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RANS S-21 OUTBOUND
Refer to section 2 of parts and figure drawings.
Use a tube with a 1 1/4" outer diameter to roll form the leading edges of the rudder skin.
1.
See FIGURE 02-01 for rudder skin bending and orientation.
CAUTION: If bent in the wrong direction, the skin must be replaced.
2.
Set the tube on a table and line up the holes in the leading edge of the skin along
the top of the tube.
3.
Transfer drill (2) holes near the ends from the skin to the tube and cleco in place.
4.
Check the alignment of the holes in the skin to the top of the tube. They need to
follow the top of the tube pretty well.
5.
Transfer drill and cleco the rest of the holes in the skin to the tube.
6.
Clean the table to be used from debris and chips. Flip the skin/tube over and
place it on the edge of the table with the clecos hanging off.
7.
Drill a hole at either end of the 1 1/4" O. D. tube outside diameter and insert a
screwdriver or anything handy to be used for leverage.
8.
This will probably take 2 people. Force the tube down toward the table and rotate
the tube to roll the skin tightly around the tube. Roll all the way until the clecos
are about 90° to the table. When finished, the skin should be bent to 85-90°.
9.
Repeat this process to form the other leading edge of the rudder skin.
1.
Press the bronze flange bushings into the hinges before assembly. See part
drawing for orientation. Ream the bushings to #11, if a 3/16" bolt will not insert
into the bushings.
2.
Draw a centerline down the un-drilled flange of each rib.
3.
Cleco and rivet the Rudder Spar, Upper Rudder Ribs, and Hinges together as
shown in the PARTS MANUAL DRAWING.
4.
Bolt the rudder horn mount tube to the spar.
5.
Cut and deburr the bend tags on both ends of the Rudder Skin.
6.
Cleco the rudder skin to the Left side of the frame assembly. The leading edges
of the skin curl around to meet each other. Do NOT cleco the leading edge at this
time.
7.
Cleco and rivet the rudder horn rib doubler to the lower rudder rib.
TEXT MANUAL
RUDDER
RUDDER SKIN FORMING
RUDDER ASSEMBLY
41
09/11/2018
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