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21) Secure your receiver on the front of the plywood radio

tray with one of the plastic cinch straps provided.  It’s best to
use a piece of foam rubber between the receiver and the ply-
wood.    Also,  don’t  tighten  the  cinch  strap  too  snug  -  just
enough to keep the receiver in place.

NOTE:

If you are not using BEC, but are instead using a sep-

arate receiver battery, you can mount your on/off switch in the
pre-cut hole in the fuselage side.  You will need to open up the
covering where the hole is cut in the wood.

ELEVATOR & RUDDER PUSHROD INSTALLATION

For this section you will need:

(1) Fuselage
(2) Long Pushrod Wires with M2 Hex Nut
(2) Metal R/C Clevis
(2) Nylon Snap Keepers
(2) Small Pieces of Fuel Tubing

22) Assemble and install the elevator pushrod.

a) First  slide  a  small  piece  of  Fuel Tubing  onto  the  small

end of the Metal R/C Clevis.  Next, screw the Hex Nut that is
on the Pushrod Wire all the way up to the end of the threads.
Then screw the metal clevis halfway onto the threads (same as
you did back in Step 4a on page 6).

b) Locate the pre-cut pushrod exit hole for the elevator on

the right side of the fuselage at the back of the plane.  Slide the 
pushrod into the exit hole and inside the pushrod sleeve built
into the fuselage.  Slide it in until you can clip the clevis into the
middle  hole  of  the  control  horn.    Lock  the  elevator  in  neutral
position  with  tape  or  with  two  small  balsa  wood  sticks  held
together with small rubber bands.

c) Inside the fuselage, hold the pushrod wire over the ele-

vator  servo  output  arm  and  mark  the  wire  where  it  crosses
over the outer hole in the servo arm.

d) At the tail end, unlock the elevator from neutral position,

and then unclip the clevis from the control horn. Remove the
clevis  and  the  hex  nut  completely  off  of  the  pushrod  and  set
them aside.  Now pull the pushrod out of the fuselage from the
servo  end.    It  will  be  easier  to  complete  the  next  three  steps
with the pushrod out of the airplane.

e) Cut off the pushrod wire 1/4" past the mark made at the

servo end in step c).  Then put a sharp 90-degree bend in the
wire at the mark.

f) Remove the servo arm from the elevator servo.  Drill out

the  last  hole  in  the  servo  arm  with  a  1/16"  dia.  drill  so  it  will
accept  the  pushrod  wire.    Then  insert  the  bent  end  of  the
pushrod wire into the servo arm, from the top.

g) Clip a Nylon Snap Keeper in place to hold the pushrod

wire in the servo arm.  Snap the free end of the keeper up and
over  the  protruding  end  of  the  pushrod  wire,  underneath  the
servo arm.

h) Now slide the pushrod back inside the pushrod sleeve

in the fuselage, from the front.  When it is in far enough, put the
servo arm back in place on the servo.

i) Make sure that the elevator servo is in neutral position

and  then  adjust  the  metal  clevis  at  the  tail  end  as  needed  to
get the elevator in perfect neutral position.

j) After  the  elevator  is  properly  adjusted,  insure  that  the

metal  clevis  can’t  open  up  and  come  loose  from  the  control
horn by sliding the small piece of fuel tubing over the arms of
the clevis.  Also tighten the M2 Hex Nut up against the back of
the clevis.

23) Locate the pre-cut pushrod exit hole for the rudder on

the left side of the fuselage at the back of the plane and repeat
step (22) in its entirety to install the rudder pushrod.

ELECTRIC MOTOR & ESC INSTALLATION

For this section you will need:

(1) Fuselage 
(1) Plastic Canopy cover
(1) Wooden canopy hatch frame
(1) Balsa Triangle Stock
(4) M4 x 16mm Socket-Head Bolts

9

Summary of Contents for SBACH XA-41 EP ARF

Page 1: ...Loading 19 6 21 9 oz sq ft 60 67 g dm2 Just add your own radio and electric power system Radio Req 4 Channel with 4 Micro Servos Electric Power 32 Class Brushless Motor 700 900 kv 600 800 watts 60 75A Speed Control ESC 4S 2500 4000 mAh Lipo Battery Pack SIG MFG CO INC PO Box 520 Montezuma IA 50171 0520 www sigmfg com Copyright 2013 SIG Mfg Co Inc KIT NO SIGRC105EPARF ...

Page 2: ...ions EDGE LITE 75 ESC in all our Sbach XA 41 prototypes This is an excellent switching type ESC that has a built in 5 amp BEC that is safe to use with a 4 cell lipo battery pack Important Note BEC Battery Eliminator Circuit allows you to use the same battery pack to power both your motor and your radio system eliminating the normal radio battery pack When the single battery pack runs down in fligh...

Page 3: ...glued 1 Left Wing Panel Aileron hinges not glued 1 Aluminum Tube Wing Joiner 2 M6 5 x 45 mm nylon wing bolts with T Head 1 Horizontal Stabilizer Elevator hinges not glued 1 Vertical Fin Rudder hinges not glued 1 Fiberglass Cowling 4 M3 x 10mm Screws for cowl mounting 1 Aluminum Right Main Landing Gear 1 Aluminum Left Main Landing Gear 3 M4 x 20mm Socket Head Bolts for mounting landing gear 2 2 1 8...

Page 4: ...et the expanding air escape and the covering to shrink properly Note that the black checkerboard sections of the model are done with adhesive backed vinyl and care should be taken when shrinking covering around them The vinyl will shrink and melt with too much heat A heat gun is preferred for these areas of the Sbach Caution When Using Heat Guns You can also use a hobby type heat gun to shrink the...

Page 5: ...ing to push it straight onto all the hinges at once c Adjust the aileron so that the tip of the aileron is flush with the wing tip The ailerons should be tight against the pins in the hinges to minimize the gap between the wing and the aileron The aileron is now in the proper position for perma nently gluing them in place with thin CA glue d Flex the aileron down and hold it in this position Remov...

Page 6: ... and come loose from the control horn by sliding the piece of Fuel Tubing over the arms of the clevis Also tighten the M2 Hex Nut up against the back of the clevis FUSELAGE ASSEMBLY INSTALL THE MAIN LANDING GEAR Locate the following parts from the kit contents 1 Fuselage 2 Aluminum Main Landing Gear 4 M4 x 20mm Socket Head Bolts 4 M4 Split Ring Lock Washers 2 2 1 4 dia Main Wheels 2 4mm dia Thread...

Page 7: ...manual Let the hinges dry adequately before proceeding 12 Look closely and you will see three holes pre drilled in one of the elevators for mounting a nylon control horn Screw the control horn in position on the bottom of the right elevator using three M2 x 12mm screws When the tips of the screws begin to emerge at the top surface of the elevator add the con trol horn s nylon retaining plate Conti...

Page 8: ...o remove the screws and reinforce the threads into the wood with some thin CA Then reinstall the control horn and the screws TAILWHEEL INSTALLATION 19 Locate the Tailwheel assembly and the nylon bearing a Temporarily mount the Tailwheel assembly in place on the lower rear end of the fuselage using two M3 x 12mm screws Note that there are two pilot holes already in the fuse lage for the screws b Ad...

Page 9: ...ck the elevator from neutral position and then unclip the clevis from the control horn Remove the clevis and the hex nut completely off of the pushrod and set them aside Now pull the pushrod out of the fuselage from the servo end It will be easier to complete the next three steps with the pushrod out of the airplane e Cut off the pushrod wire 1 4 past the mark made at the servo end in step c Then ...

Page 10: ... adjustment slots on both sides of the box four marks total c After you have all four slots marked carefully align the front face of the firewall to line up with the marks Make sure you end up with the firewall straight and square in the box If it is not recheck your marks and adjust as necessary d Tack glue the firewall in place Recheck once more to make sure that the front of the firewall is at ...

Page 11: ...e it to the tray 31 Attach the canopy to the Fuselage Top Hatch a Locate the plastic canopy and the covered wooden Fuselage Top Hatch Test fit the canopy on the hatch Allow the canopy to overhang the rear of the hatch by 1 8 to 1 4 b Permanently glue the canopy on to the hatch with a flexible RC 56 type glue not supplied Place a narrow bead of glue all around the edge of the canopy where it will m...

Page 12: ...nd precision pattern flying Note Measurements are aft of the leading edge of the wing at the fuselage sides DISTANCE MAC 3 24 32 3 44 34 3 65 36 If you are unsure where to start a balance point approximately 3 aft of the leading edge is a safe bet for initial test flights After test flying you can adjust the balance point to fit your flying style Remember it has been said that a nose heavy model m...

Page 13: ...he airplane making sure the surfaces are moving in the correct directions Also check each control linkage to be sure they are secure and that nothing is loose With all the controls checked make a range check with your radio system making sure everything is working perfectly For take off the airplane should be lined up with the center of the field with the nose pointed directly into the wind Hold a...

Page 14: ...ovides you with important liability insurance in case your R C model should ever cause serious property damage or personal injury to someone else For more information contact ACADEMY OF MODEL AERONAUTICS 5161 East Memorial Drive Muncie IN 47302 Telephone 765 287 1256 AMA WEB SITE modelaircraft org CUSTOMER SERVICE SIG MFG CO INC is committed to your success in both assembling and flying the SBACH ...

Page 15: ...15 SBACH XA 41 LOG BOOK Date of first flight ...

Page 16: ...rom the fuselage start by first sliding the hatch forward about 1 4 to disengage the magnets and the rear tabs from the fuselage Then lift up on the back end of the hatch Pull the hatch up and back to disen gage the front pins and lift the hatch off of the fuselage Copyright 2013 SIG MFG CO INC SIG MFG CO INC 401 S Front St Montezuma Iowa 50171 U S A Printed in Vietnam ...

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