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. 

c. When the glue has cured remove the 

wing from the building board.

 
21

 
a.

 
Cut the 1/4" triangular piece into eight 1" 
pieces. Referring to the photograph and 
the plans glue them to the sides of the 
two W-1T wing ribs. Find the two 
1/8"x5/8"x6-5/8" Wing Mounting Plates 
(P-1)and check their fit in the wing. 
DO NOT GLUE IN NOW.

 

 
b.

 
Find the two 1/2"x5/8"x1-1/8" maple top wing mount blocks (B-1) and position them on P-1 between the two innermost W-
1T ribs and mark their location on the P-1. Remove the blocks and plates from the wing and glue the blocks to the plates. 
After the glue has cured use the hole in P-1 as a guide to drill a 3/16" hole through each maple block.

 

 
c.

 
Insert the assembled P-1 and B-1 (2) into the wing with the blocks facing the top of the wing. Check with a triangle to make 
sure the two plates are straight and true with the 1/8" top wing brace. Glue the plates in place. Fill in the spaces in the W-1T 
ribs below the plate with scrap balsa and sand to the rib shape. Fill in between the two W-1T ribs and the leading edge with 
the wing leading edge block (B-4) and sand to shape.

 

 
d.

 
When the glue has completely cured, remove the wing from the building board. Carefully remove all of the jig tabs on the 
ribs. Use a sanding block to smooth the outline of the rib to shape.
 

 

 

 
22

 
a.

 
Pin the partially assembled wing back to the building board. Make sure the full 
length of the wing at the spar is down against the building board. Using a 
1/4"x1/2"x36" balsa stick as a jig/spacer pin the trailing edge to the building board. 
Be very careful that everything is straight and flat, this is the step that "sets" the 
shape of the wing.

 

 

 
b.

 
True up one edge of each of two 1/16"x3"x24" balsa sheets. Pin the trimmed edge 
of the sheet to the shaped leading edge, one sheet to each side of the wing. Now 
glue these sheets to the leading edge, ribs, spar and innermost W1-T rib.

 
23

 
a.

 
Install a 4-40 blind mounting nut in each of the I-strut top mounts (P-2) with a small hammer. Be sure you make a right and 
a left P-2 assembly. Spread epoxy glue over the blind nuts to hold them in place. Be careful not to get any glue in the 
threads of the blind nuts.

 

 
b.

 
Using epoxy or medium CA glue P-2 
between the two closeset ribs on each 
panel of the wing. The blind nuts should 
be on the inside surface of the P-2 when 
you are done. The top of P-2 must be 
pushed firmly against the capstrips on 
the top of the ribs. This step is critical for 
the alignment of the interplane struts 
later on. Refer to the cross-section of the 
I-strut on plan sheet 2 of 2.

 

 

Summary of Contents for SIGRC69 HOG BIPE

Page 1: ...Sig Mfg Co Inc 401 7 South Front Street Montezuma Iowa 50171 0520 ...

Page 2: ...ship is not mandatory it is a good idea and we encourage all new R C fliers to join the AMA Membership in the AMA provides you with important liability insurance protection 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 Phone 765 287 1256 COMPLETE ...

Page 3: ... 8 32x1 1 2 Mounting Bolts Axles 6 8 32 Hex Nuts Axles 2 4 40 Hex Nuts Aileron Interplane Pushrods 14 4 40 Blind Nuts Cabane Struts I Struts Wheel Pants 7 6 32 Blind Nuts Motor Mounts Landing Gear 2 8 32 Blind Nuts Top Wing Mount 10 4 Flat Metal Washers Cabane Struts I Struts 2 8 Flat Metal Washers wheel spacers 2 2 Flat Metal Washers Tailwheel retainers 4 Nylon Interconnect Horns For Ailerons 1 M...

Page 4: ...ee photos of sanded F1 in the fuselage section About The Wood In The Kit We strive to supply good quality materials in all SIG kits However wood is a highly variable material unlike man made plastic or metal so every single wood part in a kit will probably not have flawless appearance Often things that look like an imperfection are actually quite acceptable when you consider the function the part ...

Page 5: ...ousehold patching plaster it s way too heavy Glue There are so many different types of glue available today for model airplane construction that it can be confusing to even the experienced modeler To simplify matters most model airplane glues can be classified as one of four basic types 1 Cyanoacrylate Adhesives such as SIG CA are very strong and bond in just seconds Dramatically speeds up buildin...

Page 6: ...ng blocks available in hobby shops or you can make your own A good general purpose sanding block can be made by wrapping a full size standard 9 x11 sheet of sandpaper around a piece of hardwood or plywood as shown below This is the most commonly used sanding block in our workshop Use screws or thumbtacks along one edge to hold the overlapped ends of the sandpaper in place Put 80 grit sandpaper on ...

Page 7: ...e blind nuts d Using the side view of the plans as a guide position the engine on the mounts so the propeller will clear the fuselage cheeks by 1 8 to a 1 4 and mark the engine mounting holes Keep the as far back on the motor mounts as possible Remove the mounts from the firewall and drill the holes for the engine mounting bolts Bolt the engine to the motor mounts the motor mounts to the firewall ...

Page 8: ...rs F 5 F 6 F 7 and F 8 in place between the fuselage sides Place a rubber band around the fuselage at each former location to hold everything together tightly Check that former F 7 is facing the correct way for the pushrod guide holes d One at a time slide the lite ply parts fuselage bottom rear FBR fuselage top front FTF and the stab support under the rubber bands until they all snap into their c...

Page 9: ...ce and glue with medium CA Pay particular attention to the joint between FBF and the landing gear mount and glue both the outside and inside of this area Note The hole in FBF is provided to serve as an oil drain hole as well as a convenient place to route the vent line from the fuel tank and or the breather line from the crankcase of a four stroke engine 10a Glue balsa formers F 2 and F 4 in the c...

Page 10: ... sand the assembly smooth and flat 14a Centered over the holes in the fuselage side cut four 1 2 x1 2 clearance holes in the balsa sides of the front deck for the aluminum cabane mounts 14b Making sure the slots in the cabane mounting blocks are clear of any debris slide the cabane mount assembly in place in the four slots in the fuselage Check the alignment of the holes in the aluminum cabane str...

Page 11: ...the building board c Center the 5 16 x5 16 x48 shaped leading edge on the ribs and glue to all of the ribs d True up one edge on each of two 1 16 x1 1 2 x48 balsa sheets and cut them down to 1 wide by trimming the second edge Glue one piece to the bottom trailing edge of each rib Use the glue sparingly so that you don t glue the partially cut jigging tabs to each rib Now glue the other piece to th...

Page 12: ...g board Carefully remove all of the jig tabs on the ribs Use a sanding block to smooth the outline of the rib to shape 22a Pin the partially assembled wing back to the building board Make sure the full length of the wing at the spar is down against the building board Using a 1 4 x1 2 x36 balsa stick as a jig spacer pin the trailing edge to the building board Be very careful that everything is stra...

Page 13: ...stick to the trailing edge of the ribs c When the glue has cured carve and sand the trailing edge to shape Match the taper of the trailing edge stick to the shape of the ribs and maintain a sharp corner at the trailing edge d Sand the sticks and sheeting at each end flush with the end rib and perpendicular to the spar 26a Find the four lite ply wingtips and the four lite ply wingtip supports Assse...

Page 14: ...all of the corners to a pleasing shape 29 Fill in any dings dents or gaps with glue and or filler With a long sanding block sand the entire wing to remove any bumps and sharp edges Try to achieve a smooth even surface all over the wing BOTTOM WING CONSTRUCTION NOTE The bottom wing is built in two pieces It is easier to build one bottom panel at a time it s much easier to set the center rib angle w...

Page 15: ...he plans Make sure that the web is glued to all the adjoining pieces Here s another place that you don t want to be stingy with the glue 34 a True up one edge of a 1 16 x3 x24 balsa sheet Pin the trimmed edge of the sheet to the shaped leading edge Now glue the sheet to the leading edge wing ribs and top spar b Using pieces of 1 16 x1 4 balsa strip cut and glue capstrips on the top of each wing ri...

Page 16: ...ction of the I strut on plan sheet 2 of 2 c Cut a capstrip from 1 16 x1 2 balsa strip to fit at P 3 Notch one end of the capstrip to fit around P 3 and glue in place 38a Center one of the wingtip assemblies on an end rib Make sure the leading edge of the wingtip matches the leading edge of the wing and is centered on the leading edge Tack glue in place Center the trailing edge of the wingtip on th...

Page 17: ...e block up the panels in a stable position and let the glue cure 44 a Using 1 16 x2 x36 balsa sheets sheet the bottom of the center section as shown on the plans Let dry b Cut out the section of the two W 1B ribs between SBR 2 and the main spar where the servo will mount c Using 1 16 x2 x36 balsa sheets sheet the top of the center section as shown on the plans Let dry 45 a Using the plan as a guid...

Page 18: ...ularly important with biplanes so take your time and be very accurate when making alignment marks and when taking measurements Mark the center of the leading and trailing edge of the bottom wing on the bottom of the wing Also mark the center of the fuselage at the front and rear of the wing saddle b Place the bottom wing on the fuselage and check the fit If everything was properly built the wing s...

Page 19: ...htly to match the dihedral angle of the bottom wing Before gluing in place each B 2 needs to fit snugly against the fuselage side Former F 5 and the top of the bottom wing Glue both B 2 in place after you are satisfied with their fit b Cut two 1 1 2 lengths of 1 2 balsa triangular stock to brace both B 2 Glue a triangular brace between the top of each B 2 and the fuselage doubler don t be stingy w...

Page 20: ...s are provided for making the elevators Cut one of the elevator patterns from the plans and trace the outline on both pieces of tapered stock Cut the elevators to this shape Notice that one side of the tapered stock is rougher than the other Plan your cutting of the right and left hand elevators so the smooth side is used as the top on both elevators b With a solvent wipe the oil off the elevator ...

Page 21: ...rudder to a constant thickness Round off all of the edges of the rudder MOUNTING THE TAIL SURFACES 59 a Mark a centerline on the top of the stabilizer making sure that the centerline is perpendicular to the trailing edge of the stabilizer Pin the stabilizer to the fuselage mount the lower wing to the fuselage and measure from each tip of the stabilizer to the trailing edge of the lower wing Both m...

Page 22: ...hinge 2 Now make 3 or 4 more cuts in the exact same line going slightly deeper each time As you make these additional cuts concentrate on staying in the slit and keeping the blade headed straight into the center of the wood so that it won t come out the side of the part You will find that as the blade gets deeper into the wood it will become harder to move it along the slot Try wiggling the knife ...

Page 23: ...ipe them clean with alcohol Begin the job by soldering the inner washer which can be held in place with a temporary piece of heat proof silicone fuel tubing 1 When cool install the tailwheel followed by a thin cardboard spacer and the outer washer 2 Solder the washer allow to cool then remove the cardboard spacer Grind off the excess wire and file the end smooth 3 Done properly this installation s...

Page 24: ... to lock the threaded rod in place Thread a nylon clevis on the exposed end of the threaded rod until the threads are through the clevis c Tape the elevators firmly in the neutral position and install an inner pushrod assembly in the outer tube closest to the bottom of the stabilizer Using the plan and the pushrod assembly as guides mark the location of the two holes for bolting on the elevator ho...

Page 25: ...pant halves Spot glue the joint with thin CA remove the tape and glue the complete seam with medium CA c Cut out the bottom of the wheel plant to accept the wheel mounted in part a Reglue the inside seam of the wheel pant with medium CA d Using the plans as a guide glue the attach plate to the inside of each wheel pant with the slot down Slot the wheel pant to match the mounting plate and drill tw...

Page 26: ... the heaviest moveable item If this is not enough you might try moving the receiver or horrors add a little lead in the appropriate spot DO NOT FLY WITH THE AIRLANE TAIL HEAVY YOU WILL PROBABLY CRASH The balance points or centers of gravity CG measured from the leading edge of the top wing are 25 3 5 8 Good place to start if this is your first biplane 30 4 1 8 Better elevator response and quicker ...

Page 27: ...54 Weekdays 7 30 am 4 30 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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