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WING ASSEMBLY NOTES

READ AND UNDERSTAND THE ENTIRE PROCESS BEFORE STARTING !!!
ALL CUT OUT TEMPLATES ARE LOCATED IN SECTION 12

These notes are to “assist” the information contained on the assembly pages.

ASSEMBLE COMPRESSION STRUTS

First part of the Wing Assembly is to assemble the

compression struts.  All Compression Struts require Tube Connectors on both ends.
Two  of  the  struts  also  have  Aileron  Bellcranks  on  them.    These  will  have  a  Left  and  Right  and
should  be  marked.  They  also  have  a  FWD  and  AFT  as  indicated.  Fittings  20441  and  20442  are
installed  into  the  Compression  Struts.    Run  a  1/4”-20  bolt  (10423)  into  the  Threads  to  assure
thread  condition.    During  final  assembly  of  all  Grade  5  bolts  use  Loctite  as  thread  adhesive.
Anytime these bolts are loosened or removed you must re-apply the Loctite

P-4   Use Vise Grips to hold the 10702 Bearing in place for drilling and riveting.  The 1/16” drilled
holes must be deburred before installing the rivets.

P-7   General Arrangement of the Wing Assembly.  Follow the lettered details starting with “A”.

P-3  On the SPRINT wing the bolt threads can point down.  The SPORT wing requires the threads
point up.  The 20310 Safety Rings MUST be oriented as per the drawing.  A 3/16” washer can be
added between the Safety Ring and the Bellcrank.

WING COVERS (Fabric) INSTALLATION

The assembly instructions jump around on this

procedure.  It’s IMPORTANT to read and completely understand the tasks for this step.
Basically,  two  Root  ribs  and  one  Tip  ribs  are  installed  so  that  the  orientation  of  the  fabric  is
established on the Spars.  The Root end of the fabric is secured.   Only then can tension be pulled
towards the tip. We use a cheap Wal-Mart type fish scale to pull tension.

The illustrations on these pages show both wings being installed at once.  This will require four (4)
wood saw horses or supports.  It is also feasible and doable to assemble one wing at a time.  The
IMPORTANT  factor  here  is  the  location  of  ROOT  END  of  the  wing  fabric.    When  completed,  the
CENTER GAP COVER must overlap the 2” wide Velcro sewn on the ROOT END of the wing fabric.
Once the fabric is on the spars,  the next step is to heat cut the slits in the Trailing Edge
Pockets to allow the Rib Ends to set against the trailing Edge spar.
Installing  the  three  ribs  mentioned  and  also  the  (temporary)  Compression  Strut  at  the  extreme
Outboard  end  helps  position  the  fabric  location.    Once  tension  is  pulled,  install  the  Large  head
Rivets (20164) thru the grommets into the spars.  BE VERY CONFIDENT IN THIS STEP !!!

COMPRESSION STRUT HOLES IN FABRIC

These are the large holes that allow the compression

struts to pass thru the fabric onto their respective spars.  Using the “hidden” bolt holes as a guide,
make a mark to be used with the Compression Strut Template.  This one Template is used for both
the Leading Edge holes and the Trailing Edge holes.
DO NOT heat cut the Compression Strut  Bolt Holes at  this time.   That  is done during the Wires /
Cables install.

This Template is NOT Full LENGTH.  The Finish dimension of this template is indicated on the Side
of the Template.  You should make this template out of a durable material.

Section 4

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