SUKHOI SU-26 INSTRUCTIONS When it was introduced, the outstanding Russian SUKHOI took the aerobatic world by storm! Never before have aerobatic enthusiasts had a machine so capable that it appears to have no limits.
ITEMS NEEDED TO COMPLETE THIS KIT TOOLS AND SUPPLIES REQUIRED FOR ASSEMBLY 1 RADIO GUIDANCE SYSTEM (4 CHANNEL MINIMUM REQUIRED) 1 ENGINE .90 2-CYCLE OR 1.20 4-CYCLE (NO BIGGER!) 1 PROPELLER (SIZE DEPENDS ON ENGINE) 1 12-16 OZ. FUEL TANK 1 12" SILICONE FUEL LINE 2 3-1/2" DIAMETER WHEELS 1 1-1/4" DIAMETER WHEEL 3 ROLLS IRON ON COVERING FLIM 1 CGP 3" DIAMETER SPINNER 3 2 OZ.
INTRODUCTION USING THIS INSTRUCTION MANUAL Because the fuselage plugs together and is selfaligning, it is not built directly over the plan. As you assemble the fuselage, you will find the plan helpful in identifying parts and how things fit together. The plan also shows the installation of a typical radio, battery and all remaining equipment and hardware needed to complete the model. By referring to the examples shown, you should be able to install your own radio, etc.
WOOD PARTS ABOUT THE WOOD IN THE KIT Be careful when removing parts (such as fuselage formers) from the laser-cut sheets. Long parts are fragile until glued into a structural unit. If necessary, use a razor knife or razor saw to assist in the removal of parts from the sheet. Sometimes a little trimming and sanding can improve parts, where desired. Save scrap until the model is completed, in case a part is missing or damaged. Also, scrap is used in some building steps.
RIB #3 RIB #4 RIB #5 D/C SHT. 6725 2 REQ’D D/C SHT. 6714 2 REQ’D AILERON RIB RIB #6 RIB #7 RIB #10 D/C SHT. 6715 2 REQ’D RIB SPACER GAUGE RIB #8 RIB #9 AILERON RIB D/C SHT. 6716 2 REQ’D TIP SHEET WING BOLT PAD SHEAR WEB D/C SHT. 6726 1 REQ’D AILERON COVER SHEET CENTER SHEET D/C SHT. 6718 2 REQ’D D/C SHT. 6719 4 REQ’D ELEVATOR HORN MOUNT STAB JOINER WING CENTER SHEETING D/C SHT. 6720 4 REQ’D D/C SHT.
TAIL CONSTRUCTION (10) LARGE FLEX POINT HINGE (1) WING PLAN (1) FUSELAGE PLAN 1. Collect the following items: (1) D/C SHT. 6711 BALSA PT. # 3670 CONTAINS: (4) ELEVATOR AIR BALANCE L.E. (2) RUDDER BOTTOM (2) RUDDER TOP (1) D/C SHT. 6712 PLY PT. #3671 CONTAINS ROUNDING TOOL (1) D/C SHT. 6727 BALSA PT. #3657 CONTAINS: (1) STAB JOINER (4) ELEVATOR HORN MOUNT (1) D/C SHT. 6723 PLY PT. #3697 CONTAINS BEVEL TOOL (1) D/C SHT. 6710 PLY PT. #3669 CONTAINS: (2) STAB JOINER DOUBLER (3) TRUSSING STICKS PT.
ELEVATOR 1/4 x 5/16 x 16" 1/4 x 5/16x24" 5. Trim the STAB LEADING EDGES and TIPS to fit. 1. Laminate the two sets of ELEVATOR AIR BALANCE L.E.s and ELEVATOR HORN MOUNTS. Pin in place and glue. 2. Place waxed paper over the elevator portion of the plan. 1/8 x 1/4 x 20" 6. Trim and glue the TRUSSING in place. 5/64” BALSA 3. Working over the plan, glue and pin the ELEVATOR AIR BALANCE L.E.s and the ELEVATOR HORN MOUNTS in place. 7. Trimming as needed, prefit the SHEETING onto the stab.
5. Trim and glue the 3/16 x 3/8” TRUSS STICKS. 1/2" 1/2" ELEVATOR GUSSET 6. From scrap 3/16” balsa, cut a piece 1/2”x 1/2” triangle to form a gusset. 2. Trim the SHEETING to fit the fin framework. When satisfied with the fit, glue in place. Glue in place, as shown. Turn the fin over and sheet the other side of the fin structure. VERTICAL FIN NOTE: When covering the fin, DO NOT cover posts and bottom where the structure is to be glued to the fuse.
HINGING AND ROUNDING AIR BALANCE 5/64" BALSA SPACER MARK 1. Referring to the plans, mark the hinge locations onto the elevator. 2. Fit the stab and the elevator together and, use balsa sheeting scrap to make a 5/64” spacer between the elevator air balance and the stab. 2. Working over the rudder portion of the plan, place the laminated RUDDER TOP over the plan and trim, if needed. When satisfied with the fit pin in place. Then, transfer the hinge locations from the elevator to the stab.
LIKE THIS 8. Using the tool marked “T,” bevel the rudder L.E. and the elevator L.E. to a point at the scribed centerline. Use a knife to bevel near the air balances, as the tool cannot get into the corner. 9. Temporarily hinge the rudder/fin assembly and the elevator/stab assembly, in order to check the alignment and round the perimeter of the assembles. You may wish to use masking tape to help hold the pieces together. SLOT HINGE 5. Use a knife to make an slot on on the centerline for each hinge.
WING CONSTRUCTION 1. Gather the parts needed to construct the wing: (2) D/C SHT. 6725 5/64” BALSA PT. # 3656 CONTAINS WING RIB #3 (2) D/C SHT. 6714 5/64” BALSA PT. #3688 CONTAINS WING RIB #4 & #5 (2) D/C SHT. 6715 5/64” BALSA PT. #3689 CONTAINS: WING RIB #6 & 7, AND AILERON RIB (2) D/C SHT. 6716 5/64” BALSA PT. #3690 CONTAINS: WING RIB #8, #9, #10, AND AILERON RIB (1) L/C SHT. 6732 PLY PT. #3652 CONTAINS: WING JOINER FRONT WING JOINER REAR, WING DOWEL SCAB PLATE (1) L/C SHT. 6730 BALSA PT.
WING RIGHT LEFT PLAN T.E. SHEET MATCH ARROWS TRIM 4. Pin a T.E. sheet over the plan. 2. Cut the plan along the dotted line. Align a straight-edge with the wing centerline and trim the sheet even with the centerline. Position the left wing plan over the right wing plan, aligning the arrows and main spar lines, as shown. MARKS Pin or tape the plan to the building board and place a sheet of waxed paper over the entire wing plan.
TAPE BOTH SIDES T.E. BACK-UP 7. Tape both sides of the tab break-off line on all of the tabbed ribs. Cut off the back-up flush with the wing centerline. RIB SPACING GAUGE PLAN CENTERLINE 11. Use the Plan to locate the distance between Rib #3 and and Rib #2. NOTE: Because the plan paper can stretch somewhat, due to variations in humidity, the plan is not always an accurate representation of the desired results.
RIB #3 RIB #4 STARTING HERE WING TIP 13. Using the wing-tip side of Rib #4 as a guide, cut through the trailing edge sheeting. 17. Using the long side of the rib spacing gauge, locate ribs #5 through #9, gluing each of them to the T.E. sheet. RIB #3 NOTE: Make sure that the ribs are parallel to the ribs on the plan, before gluing. RIB #4 RIB SPACING GAUGE AFT SPAR WING TIP 14. Cut a 1/8 x 1/4” balsa aft spar to a 10-3/4” length and butt one end against Rib #4. CUT Glue to the T.E.
TRIM 1/8 x 1/4 x36" BALSA REAR AFT SPAR STARTING HERE 19. Using Rib #10 as a guide, cut through the T.E. sheeting along the wing center side of the rib. 21. Trim the rear aft spar to fit and glue to the ribs. 5/64" SCRAP AILERON RIB Again using the 5/64” scrap spacer, locate and glue the aileron rib to the trailing edge sheeting. MAIN SPAR FORWARD AFT SPAR 22. Position the SHAPED LEADING EDGE on the wing centerline and then glue the L.E. to each rib. WING CENTERLINE 20.
FLUSH WITH T.E. T.E. SHEETING SLIDE ON CENTERLINE 27. Making sure the servo wire knock-out hole is on the piece closest o the L.E., glue the three large pieces of CENTER SHEETING to the ribs, the L.E. and the T.E.. 24. Glue the top T.E. SHEETING to the spars, ribs, and the bottom T.E. sheet. Pre-fit a wedge-shaped piece of sheeting to fill the center area. 3-7/8" When satisfied with the fit, apply glue and slide the piece into place, as shown. L.E. SHEETING 5-3/8" 25.
WING IS BOTTOM-SIDE UP 32. Place the wing panels onto the fixtures with the bottom (open framework) facing up. 29. Trim and then glue the WING TIP SHEETING and the 5/64” balsa capstrips in place. Check the centerline fit and, if necessary, sand to improve fit. When satisfied with the fit, you may wish to anchor in place with pins and rubber bands, as shown. THIS COMPLETES THE RIGHT WING HALF. SET IT ASIDE AND PLACE THE LEFT WING HALF OF THE PLAN IN THE CENTER OF THE BUILDING BOARD.
FRONT WING JOINER 38. Test fit the L.E. sheeting. When satisfied with the fit, apply glue to the top of the L.E., the front rib tops, and the top of the main spar. 35. Test fit the front and rear WING JOINERS between the two #2 ribs, as shown. Note the rear joiner tabs which fit into the rib slots. Install the sheeting and pin in place, as shown. Allow to dry thoroughly. Sand any parts, as necessary, to improve the fit of the two wing halves. 36.
Take the second center rib and repeat the above lamination, taking care to make a right center rib and a left center rib. 41. Laminate the two center ribs together, creating a single four-ply center rib with the doublers facing the wing tips. AILERON SERVO CUT-OUT WING TIP 45. Temporarily mount the servo, and mark the AILERON SERVO COVER SHEETING accordingly. WING TIP Make a cut-out for the servo. 42.
Using first medium grit, and then fine, sandpaper, sand the both wing tips to a rounded and tapered final shape. STRAIGHT-EDGE 49. Finish sand the entire wing surface, top and bottom. WORK IN A WELLVENTILATED AREA! REMOVE STRIPS OF SHEETING 2. Using a straight-edge, remove a strip of sheeting between the two aft spars, as shown. 50.
AILERON BEVEL GAUGE HINGE SHEETING 8. Using the previously constructed Bevel Tool “A”, bevel both sides of the ailerons. Test fit the ailerons to the wing, but do not permanently install until after they have been covered. 5. Trim to fit and then glue a 1/4” balsa HINGE SHEETING onto both the ailerons and the wing. NOTE: MAKE SURE YOU CAN IDENTIFY THE LEFT AND THE RIGHT AILERON. YOU WILL NEED TO SCREW THE CONTROL HORN INTO THE PLY BACKUP LOCATED INSIDE.
FUSELAGE CONSTRUCTION (1) L/C SHT. 6732 LITE PLY CONTAINS: (1) FORMER B (1) FORMER B2 (1) LANDING GEAR PLATE (1) WING MOUNTING BLOCK 7/16" TAPER x 5-1/8" BASS (1) FRONT TOP SHEET 1/32 x 8 x 9-1/2" BIRCH PLY (3) GUSSET 1/2" TRI x 8" BALSA (1) .078 x 13-5/8” THREADED ROD (2) ENGINE MOUNT (6) 6-32 BLIND NUTS (2) 6-32 x 1" SOCKET HEAD SCREW (2) #6 FLAT WASHER (2) #6 x 3/4" O.D. FLAT WASHER (1) FUSELAGE PLAN 1. Gather the parts needed to construct the fuselage. (2) D/C SHT.6728 LITE PLY PT. #3655 FUSE.
Tape together and place under a weight until dry. TWO SERVO OPTION NOTE: Flying the Sukhoi with one of the larger recommended engines will produce spectacular results. However, these larger 4-stroke engines generate a lot of vibration. Therefore, you may wish to install two elevator servos. If you choose this option, refer to the following instructions. FORMER J PLY DOUBLER 1/2 ENGINE WIDTH ALIGN MARKS SERVO CUT-OUT 3.
ALIGN ALIGN 9. Invert the fuse and slide the BOTTOM AFT and the LANDING GEAR COVER PLATE into the notches provided. Again, DO NOT GLUE. 5. Lay the FUSELAGE SIDES on a flat surface side-by-side, in a mirror-image configuration. This will ensure that you build a left and a right fuselage side. Aligning the front and rear points for correct positioning, glue a WING SADDLE DOUBLER to each fuse side. TAPE IN PLACE 6.
the slotted locations between Former B and Former B2. The assemblies without the tabs go along the fuse sides. Epoxy securely in place. UNTABBED DOUBLERS GLUE ALL SEAMS 11. When the fuselage is perfectly aligned, glue all of the areas where the sides, top, bottom, and formers join. L.G. PLATE HOLE IS CENTERED 15. Epoxy the 1/4 x 2-1/4 x 5-11/16” ply landing gear plate between the fuse sides and into landing gear doublers. Now get the wing, which will be needed for the next few steps. 12.
Make sure the holes are aligned. Then, taking care to not get glue in the hole or on the screw, apply CA glue to the bottom of the wing bolt pad and glue to the wing. WING DOWEL SCAB PLATE NOTE: Brush On™ Super Jet is excellent for this job. Being careful not to get glue on the dowel, glue the WING DOWEL SCAB PLATE over the wing dowel and to the front side of Former B2. Glue the LANDING GEAR COVER PLATE in position. NO LARGER THAN 7/64" 21.
JET MODEL MATE FILLER Bevel-sand the plywood edge at the fuselage overlap. Fill the joint area with JET MODEL MATE™ and sand smooth. 24. Trim and glue the remaining firewall gussets in place, as shown. FORMER D FORMER E DIRECTLY ABOVE 27. Glue FORMER J directly over FORMER H. STABILIZER 25. Glue FORMER D and FORMER E into the notches in the fuselage top. MATCH THE CENTERLINES FUSLAGE 28. Mark the centerline onto the horizontal stabilizer and onto the stab platform on the fuselage.
SLOWLY wrap the plywood around the formers and down onto the fuselage sides. Check the fit and trim, if necessary. LIKE THIS NOT LIKE THIS Before the glue has set and with the fuse sitting flat on the work surface, check to make certain the stab is parallel to the building board. EQUAL OVERLAP 31. When satisfied with the fit, apply glue to the formers, fuselage, fin and stab. 29. Insert the vertical fin L.E. into the slot in Former J and slide the rudder post into the fuselage.
FINISHING THE MODEL CANOPY INSTALLATION 1. You will need the canopy and paint or covering. FUEL TANK TRAY 2. Cover the cockpit interior with black or gray iron on film or paint, as preferred. 2. Rubber band the foam pad and the fuel tank to the tank tray. 3. Thread the fuel line through the “V” notch in the firewall and attach them to the tank. Pull the line forward and glue the tank assembly onto the locating shoulders on Former A and Former B, inside the fuselage.
CONTROL SURFACE/RADIO INSTALLATION ENGINE PUSHROD INSTALLATION 1. Gather the necessary parts. 1. If you did not do so immediately after covering the model, thin CA glue the hinges in place, permanently attaching the elevator to the stab and the rudder to the fin. (4) (4) (1) (1) (2) (2) (1) (4) Permanently install the ailerons on the wings. 2.
AILERON SERVO CONNECTION LANDING GEAR INSTALLATION 1. Collect the following items: (4) (2) (2) (2) (2) (2) 1. Collect the following items: #2 x 5/16" SHT. METAL SCREWS PT.#1086 .078 x 10" THREADED ROD PT.#1272 SNAP LINKS PT.#1405 LONG CONTROL HORNS PT.#1407 SERVOS NOT INCLUDED 18" SERVO EXTENSIONS NOT INCLUDED (1) (2) (4) (4) (2) (4) FORMED ALUMINUM GEAR PT.# 1367 THREADED AXLE PT.# 1369 #6 x 3/4” SHT. METAL SCREW PT. #1082 #6 WASHER PT. #1140 3-1/2" WHEEL (NOT INCLUDED) C.G.
position, attach and adjust the cables until the rudder is centered. SOLDER NOTE: Cables need only be tight enough to eliminate slack. 2. Solder a threaded coupler to one end of each cable. Lay the cable over the plan and cut to length. Solder a threaded coupler to the cut end of each cable. 3. Glue the hooded exits to the fuselage and thread the cable assemblies from the rudder servo opening to the control horns. 1/16" DRILL 2-56 x 3/4" SCREW 4.
Assembling The Engine Cowling & Belly Pan 33
SETTING CONTROL SURFACE TRAVEL Use the control surface travel gauges to correctly set up the surface deflections. The gauges provide you with two setting: a gentle response setting and a more aerobatic setting. Even if you are an experienced pilot, we encourage you to start out at the gentle setting and then move to the aerobatic mode after you become more familiar with the characteristics of this aircraft.
FLYING THE SUKHOI The CARL GOLDBERG PRODUCTS SU-26 probably flies more like its full-size cousin than any other kit on the market. We have designed it deliberately to make unlimited aerobatics practical for the average pilot. In fact, if you are comfortable with a low-wing sport aircraft, you should have no difficulty in being successful with the GOLDBERG SUKHOI. Take great care in building and setting up your aircraft and the SU-26 will reward you with many hours of exciting aerobatics.
COLOR SCHEME DECAL PLACEMENT AT BUILDER'S DISCRETION BLACK PAINTED CANOPY FRAME WHITE BRIGHT RED The following colors were used on the "show model" photographed for the kit box. Lighting and printing may alter the appearance of these colors on the box.
