013, 11:29:17 PM
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Mr Mulligan ,Electric, Converting for Scale C/L . Question is how strong does the Lead Out guide have to be? See pictures. Do I need to brace it with
the wing struts? I Am going to add a piece at the bottom of leadout guide wire attachments <a href="http://s82.photobucket.com/user/kickercoach12/media/IMG_0340.jpg.html" target="_blank"><img src="http://i82.photobucket.com/albums/j262/kickercoach12/IMG_0340.jpg" border="0" alt=" photo IMG_0340.jpg"/>[/url]<a href="http://s82.photobucket.com/user/kickercoach12/media/IMG_0339.jpg.html" target="_blank"><img src="http://i82.photobucket.com/albums/j262/kickercoach12/IMG_0339.jpg" border="0" alt=" photo IMG_0339.jpg"/>[/url]
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I can't give you numerical answer, but I will say.
It might carry a lot more stress than you think.
If it fails the whole deal is over.
Don't underbuild it.
I've built several biplanes, pretty much the same deal, except you have to wings to brace against.
I recommend starting low with a lot of line rake. After a test flight you can bring it into trim. That beats starting high and forward and not having anything to trim.
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Walter:
You will never get a consensus here.
My most recent high wing Rearwin Speedster:
64", 6 pounds.
Leadout guides .032 wire - almost no flying load on them (screwed to bottom of the wing).
Line rake: (center of the lines) 2 degrees to the rear, behind the center of gravity.
Line elevation at the leadout: Same as the thrust line.
Flew right off the board, no adjustment was necessary.
Jim Fruit
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Walter
Check your email inbox.
Clancy
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Flew right off the board, no adjustment was necessary.
Jim Fruit
Hi Jim,
You have a real rarity. I have been told that, like entropy where there is a fixed amount of energy in the universe, there are a fixed number of CL model airplanes that fly right off the board and those were all used up by the mid '50's.
Keith
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Right. Mine "flew" too. But they flew better with some adjustment.
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Hi Jim,
You have a real rarity. I have been told that, like entropy where there is a fixed amount of energy in the universe, there are a fixed number of CL model airplanes that fly right off the board and those were all used up by the mid '50's.
Keith
Keith
You made me smile first thing this morning. I needed that. I missed my scheduled trip to the NATS because my Crohn's made me too sick at that time.
I am convinced that the success of the flying of the Rearwin Speedster was because of the help that you gave me at the time of designing the leadout guide.
Jim Fruit