RANS S-20 RAVEN
TEXT MANUAL
06/09/2015
05-03
18.
When attaching the Strut Attach Plates to the Spars, it will be necessary to
drill out the spars to 3/8" diameter.
IMPORTANT: Do NOT drill the Strut
Attach Plates to 3/8”.
The most accurate way to drill the 3/8 " holes is to
first drill 1/4” and bolt one end of the Strut Attach Plate to the Spar with a
1/4” bolt.
19.
Drill 1/4” and bolt a second hole using the Strut Attach Plate as a guide.
Drill the third 1/4” hole, remove the Strut Attach Plate, and drill all three
Spar holes to 3/8 ".
HINT: A Unibit
®
step-drill produces the best results.
IMPORTANT: Make sure the bit you use produces a tight fit between
bushing and Spar. REMINDER: When drilling through tubing, drill from
each side.
Deburr and insert the Spacer Bushings.
20.
When installing the anti-crush Spacer Bushings into the Spars, each
Bushing should be flush with the outside surface of the Spar. See
FIGURE
05-18
.
NOTE: It is possible the Spacer Bushings are slightly too long and
may have to be filed down to the outer dimension of the Spar tubing.
21.
Drill out the Long Wing Channel and the U-Bracket to allow for the 1/4”
Bolts.
22.
Bolt the Strut Attach Plate and Long Wing Channel (Leading Edge Spar),
or the U-Bracket (Trailing Edge Spar), to their respective Spar.
23.
Step drill the hole 8” inboard from the tip end on the
LEFT
Leading Edge
Spar to 3/4” using a Unibit
®
step-drill on both sides of the Spar. Refer to
FIGURE 05-02.
This is the location for the Pitot/Static Probe.
24.
Install the 3/16" Nut Plates to all Flap Hinge locations on the Trailing Edge
Spar. Refer to
FIGURE 05-03
for locations. Place the Nut Plates on the
forward side of the Spar and secure with #40 aluminum pop rivets.
HINT:
Use a 3/16” bolt to hold the nut plate in place when drilling.
Position nut
plates horizontally in-line with the Spar.
25.
Install Trailing Edge Spar Root Fittings and Long Wing Channels as per
parts manual to both Trailing Edge Spars. Remove equal material from the
forward and aft side of the Root Fitting. Profile, with a fine-tooth file, to
achieve a perfect fit inside the Spars.