FRAUNDORFERS Fun-RES, Manual

6 

sure that the joiner bags and the joiner fit into the recess easily but without 
movement.  
 
 
 
Next clue the prepared carbon strips in the milled channels 
of the main wing panel. For this you best use epoxy or a 
low viscosity super-glue.  
 
 
 
 
Before you glue (Epoxy) the joiner bags and 
the joiner into the main wing panel you have 
to sand (120 grit sandpaper) both parts 
slightly to assure a proper bond. In addition 
close the joiner bag on the end which is glued 
into the main wing panel with some modelling 
clay (Play-Doh 'borrowed' from your kid works 
as well) or wax to avoid epoxy running into it. 
Now glue (epoxy!) the joiner bags into the 
main wing panel. Make sure that the joiner 
bag has good contact with the balsa (left- and 
right-side) as well as the carbon strips (top and 
bottom). 
Now clue the carbon strips (as you have done 
with the main wing panel) in both inner tips.  
 

 
 
For the next steps we don't recommend to do both sides in parallel. 
 

Give the joiners on the side which will be glued into the tip a light sanding to 
(120 grit sanding paper) to get a proper bond when gluing them into the tip. 
Slide the joiner into the joiner bag of the main wing panel).  Now put some 
Epoxy into the cut out slot of the tip and slide the tip onto the joiner. There 
shouldn't be a gap now between the main wing panel and the tip (

Do a 'dry fit' 

in advance

) . To assure the proper dihedral lay a 44mm balsa block under the 

end of the tip and let the Epoxy cure. Repeat the steps for the other side.