GREAT PLANES Super Sportster 20, Instruction Book

Page 1: ...anufacturer s instructions concerning the use of this covering material Please read through this step by step instruction book before you start building so you will get an overall idea of the construc...

Page 2: ...wheel strut tab For tri cycle gear the third hinge should be near the bottom of the rudder Check the plans Relieve cut out the leading edge of the rudder for elevator joiner wire clearance Shape the r...

Page 3: ...NELS It is very important that you build a straight wing with no warps or twists or you will get some flying characteristics you didn t expect Be very careful when you align the ribs spars leading edg...

Page 4: ...he building shim see size below For the 20 and 60 size align the trailing edge to the top of the shim as shown in the drawing below Use waxed paper in between the shim and the trailing edge and pin th...

Page 5: ...lding board and check all the glue joints Add more glue if necessary Now remount the wing upside down reversing the trailing edge shim on your work surface 8 D PREPARE THE MAIN LANDING GEAR BLOCK Glue...

Page 6: ...balsa so foreign matter does not get into the wing Go to step 13 for the 20 size model 12 D 40 and 60 SIZE ONLY GLUE THE HARDWOOD HOLD DOWN PLATE AND BALSA FILLERS TO THE WING PANEL Add the maple win...

Page 7: ...om fit all four supports and glue them in place Use 1 4 scrap and make and glue the aileron filler piece Glue it to the inboard side of the wing tip Add filler pieces to the rear end of the wing tip t...

Page 8: ...torque rod arms The center trailing edge pieces for the 60 size model are balsa Cut a groove in the block for torque rod clearance 20 D GLUE THE CENTER TRAILING EDGE PIECES TO THE WING PANELS JOINING...

Page 9: ...piece of cloth and polyester resin or epoxy Sand the center section when dry Apply a second coat of resin or epoxy if necessary IMPORTANT Omitting this step will result in a wing fail ure during fligh...

Page 10: ...to the tank com partment Drill the hole for the throttle linkage about 1 4 from the top corner of the bulkhead left or right depending on your engine For tricycle gear mark and drill the hole for the...

Page 11: ...position of the balsa dash be tween 2 and 3 on the fuselage sides Bulkhead 2 in the 20 size is located 1 8 forward of the wing saddle opening to allow for the dowel jig 7 D DRILL PUSHROD EXIT HOLES M...

Page 12: ...D GLUE LEFT FUSELAGE SIDE TO BULKHEADS Align the fuselage side bulkhead assembly upside down over the top view of the plans Make sure the flat side is resting flat on the building board and that the...

Page 13: ...ners to clear the doubler as shown on the plans The deck base should butt up to bulkhead 3 Mark the location of formers 4 5 and 6 and pin the deck base to the plans Check the fit of the formers and gl...

Page 14: ...icycle gear glue the bottom hinge at the tail at this time Use the rudder as a guide to placement late glue glue both elevator and rudder housings in place except at bulkhead 3 This will be glued late...

Page 15: ...N REAR HOLD DOWN FOR AILERON TORQUE ROD CLEARANCE Align the fuselage over the wing and draw refer ence lines on the wing along both sides of the fuselage Mark the locations to be relieved on the rear...

Page 16: ...ition to determine the placement of the dash on the fuse side Glue the dash to the fuse sides Do not glue on the hood top yet Glue former 3A 3B to the fuselage at the rear of the cockpit on top of bul...

Page 17: ...con tour later 30 D SAND THE TOPS OF THE HOOD SIDE PIECES Sand the top of the hood side pieces flush with the top of the formers so the hood top will mate squarely 31 D GLUE ON THE HOOD TOP SAND THE...

Page 18: ...35 D ADD THE 1 8 x 1 4 STRINGERS Add the 1 8 x 1 4 balsa stringers by gluing them at 6A 6B first checking with a straight edge and then gluing to 5A 4A and 3A 3B 36 D PREPARE AND GLUE IN THE SIDE NOS...

Page 19: ...pinner backplate and locate the block accordingly When you are sure of the placement glue the crossgrain spinner filler block in place Sand the front of the nose if necessary Glue the ply spinner ring...

Page 20: ...gers Shaping and sanding is easy if you tack glue scraps of balsa the thickness of the stab and fin to the fuselage Trim the scrap even with the fuse sides and stringer line then tack glue the blocks...

Page 21: ...he work surface first The reference line should be parallel to the work surface Measure from this line down to the work surface at several points on both sides of the fuselage All the measure ments sh...

Page 22: ...so gives you the location of the 1 4 holes in bulkhead 2 You drill the wing holes first position the dowels and jig and then drill the holes in the bulkhead after the wing is in position Use the plan...

Page 23: ...edge piece and rear hold down in the fuselage Remove the wing Redrill the wing with a 13 64 drill for 10 32 bolt clearance Tap the holes in the fuselage hold down for 10 32 bolts with a 10 32 tap Bol...

Page 24: ...nt the servo as deep into the wing as you can to prevent interference with the other servos Install the threaded wire pushrods with Z bends at the servo Install the nylon swivels onto the the aileron...

Page 25: ...the edges of the wheel pants smooth An easy way to do this is to lay your sandpaper down on a flat surface and move the pants over the sand paper This way you are assured of a straight flat edge when...

Page 26: ...ctly NOTE See page 42 for balancing instructions 24 D CONNECT ALL LINKAGES PUSHRODS CONTROL SURFACES CHECK RADIO OPERATION AND SET THE THROWS Screw a nylon clevis onto the threaded end of each pushrod...

Page 27: ...s difficult to say exactly what the optimum engine size is for your Sportster The old rule of thumb was to choose a 4 cycle engine with 1 1 2 times the 2 cycle displacement for equivalent horsepower...

Page 28: ...of the engine on the Firewall and center the mount in position The thrust line of the engine should be in the same position as shown on your plan Drill holes and install blind nuts Temporarily instal...

Page 29: ...measure the backplate depth and add that distance to one of the above measurements depending on which model you are building Distance B length of your 4 cycle engine and mount SPORTSTER 20 B B B SPOR...

Page 30: ...Your A Move Firewall Back Step 5 Mark the new position of the Firewall on the inside of each Fuselage Side Make sure your line is perfectly parallel to the front of the fuse sides Using the firewall...

Page 31: ...om make 3 8 balsa nose side blocks as shown in Figure 5 Now follow step 36 in the first part of this book about gluing these side pieces to the fuselage Next if desired add a front bulkhead to the eng...

Page 32: ...ywheel weight from large diameter props This made the plane land a little faster than with the 11x6 The prop we used was a prop designed for 60 size pattern engines a Max Dailey Radio South propeller...

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Page 38: ...5 8 x 5 8 LG Gusset Hardwood Grooved 5 8 x 5 8 LG Block Hardwood Grooved 5 8 x 4 LG Block Plywood Shaped 1 16 LG Brace Plywood Shaped 1 16 Spinner Ring Plywood 1 4 x 3 4 x 2 5 8 Hold Down Plywood 1 8...

Page 39: ...haped 1 4 Elevator WIRES16 2 Threaded Pushrod Wire 16 SS40W07 1 Balsa Shaped 5 8 Wing Fairing SS40W08 1 Balsa 3 8x3 1 2x5 1 2 Wing Fairing SS40W09 1 Balsa Shaped Center Rib SS40W10 2 Balsa Shaped 3 16...

Page 40: ...AL116 BAL120 CANPY025 EM4070L EM4070R SS246P02 NYLON87 SS60F01 SS60F02 SS60F03 SS60F04 SS60F05 SS60F07 SS60F09 SS60F10 SS40F29 SS40W14 SS60F30 SS60P01 SS60R01 SS60R02 SS60R03 SS60R04 SS60S01 SS60S02 S...

Page 41: ...Use trim MonoKote and these letters to create your trim scheme on your Sportster 41...

Page 42: ...ace the airplane upside down on the balancing stand as shown in the sketch empty fuel tank Move the airplane forward or aft on the stand until it balances with the stab level If it balances outside th...

Page 43: ...PUSHROD LINKAGES 43...

Page 44: ...the model and fly it only with experienced competent help using common sense and in accordance with all safety standards as set down in the Academy of Model Aeronautics Safety Code It is suggested tha...