Installing The Triangle Supports; Aligning The Belly Pan - Model Tech SUKHOI 40 Instructions Manual

to match the contour of the belly pan. The top side
of each block should be flush with the bottom edges
of the belly pan. See photo # 8 below.
Photo # 8
MOUNTING
BLOCK
2) When satisfied with the fit of each block,
use 220 grit sandpaper and roughen the surface
of the belly pan where each block will be glued.
Roughening the surface of the fiberglass belly
pan will help strengthen the bond between
the epoxy and the fiberglass and prevent the
blocks from breaking off after they have been
glued in place.
3) Mix up a small amount of Kwik Bond 5
Minute Epoxy. Working with one mounting block
at a time, glue the block into the belly pan and
hold it in place with masking tape. When you
have glued in all four blocks, allow the assembly
to fully cure before proceeding.

INSTALLING THE TRIANGLE SUPPORTS

4) Remove the masking tape from the four
mounting blocks. Trial fit the two balsa triangle
supports (D-33) to the inside edges of each side
of the belly pan. The triangle supports should
also be centered in the belly pan. Use 220 grit
sandpaper with a sanding block to shape the tri-
angle stock to match the contour of the belly pan.
The top edge of the triangle stock should be flush
with the bottom edge of the belly pan. See photo
# 9 below.
Photo # 9
BELLY PAN
TRIANGLE
STOCK
stock, use 220 grit sandpaper and roughen the
surface of the belly pan where it will be glued.
BELLY
PAN
the epoxy and the fiberglass and prevent the tri-
angle stock from breaking off after they has been
glued in place.
Minute Epoxy. Working with one piece of tri-
angle stock at a time, glue the stock into the belly
pan and hold it in place with masking tape. After
you have glued both pieces in, allow the assem-
bly to fully cure before proceeding.
angle stock. With the wing securely attached to
the fuselage, trial fit the belly pan to the bottom of
the wing. The sides of the belly pan, at both the
front and the rear, should be flush with the sides
of the fuselage. The curve at the rear of the belly
pan should also be flush with the curve of the fu-
selage bottom.
help in alignment. The edges of the belly pan may
also need adjustment. If so, carefully sand the
edges using 220 grit sandpaper until you are sat-
isfied with the fit.
tion of the rear mounting blocks that interfere with
the wing bolt doubler and wing mounting screws.
pan in place using pieces of masking tape. See
photo # 10 below.
Photo # 10
8
5) When satisfied with the fit of the triangle
Roughening the surface of the fiberglass belly
pan will help strengthen the bond between
6) Mix up a small amount of Kwik Bond 5

ALIGNING THE BELLY PAN

7) Remove the masking tape from the tri-
You may find it necessary to press the sides
of the belly pan against the wing surface to
8) Using a modeling knife, remove the por-
9) When satisfied with the fit, hold the belly
BELLY PAN