SIG KADET EP-42B Assembly Manual Download Page 2

using the directions in this assembly manual.

ESC  ELECTRONIC  SPEED  CONTROL  (supplied):

An  18  amp

Brushless type Electronic Speed Control is included.  This ESC is
completely  factory  wired  with  exception  of  the  battery  connector
leads.

PROPELLER  (supplied):

A  SIG  8-1/2  x  8  EP  propeller  is 

furnished  with  this  model.   This  propeller  provides  excellent  flight
performance throughout the model's flight envelope.

BATTERY  PACK  (not  supplied):

The  included  motor/ESC 

combination  is  designed  to  use  3-cell  Lithium  Polymer  (LiPo) 
battery packs in the 900 - 1400 mAh capacities.  Properly charged,
these  packs  deliver  excellent  power  and  duration  for  the  KADET
EP-42B.

NOTE:

Be aware that as battery pack sizes go up in capacity, so

does their weight.  In turn, this can effect the recommended Center
of Gravity location for this model.  Use the pack size and capacity
that  best  suits  the  model  in  terms  of  the  C.G.  location.    See  the
"Balance Your Airplane" section of this manual for more details.

BATTERY CHARGER (not supplied):  FOR MAXIMUM SAFETY
AND  PERFORMANCE,  YOU  MUST  ONLY  USE  A  BATTERY
CHARGER  DESIGNED  SPECIFICALLY  FOR  CHARGING 
LITHIUM POLYMER BATTERIES!

Most modern Lithium Polymer battery chargers additionally include
the  capability  of  "balancing"  the  available  voltage  from  the  cells,
ensuring that the battery pack is at peak capacity at the end of the
charge cycle.  This translates to better flight times and a longer life
from the battery pack.

RADIO EQUIPMENT:

The  KADET  EP-42B  gets  its  great  flight  performance  from  many
factors, but two of the most important factors are its lightweight and
generous wing area.  The lighter the final weight is, the better this
airplane will fly!  Since this model is factory built and covered, you
can  only  realistically  control  the  finished,  ready-to-fly  weight  by
choosing the most appropriate radio equipment for a model of this
size.  In short, the flight performance of your KADET EP-42B will
be  directly  controlled  by  the  weight  of  the  radio  equipment  you
choose to put in it.  Maximum performance can only be achieved
with lightweight components.

RECEIVER:

A small or "micro" size receiver should be used in this

model due to weight and size constraints.  In our flight tests of the
KADET  EP-42B,  we  have  used  the  following  dual  conversion
receivers:

Receiver

Weight

FMA M5

11 grams

Hitec Electron 6

19 grams

NOTE:

Single conversion receivers can also be used as long as you

are aware of the potential for interference from other transmitters.

SERVOS:

Standard  servos,  the  ones  that  come  with  most  sport

radio systems, are too big and too heavy for the KADET EP-42B.
You  will  need  smaller  servos.    In  our  flight  tests  of  the  KADET 
EP-42B, we have used the following servos:

Servo

Weight

Torque

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.

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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 that time, thousands upon thousands of
student  pilots  have  successfully  learned  to  fly  R/C  with  a  SIG
KADET.    Even  expert  pilots  enjoy  flying  a  SIG  KADET  now  and
then for an easygoing change of pace.  Flying low and slow on a
dead  calm  summer  evening  provides  a  satisfaction  that  can't  be
matched with other types of models.

The KADET EP-42B represents a major milestone in the history of
SIG KADETS.  This is the first ever electric powered SIG KADET
kit!   This  blending  of  the  legendary  KADET  flying  characteristics
with  a  state-of-the-art  brushless  electric  power  system  has 
produced a marvelous little R/C ship, that is a pure joy to fly.  It's
small  enough  to  carry  around  in  your  vehicle  completely 
assembled  and  ready  to  fly  almost  anywhere,  anytime!    Unlike
most other small electric powered models, the KADET EP-42B has
a light wing loading - light enough to make you forget that you are
flying an electric airplane.  That overweight, heavy, afraid-to-slow-
it-down  feeling  you  may  have  experienced  with  other  electric 
airplanes is gone!

Assembly  of  your  SIG  KADET  EP-42B  ARF  is  fast  and  simple
when following the detailed instructions in this manual.  A low parts
count  and  professional  engineering  ensure  quick  and  easy 
assembly.  All parts are CAD-drawn, laser-cut, and jig assembled,
which means that everything fits the way it should!  We urge you to
read this instruction manual completely before starting assembly,
to familiarize yourself with the parts and the assembly sequence.

AN IMPORTANT NOTE ABOUT LEARNING TO FLY R/C

The KADET EP-42B ARF is certainly a suitable model for learning
to fly R/C.  However, it is important to understand that if you have
never flown an R/C airplane before, you will need to find and use a
qualified R/C flight instructor.  The instructor should make the first
test  flight  of  the  new  airplane,  to  make  sure  it  "trims  out"  to  fly 
properly.    After  that,  he  can  teach  you  how  to  fly  the  airplane.
Without an instructor, your chance of a successful first R/C flight is
less than 1 in 1000.  You will most likely crash and destroy your new
airplane!  With a qualified instructor, your chance of learning to fly
R/C  is  nearly  100%.    So,  if  this  is  your  first  radio  control  model 
airplane, DO NOT attempt to fly it without a qualified instructor.  It's
the  fastest,  most  efficient  way  to  become  a  good  R/C  pilot.    And
you'll make a new R/C flying buddy.

ELECTRIC POWER SYSTEM:
MOTOR (supplied):

Your KADET EP-42B comes with a powerful

90-watt  brushless  motor,  ready  to  easily  and  quickly  install 

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...

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