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CN4004 Sea King Scale Fuselage Manual

Warning

The Sea King fuselage is designed to use Century’s flexible cable drive system, this requires that the mechanics
installed use a wire drive tail shaft or can be modified from a shaft or torque tube drive system. A belt drive

A belt drive

A belt drive

A belt drive

A belt drive

system is not compatible.

system is not compatible.

system is not compatible.

system is not compatible.

system is not compatible.  Consideration also must be taken when choosing a gyro as the demand from the cable
drive system will require a lower gain setting and the heading hold gyro is generally not recommended from the
high stress imposed on the tail.  A good rate gyro will work very well.

In order to use the Retract system included in this instruction, it is assumed that the mechanics to be installed is
of the rear facing engine design

rear facing engine design

rear facing engine design

rear facing engine design

rear facing engine design.(all X-Cell 60,ST,CT & SE)  If it is preferred to install a mechanics using a

forward facing engine, then additional modifications will be necessary for the Retracts to operate.

It is worth while mentioning at this time that if the scale multi main and tail rotor systems will be used that it is
best to install the lowest gear ratio available for the chosen mechanics.  Lowest referring to the engine to main
shaft gear ratio that turns the main rotor disk the slowest (usually the main gear has the largest number of teeth)
to maximize engine torque to drive the 5 blade main rotor system.  It is also important to understand that the
main rotor RPM range should fall in the 900-1200 range due to the increased number of rotor blades on the main
head and the tail rotor.

Congratulations  on  purchasing  Century’s  magnificent  scale  fuselage  of  the  Sea  King.

Congratulations  on  purchasing  Century’s  magnificent  scale  fuselage  of  the  Sea  King.

Congratulations  on  purchasing  Century’s  magnificent  scale  fuselage  of  the  Sea  King.

Congratulations  on  purchasing  Century’s  magnificent  scale  fuselage  of  the  Sea  King.

Congratulations  on  purchasing  Century’s  magnificent  scale  fuselage  of  the  Sea  King.    The  fuselage  is
manufactured from lightweight fiberglass using Epoxy resin with carbon fiber filament reinforcement at seams
for extra strength.  The fuselage has a pre-primed surface and has the major open sections precut for conve-
nience.  All wooden parts are precut and labeled for easy identification.  Semi-scale Retractable landing gear and
wheels add that little extra that has made Century famous for their quality fiberglass scale fuselages.
This instruction set is to aid the modeler in the construction of their fuselage, however, due to the large number of
helicopter mechanics available on the market, this instruction will only detail the general case. In many instances,
additional modifications will be necessary to adapt to your helicopter.

                  Fiberglass main body parts                                        Pre-cut wood parts                          Clear windshield

Section One: Tail Drive & Installation

Step  1.  Insert  the  flexible  cable  into  the  brass  tube

Step  1.  Insert  the  flexible  cable  into  the  brass  tube

Step  1.  Insert  the  flexible  cable  into  the  brass  tube

Step  1.  Insert  the  flexible  cable  into  the  brass  tube

Step  1.  Insert  the  flexible  cable  into  the  brass  tube
Insert the flexible cable into the brass tube (to keep the
bend smooth, without kinks) and tape off at one end.
Slowly bend the long brass tube, make the bends gradual
in intervals using your hands.  Do not cut the length of
the brass housing at this time, this will be done near the
very end of installing the flexible cable drive system. See Fg.1

Step 2. Locate F15 and F16

Step 2. Locate F15 and F16

Step 2. Locate F15 and F16

Step 2. Locate F15 and F16

Step 2. Locate F15 and F16
Locate F15 and F16, these formers (photo #1) are for mounting the tail gearbox to the elevated tail section.  The
F16 former will be glued to the F15 former with the offset notch to the front part of the F15 former.  The basic

Fg.1

Fg.1

Fg.1

Fg.1

Fg.1

Summary of Contents for Sikorsky S-61 Sea King

Page 1: ...t Designed and Developed in the USA Sept 2002All rights reserved SEA KING SPECIFICATIONS Century Helicopter Products Century has designed a new Sikorsky S 61 Sea King Changes to full size helicopter designs are a direct challenge to the modeler To its predecessor the Century model Sea King fuselage has many tiny detailstocatchyoureye andmajordetailfeaturesmakeatremen dous difference to the overall...

Page 2: ...ea King Congratulations on purchasing Century s magnificent scale fuselage of the Sea King Congratulations on purchasing Century s magnificent scale fuselage of the Sea King Congratulations on purchasing Century s magnificent scale fuselage of the Sea King The fuselage is manufactured from lightweight fiberglass using Epoxy resin with carbon fiber filament reinforcement at seams for extra strength...

Page 3: ...cated 30mm from the end of the gearbox Using a razor saw very thin saw blade cut flush to this wall completely through the right gearbox half Now the tail gearbox is in three parts Remove the lower right half with the vertical fin mounts this part is no longer used Initially assemble the F16 and F15 formers do not use glue at this step and install the tail gear box assembly onto the F16 former Pos...

Page 4: ...d former forcing any excess glue to the edges Repeat process for all holes Using a saw or moto tool grind vertical slots in the edge of the former spaced 1 8 apart Measure and mark the inside wall where the final position of the top surface of the former will be Once ready use a Q tip or applicator and apply Stabilit or Epoxy above the mark on the inside of the fiberglass and to the outside edge o...

Page 5: ...Using 1 8 plywood not included cut out these formers to a height of 1 4 1 2 above the top of the pushrod from the plan These need not be the full width of the inside of the fuselage but can be 1 1 4 wide using a triangular reinforcement to add stability when bonded in place Mark and drill the hole for the rudder pushrod Stop here and decide the location of the rudder servo Once this is finalized p...

Page 6: ...nother tail gearbox assembly is being installed If another tail gearbox assembly is being installed If another tail gearbox assembly is being installed If another tail gearbox assembly is being installed read the previous step to become familiar with the process before finalpositioningandpermanentlybondingtheformersinplace Step 18 Step 18 Step 18 Step 18 Step 18 Using a ruler estimate the center o...

Page 7: ...ep 23b Step 23b NOTE NOTE NOTE NOTE NOTE To make sure that your chosen mechanics will be supported inside the fuselage the F1 Floor former photo 4 has the key tabs cut but the two F3 rail formers have not had the notches cut from their bottom edge to match Once you have followed these instructions and marked the location of your mechanics in the assembly you will then mark and cut out the notches ...

Page 8: ...etract axle At this point inspect the front and rear fit of the former to the fuselage some sanding may be required to get a good fit at the seam of the fuselage down the center and at the sides Once satisfied with the fit slide the main section of the mechanics without tail boom assembly or main shaft and position the two F2 hardwood landing gear rails underneath the mechanics with the taper towa...

Page 9: ...ne Step 25 Step 25 Step 25 Step 25 Step 25 Test fit the horizontal fin to the top of the elevated tail section some sanding may be necessary to get a perfect fit with the fin overlapping the boss on the fuselage Using Stabilit or Epoxy bond the horizontal fin in place using tape to keep the fin square to the tail 90 degrees Once completely dry using additional Stabilit or Epoxy mixed with Mi cro b...

Page 10: ...w painting without disturbing the bonding surface Step 30 Step 30 Step 30 Step 30 Step 30 There are 24 pieces of 3 8 square plywood screw mounts and 24 M3x8 self tapping screws These are to attach the front fuselage section the top hatch and the tail cover to the main fuselage body There is no set rule for using all of these pieces to attach the hatches Start by taping the front fuselage section a...

Page 11: ... the side view for proper alignment blocks of various sizes can be used to hold the tail section until cured Secure both the main fuselage and the tail assembly in place using long strips of masking tape Make adjustments as necessary to get the perfect alignment Step 35 Step 35 Step 35 Step 35 Step 35 Insertthetailcouplerontothetailtransmissionoutputshaftonthemechanics Markandgrindtheappropriatefl...

Page 12: ... Step 39 Step 39 Step 39 Step 39 To prepare the dome depending on the version of the SeaKing that is being built remove the gelcoat surface from the rounded keys The dome is to be mounted on the tail section just past the joint between the tail and the main mechanics Once located mark and sand through the gelcoat surface for bonding after the fuselage has been painted Step 40 Step 40 Step 40 Step ...

Page 13: ...wed by one 5 32 wheel collar and use threadlock on the securing set screws The goal is to have the wheel spin freely but without any lateral movement on the axle Slide one 1 1 4 wheel onto the tail gear wire and secure with one 1 8 wheel collar using threadlock Remove the Socket Head Cap Screw that will secure the wire landing gear onto the axle and position and tape the sponson in position and in...

Page 14: ...ing on Sunday is dreaming the helicopter would be flyable but even that is a stretch The average modeler will spend the better part of a month to apply a good clean paint job Preparing the fuselage for painting Preparing the fuselage for painting Preparing the fuselage for painting Preparing the fuselage for painting Preparing the fuselage for painting After opening the fuselage examine all the fi...

Page 15: ...at extends below the bottom of the fuselage After drawing the circle use grinding stone and move in small circles until the hole is at the size wanted Step 50 Step 50 Step 50 Step 50 Step 50 Priming the fuselage accomplishes two tasks firstly the primer paint is designed to aggressively adhere to the surface being painted and provide the best surface for the colored paint to adhere to secondly all...

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