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There is no one type of muffler that is best suited to the MID-STAR 40. It all depends on the particular engine that you have 
selected. If you have a 2-stroke engine, use the muffler that was supplied with it or one of the many aftermarket mufflers that 
are available. As with any mid-wing model, its a good idea to install a commercially-available exhaust diverter to keep the 
engine exhaust from hitting directly on the leading edge of the wing. Most 4-stroke engines don't require a muffler because of 
their low noise production. Angle the exhaust stack on your 4-stroke engine up and away from the model.
 

Radio Requirements

 
A four-channel radio system is required for the MID-STAR 40 to operate the ailerons, elevator, rudder, and throttle. The 
fuselage is spacious enough that any common brand of radio equipment with standard size servos and battery pack can be 
used. Be certain that your radio system's frequency is approved for use in R/C nodel aircraft.

 

You Can't Get Along Without A Good Sanding Block

 

 

An assortment of different size sanding blocks are indispensable tools for model 
construction. A good general purpose block can be made by wrapping a 9"x11" 
sheet of sandpaper around a piece of hardwood or plywood. Use three screws 
along one edge to hold the overlapped ends of the sandpaper. Put 80-grit paper 
on the block during general construction. Switch to 220 grit paper for final 
sanding just before covering. 
 
In addition to the large block, there are places where a smaller one is handy. 
Also, a sandpaper "file" can be made by gluing sandpaper to a flat spruce stick 
for working in tight places.

 

About The Building Sequence

 
The quickest and most efficient way to complete a model is to work on several pieces at the same time. While the glue is drying 
on one section, you can start on or proceed with another part. Work can even go forward on several sections of the same 
assembly at the same time, such as the front and rear sections of the fuselage.
 
Keep in mind that the number sequence used in these instructions was chosen as the best way to explain the building of each 
major component and is not intended to be followed in exact one-two-three fashion. Start on the wing at No.1 and after doing as 
many steps as is convenient, flip over to "FUSELAGE CONSTRUCTION" and do a step or two there, then back to "WING 
CONSTRUCTION" and so forth. You will, of course, arrive at points where you can go no farther until another component is 
available. Plan ahead, read the instructions completely and study the full size plans before beginning construction.

 

Refer To "The Basics Of Radio Control"

 
"The Basics of Radio Control" booklet has been included with this kit as a reference for installing the engine, fuel tank, and radio 
in the MID-STAR 40. It also contains very important information on preparing the model for flight. Modellers of all experience 
levels are encouraged to read this book and follow its guidelines for success.
 

COMPLETE KIT PARTS LIST

Die-Cut Balsa Sheets

3 3/32"x3"x9" W-1 Wing Ribs

4 3/32"x3"x 18" W-2 Wing Ribs

Sheet Balsa

2 1/16"x1-1/4"x30" Top Trailing 

Edge Sheeting

2 1/16"x1-1/2"x30" Bottom Trailing Edge 

Sheeting

2 1/16"x3"x30" Wing Center 

Sheeting, Top and Bottom

18 3/32"x3"x1-3/16" Shear 

Webs (3 bundles of 6)

1 1/4"x4"x6" Hatch

Stick Balsa

6 3/16"x3/16"x30" Front Spars, 

Rear Spars

2 1/4"x1/4"x30" Trailing Edges

2 5/16"x5/16"x30" Leading 

Edges

1 1/4"x1"x3-5/8" Nose 

Brace

2 1/4"x1"x4-3/16" Stab Tips

1 1/2"x30" traingle Braces for F-1, Wing Hold 

Down Blocks, Landing Gear Bolck and Fin 
(optional)

Special Shaped Balsa

1 3/16"x2-1/2"x9" Pre-Cut 

Rudder

1 3/16"x4"x8-1/2" Pre-Cut Fin

2 1/4"x2'x9-1/2" Pre-Cut 

Elevators

1 1/4"x5"x18" Pre-Cut 

Stabilizer

2 1/4"x1"x30" Ailerons 

(tapered, with rounded edge)

2 1/4"x1/4"x18" Fuselage Stringers (beveled 

edges)

Содержание MID-STAR 40

Страница 1: ...as no leading edge sheeting which helps speed construction The simple pre cut balsa tail parts also save time The model can be completely covered with iron on film with only a small amount of painting required One important decision that you will need to make before building is whether to use tricycle landing gear on your MID STAR 40 or make it a taildragger New pilots who are transitioning from a...

Страница 2: ...ing the plywood fuselage parts The extra thickness allows the glue to fill small gaps but it dries a little slower than thin CA If you want only one type of CA use medium thickness Sig CA Slow This thickest formula is good for filing large gaps and building up strong fillets at joints requiring extra strength It also dries slow enough to allow you to apply it to one part and position it on another...

Страница 3: ...n you can start on or proceed with another part Work can even go forward on several sections of the same assembly at the same time such as the front and rear sections of the fuselage Keep in mind that the number sequence used in these instructions was chosen as the best way to explain the building of each major component and is not intended to be followed in exact one two three fashion Start on th...

Страница 4: ...g center and tailwheel wire 2 6 3 4 x27 3 Color Decal 1 Full Size Printed Plan 1 Photo Illustrated Instruction Booklet 1 The Basics Of Radio Control Booklet Hardware 4 2 x1 2 Sheet Metal Screws for control horns 2 4 40 x3 8 Flat Head Mounting Bolts for hatch 1 4 40 x 3 8 Mounting Bolt for canopy hold down 8 4 40 x1 2 Mounting Bolts for nose gear bearing and landing gear 4 6 32 x3 4 Mounting Bolts ...

Страница 5: ... piles to avoid confusion during building WING CONSTRUCTION Before beginning wing construction carefully splice together the Left Wing Panel plans so that the X and Y indicators meet Use a straightedge to double check the alignment of the plans before taping them at the seam Tape or pin the plans to your building board and protect them with a layer of waxed paper Build each wing half separately 1 ...

Страница 6: ... step Otherwise you may find it difficult to remove your wing from the board later 6 Pieces for the top center sheeting should be cut from the 1 16 x 3 x 30 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...

Страница 7: ...tout guide 1 RCG 1 on the inboard W 1 wing rib The top of RCG 1 should be flush with the top of the center sheeting and the notches at the rear should fit around the main wing spars Trace the notches for the wing hold down dowel and the canopy hold down block with a sharp pencil c Remove the guide then measure and mark the cutout area on the top center sheeting using the dimension shown in the pho...

Страница 8: ...ng When dry trim BP flush with the bottom center sheeting 17 a The aileron torque rods have been pre bent so that the threaded portion leans rearward slightly inside the fuselage see the W 1 wing rib cross section on the plans That small angle will provide your MID STAR 40 with a bit of differential movement more up that down in the ailerons which makes for smoother rolling characteristics Prepare...

Страница 9: ...3M 77 b Position the tape on the wing center joint c Soak the tape with CA The spray adhesive simply holds the tape in place it won t affect the strength of the CA A second coat of CA will help to 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 a...

Страница 10: ...hing aircraft lock nuts to fasten the engine to the mounts engine mounting bolts and nuts are not included in the kit Locate and mark the best spot on the firewall for the throttle pushrod to exit and line up with your engine s carburetor control arm Drill at the mark with a 9 64 drill bit Remove the engine and engine mounts NOTE If you are building the optional taildragger version of the MID STAR...

Страница 11: ...age sides These will be sanded off after the fuselage has been completely assembled 36 a Place the fuselage over the top view on the plans to check its alignment Correct if necessary by twisting gently before proceeding View the fuselage directly from the rear to be certain that the joint where the fuselage sides meet is square with the fuselage bottom b Carefully glue all of the parts permanently...

Страница 12: ...m as necessary to clear the blind nuts on the back of F 1 Apply slow CA to the braces and press them firmly in place c Install the die cut Lite Ply tank floor so that it is sealed on the fuselage doublers and against the back of F 1 then glue it in place 42 a Glue the 1 4 x1 x3 5 6 balsa nose brace to the top of the fuselage and F 1 b When dry hold the die cut 3 32 plywood hatch tongue in position...

Страница 13: ...serve as a wing hold down dowel Save the remaining piece for the canopy hold down dowel b Sharpen one end of the wing hold down dowel to a point keep the point symmetrical and centered With the hatch removed push the dowel into the hole in F 2 so that only the point sticks out into the wing opening Slide the wing into position making sure it is centered on the fuselage When you remove the wing the...

Страница 14: ...bolts 52 a The servos need to be mounted in the fuselage so that the nylon pushrods can be routed properly with the least amount of curvature Refer to Chapter 2 of The Basics Of Radio Control and the plans for information on where and how to mount the servos in the fuselage Start by cutting two 3 1 4 long servo rails from the supplied 3 8 sq basswood Use the servo tray provided with your radio to ...

Страница 15: ...nk compartment Mark the locations of the fuel lines on F 1 remove the fuel tank then drill holes through F 1 at the marks using a drill bit that s the same diameter as the fuel tubing you plan to use You should also redrill the holes for the throttle and nosewheel pushrods 9 64 dia since they were both probably covered up by the triangle braces installed in step 41 Canopy Installation 59 NOTE The ...

Страница 16: ...canopy b The canopy hold down screw will pass through the extended front flange Tape the canopy in place on the model and carefully mark the location of the hole for the canopy hold down screw Be certain that the hole will pass directly through the center of the canopy hold down block in the wing c Drill through the canopy flange and canopy hold down block at the same time with a 1 8 drill bit 65 ...

Страница 17: ...dge using the hinge line as a guide 70 The top of the fin or rudder may need sanding so that they line up when installed Temporarily pin or tape the stabilizer and fin on the back of the fuselage then tape the rudder to the fin so that its bottom edge is aligned with the fuselage bottom Remove the fin and rudder which are still taped together and sand the top edges until they match NOTE If you are...

Страница 18: ...ow access to needle valves carburettor adjusting screws etc When satisfied remove the engine and touch up the cutouts with some sandpaper Since it s too difficult to apply covering material inside the engine compartment it must be fuel proofed using several coats of clear dope or two coats of polyester glass resin sanded between coats Finish off the engine area with a few coats of colored Sig Supe...

Страница 19: ...iece of material extending it about 1 8 past the outside edges of the plates again to provide an area for overlap Cover the main portion of the wing starting with the bottom and then the top so that the seams will be on the bottom where they will be less visible The top covering should overlap the full width of the leading trailing edge Wait until both the top and bottom pieces of covering materia...

Страница 20: ...nutes the joint should be flexed to full deflection in each direction a couple of dozen times to reduce the stiffness Don t worry about shortening the life of the hinges as they are almost indestructible 76 The rudder is hinged in the same manner as above but it is easier to install AFTER the fin has been glued to the fuselage Cut slots for three hinges now 3 slots in the rudder two in the fin and...

Страница 21: ...n 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 four 4 40 x 1 2 mounting bolts NOTE If you are building the optional taildragger version of the MID STAR 40 skip step 84 and proceed to step 85 If you are building the standard tricycle gear version perform step 84 skip step 85 and procee...

Страница 22: ...length of 3 1 2 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 pushrod until the rudder is neutral then repeat the procedure for the elevator The aileron servo can b...

Страница 23: ...ing and using it that you would with a can of gasoline or a bottle of poison Remember that it is possible to lose control of a model airplane Do not fly in locations where the model may hit people or damage property if loss of control occurs Check your model and equipment regularly to insure it is in safe operating condition FLYING The MID STAR 40 is a fun aircraft to fly but it is not a basic tra...

Страница 24: ...g final approach Slow the model down during the entire approach by slowly feeding in up elevator Just before the model touches flare the landing by carefully feeding in more up elevator Hold the model just inches off the ground until your elevator stick is pulled all the way back The MID STAR 40 should settle in for a perfect nose high landing with a short rollout MODELER S TIP The canopy gives th...

Страница 25: ...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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