Rans S-7S COURIER, Text Manual

Page: 133 / 203

03/16/07
06F-01
S7-S COWLING ASSEMBLY AND INSTALLATION
(REFER TO PARTS PAGE # 006-14, 006-16 FOR PARTS SELECTION)
ASSEMBLY
Refer to FIGURE 06-16 to 06-20
IMPORTANT: The Boot Cowl, Engine, 1” Spacer and Spinner Backing Plate
must be installed prior to fitting the cowling. If Firewall Forward was purchased
less prop, contact RANS for the proper 1” Spacer.
NOTE: It is also recommended to have the entire engine installation completed.
Temporarily install the propeller spacer and the spinner backing plate to the
propeller flange of the engine.
Tape two 3/8" thick wood strips (or similar material) to the aft side of the spinner
backing plate as shown in
FIGURE 06-16 .
Clamp or tape the lower cowling in place with the forward side touching the 3/8"
spacers. The cowl should fit tight around station 1 and be centered on the
spinner backing plate. Check for proper position and alignment.
Mark cut lines; take cowling bottom off and trim closed to the line. HINT: Aviation
snips, drum sanders and sanding blocks work well for trimming. Do not trim all
the way to the line. It is better to check fit before final trimming is performed.
Trim the bottom trip lip as per FIGURE 06-17.
Trim the prop-opening flange to 1".
Locate and drill the two exit holes for the drain tubes. These holes should be
approximate ¼” larger in diameter than the drain tubes.
Locate and drill a hole for excess to the drain of the gascolator.
Trim the forward side of the top cowling to match the bottom.
With the lower cowling on the fuselage, place the top cowling on the aircraft. It
should fit tight over the top of the boot cowl.
Mark and trim the top cowling. Work in steps; do not trim in one step. It is easy to
trim too much material off.
Locate and cut the oil door opening. Reference FIGURE 06-18 and use the cut
template in FIGURE 06-19 . Check fit with parts as per parts manual. Cut opening
large enough to allow the oil door to fit even after paint.