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SIG Rascal 72 EG, Assembly Manual, Page: 3 / 20

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abled the BEC feature of our Castle ESC, since we no longer
needed BEC.  Disabling the BEC allows the speed control to be
used with both 3 cell and 4 cell packs without problems.  A com-
mon way to disable BEC in many ESCs is to remove or clip the
middle wire from the plug on the ESC that goes into the radio re-
ceiver - see your ESC manual for more guidance.

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3 or 4 cell 5300mah LITHIUM-POLYMER BATTERY PACK

With the Maxx Products HC3528-1000 motor we use 3 cell
(3S1P) 5300mah or 4 cell (4S1P) 5300mah Li-po packs.  A 3 cell
pack (11.1 volts) provides flight performance similar to a .40 glow
engine.  A 4 cell pack (14.8 volts) provides flight performance sim-
ilar to a .46 glow engine.  We find that 5300mAh lipo packs provide
between 10 to 18 minutes of flight time, depending on propeller
selection and other factors (quality of pack, throttle management,
outside temperature, etc.).  CAUTION: You must match your pro-
peller size to the cell count of your lipo pack, to avoid drawing too
many amps and damaging your ESC or motor.  

❑ 

PROPELLER FOR ELECTRIC

With the Maxx Products HC3528-1000 motor and a 3-cell (3S1P)
11.1v lipo pack, we recommend a APC 11x7E, APC 11x8E, or
APC 12x6E propeller.  All three sizes delivered good performance,
very reminiscent of a 2-stroke .40 glow engine.  For a starting prop
we recommend the APC 12x6E.  Other brand propellers of same
size and similar design can also be used.  NOTE:  Your results
may vary due to other factors - the specs of your individual motor
and battery pack, etc.  You may need to experiment with different
props to find your best combination.

With the Maxx Products HC3528-1000 motor and a 4-cell (4S1P)
14.8v lipo pack, we recommend a APC 10x6E, APC 10x7E, or
APC 11x5.5E propeller.  All three sizes delivered good perform-
ance, very reminiscent of a 2-stroke .46 glow engine.  For a start-
ing prop we recommend the APC 10x6E.  Other brand propellers
of same size and similar design can also be used.  

Hi-Maxx "COMBO 40" Complete System
Maxx Products, the manufacturer of the motor that we used in this
manual, markets a "Combo 40" electric motor system.   The Maxx
"Combo 40" package consists of (1) Hi-Maxx HC3528-1000
Brushless Outrunner Motor; (1) Prop Adapter Assembly; (1) Cas-
tle Creations 60 Amp Speed Control (ESC); and (1) APC 12-6E
Propeller.  It's a good system for the RASCAL 72.

              

Maxx Products, Inc.

              

815 Oakwood Rd.

              

Lake Zurich, IL 60047

              

www.maxxprod.com

              

Ph: 847-438-2233

❑ 

BATTERY CHARGER

FOR SAFETY AS WELL AS PERFORMANCE, CHARGE LIPO
BATTERIES ONLY WITH A LIPO BATTERY CHARGER!  
In addition to providing the critical charging profile needed to
safely charge lipo batteries, a lipo battery charger also includes
the capability of "balancing" the available 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

Screwdriver Assortment
Pliers - Needle Nose & Flat Nose
Diagonal Wire Cutters
Small Allen Wrench Assortment
Pin Vise for Small Dia. Drill Bits

Hobby Knife with Sharp #11 Blades
Small Power Drill With Selection of Bits
Dremel® Tool With Selection of Sanding & Grinding Bits
Scissors
Sandpaper
Covering Iron & Trim Seal Tool
Masking Tape
Paper Towels
Alcohol and/or Acetone For Epoxy Clean-up  

COMPLETE KIT PARTS LIST

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.  Use the check-off boxes (q)
provided in front of each part description.  Please also note that
the bolts and nuts required to mount your engine to the motor
mounts are not included and must be purchased separately.

❑ 

(1) Fuselage

❑ 

(1)  Right Wing Panel & Aileron, hinged

❑ 

(1)  Left Wing Panel & Aileron, hinged

❑ 

(1)  Horizontal Stabilizer & Elevator, hinged

❑ 

(1)  Vertical Fin & Rudder, hinges not glued

❑ 

(1)  Cowling with (4) M2.6 x 10mm PWA Mounting Screws

❑ 

(1)  Right & Left Molded Clear Plastic Side Windows

Main Landing Gear

❑ 

(1)  Formed Aluminum Main Landing Gear

❑ 

(2)  2-3/4" dia. Main Wheels

❑ 

(1)  Right Fiberglass Wheel Pant

❑ 

(1)  Left Fiberglass Wheel Pant

❑ 

(2)  M4 x 40mm Mounting Bolts, for axles

❑ 

(4)  M3 x 8mm Mounting Bolts, for wheel pant mounting

❑ 

(4)  M3 Split-Ring Lock Washers, for wheel pant mounting

❑ 

(4)  M4 Lock Nuts, for wheel and wheel pant mounting

❑ 

(4)  M4 Flat Metal Washers, for wheel & wheel pant mounting

❑ 

(2)  M4 x 20mm Mounting Bolts, for landing gear mounting

❑ 

(2)  M4 Split-Ring Lock Washers, for landing gear mounting

Tailwheel Assembly

❑ 

(1)  Leaf-Spring Assembly with Steering Arm & Tailwheel

❑ 

(1)  3-Arm Rudder Steering Horn, Metal

❑ 

(2)  M2 x 10mm PWA Screws, for Rudder Steering Horn

❑ 

(3)  M2.6 x 12mm PWA Screws, for Tailwheel Assembly

❑ 

(2)  Coil Steering Springs

Spinner Assembly

❑ 

(1)  2-1/4" dia. White Spinner Cone

❑ 

(1)  2-1/4" dia. White Spinner Backplate

❑ 

(1)  Prop Adapter Rings

❑ 

(2)  T3 x 10mm Phillips-Head Mounting Screws

Aileron Servo Hatches

❑ 

(1)  Right Plastic Aileron Servo Hatch

❑ 

(1)  Left Plastic Aileron Servo Hatch

❑ 

(4)  5/16" X 1/2" X 7/8" Hardwood Servo Mounting Blocks

❑ 

(8)  M2.6 x 8mm PWA Screws for servo hatches

❑ 

(4)  M2 x 6mm PWA Screws for servo blocks

Control Horns, Etc.

❑ 

(4)  Nylon Control Horns; for ail(2); elev(1); rud(1)

❑ 

(8)  M2 x 20mm Mounting Bolts; for control horns

❑ 

(2)  1/4-20 x 1-1/2" Nylon Wing Bolts

❑ 

(1)  5/16" x 3/4" x 3-3/16" Balsa Fuel Tank Retainer

Pushrods

❑ 

(2)  1/8" dia. x 25-1/2" Nylon Inner Pushrod Tubes, rud. & ele.

❑ 

(1)  1/8" dia. x 16" Nylon Inner Pushrod Tubes, for throttle

3

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...

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