SIG HUMMER RC-50, Building And Flying Instructions

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Page 14: ...ol so any radio with 2 or more channels may be used Special micro size radios are not required The prototypes used 2 functions of 4 and 6 channel radios The radio compartment is large enough for standard size battery packs and servos Recommended Glues The framework may be glued together using Sig Bond resin glue Sig Kwik Set epoxy and cyanoacrylate super glues With an airplane of this size it is i...

Page 15: ...dy extra long sanding block made from a 40 inch piece of aluminum channel with sandpaper glued to it that is particularly useful for jobs like truing up the leading edge and trailing edge of the wing core Cutting Out Printed Parts A jig saw is best for this job Cut just outside the lines leaving all of the black line on the part When fitting the part into place in the model use the sanding block t...

Page 16: ... exact position as it is lowered Also a piece of wax paper between the two parts will keep them from sticking together until you are sure they are accurately positioned then the paper can be slipped out and the parts pressed together The doubler on the prototype Hummer was glued on with Sig Kwik Set 5 minute epoxy and this is the method we recommend 3 Using a paddle spread a thin coat of epoxy on ...

Page 17: ... side over the top view of the plans 16 Epoxy glue the other side to F 2 and F 3 over the plans Check with a square before the glue sets up 17 Trim the 1 8 square balsa to a bevel at the rear of the fuselage so that the two side will join together as indicated on the plans 18 Pull the sides together using square weights pieces of scrap iron shown here and glue together 19 Put epoxy on both sides o...

Page 18: ... an exit hole for the nylon tubing push rod as indicated on the plans Insert the tubing but do not glue in place 26 a Place the elevator servo to be used in position b Insert the inner tubing into outer tubing and use this to align the outer tubing with the servo Glue the outer tubing in place with epoxy 27 Use a razor blade to cut the outer tubing off flush with the fuselage side 28 Use scrap 1 1...

Page 19: ...ace the landing gear over the plywood landing gear plate and drill the holes with a 3 32 drill bit 34 Recess the hole from the inside with a 7 64 drill bit This allows the stud of the blind nut to fit into the hole 35 Being careful not to get epoxy on the threads glue the 2 56 blind nuts in using epoxy glue Bolt the landing gear in place to pull the blind nuts into the wood HATCH CONSTRUCTION 36 a...

Page 20: ...balsa sheet 41 Measure 1 2 back from the rear end of the hatch top and mark a line at this point 42 Cut out the hatch top 43 Glue the other piece of 1 16 x1 2 x2 1 4 plywood to the rear of the hatch top a butt joint 44 Glue the hatch doubler to the hatch top Pictured is the completed hatch as viewed from the bottom TAIL ASSEMBLY 45 Cut out R I R 2 R 3 and the stabilizer from the 1 8 balsa printed ...

Page 21: ...e should be the same If they aren t trim the fuselage until the stabilizer is level b Cut slots in the stabilizer and elevator 1 8 x1 x12 balsa for the hinges as indicated on the plans Do not glue these in until after covering NOTE Some builders prefer to finish the tail pieces separately then glue on to the finished airplane If you wish to do so do not glue the tail on until after covering Be sur...

Page 22: ...t to the jig tab which will be removed later 62 Glue and pin the 3 16 square balsa top main spar in the rib notches 63 Glue and pin the 1 4 square balsa leading edge in place on the fronts of the ribs 64 Glue and pin 1 8 square balsa top front spar into the rib notches 65 Bevel the 1 8 square rear spar at an angle even with the top line of the ribs 66 Spread a coat of glue on the 1 8 square rear s...

Page 23: ...inish sheeting the center section in the same manner 74 Trim the spars and trailing edge sheeting flush with the rib at each wing tip 75 Use a sanding block to finish the wing tip rib 76 Cut the wing tips WT from the 1 8 balsa printed sheet Glue and pin in place 77 Use a sanding block to round the leading edge to airfoil shape 78 Sand the center section sheeting so that the sheeting is flush with ...

Page 24: ...e plastic tube of the aileron horns with a piece of sandpaper Epoxy glue the aileron horns into place Be sure that they are flush with the front of the piece and that there is no binding or friction caused by glue leakage into the bearing 85 Epoxy the assembly into place on the wing 86 Drill a hole into the aileron to accept the aileron horn 87 Groove the aileron to take the aileron horn wire then...

Page 25: ...he gluing process on the other side of each hinge After the glue has cured approximately three minutes the joint can be flexed You may notice a slight stiffness in the joint This can be eliminated by flexing the surface to full deflection each direction a couple of dozen times Don t worry about shortening the life of the hinge as they are almost indestructible 89 Place the wing into the fuselage w...

Page 26: ...d down Pre Flight Be certain to carefully range check your radio equipment and see how it operates with the engine running before attempting test flights A lot of problems can be avoided if the engine has been well broken in and the needle valve adjustment perfected on a test block or in another airplane before installation in the model The Balance Point position is shown on the side view drawing ...

Page 27: ...c 1980 SIG MANUFACTURING CO INC Montezuma Iowa 50171 0520 LIMIT OF LIABILITY In use of our products Sig Manufacturing 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 Page 14 of 14 Sig Hummer SIGRC50 Instruction ...