Parts Cox TD-4

Winging it!

I screwed this thing up a bit.  Actually a lot.  Instead of first  referring to Mark's illustration I got on-line and found where someone indicated that the TD-4's wing was 20" so that's the length to which I cut the replacement wing.  Later, I found Marks drawing measured at 21 3/16" which he verified in a PM.  

Darn, darn, darn.  I did not want to waste a nice sheet of 1/16" balsa so I will just add winglets making up the difference.  Besides I see some wing tip droop in pictures (which Mark does not see, so there probably isn't any) so I will build (sand) that in too.

Ok.  So the extreme camber of the TD-4 at the wings root evens out to somewhat less at the tips. (At least when you are using replacement balsa)  So I guaged the bend and cut/sanded some 1/4" balsa to fit with the fat part toward the leading edge.  Sorry, but this gets complicated.  The TD-4's wing is straight accross at the leading edge and tapered at the trailing edge, not much about 1/4" at the tip to zero at the root.

Cut it that way.  But when I glued the tips on I unknowling (aka stupid, not paying attention) swapped ends glueing it with the fat end toward the trailing edge.  Hmm, toss the whole thing or come up with something.  So as a cure I tapered the wing on what was the leading edge to match the trailing edge,not factory but it works.  

As the center piece is unattached I just swapped it end for end.  Works for me.  Bevel sanding at the tips and three coats of Minwax sanding sealer now I have my droop and 21 3/16".







I have to do something about the rubber band hold-on's.  They do not fit nicely into the slots. I'm thinking pegs maybe or eyelets in the wing itself pulling straight up instead of at an angle.  

Gloss yellow, a decal or two. Thinking about painting the plastic matte blue, same as I have used on the Corsairs.