RANS S-20 RAVEN
TEXT MANUAL
09
/01/2013
11A-01
WINGS
WING WASHOUT RIGGING
(AFTER WING INSTALLATION)
NOTE: Washout is set after the Wings and Struts are installed.
Washout is set by adjusting the lower rear strut fitting (rod end).
A Digital Level can simplify rigging procedures.
CAUTION
The Rod End must be screwed into the strut fitting a
minimum of 10 complete turns.
1.
Fabricate a rigging level as per
FIGURE 011A-01
. Use a straight board or
angle (a straight 2x4 will work). Fabricate three 1/4” thick shims as shown
and attach two 1/4” thick shims to the rigging level.
2.
Air up the tires to high pressure and set the brakes, or better yet remove
main wheels and place axles on wooden blocks. The aircraft must be rigid.
3.
On taildragger models, raise the tail of the airplane by placing the Tail
Wheel on a sawhorse or other support until the wing root is level. On trike
models, raise of lower the nosewheel. Use the fabricated level placed
with the 1/4” shims on the bottom of the leading and trailing edge spar to
measure. Adjust until level reading is obtained.
4.
Do
NOT
move aircraft.
5.
Tape an additional 1/4” shim to the level as shown in
FIGURE 11A-01.
Place
level just outboard of the Lift Strut Attach Plates with the two 1/4”
shims under the trailing edge spar. Adjust Rod End in lower end of AFT
Lift Strut until level reading is obtained.
CAUTION: The Rod End must be
screwed into the strut fitting a minimum of 10 complete turns.
6.
Repeat for the other side.
NOTE: Only one wing root is used as reference.
Do NOT adjust airplane to level on other wing root.
7.
Tighten all connections and check.
