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Mar 06, 2004, 10:41 PM
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Indianapolis, IN
Joined Sep 2001
16,619 Posts
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BluSloWing a nice and slow Fan Fold Wing
Here's what I've been working on. It's a bit larger than my previous wings. I wanted to optimize it for the DCM-189 and AAA NiMh cells.
WS: 42" Area: ~350 sq" Weight: 11oz Power: DCM-189 (J250), 'C' (5.33:1), 10x4.7 Batteries: 8x720NiMh (AAA) Basically, it takes most of a full sheet of Fan Fold. The construction method is something I've been working on perfecting for a while... You form the airfoil, and then fold over the LE to strengthen it, w/o needing a spar  The test flights of this version (there's been a few leading up to this) went very well last weekend. It just took me a while to clean up the drawings and get time to post a thread. Here's the plans. <edit> New zip file uploaded. Some dummy (who, me?) messed up the pdf files on the old version... |
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Last edited by Gene Bond; Mar 08, 2004 at 10:50 AM.
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Mar 06, 2004, 10:43 PM
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Indianapolis, IN
Joined Sep 2001
16,619 Posts
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Here's a view from the top:
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Mar 06, 2004, 10:44 PM
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Indianapolis, IN
Joined Sep 2001
16,619 Posts
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Here's the belly, you can't really see the underchambered airfoil in this view, but the plans show it:
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Mar 06, 2004, 10:45 PM
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Indianapolis, IN
Joined Sep 2001
16,619 Posts
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And the edge kind of shows the folding method:
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Mar 06, 2004, 10:46 PM
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Indianapolis, IN
Joined Sep 2001
16,619 Posts
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Here's some construction pictures:
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Mar 06, 2004, 10:46 PM
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Indianapolis, IN
Joined Sep 2001
16,619 Posts
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Construction continues, mark the fold lines:
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Mar 06, 2004, 10:47 PM
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Indianapolis, IN
Joined Sep 2001
16,619 Posts
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Cut it out:
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Mar 06, 2004, 10:48 PM
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Indianapolis, IN
Joined Sep 2001
16,619 Posts
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Slot the nose a little:
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Mar 06, 2004, 10:48 PM
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Indianapolis, IN
Joined Sep 2001
16,619 Posts
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Score the fold lines with the tail of a Sharpie:
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Mar 06, 2004, 10:49 PM
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Indianapolis, IN
Joined Sep 2001
16,619 Posts
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Like so:
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Mar 06, 2004, 10:53 PM
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Indianapolis, IN
Joined Sep 2001
16,619 Posts
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Roll the airfoil, bend the flap over, and glue and tape the flaps down! It gets a little fiddly when trying to fit the nose slot perfect. Some of mine have been better than others, but I just do the best I can, then throw some ProBond in the gaps before taping, and it seems to be very strong!
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Mar 06, 2004, 11:16 PM
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Houston, TX
Joined Feb 2004
227 Posts
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Very Interesting... I'll try one!
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Mar 06, 2004, 11:36 PM
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La Grange, Georgia, United States
Joined Nov 2001
797 Posts
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Interesting idea ... might be fun to try this same idea on a straight wing. It would make a nice undercambered wing for a warbird type plane.
Very original! Eddie |
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Mar 06, 2004, 11:47 PM
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Houston, TX
Joined Feb 2004
227 Posts
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Thanks!
What side of town do you live on? What rc field do you recommend? I have an uncle there near speedway/eagledale. |
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Mar 07, 2004, 07:39 AM
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Indianapolis, IN
Joined Sep 2001
16,619 Posts
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Quote:
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