SIG Rascal 72 EG Assembly Manual Download Page 4

❑ 

(8)  Metal R/C Links, for ail(2), elev(2), rud(2), throttle(2)

❑ 

(6)  M2 x 22mm Threaded Studs

❑ 

(2)  3" Aileron Pushrods, threads one end, "Z-bend" other end

Miscellaneous

❑ 

(1)  Aluminum Front Wing Joiner Blade

❑ 

(1)  3/16" dia. x 2-3/8" Steel Rear Wing Locating Pin

❑ 

(1)  Decal Sheet

Fuel Tank for Glow Engine

❑ 

(1)  Fuel Tank Body - 260cc (8.8 oz.)

❑ 

(1)  Rubber Stopper

❑ 

(1)  Metal Front Clamp

❑ 

(1)  Metal Rear Clamp

❑ 

(1)  M3 x 18mm Bolt

❑ 

(1)  Metal Clunk Pick-Up

❑ 

(1)  Fuel Tubing (inside tank)

❑ 

(1)  Aluminum Tube - 3mm od x 60mm

❑ 

(1)  Aluminum Tube - 3mm od x 50mm

❑ 

(1)  Aluminum Tube - 3mm od x 40mm

Engine Mounts for Glow Engine

❑ 

(1)  Right Engine Mount

❑ 

(1)  Left Engine Mount

❑ 

(4)  M3 x 20mm Mounting Bolts

❑ 

(4)  M3 Flat Metal Washers

❑ 

(4)  M3 Blind Nuts

❑ 

(4)  M3 Split-Ring Lock Washers

NOTE:  “PWA Screws” are metal screws with a phillips/washer
style head.

Your RASCAL ARF 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)

If sometime in the future you need replacement covering or
matching paint for repairs, they are available from your local hobby
dealer or online from Hanger-9.

How To Tighten  Loose  Covering

After you open your RASCAL 72 and take all the covered parts
out of their plastic bags, the covering may begin to wrinkle.  This
is not unusual and is no cause for alarm.  

Your airplane was built and covered in a part of the world which
has relatively high humidity and therefore, the wood was likely car-
rying a fair amount of moisture.  When exposed to drier air, the
wood typically loses this moisture, dimensionally "shrinking" in the
process.  In turn, this may cause some wrinkles.  However, wrin-
kles are easy to remove by just using a hobby type heat iron.  Cau-
tion: Trying to remove the wrinkles by hastily going over them with
a heat gun can lead to more problems.  You should take your time
to carefully go over the entire model with a covering iron, as we
will describe.

We suggest  using a model airplane covering iron for this process.
Cover the iron's shoe with a thin cotton cloth, such as an old t-
shirt, to prevent scratching the covering as you work.
After covering your iron, the next step is to set the iron to the cor-
rect temperature.  This is critical for achieving a good result!    The
iron should be set to about 

220

O

F - 250

O

F (104

O

C - 121

O

C)

as

measured on the bottom of the iron using a thermometer.  

If you do not have a thermometer, you can find the correct tem-
perature by trial and error.  Set your iron to a medium setting.
Glide the iron over some of the covering that is over solid wood,
such as the sheeted wing center section.  Observe the covering
to see if any bubbles appear.  If bubbles appear, the covering is
getting too hot!  Turn down the temperature of the iron and repeat
the test.

If no bubbles appear, turn up the heat slightly and repeat the test.
Keep adjusting until you “zero in” on the correct temperature.  Find
the temperature that will get the covering to stick down without
forming bubbles or causing the seams to pull away.  

Once your iron is set to the correct temperature, go over the entire
framework of the airplane, making sure that the covering is se-
curely bonded to the structure everywhere the covering comes in
contact with the wood underneath.  This takes some time, but is
worth the effort.

After you have all the covering secured onto the solid areas, turn
the temperature of the iron up to approximately 

300

O

F - 320

O

F

(149

O

C - 160

O

C)

.  This is the correct temperature for shrinking the

covering material.

Use the iron to tighten up any wrinkles in the “open” areas of the
model (no wood underneath the covering).  Glide the iron over the
wrinkle for a few seconds, then remove.  Repeat until the covering
is tight with no wrinkles.

If wrinkles keep coming back on the tail surfaces, you may need
to “ventilate” the areas between the ribs.  Otherwise the air that is
sealed in those relatively small areas will expand when the heat
is applied and actually cause the covering to stretch instead of
shrink.  Use a pin to poke a tiny hole in the covering between each
rib, on the bottom of the part.  That will let the expanding air es-
cape and the covering to shrink properly.

Caution When Using Heat Guns: You can also use a hobby-type
heat gun to shrink the covering, but you must be careful around
seams or color joints.  Getting too much heat on the seams may
cause them to "creep" or come loose.  You must also be careful
when using a heat gun when working around the windshield and
side windows - heat will distort the clear plastic material.

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)

4

COVERING MATERIAL

Summary of Contents for Rascal 72 EG

Page 1: ...5 5 lbs 2268 2495 g Wing Loading 16 17 6 oz sq ft 49 54 g dm2 Radio Required 4 Channel with 5 Standard Servos Glow Power 2 Stroke 40 46 cu in 6 5 7 5 cc 4 Stroke 40 54 cu in 6 5 8 8 cc Electric Power 500 800 watt Brushless Motor 50 60 amp ESC Lipo Battery Pack SIG MFG CO INC PO Box 520 Montezuma IA 50171 0520 www sigmfg com ...

Page 2: ... in Whatever brand engine you choose take the time to carefully break it in according to the manufacturer s instructions A good running reliable engine is a minimum requirement for the enjoy ment of this or any R C model aircraft PROPELLER FOR GLOW Refer to the engine manufacturer s instructions for recommenda tions on proper propeller size for their engine In our experience most 2 stroke 40 46 gl...

Page 3: ...ilable voltage in the cells en suring 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 REQUIRED TOOLS For proper assembly we suggest you have the following tools and materials available A selection of glues SIG Thin Medium Thick CA Glue CA Accelerator CA Debonder SIG Kwik Set 5 Minute Epoxy Screw...

Page 4: ...r rect temperature This is critical for achieving a good result The iron should be set to about 220OF 250OF 104OC 121OC as measured on the bottom of the iron using a thermometer If you do not have a thermometer you can find the correct tem perature by trial and error Set your iron to a medium setting Glide the iron over some of the covering that is over solid wood such as the sheeted wing center s...

Page 5: ...servo chord Inside this opening you will see another piece of wood with a string tied to it this is the other end of the string in the aileron servo bay Leave the string in place for now 2 First we will mount the aileron servos onto the molded plastic Aileron Servo Hatches a Begin by installing the rubber grommets and brass eyelets supplied with your radio system into each servo b Use epoxy to glu...

Page 6: ...ion Using the pre drilled mounting holes in the servo tray as your guide drill four 1 32 dia pilot holes through the sheeting in the bottom of the wing Then mount the hatch using the provided M2 6 x 8mm PWA Screws Repeat this step to mount the other servo hatch in the other wing panel 5 From the kit contents locate two Nylon Control Horns four M2 x 20mm Mounting Bolts and two wire Aileron Pushrods...

Page 7: ...other positions The difference can generally be found in the starting procedures used by individual modelers Flooding can be minimized by remembering to keep the carbure tor closed between flights and during fueling When first starting the engine keep the throttle in the low position Using an electric starter is recommended Avoid choking fuel through the line by placing your finger over the carbur...

Page 8: ...ow you to adjust the mounts to fit your engine After you get the mounts in correct position tighten all four mounting bolts securing the engine mounts on the firewall 5 Slide the engine forward or aft on the engine mounts until the front of the engine s thrust washer is 4 1 2 from the front of the firewall 6 Double check to make sure that the engine is pointing ex actly straight forward and then m...

Page 9: ...f the holes Use a sharp hobby knife blade to pierce the front wall of the closed hole Install the 3rd tube in that hole again with 3 8 of tube sticking out in front of the stopper assembly 3 Put the plain end of a 47 drill bit about 1 4 inside the back end of the vent tube Using the drill bit for leverage slowly bend the back end of the vent tube upwards at least 45O Do not to put a kink in the al...

Page 10: ...o the engine The best method is to sneak up on these openings continually trial fitting the cowling over the engine until it finally fits properly Once the opening is big enough for you to slip it over the engine and place it in correct location on the model then continue modifying the opening as needed to provide access to the needle valve and the fuel line tubing at the carb Note A Dremel Tool o...

Page 11: ...f the carburetor throttle arm c Put the carburetor in full high throttle position d Use a marker pen to mak the nylon pushrod tube where it should be cut and still accept 1 4 of the threaded stud e Use a sharp blade to cut the pushrod tube at the mark f Take the R C link and threaded stud off the carburetor throt tle arm Screw the end of the threaded stud at least 1 4 into the end of the nylon pus...

Page 12: ...hot at the location cut an angle on the end of the stick to allow you to hold the blind nut at the correct angle 3 Additional holes are needed in the firewall to allow air to flow back inside the fuselage to cool the battery and the ESC in flight We recommend drilling three new 3 8 dia holes in the lower part of the firewall as shown in the photo These three new holes in addition to the laser cut ...

Page 13: ...it of the cowl and make any adjustments needed with tape to hold it in place Then on the opposite side of the fuselage drill another 1 16 guide hole and install a screw into that hole Repeat this process for the remain ing two cowl mounting holes Remove the tape 10 COOLING IS IMPORTANT With a fully cowled in electric motor it is very important to make sure your power system is getting proper cooli...

Page 14: ... Spread the glue evenly over the exposed wood of the stabilizer saddle Carefully set the stabilizer back in position on the saddle Press the stabilizer down firmly and pin it in correct position Quickly recheck the alignment in both the top and front views before the glue dries Use a paper towel and rubbing alcohol to wipe off any excess glue that oozes out of the joint Let this joint dry complete...

Page 15: ...see in the hinge gap should have a dry appearance not wet Two to three good size drops of Thin CA should be about the right amount NEVER USE CA ACCELERATOR ON CA HINGES TAILWHEEL Locate the following parts from the kit contents 1 Leaf Spring with Tailwheel Steering Arm 3 M2 6 x 12mm PWA Screws 2 Coil Steering Springs 1 Mount the leaf spring assembly in place on the bottom rear of the fuselage a Fi...

Page 16: ... Be sure there is solid sheet balsa under the covering in the area you are putting the switch Use a modeling knife to cut the opening Use a 1 16 dia drill to make the holes for the bolts Install the switch Internal Mount Some flyers prefer to mount the switch internally to keep it away from dirt and fuel If you wish to mount your switch inside the fuselage you can simply stick it to the floor with...

Page 17: ...t least 1 4 Thread a metal R C link onto the stud centering the threads to allow equal adjustment in either direction b Slip the opposite end of the pushrod tube into the outer pushrod sleeve inside the fuselage on the right side for the ele vator servo Slide it all the way towards the back until you can clip the R C link into the outermost hole in the elevator servo arm c Turn on your radio syste...

Page 18: ...cal completely off the backing sheet being careful not to let the sticky side double over and adhere to itself Then spray the adhesive side of the decal as well Lightly position the decal in place on the wet surface of the model Do not push down The liquid allows you to slide the decal into the desired final position as long as you don t press down on it Once you have it in position gently squeege...

Page 19: ... and smoothly advance the throttle do not slam the throttle full open all at once As the RASCAL begins moving forward back off of the up elevator input and use the rudder only as needed to correct any engine torque and or wind induced deviations from a straight take off run Allow the airplane to lift off using ailerons to keep the wings level Climb to a reasonable altitude before mak ing any trim ...

Page 20: ...s you with 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 RASCAL 72 EG ARF Should you encounte...

Reviews: