Fuselage Continued
65.
Remove the covering over the slots in the fuselage deck immediately in
front
of the
windscreen. Fit the previously assembled front spar/cabane strut assembly (S1/CS1) as
shown. Ensure that the cabane struts are seated fully within the slots, contacting the tops
of the fuselage sides. View the assembly from the side, and ensure that it is perpendicular
to the fuselage. Bond with medium CA.
66.
Fit cabane strut part CS2 to the slot in S1, and the slot in the fuselage decking F27. Bond
with thin CA.
67.
Remove the covering over the slots immediately behind the cockpit, forward of those tiny
parts F19. Fit the previously assembled rear spar/cabane strut assembly (S2/CS1) to these
slots and the flat along former F3. Ensure that the cabane struts are seated fully within the
slots, contacting the tops of the fuselage sides. View the assembly from the side, and
ensure that it is perpendicular to the fuselage. Bond with medium CA.
68.
Fit the 1/8 in. balsa center rib W8 to the slots in the spars S1 and S2. Ensure that it is
seated fully, and bond to S1 and S2 with medium CA.
69.
Fit the
left
wing panel to the fuselage assembly by slipping the tabs at the end of the spars
S1 and S2 into the corresponding slots within rib W3. Tack glue the wing panel to the
fuselage assembly only where the spars S1 and S2 contact rib W3.
70.
Ensure that the wing panel fits flush on top of rib W8, covering only half of the rib. The
remaining area of the rib will receive the other wing panel when it is installed. Tack glue the
wing panel along rib W8 to retain.
71.
Repeat steps 69 and 70 to install the
right
wing panel.
72.
Turn model over, and fit the
left
set of the previously assembled flying struts (FS1/FS2/FS3)
to the notches in rib W5 and the corresponding notches within the lower edge of the
fuselage.
Note: The arrows on the struts indicate the ends that will contact the fuselage - refer to plan
for proper orientation. Tack glue the struts with medium CA.
In the same manner, install the
right
set of struts on the other side of the fuselage.
View the model from the front. The wings should appear to have the same amount of
dihedral (tilt of the wing) on each side. There should also be a slight twist to the wing,
where the trailing edge rises slightly higher than the leading edge of the wing as the span
progresses towards towards the tip.
This twist, or wash-out, must be equal on both
sides of the wing.
If any adjustment to the wing alignment and or wash-out is required,
slide the ends of the struts around in the slots in ribs W5 until the wings are aligned
correctly and tack glue to retain positioning.
Inspect your work and the symmetry of the wing. If satisfied that your have installed the
wings properly, thoroughly bond the wing panels to the struts, center rib W8, and S1/S2
plywood spars with medium CA.
Congratulations! Your Stevens AeroModel Heath LNB-4 UM™ is complete! Follow the instructions that
came with your transmitter to bind the receiver to the transmitter. Proceed to the Setup and Pre-Flight
sections to prepare your model for flight.
Build Instructions
Heath LNB-4 UM Parasol Build Instructions. © 2012 Stevens AeroModel all rights reserved.
!
Page 24
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