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ZODIAC
601 XL
Zenith Aircraft Company
www.zenithair.com
RUDDER SKELETON
Section 6-T-4, Page 1 of 13
Revision 3.21 (12/10/07)
© 2006 Zenith Aircraft Co.
Kit parts that make up the rudder skeleton.
ZODIAC CH 601 Series
Parts are labeled for easy
identification with a part
number and description:
Part number example:
6T4-4 Vertical Tail Spar
6 - Zodiac CH 601 model
T - Rudder section of the
Aircraft drawings.
4 - Page 4 of the Rudder
drawings.
4 - Part 4 on page 4.
In addition to this photo
assembly guide, also refer
to drawings 6-T-4 and
6-T-5 for technical
information.
Exploded view of the
rudder assembly
This manual has been
prepared for assembly of
the Rudder Starter Kit
supplied with the
predrilled Rudder Spar
and Rear Skin, (starting
Nov. 2006). Previous
versions did not include
the predrilled Rudder
Spar or Rear Skin.
ZODIAC
601 XL
Zenith Aircraft Company
www.zenithair.com
RUDDER SKELETON
Section 6-T-4, Page 2 of 13
Revision 3.21 (12/10/07)
© 2006 Zenith Aircraft Co.
Mark the bottom side corner on the side flange of the doubler. Measure
10mm from the end and mark a line to the bottom corner.
6T4-5 Doubler Angle
Note: The spar flange
should not be flush with
the edge of the doubler.
Do not use a scribe or a
pencil to mark.
Trim the bottom corners of the doubler angle.
It is a good idea to practice on piece of scrap material to get a feel for the
snips first.
To choose between the
red or green snips: The
bottom jaw is positioned
under the cutoff piece.
The bottom jaw will cause
the material to curl, let
this happen to the piece
that is removed.
Left Photo: Green
handled snips.
ZODIAC
601 XL
Zenith Aircraft Company
www.zenithair.com
RUDDER SKELETON
Section 6-T-4, Page 3 of 13
Revision 3.21 (12/10/07)
© 2006 Zenith Aircraft Co.
Measure up 30mm from the bottom of the doubler and mark a reference line
along the edge of the doubler.
Handi-Clamp
P/N: TP640HC
The doublers extend
30mm past the bottom of
the Spar.
Raised above the workbench and to provide solid backing when drilling).
Install a rubber stop on
the drill bit. (small piece of
rubber hose sliced in
half)
ZODIAC
601 XL
Zenith Aircraft Company
www.zenithair.com
RUDDER SKELETON
Section 6-T-4, Page 4 of 13
Revision 3.21 (12/10/07)
© 2006 Zenith Aircraft Co.
Drill and cleco every other hole. Finish drilling without adding more clecos.
Edge Distance = e
This is the distance from
the center of a hole to the
edge of the material.
In general e = 3 X D
D is the diameter of the
hole.
For the A4 and A5 rivets
e = 10mm
Drill Sizes:
A3 rivet/pilot hole: #40
A4 rivet: #30
A5 rivet: #20
Mark a line 20mm from the top edge of the bottom flange.
Slide the rib flange between the doublers and the spar.
Bottom rib 6T4-6
ZODIAC
601 XL
Zenith Aircraft Company
www.zenithair.com
RUDDER SKELETON
Section 6-T-4, Page 5 of 13
Revision 3.21 (12/10/07)
© 2006 Zenith Aircraft Co.
Line up the bottom of the spar on the 20mm line.
Reinstall the bottom clecos in the spar.
CLAMP the bottom of the
doublers to the side
flange of the rib.
Drill and cleco.
Add a hole 10mm up from
the bottom of the
DOUBLER (through the
rib flange). When drilling
be careful not to drill
through and hit the rib
web on the other side.
ZODIAC
601 XL
Zenith Aircraft Company
www.zenithair.com
RUDDER SKELETON
Section 6-T-4, Page 6 of 13
Revision 3.21 (12/10/07)
© 2006 Zenith Aircraft Co.
EDGE MARKER BLOCK:
P/N: 6352
Tighten the screw on the gauge arm when the marker is on the reference
line. Pull the marker to strike a line.
First mark a reference line
along the edge of a
practice piece of material.
Edge distance = 9mm
Mark the flange rivet line on all 3 flanges: front and sides. Rear ribs 2, 3, 4
and on the nose rib.
Free hand method: use
your finger as a gauge to
hold the marker equal
distance to the edge.
ZODIAC
601 XL
Zenith Aircraft Company
www.zenithair.com
RUDDER SKELETON
Section 6-T-4, Page 7 of 13
Revision 3.21 (12/10/07)
© 2006 Zenith Aircraft Co.
Position the rib on the back side of the spar.
The pre-drilled holes in
the spar web are
measured from the
bottom end of the
doublers. Refer to
drawing 6-T-5 for the rib
locations.
Adjust the position of the rib until the rivet line on the rib flange is visible
through the pre-drilled holes in the spar.
Clamp the rib to the spar.
Use the toggle clamps.
ZODIAC
601 XL
Zenith Aircraft Company
www.zenithair.com
RUDDER SKELETON
Section 6-T-4, Page 8 of 13
Revision 3.21 (12/10/07)
© 2006 Zenith Aircraft Co.
Position the spar on its side (raised on 2x4 blocks to keep the clamps off the
workbench).
Drill and cleco the two middle holes. Remove the clamps and drill the two
outer holes.
View of rib flange.
Drill and Cleco rear ribs 3 and 4.
Rear rib #3, the spar
flange points down, the
side flanges point up.
Refer to drawing 6-T-5 for
the orientation. The
hidden line (dash line)
represents the web (flat
section of rib).
ZODIAC
601 XL
Zenith Aircraft Company
www.zenithair.com
RUDDER SKELETON
Section 6-T-4, Page 9 of 13
Revision 3.21 (12/10/07)
© 2006 Zenith Aircraft Co.
6T4-1 Nose Rib
To center the nose rib on spar: Clamp the extrusions to the rib flange. (On
the clamp, push the handle forwards).
EXTRUSIONS.
Upper bearing 6T4-3
Qty: 2
ORIENTATION: flange points down.
Squeeze the ends of the
extrusions together to
center the rib on the spar.
ZODIAC
601 XL
Zenith Aircraft Company
www.zenithair.com
RUDDER SKELETON
Section 6-T-4, Page 10 of 13
Revision 3.21 (12/10/07)
© 2006 Zenith Aircraft Co.
Check the rivet line on the rib flange is visible through the pilot holes.
Clamp the rib to the spar.
Remove rib #3 to drill the nose rib.
6T4-1
Drill and Cleco the nose
rib to the spar.
Re-install RR#3
ZODIAC
601 XL
Zenith Aircraft Company
www.zenithair.com
RUDDER SKELETON
Section 6-T-4, Page 11 of 13
Revision 3.21 (12/10/07)
© 2006 Zenith Aircraft Co.
Check: Center the bent strip on the spar.
Clamp the Bent Strip to the spar when the line is visible through the predrilled
holes in the Spar. Back Drill through the spar into the bent strip.
BENT STRIP 6T5-5
Mark a line 10mm from
the bottom edge.
Remove the bent strip from the spar to drill the Tip Rib:
Drill 2 holes in the bent strip. First mark the rivet line 9mm from the aft edge,
then come in 9mm from the ends.
Position the Bent Strip on the Tip Rib so the line is visible through the holes
in the Bent Strip.
Drill and cleco the Bent Strip to the Tip Rib.
9mm edge distance.
TIP RIB 6T4-2
Mark a line at 60mm from
the front of the rib.
ZODIAC
601 XL
Zenith Aircraft Company
www.zenithair.com
RUDDER SKELETON
Section 6-T-4, Page 12 of 13
Revision 3.21 (12/10/07)
© 2006 Zenith Aircraft Co.
Deburr the holes and rough edges, file and radius any sharp corners. Cleco
the Doublers and Ribs to the Spar.
Burs in aluminum are very small; most can be knocked off with a flat file: lay
the file flat on the rivet line and push it forwards.
An alternative method is
to use a large drill bit,
and to give each hole a
quarter turn. Remember
to deburr both sides of
every hole.
The diameter of the machined nose piece on the riveter is the same diameter
as the rivet head. Differently sized nose pieces are required for the A4 and
A5 rivets – don’t pull A4 rivets with the A5 nose piece.
Special machined riveter
nose piece
Hand riveter
ZODIAC
601 XL
Zenith Aircraft Company
www.zenithair.com
RUDDER SKELETON
Section 6-T-4, Page 13 of 13
Revision 3.21 (12/10/07)
© 2006 Zenith Aircraft Co.
IMPORTANT: When pulling rivets, keep the riveter square (perpendicular) to
the work piece.
A4 Rivet (Avex blind rivet)
Set the rivet head on the front side of the spar (it is also acceptable to have
rivets pull from the back side) Tip rib; rivet head is set on the top side
(outside).
The Rudder Skeleton
(left)
Note: at the factory
workshops held by
Zenith Aircraft Co. the
parts have already been
primed for corrosion
protection.
CHECK: No gap should
exist between edge of
rivet head and sheet-
metal.

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6 t-4 cnc rudder

  • 1. ZODIAC 601 XL Zenith Aircraft Company www.zenithair.com RUDDER SKELETON Section 6-T-4, Page 1 of 13 Revision 3.21 (12/10/07) © 2006 Zenith Aircraft Co. Kit parts that make up the rudder skeleton. ZODIAC CH 601 Series Parts are labeled for easy identification with a part number and description: Part number example: 6T4-4 Vertical Tail Spar 6 - Zodiac CH 601 model T - Rudder section of the Aircraft drawings. 4 - Page 4 of the Rudder drawings. 4 - Part 4 on page 4. In addition to this photo assembly guide, also refer to drawings 6-T-4 and 6-T-5 for technical information. Exploded view of the rudder assembly This manual has been prepared for assembly of the Rudder Starter Kit supplied with the predrilled Rudder Spar and Rear Skin, (starting Nov. 2006). Previous versions did not include the predrilled Rudder Spar or Rear Skin.
  • 2. ZODIAC 601 XL Zenith Aircraft Company www.zenithair.com RUDDER SKELETON Section 6-T-4, Page 2 of 13 Revision 3.21 (12/10/07) © 2006 Zenith Aircraft Co. Mark the bottom side corner on the side flange of the doubler. Measure 10mm from the end and mark a line to the bottom corner. 6T4-5 Doubler Angle Note: The spar flange should not be flush with the edge of the doubler. Do not use a scribe or a pencil to mark. Trim the bottom corners of the doubler angle. It is a good idea to practice on piece of scrap material to get a feel for the snips first. To choose between the red or green snips: The bottom jaw is positioned under the cutoff piece. The bottom jaw will cause the material to curl, let this happen to the piece that is removed. Left Photo: Green handled snips.
  • 3. ZODIAC 601 XL Zenith Aircraft Company www.zenithair.com RUDDER SKELETON Section 6-T-4, Page 3 of 13 Revision 3.21 (12/10/07) © 2006 Zenith Aircraft Co. Measure up 30mm from the bottom of the doubler and mark a reference line along the edge of the doubler. Handi-Clamp P/N: TP640HC The doublers extend 30mm past the bottom of the Spar. Raised above the workbench and to provide solid backing when drilling). Install a rubber stop on the drill bit. (small piece of rubber hose sliced in half)
  • 4. ZODIAC 601 XL Zenith Aircraft Company www.zenithair.com RUDDER SKELETON Section 6-T-4, Page 4 of 13 Revision 3.21 (12/10/07) © 2006 Zenith Aircraft Co. Drill and cleco every other hole. Finish drilling without adding more clecos. Edge Distance = e This is the distance from the center of a hole to the edge of the material. In general e = 3 X D D is the diameter of the hole. For the A4 and A5 rivets e = 10mm Drill Sizes: A3 rivet/pilot hole: #40 A4 rivet: #30 A5 rivet: #20 Mark a line 20mm from the top edge of the bottom flange. Slide the rib flange between the doublers and the spar. Bottom rib 6T4-6
  • 5. ZODIAC 601 XL Zenith Aircraft Company www.zenithair.com RUDDER SKELETON Section 6-T-4, Page 5 of 13 Revision 3.21 (12/10/07) © 2006 Zenith Aircraft Co. Line up the bottom of the spar on the 20mm line. Reinstall the bottom clecos in the spar. CLAMP the bottom of the doublers to the side flange of the rib. Drill and cleco. Add a hole 10mm up from the bottom of the DOUBLER (through the rib flange). When drilling be careful not to drill through and hit the rib web on the other side.
  • 6. ZODIAC 601 XL Zenith Aircraft Company www.zenithair.com RUDDER SKELETON Section 6-T-4, Page 6 of 13 Revision 3.21 (12/10/07) © 2006 Zenith Aircraft Co. EDGE MARKER BLOCK: P/N: 6352 Tighten the screw on the gauge arm when the marker is on the reference line. Pull the marker to strike a line. First mark a reference line along the edge of a practice piece of material. Edge distance = 9mm Mark the flange rivet line on all 3 flanges: front and sides. Rear ribs 2, 3, 4 and on the nose rib. Free hand method: use your finger as a gauge to hold the marker equal distance to the edge.
  • 7. ZODIAC 601 XL Zenith Aircraft Company www.zenithair.com RUDDER SKELETON Section 6-T-4, Page 7 of 13 Revision 3.21 (12/10/07) © 2006 Zenith Aircraft Co. Position the rib on the back side of the spar. The pre-drilled holes in the spar web are measured from the bottom end of the doublers. Refer to drawing 6-T-5 for the rib locations. Adjust the position of the rib until the rivet line on the rib flange is visible through the pre-drilled holes in the spar. Clamp the rib to the spar. Use the toggle clamps.
  • 8. ZODIAC 601 XL Zenith Aircraft Company www.zenithair.com RUDDER SKELETON Section 6-T-4, Page 8 of 13 Revision 3.21 (12/10/07) © 2006 Zenith Aircraft Co. Position the spar on its side (raised on 2x4 blocks to keep the clamps off the workbench). Drill and cleco the two middle holes. Remove the clamps and drill the two outer holes. View of rib flange. Drill and Cleco rear ribs 3 and 4. Rear rib #3, the spar flange points down, the side flanges point up. Refer to drawing 6-T-5 for the orientation. The hidden line (dash line) represents the web (flat section of rib).
  • 9. ZODIAC 601 XL Zenith Aircraft Company www.zenithair.com RUDDER SKELETON Section 6-T-4, Page 9 of 13 Revision 3.21 (12/10/07) © 2006 Zenith Aircraft Co. 6T4-1 Nose Rib To center the nose rib on spar: Clamp the extrusions to the rib flange. (On the clamp, push the handle forwards). EXTRUSIONS. Upper bearing 6T4-3 Qty: 2 ORIENTATION: flange points down. Squeeze the ends of the extrusions together to center the rib on the spar.
  • 10. ZODIAC 601 XL Zenith Aircraft Company www.zenithair.com RUDDER SKELETON Section 6-T-4, Page 10 of 13 Revision 3.21 (12/10/07) © 2006 Zenith Aircraft Co. Check the rivet line on the rib flange is visible through the pilot holes. Clamp the rib to the spar. Remove rib #3 to drill the nose rib. 6T4-1 Drill and Cleco the nose rib to the spar. Re-install RR#3
  • 11. ZODIAC 601 XL Zenith Aircraft Company www.zenithair.com RUDDER SKELETON Section 6-T-4, Page 11 of 13 Revision 3.21 (12/10/07) © 2006 Zenith Aircraft Co. Check: Center the bent strip on the spar. Clamp the Bent Strip to the spar when the line is visible through the predrilled holes in the Spar. Back Drill through the spar into the bent strip. BENT STRIP 6T5-5 Mark a line 10mm from the bottom edge. Remove the bent strip from the spar to drill the Tip Rib: Drill 2 holes in the bent strip. First mark the rivet line 9mm from the aft edge, then come in 9mm from the ends. Position the Bent Strip on the Tip Rib so the line is visible through the holes in the Bent Strip. Drill and cleco the Bent Strip to the Tip Rib. 9mm edge distance. TIP RIB 6T4-2 Mark a line at 60mm from the front of the rib.
  • 12. ZODIAC 601 XL Zenith Aircraft Company www.zenithair.com RUDDER SKELETON Section 6-T-4, Page 12 of 13 Revision 3.21 (12/10/07) © 2006 Zenith Aircraft Co. Deburr the holes and rough edges, file and radius any sharp corners. Cleco the Doublers and Ribs to the Spar. Burs in aluminum are very small; most can be knocked off with a flat file: lay the file flat on the rivet line and push it forwards. An alternative method is to use a large drill bit, and to give each hole a quarter turn. Remember to deburr both sides of every hole. The diameter of the machined nose piece on the riveter is the same diameter as the rivet head. Differently sized nose pieces are required for the A4 and A5 rivets – don’t pull A4 rivets with the A5 nose piece. Special machined riveter nose piece Hand riveter
  • 13. ZODIAC 601 XL Zenith Aircraft Company www.zenithair.com RUDDER SKELETON Section 6-T-4, Page 13 of 13 Revision 3.21 (12/10/07) © 2006 Zenith Aircraft Co. IMPORTANT: When pulling rivets, keep the riveter square (perpendicular) to the work piece. A4 Rivet (Avex blind rivet) Set the rivet head on the front side of the spar (it is also acceptable to have rivets pull from the back side) Tip rib; rivet head is set on the top side (outside). The Rudder Skeleton (left) Note: at the factory workshops held by Zenith Aircraft Co. the parts have already been primed for corrosion protection. CHECK: No gap should exist between edge of rivet head and sheet- metal.