Model Forum / Radio Controlled / Air Models / January 2006

I did this once with a  80" ws Dynaflight Chipmunk. I built the wing
with an aluminum tube that fit inside a built in socket in each wing
half. Then the wing halves were held together by two small aluminum
rivitts thru the plyuwood root ribs and then secured with "cotter type"
keys thru a hole in each rivit. This was assembled first as a single
unit and then bolted to the fuse in the normal fashion.

This was easier to do than it is to try to describe. The key point here
is there were no mods made to the fuse at all. This held up fine right
up till I forgot I had a 5 cell battery pack, checked the flightpack
battery with my trusty digital meter, saw it read 5.3 and just knew all
was well. Wrong,  the plane made it about 60 seconds into the flight
and the 5 cell battery went way dead. Oh well live and learn.

Someone makes kits.  I believe the name is Gator RC Products.  It's a
6061-T6 aluminum center tube and a fiber sleeve.  You build the sleeve
into your wing and the tube carries the moment.  You need to do a good
job coupling the spar to the tube if you want it to be strong and light,
and you may have space issues on a wing with dihedral.

   The ARF Senior uses a flat aluminum bar with a little angle in it
for dihedral (slightly V-shaped).  This slides into slots between the
front spars.  You might want to download the ARF assy manual from the
Sig website too see haw it all goes together.

  CR

   The ARF Senior uses a flat aluminum bar with a little angle in it
for dihedral (slightly V-shaped).  This slides into slots between the
front spars.  You might want to download the ARF assy manual from the
Sig website too see haw it all goes together.

  CR

   The ARF Senior uses a flat aluminum bar with a little angle in it
for dihedral (slightly V-shaped).  This slides into slots between the
front spars.  You might want to download the ARF assy manual from the
Sig website too see haw it all goes together.

  CR