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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. It enables the pilot not only to exe-
cute maneuvers with exceptional precision, but allows him to invent new maneuvers, as well! We have so completely
captured the essence of this extraordinary, competition-worthy aircraft that any good sport flyer will be able to expe-
rience the thrill of true unlimited aerobatics with his GOLDBERG SUKHOI. IMPORTANT: When selecting a power
plant for your SU-26, do not put in a larger-than-recommended engine. This will cause undo stress to the airframe
and may result in structural failure. Remember, a bigger engine does not necessarily mean better performance.
A radio-controlled model is not a toy and is not intended for persons under 16 years old. Keep this kit out of the
reach of younger children, as it contains parts that could be dangerous. A radio-controlled model is capable of caus-
ing serious bodily injury and property damage. It is the buyer's responsibility to build this kit correctly and to proper-
ly install the motor, radio, and all other equipment. Test and fly the finished model only in the presence and with the
assistance of another experienced R/C flyer. The model must always be operated and flown using great care and
common sense, as well as in accordance with the safety standards of the Academy of Model Aeronautics (5151
Memorial Drive, Muncie, IN 47302, 1-800-435-9262). We suggest you join the AMA and become properly insured
prior to flying this model. Also, consult with the AMA or your local hobby dealer to find an experienced instructor in
your area. Per the Federal Communications Commission, you are required to use only those radio frequencies spec-
ified "for Model Aircraft."
Carl Goldberg Products takes pride in the care and attention given to the manufacture of components for its model airplane kits. The
company warrants replacement of any materials found to be defective for their intended use, prior to their use in construction of the air-
craft, provided the buyer requests such replacement within one year from the date of purchase and provided the defective part is
returned, if so requested by the company.
No other warranty, expressed or implied, is made by the company with respect to this kit. The buyer acknowledges and understands
that it is his responsibility to carefully construct a finished flying model airplane and to fly it safely. The buyer hereby assumes full respon-
sibility for the risk and all liability for personal or property damage or injury arising out of the buyer's use of the components of this kit.
WARNING! THIS IS NOT A TOY!
LIMITED WARRANTY
©Copyright 1993
Pt. #2097 2/03

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Summary of Contents for Sukhoi SU-26

  • Page 1 GOLDBERG SUKHOI. IMPORTANT: When selecting a power plant for your SU-26, do not put in a larger-than-recommended engine. This will cause undo stress to the airframe and may result in structural failure. Remember, a bigger engine does not necessarily mean better performance.
  • Page 2 ITEMS NEEDED TO COMPLETE THIS KIT TOOLS AND SUPPLIES REQUIRED FOR ASSEMBLY RADIO GUIDANCE SYSTEM (4 CHAN- MISCELLANEOUS RUBBER BANDS NEL MINIMUM REQUIRED) (INCLUDING #64) ENGINE .90 2-CYCLE OR 1.20 4-CYCLE ROLL OF WAXED PAPER (NO BIGGER!) SANDPAPER (ASSORTED GRITS, INCLUD- PROPELLER (SIZE DEPENDS ON ING COARSE (80), MEDIUM (150) AND ENGINE)
  • Page 3 Like a full-size airplane, the SUKHOI is built from basic structures (stabilizer, fin, wing, etc.), which are then IDENTIFYING PARTS assembled into the complete airplane.
  • Page 4 WOOD PARTS ABOUT THE WOOD IN THE KIT Be careful when removing parts (such as fuselage for- We strive to supply good quality materials in your kit. mers) from the laser-cut sheets. Long parts are fragile Wood parts are inspected with regard to the function until glued into a structural unit.
  • Page 5 RIB #3 RIB #4 RIB #5 D/C SHT. 6725 2 REQ’D D/C SHT. 6714 2 REQ’D AILERON RIB RIB #8 AILERON RIB RIB #9 RIB #6 RIB #7 RIB #10 D/C SHT. 6715 2 REQ’D D/C SHT. 6716 2 REQ’D TIP SHEET AILERON COVER SHEET RIB SPACER...
  • Page 6 TAIL CONSTRUCTION (10) LARGE FLEX POINT HINGE PT. #1449 1. Collect the following items: (1) WING PLAN PT. #2124 (1) D/C SHT. 6711 BALSA PT. # 3670 (1) FUSELAGE PLAN PT. #2123 CONTAINS: (4) ELEVATOR AIR BALANCE L.E. (2) RUDDER BOTTOM HORIZONTAL STABILIZER (2) RUDDER TOP (1) D/C SHT.
  • Page 7 ELEVATOR 1/4 x 5/16 x 16" 1/4 x 5/16x24" Trim the STAB LEADING EDGES and TIPS to fit. Laminate the two sets of ELEVATOR AIR BAL- Pin in place and glue. ANCE L.E.s and ELEVATOR HORN MOUNTS. Place waxed paper over the elevator portion of the plan.
  • Page 8 Trim and glue the 3/16 x 3/8” TRUSS STICKS. 1/2" 1/2" ELEVATOR GUSSET From scrap 3/16” balsa, cut a piece 1/2”x 1/2” Trim the SHEETING to fit the fin framework. triangle to form a gusset. When satisfied with the fit, glue in place. Glue in place, as shown.
  • Page 9 HINGING AND ROUNDING AIR BALANCE 5/64" BALSA SPACER MARK Referring to the plans, mark the hinge locations onto the elevator. 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. Working over the rudder portion of the plan, Then, transfer the hinge locations from the ele- place the laminated RUDDER TOP over the...
  • Page 10 LIKE THIS 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. Temporarily hinge the rudder/fin assembly and the elevator/stab assembly, in order to check the alignment and round the perimeter of the SLOT...
  • Page 11 WING CONSTRUCTION Gather the parts needed to construct the wing: (2) WING CENTER SHEETING (2) D/C SHT. 6722 5/64” BALSA PT. #3695 (2) D/C SHT. 6725 5/64” BALSA PT. # 3656 CONTAINS: CONTAINS WING RIB #3 (2) WING TIP SHEETING (2) D/C SHT.
  • Page 12 WING RIGHT LEFT PLAN T.E. SHEET MATCH ARROWS TRIM Pin a T.E. sheet over the plan. 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.
  • Page 13 TAPE BOTH SIDES T.E. BACK-UP Tape both sides of the tab break-off line on all of the tabbed ribs. Cut off the back-up flush with the wing center- line. RIB SPACING GAUGE PLAN CENTERLINE Use the Plan to locate the distance between Rib #3 and and Rib #2.
  • Page 14 RIB #3 RIB #4 WING TIP STARTING HERE Using the wing-tip side of Rib #4 as a guide, cut through the trailing edge sheeting. Using the long side of the rib spacing gauge, locate ribs #5 through #9, gluing each of them to the T.E.
  • Page 15 TRIM 1/8 x 1/4 x36" BALSA REAR AFT SPAR STARTING HERE Using Rib #10 as a guide, cut through the T.E. sheeting along the wing center side of the rib. Trim the rear aft spar to fit and glue to the ribs. 5/64"...
  • Page 16 FLUSH WITH T.E. T.E. SHEETING SLIDE ON CENTERLINE Making sure the servo wire knock-out hole is on the piece closest o the L.E., glue the three large Glue the top T.E. SHEETING to the spars, ribs, pieces of CENTER SHEETING to the ribs, the and the bottom T.E.
  • Page 17 Assemble the DIHEDRAL FIXTURES, as shown. Note that one is offset. This fixture will not be needed in construction of this second edi- tion Sukhoi. "S" "S" "T" Test fit and then glue the MAIN SPARS to each wing rib.
  • Page 18 FRONT WING JOINER 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. Test fit the front and rear WING JOINERS between the two #2 ribs, as shown.
  • Page 19 Take the second center rib and repeat the above lamination, taking care to make a right center rib and a left center rib. Laminate the two center ribs together, creating a single four-ply center rib with the doublers facing AILERON SERVO CUT-OUT the wing tips.
  • Page 20 Using first medium grit, and then fine, sandpa- per, sand the both wing tips to a rounded and tapered final shape. STRAIGHT-EDGE Finish sand the entire wing surface, top and bot- tom. WORK IN A WELL- VENTILATED AREA! REMOVE STRIPS OF SHEETING Using a straight-edge, remove a strip of sheet- ing between the two aft spars, as shown.
  • Page 21 AILERON BEVEL GAUGE HINGE SHEETING Using the previously constructed Bevel Tool “A”, bevel both sides of the ailerons. Test fit the ailerons to the wing, but do not per- Trim to fit and then glue a 1/4” balsa HINGE manently install until after they have been SHEETING onto both the ailerons and the covered.
  • Page 22 FUSELAGE CONSTRUCTION 1. Gather the parts needed to construct the fuselage. (1) L/C SHT. 6732 LITE PLY PT. # 3652 CONTAINS: (1) FORMER B (2) D/C SHT.6728 LITE PLY PT. #3655 (1) FORMER B2 FUSE. SIDE/COWL SIDE SUPPORT (1) LANDING GEAR PLATE (1) D/C SHT.
  • Page 23 Tape together and place under a weight until TWO SERVO OPTION dry. 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.
  • Page 24 ALIGN ALIGN Invert the fuse and slide the BOTTOM AFT and the LANDING GEAR COVER PLATE into the Lay the FUSELAGE SIDES on a flat surface notches provided. Again, DO NOT GLUE. side-by-side, in a mirror-image configuration. This will ensure that you build a left and a right fuselage side.
  • Page 25 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 When the fuselage is perfectly aligned, glue all of the areas where the sides, top, bottom, and L.G.
  • Page 26 Make sure the holes are aligned. Then, taking WING DOWEL SCAB care to not get glue in the hole or on the PLATE screw, apply CA glue to the bottom of the wing bolt pad and glue to the wing. NOTE: Brush On™...
  • Page 27 JET MODEL MATE FILLER Bevel-sand the plywood edge at the fuselage overlap. Fill the joint area with JET MODEL MATE™ and sand smooth. Trim and glue the remaining firewall gussets in place, as shown. FORMER D FORMER E DIRECTLY ABOVE Glue FORMER J directly over FORMER H.
  • Page 28 SLOWLY wrap the plywood around the form- ers and down onto the fuselage sides. Check the fit and trim, if necessary. NOT LIKE THIS 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.
  • Page 29 FINISHING THE MODEL CANOPY INSTALLATION You will need the canopy and paint or covering. FUEL TANK TRAY Cover the cockpit interior with black or gray iron on film or paint, as preferred. Rubber band the foam pad and the fuel tank to the tank tray.
  • Page 30 CONTROL SURFACE/RADIO INSTALLATION ENGINE PUSHROD INSTALLATION 1. Gather the necessary parts. If you did not do so immediately after covering the model, thin CA glue the hinges in place, (4) 6-32 x 3/4" SOCKET HEAD SCREW PT.#1022 permanently attaching the elevator to the stab (4) #6 M.S.
  • Page 31: Landing Gear Installation

    NOTE Attach the control horns by screwing two #2 x The SUKHOI uses a pull-pull system. Therefore, the 3/8” screws into the plywood back-up inside rudder servo must be located as shown on the plan to the ailerons.
  • Page 32 position, attach and adjust the cables until the rudder is centered. SOLDER NOTE: Cables need only be tight enough to eliminate slack. 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.
  • Page 33 Assembling The Engine Cowling & Belly Pan...
  • Page 37 SETTING CONTROL SURFACE TRAVEL Use the control surface travel gauges to correctly set RUDDER GAUGE 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 3/8"...
  • Page 38 This take-off technique is not only best for REMINDER the SUKHOI, but is the proper way to take off any air- craft, particularly a tail-dragger. As good as this SUKHOI is, all aircraft have limita- tions and this one is no exception.
  • Page 39 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. Bright Red White Black...

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