Old School Model Works Lark Construction Manual page 8

n
Step 41 - Wing Assembly (ailerons)
Locate the two lengths of 5/16" x 1-1/4" tapered balsa sticks.
These are used as the ailerons. Refer to the plan for the correct
length, then cut one aileron from each piece. Also note the slight
angle on the aileron tips and cut/sand that in as well.
Note - if you prefer to make your Lark a 3-channel system (without
ailerons), you can glue these strips to the trailing edge of each wing
to continue on the airfoil shape of the wing. We've not done this
with any of the prototypes as we prefer ailerons, but there could
be a couple of you out there that are aileron-phobic, so here's your
chance to go really "old-school".
This completes the assembly of the wing. Now it's time for the
tail surfaces, starting with the vertical fin.
n
Step 42 - Vertical Fin Assembly (prep)
Position the vertical fin plan
over your building surface and
tape into position. Tear off a
length of waxed paper long
enough to cover the plan and
tape that into position.
n
Step 43 - Vertical Fin Assembly (VF1, VF5)
Locate VF1 and VF5 from BP13. Pin
VF1 in position, then glue VF5 to
VF1 and pin it in position.
n
Step 44 - Vertical Fin Assembly (VF2)
Locate VF2 from BP13. Glue VF2 to VF1 and pin
it in position.
n
Step 45 - Vertical Fin Assembly (VF3, VF4A, VF4B)
Locate VF3, VF4A, and VF4B from BP13. Glue
VF3 to VF2 and pin it in position. Then glue
VF4A and VF4B into position as shown.
n
Step 46 - Vertical Fin Assembly (VF6)
Locate VF6 from BP13. Glue VF6 to VF3 and pin it
in position.
n
Step 47 - Vertical Fin Assembly (VF7)
Locate VF7 from BP13. Glue VF7 to VF6 and
pin it in position.
n
Step 48 - Vertical Fin Assembly (VF9)
Locate VF9 from BP13. Note that it has a
small circle engraved, noting it's top edge.
Glue VF9 to VF7 and pin it in position.
Page 8
n
Step 49 - Vertical Fin Assembly (VF8)
Locate VF8 from BP13. Glue VF8 to VF7 and
VF9.
n
Step 50 - Vertical Fin Assembly (VF15)
Remove the pins from the vertical structure and
lightly sand the surface to make sure it's smooth.
Now, locate one VF15 from BP18. Glue it in place
over the rear section of the structure, making sure
that it's perfectly aligned as shown here.
n
Step 51 - Vertical Fin Assembly (VF16)
Locate VF16 from BP17. Glue this in place
over the front of the structure, again,
making sure it's perfectly aligned and fully
inserted into the VF15 tab.
n
Step 52 - Vertical Fin Assembly (VF15, VF16)
Remove the vertical fin assembly and
flip it over. Again, lightly sand the
structure so it's flat.
Then locate the other VF15 from BP18
and VF16 from BP17. Glue these in
place over structure, just as you did for the fin's port side, making
sure the pieces are perfectly aligned.
n
Step 53 - Rudder Assembly (VF10)
Locate VF10 from BP13. Pin it in position.
n
Step 54 - Rudder Assembly (VF12)
Locate VF12 from BP13. Glue it in place to the bottom
part of VF10.
n
Step 55 - Rudder Assembly (VF11, VF13)
Locate VF11 and VF13 from BP13. Glue them
in and pin them in position.
n
Step 56 - Rudder Assembly (VF14)
Locate VF14 from BP13. Glue it in position between
VF10 and VF11.
n
Step 57 - Rudder Assembly (VF17)
Remove the pins from the rudder structure and
lightly sand the surface to make sure it's smooth.
Now, locate one VF17 from BP17. Glue it in place
over the rear section of the structure, making
sure that it's perfectly aligned as shown here.
www.oldschoolmodels.com Construction Manual