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Old 01-20-2006, 07:18 AM   #11
Dave Holmes
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Originally Posted by Tomahawk
Tomahawk wrote:
I have found hook knives the easiest for cutting out flutes on coro. I just bought the blades and taped one to a scrap piece of wood for a handle.

Take two blades, one on each side of the piece of wood, fasten them with a couple of small machine screws and nuts and you can remove the side of a single flute with one stroke of the knife. Choose a stick that is just thick enough to space the blades apart a bit less than the internal width of the the flute.
Hey Dave sometimes a pic is worth a thousand words.

That's the one! Obviously you bought the same magazine as me!
Dave Holmes

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Old 01-21-2006, 06:42 PM   #12
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To cut the hinge I just use a regular olfa exacto knife. Set the depth to a height that will not reach the other side. Works well!
Brandon Webber
MAAC # 69932J
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Old 01-22-2006, 06:52 PM   #13
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The single best way to add flex to those hinges once the flute is cut, is to fold back the coro making a definite crease mark, then run 220 sandpaper along that crease, staying away from the outer edges by about one inch. Two passes is all it should take.

For ailerons and longer runs as such, keep in about 1 inch, and sand 4 inches, leave another 1 inch, and then sand 4 inches again, and keep repeating until you do the whole length.

Remember, about 2 firm passes with 220 grit is all you need to soften it up enough to make it floppy, without cutting through the coro.

This makes for the most attractive hinge and is a lot easier than cutting through some sections of the flute as stated in some spad sites.
Dan "Buzz" Paluzzi
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