Tower Hobbies Sbach Instruction Manual Download

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epoxy. Before the epoxy hardens, reinstall the wings back
onto the fuselage and position the tabs so the slotted holes

will be centered over the holes in the brackets. Momentarily

remove the wings to be sure there is no excess epoxy
around the tabs that would inadvertently stick the wing to
the fuselage. Reinstall the wings and immediately proceed
to the next step.

❏

8. Before the epoxy has hardened, fasten the tabs

with an M3 x 10 SHCS (socket-head cap screw) and M3

lock washers and fl at washers. Push the wings snugly to
the fuselage and allow the epoxy to fully harden before
removing the wings.

ASSEMBLE THE FUSELAGE

Installl the Horizontal Stabilizer

❏

1. If you haven’t yet done so, tighten the covering over

the fuselage and the tail surfaces. Be certain to seal the
bottom fuselage covering to the front of the former so the

covering cannot pull away.

❏

2. Test-fi t the elevators to the stabilizer with the hinges

and the joiner wire—you may insert T-pins through the
middle of any hinges that don’t remain centered.

❏

View the elevators from whatever perspective

necessary to see that they are aligned with each other. If
necessary, remove the joiner and lightly “tweak” with pliers
to align the elevators.

Summary of Contents for Sbach

Page 1: ...ol over the final assembly or material used for final assembly no liability shall be assumed nor accept ed for any damage resulting from the use by the user of the final user assem bled product By the act of using the user assembled product the user accepts all resulting liability If the buyer is not prepared to accept the liability associated with the use of this product the buyer is advised to r...

Page 2: ...manual RimFire 32 42 50 800 GPMG4700 APC 13 x 8 thin E prop APCQ3080 OR APC 14 x 7 thin E prop APCQ4045 Castle Creations Edge Lite 75 ESC CSEM1200 3300mAh 4000mAh 4S LiPo FlightPower 4S 3300mAh 25C FPWP2334 FlightPower 4S 3600mAh 50C FPWP5364 FlightPower 4S 3800mAh 30C FPWP3384 If setting the BEC voltage in the Castle Creations Edge Lite 75 ESC higher than the factory default 5 0V it is recommende...

Page 3: ...0 Coverite 21st Century Cover Sock COVR2702 KIT INSPECTION Before starting to build take an inventory of this kit to make sure it is complete and inspect the parts to make sure they are of acceptable quality If any parts are missing or are not of acceptable quality or if you need assistance with assembly contact Product Support When reporting defective or missing parts use the part names exactly a...

Page 4: ... this is easy to fix using the proper tools and techniques The best way to renew the covering job is with a covering iron with a protective cover sock not only to tighten the covering but also to thoroughly bond the covering to the wood underneath The preferred tool is a 21st Century cover iron with a cover sock set to about 300 F 150 C This translates to about 280 F 140 C measured on the surface ...

Page 5: ...ed with denatured alcohol 5 NOTE All machine thread screws that thread into metal hex nuts blind nuts wheel collars etc should be lightly wetted with threadlocker 6 NOTE The procedure for preparing the holes in wood for all wood screws is as follows A Drill the hole with the drill specified in the step B Install then remove the screw to form threads in the hole C Add a drop or two of thin CA to ha...

Page 6: ...rvo arm and the middle hole in the aileron horn This geometry should provide the correct 3D throw with the transmitter servo end points dialed to about 110 3 Prepare the other wing with the aileron servo the same way 4 Use 6 or 30 minute epoxy to glue the nylon alignment pins into both wings with approximately 1 4 6mm protruding from the wing 5 Test fit but do not glue the fiberglass wing tabs int...

Page 7: ...h the wings snugly to the fuselage and allow the epoxy to fully harden before removing the wings ASSEMBLE THE FUSELAGE Installl the Horizontal Stabilizer 1 If you haven t yet done so tighten the covering over the fuselage and the tail surfaces Be certain to seal the bottom fuselage covering to the front of the former so the covering cannot pull away 2 Test fit the elevators to the stabilizer with ...

Page 8: ...tab and carefully sand the stab saddle where necessary to align the stab with the wing 7 Now that the stab is level with the wing center the stab laterally by using a ruler to equalize the distance from both ends of the stab to the fuselage 8 Once centered stick T pins into the trailing edge of the stab on both sides of the fuselage to lock the trailing edge into place 9 Tie a loop around one end ...

Page 9: ...e ink and most of the covering on top of the stab are black you ll still be able to see the line indicating where the covering will be cut and removed in the next step 13 Cut the covering 1 32 1mm inside the lines you marked around the stab A hobby knife may be used if the blade is brand new and sharp so little pressure will be required for cutting but extreme care must be used to cut only through...

Page 10: ...luing in the stab Work quickly and efficiently because some 30 minute epoxies may harden faster than others and time flies when trying to work with precision you don t want the epoxy hardening up before you have the stab accurately aligned 3 Mix up approximately 1 4 oz of 30 minute epoxy Apply epoxy all the way around the stab saddle on both sides of the fuselage and to the top and bottom of the s...

Page 11: ...nd joiner wire with the hinges use the T pins if necessary to keep the hinges centered 4 Use a thin metal ruler or similar tool to push the joiner wire all the way into the elevators 5 Permanently glue in the hinges with four or five drops of thin CA on the top and bottom of all the hinges allow a few seconds between drops for the CA to fully wick into the hinges 6 Retrieve the 50mm threaded rod t...

Page 12: ... stabilizer fuselage with the hinges and permanently glue them in Hook up the Rudder and Elevators 1 Cut the included rudder pull pull line into two equal lengths 2 Loop one of the lines through the torque rod horn two or three times It may be easier to push the line through if you first wet the end with thin CA 3 Install a brass cable swage over both ends of the line Position the swage about 1 25...

Page 13: ... sure the lines are below the cross brace at the cockpit former as illustrated in the image at step 13 12 With the servo arm and one of the clevises connected to the servo and the servo powered and centered with the radio on attach the other end of one of the lines to the threaded coupler as shown with another swage use hemostats or pliers to lightly tension the line while positioning and squeezin...

Page 14: ...ng the location of the holes for the motor mounting screws If using a motor different than the recommended RimFire 32 use the cross marks and the circle on the firewall to align your motor and mark new holes 2 Drill 1 16 1 6mm pilot holes through the punch marks then enlarge the holes with a 5 32 4mm drill 3 Assemble then mount the motor with four M3 x 10 Phillips screws M3 lock washers and flat w...

Page 15: ...ive back hook and loop strips or other preferred method Guide the servo wires over and around the internal structure as needed so nothing interferes with the rudder pull pull lines 2 Position and secure the receiver antennas according to the receiver manufacturer s specifications For the Futaba receiver shown and Tactic the antennas are to be positioned 90 to each other Small pieces of plastic tub...

Page 16: ...l gear 5 Glue the nylon tail gear bushing into the bottom of the fuselage 6 Slide the tail gear clip and a small wheel collar over the tail gear wire then insert the assembly down into the bushing Align the clip swing the tail gear out of the way then drill 1 16 1 6mm holes through the bottom of the fuselage for the mounting screws 7 Use medium grit sandpaper to roughen the end of the axle portion...

Page 17: ...e fuselage 3 Install the cowl the spinner back plate propeller and prop nut to the motor Position the cowl so it accurately aligns with the spinner back plate with the desired spinner gap approximately 3 32 2 5mm If necessary use tape or an assistant to hold the cowl in alignment while marking the holes in the fingers onto the cowl Once aligned the cowl on our model stayed in place on its own 4 Re...

Page 18: ...Down 2 51mm 20 Up Down 1 1 4 32mm 17 Right Left 3D 2 1 2 64mm 40 Up Down 2 1 2 64mm 25 Up Down 2 1 2 64mm 37 Right Left 2 Use the programming in your transmitter and or move the pushrods to holes farther out or in on your servo arms and or the control horns to adjust the control throws as necessary 3 If using the 3D throws a high volume of negative exponential is desirable on 3D rates approximatel...

Page 19: ... opposite tip by sticking it to the outside or strategically concealing it inside the balsa tip An airplane that has been laterally balanced will track better in flight and maintain its heading better during maneuvers when the plane is climbing 3 This static lateral balance check will be a good starting point but performance in the air will be the final determining factor whether or not the model ...

Page 20: ...ressive and active you are with the throttle more throttle means shorter flight times Use a flight timer initially set to a conservative time 4 minutes for example When the timer sounds land Use a LiPo checker shown above to measure the resting unloaded voltage when you land The voltage should not be below 3 75V cell When you charge the battery also note how much capacity it took to recharge indic...

Page 21: ...ge Check Don t forget to perform your usual ground range checks as written in the instruction manual that came with your radio system to be certain it is operating correctly AMA SAFETY CODE excerpts Read and abide by the following excerpts from the Academy of Model Aeronautics Safety Code For the complete Safety Code refer to Model Aviation magazine the AMA web site or the Code that came with your...

Page 22: ... miles of any pre existing flying site except in accordance with the frequency sharing agreement listed in the complete AMA Safety Code 9 Under no circumstances may a pilot or other person touch a powered model in flight nor should any part of the model other than the landing gear intentionally touch the ground except while landing FLYING The Sbach has no bad flight characteristics or idiosyncrasi...

Page 23: ...Notes 23 ...

Page 24: ...TOWA2026 2017 Tower Hobbies A subsidiary of Hobbico Inc ...

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