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SIG KADET EP-42B, Assembly Manual, Page: 3 / 16

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SIG KADET EP-42B Assembly Manual Download Page 3

SERVO CHORDS:  

You will need one Y-Harness Chord to connect

the  two  aileron  servos  together.   This  allows  you  to  operate  both
aileron servos off of one receiver lead.  Every radio manufacturer
has  Y-Harness  Chords  available  for  their  radio  systems.    Also,
depending  on  exactly  how  long  the  wires  are  on  your  aileron 
servos, you will most likely need two 6" Servo Extension Chords to
give you enough wire length to run through the wing.

NOTE:

In  our  prototype  installations,  we  leave  the  single  end  of

the  Y-harness  plugged  into  the  receiver  permanently,  and  then,
unplug the two aileron servo extension chords from the Y-harness
when we remove the wing from the airplane.

COVERING MATERIAL:

Your  KADET  EP-42B  is  covered  with  ORACOVER

®

,  a  premium

quality covering made in Germany, and sold in the U.S. by Hanger-9
as Ultracote

®

.

Colors Used On Your Airplane

ORACOVER

®

#10 White (Ultracote #HANU870) and

ORACOVER

®

#29 Transparent Red (Ultracote #HANU950)

or

ORACOVER

®

#59 Transparent Blue (Ultracote #HANU954) 

Wrinkles!

After  you  remove  the  covered  model  parts  from  their

plastic bags, you may notice within the first couple days that some
of the covering material may become slack or wrinkled.  If that's the
case,  there  is  no  need  to  be  alarmed.    The  covering  is  not 
defective!  Your KADET EP-42B was covered in a part of the world
that  has  consistently  high  humidity,  and  some  of  that  moisture  is
retained  in  the  balsa  wood  when  the  parts  were  put  in  the  bags.
When  exposed  to  drier  air,  the  wood  loses  the  excess  moisture,
dimensionally  shrinking  slightly  in  the  process.  This  may  cause
some slight relaxing of the covering, causing wrinkles to appear.

Any  wrinkles  that  appear  in  the  covering  are  easy  to  remove  by
applying a little heat from a small modeler's heat iron.  Because of
this model's small size, we do not recommend using a heat gun to
tighten up loose covering.  A typical hobby type covering iron will
work  just  fine.    Even  better  is  a  small  modeler's  "trim  seal"  iron,
which is perfect for controlling the heat applied to a specific area.
Using a small trim iron also minimizes the possibility of warping the
thin control surface parts.

Recommended Temperatures:

To adhere the covering - 220

O

F - 250

O

F (104

O

C - 121

O

C) 

To shrink the covering  - 300

O

F - 320

O

F (149

O

C - 160

O

C)

First, use the hot iron to go over all the seams and color joints in
the  covering,  making  sure  they  are  all  sealed  down  and  well
adhered.  Then, hold the hot iron over the wrinkle to lightly shrink
the material - do not press on it.  Once the covering is tight, lightly
iron it back down to the wood.  Use caution whenever the hot iron
gets  close  to  a  seam  in  the  covering.    Over-heating  a  seam  can
cause the covering to creep, exposing the wood underneath.  Also,
be careful when working around the windshield and side windows 

- too much heat will distort this clear plastic material.

REQUIRED TOOLS:

For proper assembly, we suggest you have the following tools and
materials available:

❑

A selection of glues - thin, medium, and thick SIG CA, and

SIG Epoxy Glue (

5-minute and 30-minute

)

❑

Fine point CA applicator tips

❑

Screwdrivers

❑

Pliers - Needle Nose and Flat Nose

❑

Wire Cutters

❑

Soldering Iron & Flux

❑

Drill with Assorted Drill Bits

❑

1.5 mm Hex Wrench or Ball Driver

❑

Pin Vise for small diameter drill bits 

❑

Small T-Pins

❑

Sandpaper

❑

Hobby Knife with sharp #11 blades

❑

Scissors

❑

Covering Iron and Trim Seal Tool

❑

Paper Towels

❑

Rubbing Alcohol (for cleaning off excess epoxy glue)

KIT INVENTORY:

The  following  is  a  complete  list  of  all  parts  contained  in  this  kit.
Before beginning assembly, we suggest that you take the time to
inventory the parts in your kit.

1 bag

❑

(1) Fuselage, with

Electric Motor installed
Molded Plastic Cowling installed
Clear Plastic Windshield installed
Clear Plastic Side Windows installed

1 bag

❑

(1) Right Wing Panel

❑

(1) Right Aileron with 3 CA Hinges, installed but not glued

1 bag

❑

(1) Left Wing Panel

Left Aileron with 3 CA Hinges, installed but not glued

1 bag

❑

(1) Fin & Rudder with 3 CA Hinges, installed but not glued

1 bag

❑

(1) Stabilizer & Elevator with 4 CA Hinges, installed 

but not glued

1 bag

❑

(1) Aluminum Main Landing Gear

❑

(2) Main Wheels

❑

(2) M3 x 20 mm Axle Bolts

❑

(2) M3 Hex Nuts

❑

(2) M3 Lock Nuts

❑

(2) M2.6 x 10 mm Screws

1 bag

❑

(2) Aileron Pushrod Wires (short)

❑

(1) Elevator Pushrod Wire (long)

❑

(1) Rudder Pushrod Wire (long)

1 bag

❑

(2) 4-40 x 1" Nylon Wing Bolts

❑

(4) Nylon Control Horns

❑

(4) Nylon Pushrod Keepers

3

Summary of Contents for KADET EP-42B

Page 1: ...1 SIG Mfg Co Inc Wingspan 42 in 1067 mm Wing Area 330 sq in 21 3 dm2 Length 34 in 864 mm Flying Weight 24 26 oz 680 737 g Wing Loading 11 7 12 7 oz sq ft 36 39 g dm2 Radio Req 4 Channel Micro Receiver 4 Micro Servos ...

Page 2: ...rque Hitec HS 55 7 9 grams 15 in oz Airtronics 94091 9 0 grams 18 in oz NOTE Any other brand of servo that is in the same size and torque range will also work just fine 2 INTRODUCTION Congratulations on your purchase of the SIG KADET EP 42B The KADET EP 42B is the latest addition to the long line of legendary SIG KADET trainers Did you know that the first SIG KADET was introduced in 1973 Since tha...

Page 3: ... the possibility of warping the thin control surface parts Recommended Temperatures To adhere the covering 220O F 250O F 104O C 121O C To shrink the covering 300O F 320O F 149O C 160O C First use the hot iron to go over all the seams and color joints in the covering making sure they are all sealed down and well adhered Then hold the hot iron over the wrinkle to lightly shrink the material do not p...

Page 4: ...atch of epoxy glue Use a wire or stick to coat the inside of the slot in the end of the left wing panel with glue Also coat the stub of the plywood wing joiner that is sticking out of the right wing panel and the bare wood end ribs of both wing panels Then put the wing panels together Squeeze the panels tightly together aligning the leading and trailing edges of the wing panels with each other Wip...

Page 5: ...y appearance not wet A dry appearance indicates that almost all of the glue has properly soaked into the hinge and wood A wet appearance indicates that excess glue is puddled in the hinge gap Excess glue can become brittle with age and cut the hinge Also NEVER USE CA ACCELERATOR KICKER ON CA HINGES AILERON HOOKUP For this section you will need the assembled wing 2 aileron servos and appropriate ch...

Page 6: ...a pair of pliers to grasp the pushrod wire at the mark just made and then bend the plain end of the wire 90O towards the center of the wing Make the bend as sharp as possible e The excess length of pushrod wire can now be cutoff leaving a 3 16 end leg to pass through the control horn hole Use a good sharp pair of wire cutters to do this Clean off any burs on the end of the wire caused by the cutti...

Page 7: ...stabilizer sits with a sanding block until the stabilizer will sit level c Remove the stabilizer Mix a small amount of epoxy glue and apply it to the mating surfaces of the fuselage and opening in the plywood tray so that the ends of the servo arms line up with the plastic pushrod tubes already installed in the fuselage b Once you have the servos correctly positioned drill small pilot holes throug...

Page 8: ...tabilizer slightly if necessary until both measurements are the same Wipe off any excess glue using a paper towel or rag soaked in rubbing alcohol Allow the glue to dry 16 As received the rudder is only temporarily attached to the fin with 3 unglued CA hinges in the pre cut slots Refer back to page 3 step 4 of this manual for instructions on gluing CA hinges and use the same procedures described t...

Page 9: ... fuselage to make the next step easier to do d Use a pair of pliers to firmly grasp the pushrod wire at the mark just made Look inside the fuselage to make sure that the Z bend end of the pushrod is parallel to the jaws of your pliers What we re getting ready to do is bend the aft end of the pushrod wire 90O SIDEWAYS to the fuselage meaning sideways when the servo arm is re installed on the servo ...

Page 10: ...typically require soldering of these wires and this requires the use of a soldering iron and flux For our ESC and battery connectors we chose to use a Kavan 6321 K 2 connector set These great little connectors are small lightweight and self polarizing a Solder a battery connector to the two black negative and red positive wires on the ESC Solder the corresponding connector to your flight pack batt...

Page 11: ...ction of movement If needed use the servo reversing feature in your transmitter to make the ailerons move in the correct direction b If necessary reposition the aileron servo output arms as close to 90O to the servo case as possible Be sure to reinstall the output arm retaining screws after making the adjustment c With the servo output arms now squared up check the positions of the two ailerons Ad...

Page 12: ... trailing edges MOUNTING THE COWL 35 From the kit contents locate the plastic cowl and the four remaining T2 x 6 mm PWA screws Note that the correct mounting location and position of the cowl is with its forward face approximately 1 4 6 mm behind the front face of the 3 5 mm lock nut and centered with the motor a Slide the cowl in place over the motor and onto the front of the fuselage Use pieces ...

Page 13: ... it might go Some models will try to climb while others may want to go down Some will try to turn left others right Some models will be doing both at the same time It doesn t mean that there is anything wrong with the model but these minor differences must be trimmed out 13 sheet with a sharp 11 hobby knife or a sharp scissors Small decals can be easily applied to the model by simply removing the ...

Page 14: ...s an incorrect control input can produce almost instant problems that in turn demand almost instant correction This is especially true at lower flight altitudes A good flight instructor will climb your model to an altitude that gives him a good chance of saving your airplane when you make these inevitable mistakes This altitude is generally referred to as 2 mistakes high When you get into trouble ...

Page 15: ...h important liability insurance in case your R C model should ever cause serious property damage or personal injury to someone else ACADEMY OF MODEL AERONAUTICS 5161 East Memorial Drive Muncie IN 47302 Telephone 765 287 1256 AMA WEB SITE www modelaircraft org CUSTOMER SERVICE SIG MFG CO INC is committed to your success in both assembling and flying the KADET EP 42B ARF Should you encounter any pro...

Page 16: ......

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