l
F.8L Falco Construction Manual
21–1
Revision 4, March 1, 2002
Chapter 21
Fin Assembly
The fin is assembled just like the stabilizer, elevator and rudder. You have to make sure that the
fin spars will match the stabilizer spars. This can be accomplished in three ways:
One way is to glue the main stabilizer spar to the main fin spar, glue the intermediate fin ribs in
place, then glue the forward fin spar to both the fin ribs and the forward stabilizer spar and
complete the assembly of the fin. This method will insure that the fin spar spacing will match
that of the stabilizer spars. The primary disadvantage is that the skinning of the fin will be
difficult with the stabilizer in place. The skinning is normally done on a flat jig table. The length
of the stabilizer (roughly ten feet) will require that the table be at least five feet from the floor. In
addition, the ceiling height must also accommodate the elevator, and not every shop will do this.
The second way is to use a block of wood to hold the fin spars the required 350mm apart. This
block can be clamped in place, and it will assure the proper spacing. This is a compact method of
assuring that the fin will mate with the elevator. Since the block is not as wide as the stabilizer,
there will be plenty of working space around the fin while you are assembling it.
The third way is to build the fin with the stabilizer clamped in place. This method is the same as
the first method, except in this case the stabilizer is not glued to the fin. We think this method is
the best choice, and it will allow you to check the position of the forward fin spar with the
forward stabilizer spar as you assemble the fin. This method also allows you to skin the fin without
having the stabilizer in place. The only disadvantage is that the stabilizer will require that you
work around it while you assemble the fin.
We will describe this third method; however, you may use one of the other methods if you prefer.
❏
Cut the longeron cutouts in the main fin spar. There are three: two side longeron and the
bottom center longeron. Be careful to cut the tops of the side longerons to match the
lower profile of the main stabilizer spar.
Figure 1
❏
Install the triangular strips on the aft face of the fin spar. See Figure 1. Scuff-sand the
plywood before gluing.
Note:
You will have to cut a small clearance radius in these strips for the hinge bolt of the
center elevator hinge, and you will have to notch the strips around the upper fin hinges.
Some builders have gone to great difficulty to taper the triangular strips prior to gluing
them in place. We feel that the easiest method is to use 15x15 triangular strips and glue
Содержание F.8L Falco
Страница 1: ...F 8L Falco Construction Manual...
Страница 7: ...l F 8L Falco Construction Manual Revision 4 March 1 2002...
Страница 21: ...l F 8L Falco Construction Manual 1 8 Revision 4 March 1 2002...
Страница 29: ...l F 8L Falco Construction Manual 2 8 Revision 4 March 1 2002...
Страница 43: ...l F 8L Falco Construction Manual 5 4 Revision 4 March 1 2002...
Страница 65: ...l F 8L Falco Construction Manual 9 6 Revision 4 March 1 2002...
Страница 81: ...l F 8L Falco Construction Manual 10 16 Revision 4 March 1 2002...
Страница 109: ...l F 8L Falco Construction Manual 15 4 Revision 4 March 1 2002...
Страница 133: ...l F 8L Falco Construction Manual 17 10 Revision 4 March 1 2002...
Страница 145: ...l F 8L Falco Construction Manual 18 12 Revision 4 March 1 2002...
Страница 173: ...l F 8L Falco Construction Manual 21 10 Revision 4 March 1 2002...
Страница 229: ...l F 8L Falco Construction Manual 23 40 Revision 4 March 1 2002...
Страница 387: ...l F 8L Falco Construction Manual 28 26 Revision 4 March 1 2002...
Страница 393: ...l F 8L Falco Construction Manual A 6 Revision 4 March 1 2002...