09/11/2018
RANS S-21 OUTBOUND
TEXT MANUAL
136
WING CUFF INSTALLATION
38.
Trim wing cuffs as in
FIGURE 10G-37
. Hold cuffs on windshield and leading
edge spar. Find position of best fit for wing cuff, press down firmly against the
windshield and tape securely in place. Use a fine point marker and mark the
perimeter edge of the wing cuff onto the windshield if this was not done in a
previous step.
39.
Mark and trim cuffs flush with edge of windshield.
40.
Remove cuff and place 3/4" masking tape on leading edge spar, extending
outboard from wing attach bolt. Top edge of tape should be in-line with bo
lt’s
center-line. Re-install cuff and mark edge of cuff on tape. Mark top edge of tape
on cuff. Remove cuff and measure distance between mark on tape and b
olt’s
center; transfer measurement to cuff and drill 3/4" hole in cuff as per
FIGURE
10G-37
.
41.
Remove windshield and mask off for painting where indicated by the lines
marked for cuffs and windshield hold down strip. Paint with an Acrylic paint, black
is an excellent choice. This will hide glue used to bond the on the cuffs and hold
down strip.
42.
Paint wing cuffs as desired.
FINAL INSTALL OF WINDSHIELD AND SKYLIGHT
43.
Clean off the top back edge of the windshield and underside of the mating strip
with rubbing alcohol, making sure no debris is present. This prepares for bonding
the mating strip and windshield together.
44.
Place 1/2” Acrylic tape (VHB by 3M) under forward edge of the upper windshield
mating strip. Do not remove the peel strip on the underside until ready to lower
the mating strip. VHB is super sticky and you will have one shot at getting it
located properly. To accurately place the mating strip use two #30 drill bits
placed is holes near the outside edges. The drill bits act as guides when lowering
the mating strip onto the windshield. Pull off the peel strip and lower the mating
strip, press down evenly to make a secure seal and bond. Rivet all parts except
the windshield hold down strip together. Dip the rivets in clear silicon prior
installing to affect a water tight seal
