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RANS S-21 OUTBOUND
10.
With the Stiffeners clecoed in place, lay the floorboard in the fuselage. Align
mounting holes and mark the Floorboard flange where it intersects the skin
stiffeners. Remove material from flange to prevent contact with Stiffeners.
Remove floorboard.
11.
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. A matched flush fit is what we are going for between the
edge of the door, boot cowling skin and windshield.
IMPORTANT: Remove tape only after final fit of doors and windshield.
12.
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 10E-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 10E-11.
13.
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.
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 10E-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.
18.
Cleco the Instrument Panel Frame to the forward side of tabs on Station 2
vertical tube. See FIGURE 10E-18. Slight trimming may be required depending
on weld beads. Cleco the Instrument Panel to the Panel Frame. This will help
hold the Frame straight. Trim the ends as needed to clear any structure or welds.
TEXT MANUAL
95
09/11/2018
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