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SIG Four-Star 40 SIGRC44, Инструкция по сборке и управлению, Страница: 19 / 22

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68.

Install 2-3/4" main wheels on the aluminum landing gear using the hardware as shown on the plans. A drop of CA on the 
inner nut will help keep the assembly from vibrating loose. Once the wheels have been attached, the landing gear 
assembly can be bolted to the fuselage using three 6-32x1/2" mounting bolts. 
 
NOTE: Optional wheel pants can be installed as shown in the diagram to help spruce up the appearance of your model. 
Use SIGSH378 plastic wheel pants (not included in kit) painted to match your color scheme.

 
69.

 

a. If you wish to install a pilot, now is the time to do it. Be sure to glue it firmly so it won't come loose in flight.  
b. Cut the excess plastic away from the canopy using scissors. Cut to the mold line around the front and at the sharp 

corner around the back. Sand the rough edges smooth being careful not to scratch the clear plastic.  

c. Trial fit the canopy to the fuselage and trim if necessary for a good fit. Position it so that the raised frame ends at 

the rear tips of the top deck and tape it down at a couple of spots.  

d. Our canopies have all been attached just using 1/4" striping tape applied half to the canopy and half to the covering 

material around the canopy, with good results. This allows you to easily remove and replace the canopy if ever 
necessary. Finish off the canopy with 1/4" striping tape applied to the raised frame and at the back edge.  

 
NOTE: The back edge of the canopy should only touch the three fuselage 
stringers when installed properly. However, we have found that after many flights, 
the back edge will begin to cut through the covering material at those spots, due 
to vibration. To avoid this chafing problem, apply a spot of CA or silicone rubber 
sealant (available at hardware stores) at each of the stringers where the canopy 
makes contact.
 
The remaining sections of these instructions concern engine and fuel tank 
installation, radio installation, pre-flight checkout, and flying provide information 
that is specific to the FOUR-STAR 40. For a more indepth look at any of these 
subjects, please refer to "The Basics of Radio Control" booklet also included with 
this kit. In particular, it is strongly recommended that you go through the "Pre-
Flight Checklist" in Chapter 7 carefully before attempting to fly.
 

Engine And Fuel Tank Installation

 
Engine installation on the FOUR-STAR 40 is simply a matter of bolting the engine mounts that were prepared in step 28 to 
F-1, then bolting your engine to the mounts. Finish installing the throttle cable (which was partially prepared in step 51) by 
soldering the connector in place on the servo end of the cable.
 
Like most Sig kits, the fuel tank in this model is installed from the rear of the fuel tank compartment rather than through a 
removable hatch. This choice was made for several reasons. A hatch opening makes the nose weaker and it's very difficult 
to keep oil from leaking in around a hatch. A method of fastening the hatch must be built into the fuselage, adding to the 
complexity and construction time. Besides, modern plastic fuel tanks are virtually fMestructible under normal use when 
installed properly, so they seldom need to be removed for maintenance.
 
An 8 ounce fuel tank is recommended for the FOUR-STAR 40, although most 
tanks from 6 oz. to 10 oz. will work. A Sullivan Products 8 oz. Slant Type, RST 
Type, or Round Type will fit easily, as will an 8 oz. Du-Bro tank. A 10 oz. Sullivan 
tank (RST, Slant, or Round Type) or a 10 oz. Du-Bro tank will require some 
modifications (widening) to the opening in F-2. Most engines will require the tank 
to mounted as high as possible in the fuselage. Use foam rubber under the fuel 
tank as necessary to position it properly.

 

 

Radio Installation

 
Screw the nylon control horns onto the rudder and elevator as shown on the plans, then re-install the inner nylon push 
rods that you prepared in step 49. Snap an R/C link on the rudder horn, then cut off the excess nylon tubing, leaving a 1/8" 
gap between the end of the tubing and the R/C link. Cut a 2-56x10" threaded rod to an overall length of 3-1/4", measuring 
from the threaded end. Install the threaded rod in the nylon tubing, smooth end first, so that approximately 1/2" of the 
threaded portion remains exposed. (The metal rod will help prevent the nylon tubing from buckling under flight loads.) 
Thread the R/C link onto the end of the push rod until the rudder is neutral, then repeat the procedure for the elevator. 
 
The aileron servo can be mounted to short lengths of hardwood as can be seen on the W-1 cross section on the plans. 

Содержание Four-Star 40 SIGRC44

Страница 1: ......

Страница 2: ...on the fuselage instead of the wing simplifies wing construction and lowers the parts count The tailwheel is a bit unique in that it s attached directly to the rudder without the usual plastic tailwheel bearing We ve tested this installation quite extensively without any problems The amazing strength of EASY HINGES and cyanoacrylate adhesive make this simple effective tailwheel installation possib...

Страница 3: ... in contact and positioned correctly before glue application This feature is useful when laminating large sheeted areas like a fuselage side and a fuselage doubler Sig Kwik Shot Accelerator Spraying accelerator on CA any thickness will cure it almost instantly Although CA is fast it s sometimes nice to speed it up even more Debonder This can be used to separate parts but you ll probably use it for...

Страница 4: ...lable Plan ahead Read the book completely and study the full size plans before beginning construction Refer to The Basics of Radio Control In addition to the instruction booklet you are reading now the booklet The Basics of Radio Control has been included with this kit as a reference for installing the engine fuel tank and radio in the FOUR STAR 40 It also contains very important information on pr...

Страница 5: ...ottle pushrod 4 2 56x10 Threaded Rods 2 ailerons l elevator l rudder 15 Easy Hinges Notes Before Beginning Construction Any references to right or left refers to your right or left as if you were seated in the cockpit To build good flying models you need a good straight building board Crooked models don t fly well The building board can be a table a workbench a reject door core from the lumber yar...

Страница 6: ...ng ribs to the spars and trailing edge sheeting b Place scraps of 1 16 balsa near the main spar to accurately space the W 1 wing ribs up from the building board The spacing is required for the center sheeting to be added later c Use the dihedral guage side of the die cut Dual Tool to set the root W 1 rib at the proper dihedral angle before gluing it in place Add the two remaining W 1 ribs 3 a Glue...

Страница 7: ... step Otherwise you may find it difficulf to remove your wing from the board later 6 Pieces for the top center sheeting should be cut from the 1 16 x3 x30 balsa provided in the kit Again Sig Bond is recommended for the front and rear edges of the sheeting to make it easier to sand the joints smooth Also use Sig Bond on the center W 1 rib The sheeting can be glued to the ribs on each end using CA 7...

Страница 8: ...own in the photo Using a modeling knife carefully cut out the outlined area This step accomplishes two things First it clears an area for the aileron servo and second it provides an open area between the main wing spars for the dihedral brace 14 Repeat steps 1 through 13 to build the opposite wing half Joining The Wing Panels 15 a Trial fit the two wing halves with the dihedral brace installed bet...

Страница 9: ...ue in the brass bearings The outer end of the bearings should be even with the outer end of the blocks 18 a Glue the torque rod block assemblies in place on the wing T E again being very careful not to get any glue in the bearings b Notch the balsa trailing edge just forward of the notches in the torque rod blocks to allow full movement of the torque rods c Sand the top of the basswood blocks to m...

Страница 10: ...A will help fill in the weave of the fiberglass resulting in a smoother surface Rub the second coat with your finger protected with plastic wrap keep it moving to smooth out the glue Use a fan to keep the CA fumes away from your face 4 When dry sand lightly to remove any rough spots Try not to sand into the fiberglass tape itself Ailerons 23 Sand the trailing edge of the aileron round and bevel th...

Страница 11: ... the engine mounts To avoid any conflict drill a 1 4 dia relief partially through the back of the mounts at each hole 28 Position your engine on the mounts far enough forward for the propeller to clear the fuselage cheeks and mark the engine mounting holes Remove the mounts then drill at the marks with a bit that s just large enough to clear your engine mounting bolts When the time comes to fasten...

Страница 12: ...he correct angle 35 a Glue the three 3 16 x1 4 x18 balsa fuselage stringers in place b When dry trim off the front of the stringers flush with the front of HR 36 a Bevel the top edge of the fuselage sides with a sanding block to provide a firm seat for the fuselage top deck when it is installed Notice that the angle between the top deck and the fuselage sides varies along the entire length Don t w...

Страница 13: ...to the wing dowel and W 1 wing ribs by working through the opening in the bottom of the wing Be careful not to allow the glue to run down and bond the dowel to F 2 e When dry remove the wing and fill any gaps around the dowel with another application of glue 42 a The 1 4 x3 4 x1 basswood wing hold down blocks key into the notches in the fuselage doubler To accurately fit them temporarily tape or p...

Страница 14: ...e outside of the fuselage b Install the die cut Lite Ply stab support so that it is flush with the top of the fuselage sides c When dry sand the Tee Lock tabs on the stab support flush with the fuselage sides 48 a The nylon pushrods must be supported at each former to keep them from flexing under load Use the die cut Lite ply pushrod straps F 3S and F 4S to support the pushrods Notice that the pus...

Страница 15: ...both of them at the tips until they match perfectly The tips can be left square or sanded round if you prefer 55 a Sand the pre cut 3 16 balsa fin leading edge round b Sand the trailing edge of the pre cut 3 16 balsa rudder round c Draw a hinge line centered on the leading edge of the rudder Bevel the L E using the hinge line as a guide d Sand a notch in the rudder leading edge to clear the elevat...

Страница 16: ...n the wingtips run the covering material around the corner about 1 8 Later when the main top and bottom covering pieces are applied they will overlap the wingtip covering and can be trimmed at the wingtip corners leaving a virtually invisible seam Extend the covering material about 1 8 past the outside edges of the hold down plates again to provide an area for overlap Cover the main portion of the...

Страница 17: ...58 Using a No 11 X Acto blade or similar cut slots approximately 1 2 in depth and slightly wider than the hinges Cut eight slots in the stabilizer and eight matching slots in the elevators at the locations shown on the plans 59 After all of the slots have been cut insert EASY HINGES halfway into the stabilizer slots DO NOT GLUE THE HINGES YET Next carefully slide the elevators onto the hinges You ...

Страница 18: ...e the stabilizer to the fuselage using Kwik Set epoxy Recheck its alignment and adjust as necessary before the glue dries 66 a Cut away a 3 16 wide strip of material from the center of the stabilizer where the fin is to be glued Epoxy the fin to the top of the stabilizer using a triangle to check its alignment as it dries Make certain that the back edge of the fin is lined up with the back edge of...

Страница 19: ...nded that you go through the Pre Flight Checklist in Chapter 7 carefully before attempting to fly Engine And Fuel Tank Installation Engine installation on the FOUR STAR 40 is simply a matter of bolting the engine mounts that were prepared in step 28 to F 1 then bolting your engine to the mounts Finish installing the throttle cable which was partially prepared in step 51 by soldering the connector ...

Страница 20: ...ioning Guide to set the ailerons in neutral as shown on the plans When you get to the field don t be surprised if the elevator and rudder are suddenly misaligned Temperature and humidity changes can cause the nylon push rod tubes to expand or contract slightly Use the trim levers on the transmitter to reneutralize the control surfaces and do the final trimming in the air The control surface moveme...

Страница 21: ... back increases its sensitivity to control inputs but if carried too far the model can become completely unstable and uncontrollable The balance range shown on the plans is a safe area to use for test flights Don t exceed the rearward limit unless you are a very experienced pilot When landing the FOUR STAR 40 may tend to float a bit more than other models you have flown in the past so be ready to ...

Страница 22: ...pm Central Copyright SIG Mfg Co Inc SIG MFG CO INC Montezuma Iowa 50171 0520 LIMIT OF LIABILITY In use of our products Sig Mfg Co s only obligation shall be to replace such quantity of the product proven to be defective User shall determine the suitability of the product for his or her intended use and shall assume all risk and liability in connection therewith ...

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