RANS S-20 RAVEN
TEXT MANUAL
09/01/2013
06-02
10.
Apply masking tape to the Station 2 door opening tube for a trim reference
for the side panels of the boot cowl. Draw a line on the tape where the
centerline line is on the side of the tube.
IMPORTANT: Remove tape only
after final fit of doors and windshield.
A matched flush fit is what we are
going for between the edge of the door, boot cowling skin and windshield.
11.
There is one hole located in the upper forward corner of the Side Boot
Cowl Skin. Cleco the Side Skin to the upper side tab, before the curve in
the firewall, on the Firewall Support Angle. Refer to
FIGURE 06-11
. Align
the aft edge with the line on the tape at Station 2 tube. The notch in the
Skin should also line up with the bottom longeron. See
FIGURE 06-11
.
12.
Tape the Side Skins in place and verify position. Transfer drill #30 the top
aft welded tab and cleco. Work from the top to the bottom, transfer drill
#30 all welded tabs on the sides.
13.
Pull the sheet metal around the bottom corner of the firewall and mark
where the curve starts and stops. Remove the panel to form a tapered
curved section. This is done by working the metal over a 1” round tube or
rod clamped firmly to a vise or table. It works best to form the large radius
and taper to no radius at the aft end of the panel.
HINT: It may be wise to
test your forming skills on a piece of scrap sheet metal.
14.
Place Boot Cowl Stiffeners between welded tabs and Side Skin. Cut to
length, notch and trim as require to clear fuselage tubes. Refer to
FIGURE
06-13
. Transfer drill #30 through the tabs into the stiffeners. Remove and
layout #30 holes approximately every 2” inches on all stiffeners. Deburr
and re-cleco the stiffeners in place. Cleco from the inside to allow install of
the Sides.
15.
Transfer drill #30 through Stiffeners and Side Skins.
NOTE: Insert 1/8”
brass washers or shim material where needed between the tabs and Side
Skin if there is any buckling present as you cleco the Side Skins to the
Stiffeners.
HINT: Leave the washer stacks in place with the cleco on the
inside to keep track of how many and where they are used.
16.
Transfer drill #30 through the Firewall Support Angle tabs into the Side
Skins along the forward edge. The tabs should be either flush or slightly
back from the edge of the Side Skins forward edge. The Side Skin will
need to be tight against the tabs as it forms around the bottom curve. Use
duct tape to pull the skins tight around the corner.
17.
Transfer drill #30 through Bottom Skin, Stiffeners and welded tabs where
the Side Skins overlap. Cleco as you drill.
