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Aerobeez 65″ Sbach 20cc Profile Step by Step Build Guide

Posted by aerobeez On September - 17 - 2014

Hello Aerobeez Pilots and welcome to our Aerobeez 20cc Sbach Profile installment of the Step by Step Build Guide series.  This build log will provide the steps that our team pilot, Pete, uses for this build.  You can cross reference with the included manual on the CD disc at anytime.  Also we will include Pete’s Pro Tips for certain steps that will help along the way.  Please keep in mind with this Sbach Profile, certain steps may be changed for your personal build preference and equipment used may vary as well.  So pilots and builders, let’s get started building!

Pete’s Tip: Throughout this Sbach profile build, you will be removing pieces of covering film from various areas of the aircraft.  Do not throw these cut out covering pieces away!  Save the covering you remove for any future possible patching.  Also, in the event you cut a wrong servo bay location, you can patch it with the covering cut outs.

IMG_0386

Step 1.1: Now locate and cut out the areas of covering on the fuselage.  These areas are running the servo wires from the wings to the interior of the fuselage and mounting holes for various parts.  Keep in mind as the build steps progress, you may miss a few holes at this step and it is just fine.  Once you reach the steps where other covering needs to be removed, you may do so at that time.  Due to the color of the covering being so dark, you can see Pete will line up the main wing to visually have an idea where the main wing holes will need to be cut.  Before cutting, please use your finger and press on the areas with some pressure and you can actually make an indention outline.  Use a sharp hobby knife and remove the covering.  (Be very careful as hobby blades are extremely sharp!)

Step 1 Sbach Profile Build

Step 1 Sbach Profile Build

 

Step 1 Sbach Profile Build

Step 1.2: Locate your main aluminum landing gear struts and remove the covering for the 2 holes to mount the gear.  At this time, we are not mounting the struts.  We are just cutting out the holes.

Step 1.2 Sbach Profile Build

Step 1.3: Locate your parts bag(s) containing your landing gear parts as seen in this photo.  Small paper plates are great for organizing the parts and keeping the steps organized.

Step 1.3 Sbach Profile Build

Step 1.4: Install the axles with one lock nut per wheel.

Step 1.4 Sbach Profile Build

Step 1.5: Install the wheels to the maid aluminum landing gear.  Use the provided small self tapping screws and secure the wheel pants to the gear.  Pete’s Tip: Before securing with the self tapping screws, you can swivel the wheel pant to line up with the main gear.  Once you are satisfied with the wheel pant position, secure with the screws.  No drilling is necessary.  The Self Tapping screws will screw directly into the wheel pant.

Step 1.5 Sbach Profile Build

Step 1.5 Sbach Profile Build

Step 1.6: Install the landing gears to the fuselage.

Step 1.6 Sbach Profile Build

Step 1.6 Sbach Profile Build

Step 1.7: Your Sbach is now standing on landing gears.  We start the build with installing the landing gears first because it makes the build much easier having a stable fuselage.

Step 1.7 Sbach Profile Build

Step 1.7 Sbach Profile Build

Step 2.1: Locate your tail wheel assembly and parts.  With the tail wheel wire spring area pressed up against the tail wheel bracket, mark the wire roughly 1″ up.  The distance may vary with how you would like your tail wheel mounted.  We suggest 1″.

Step 2.1 Sbach Profile Build

 

Step 2.1 Sbach Profile Build

 

Step 2.2: Bend the tail wire 90 degrees and clip off the long rod end.  The amount to be clipped off is personal preference.  We suggest leaving at least 1.5″ of rod.

 

Step 2.2 Sbach Profile Build

Step 2.3: Mark the rudder the area where the tail wheel rod will be inserted.

Step 2.3 Sbach Profile Build

Step 2.4: Drill a small pilot hole with 1/16 bit in the rudder on your mark.

Step 2.4 Sbach Profile Build

Step 2.5: Test fit the tail wheel assembly to the rudder.  Do not use any glue at this time.

Step 2.5 Sbach Profile Build

Step 2.6: Install the control surface hinges for the rudder.

Pete’s Tip: Put a single drop of house hold oil on to the pivot area for the control surface hinges. This will prevent the glue from adhering to the pivot area when we are gluing the hinges to the control surfaces. You can apply the oil to all the hinges at the same time or by the build step progression.  Pete will oil the hinges as he moves from step to step.  Not all at one sitting.  If you do not have any house hold oil, you can use a drop of cooking oil or even motor oil.

Step 2.6 Sbach Profile Build

Step 2.6 Sbach Profile Build

Step 2.7: Now, using epoxy, glue the hinges to the rudder.  Note: Please double check the pivot direction to prevent the hinge from being at the wrong angle.  Wait until the hinges are fully cured, we will NOT be gluing the rudder to the fuselage in the next steps!  Put the rudder aside and will come back at a later step to install the rudder.

Step 2.7 Sbach Profile Build

Step 2.8: Remove the area of wood in this step with a hobby knife.

Step 2.8 Sbach Profile Build

 

Step 2.8 Sbach Profile Build

Step 2.9: Slide the horizontal stabilizer into the rear area of the fuselage through the area of wood you just removed.  Visually center the horizontal stabilizer the best you can. Next using a ruler, slowing measure both sides from the tip to the fuselage.  Measure both leading and trailing edges.  Move the horizontal stabilizer until both sides match very close in measurements or exactly.  You can cross reference at this time with the included CD disc for this step.  The CD contains more measuring options.  Pete finds the ruler measurement is plenty accurate.  It will be your personal preference if you choose to measure using a different method.

Step 2.9 Sbach Profile Build

Step 3.1: Use a small tip marker and mark the area on the horizontal stabilizer as close to the fuselage as possible.  Remember to mark both the top and bottom.  Remove the stabilizer from the fuselage.

Step 3.1 Sbach Profile Build

Step 3.1 Sbach Profile Build

 

 

Step 3.2: Use a sharp hobby knife and lightly “score” the covering along the lines you have made.  Be very careful not to cut with too much pressure.  We don’t want to cut into the wood.  When you have scored both the top and bottom of the stabilizer, carefully remove the covering.  Note: Do not score or cut the covering off at any time on your lap.  Use a flat surface and never cut with the blade in the direction of yourself.

 

Step 3.2 Sbach Profile Build

Step 3.2 Sbach Profile Build

Step 3.3: In this step we will glue the horizontal stabilizer to the fuselage.  Glue of choice will be Epoxy.  Use 5 minute if you are comfortable with the epoxy set time.  10 minute or longer epoxy set time is best.  Give yourself some time to be able to move the stabilizer around to best line up the measurements.

Step 3.3 Sbach Profile Build

Step 3.4: Check the control surface horns at this time.  There may or may not be a clear plastic layer on the surface horns.  If you see a clear film like cover on the horn, be sure to remove the film before continuing.

Step 3.4 Sbach Profile Build

Step 3.5: Using sandpaper or a electric rotary tool, lightly scuff the surface horn.  This will provide for the strongest adhesion to the control surface.

Step 3.5 Sbach Profile Build

Step 3.6: Remove the covering from the slots for the rudder and elevator surface horns.  Use the same finger press method to locate the slots.  (The elevator servo and horn will be mounted on the right side of the fuselage.  Rudder servo and horn will be located on the left side. )

Step 3.6 Sbach Profile Build

Step 3.6 Sbach Profile Build

Step 3.7: First test fit the horns to the surfaces.  Once you are satisfied with the fit, glue the surface horn to the elevator and rudder.

Step 3.7 Sbach Profile Build

Step 3.7 Sbach Profile Build

 

Step 3.8: Glue the hinges to the elevator.  When the glue has cured, First step is to glue to elevator to the horizontal stabilizer. Second is to now glue the rudder to the vertical stabilizer.

Step 3.8 Sbach Profile Build

Step 3.9: When the rudder install has fully cured, using the provided self tapping screws, mount the tail wheel bracket to the bottom area of the tail section.

Step 3.9 Sbach Profile Build

Step 3.10:  Your Sbach tail section is complete.  It will be your personal preference at this time if you choose to jump steps and install the servos to the tail section.

Step 3.10 Sbach Profile Build

Step 3.10 Sbach Profile Build

Step 4.1:  Remove the covering from the slots to strap down the fuel tank and ignition to the side of the fuselage.  4 Slots on each side.

Step 4.1 Sbach Profile Build

0342, (skip 0343), 0344, 0345- E, skipping these for now and will come back to them.

Step 4.2: There are a couple of ways to secure your fuel tank and ignition to the fuselage.  You can use velcro straps or long zip ties.

Pete’s Pro Tip: when using zip ties, use a pair of needle nose pliers and wind the tip of the zip tie around the tip of the needle nose pliers.  This will create a coil effect making it much easier to run the zip tie between the slots in the next step.

Step 4.2 Sbach Profile Build

Step 4.3: Run the zip ties through the slots.  Pete’s Tip is to use a strip of velcro between the fuselage and fuel tank.

Step 4.3 Sbach Profile Build

Step 4.4:  Although a fuel tank is included in this Sbach profile, we chose to use the 4titude 8oz fuel tank.  Mount your fuel tank of choice and tighten the zip ties.

Pete’s Pro Tip: Never cut the zip tie tag end flush with the zip tie lock end.  Leave a small tag area.  This will give you some material on the zip tie in the event you need to increase the strap strength.  You can grab the tag end with a pair of pliers.

Step 4.4 Sbach Profile Build

Step 4.5: The engine mount area has been pre-drilled for you to fit a DLE20 engine.  Triangular wood stock has also been installed for strength and the engine area has been fuel proofed.  The wood has been cut to fit the DLE20 side exhaust.  Your motor will be mounted to the right side of the fuselage.

Step 4.5 Sbach Profile Build

Step 4.5 Sbach Profile Build

Step 4.5 Sbach Profile Build

Step 4.6: Test fit your DLE20 to the motor mount.

Step 4.6 Sbach Profile Build

Step 4.7: Be sure to use the included flat washers for the engine mount bolts on the left side before the lock nuts.

Step 4.7 Sbach Profile Build

Step 4.8: Secure the engine to the mount.  The Engine bolts should use a 3mm allen driver and the lock nut uses a 7mm socket.

Step 4.8 Sbach Profile Build

Step 5.1: Secure the ignition:

Pete’s Pro Tip: When securing the engine ignition.  Try to use a block of foam between the fuselage and the ignition.  The constant vibration may cause problems to your ignition if it is mounted directly to the fuselage. Repeat the same process with the zip ties as for the fuel tank.  Pull tight and secure the ignition.

Step 5.1 Sbach Profile Build

Step 5.1 Sbach Profile Build

Step 5.1 Sbach Profile Build

Step 5.2: Install your exhaust.

Step 5.2 Sbach Profile Build

 

Step 5.3: Locate and remove the covering for the throttle servo.

Step 5.3 Sbach Profile Build

Step 5.4: Test fit the throttle servo.

Step 5.4 Sbach Profile Build

Step 5.5: Dril holes for servo screws.

Pete’s Pro Tip: Use a 1/16 drill bit to first drill pilot holes for the servo screws.  This step is not a must.  The self tapping screws from your servo of choice would work without drilling pilot holes.  Be sure to have the servo mounting grommets and the grommet metal retainer inserted before drilling the hole.  If you choose to drill pilot holes, it is best to ad a drop of CA to each hole.  Let it completely cure before installing the servo screws.

Step 5.5 Sbach Profile Build

Step 5.6: Secure your throttle servo and connect your throttle pushrod to the carburetor.

Step 5.6 Sbach Profile Build

Step 6.1: Install the elevator servo and pushrod.  Note: The pushrod threads are in Reverse direction on one side.  This allows for pushrod length adjustment without disconnecting the push rod by turning the center area of the push rod.

Step 6.1 Sbach Profile Build

Step 6.1 Sbach Profile Build

Step 6.2: Locate the servo bay for the rudder.  Remove the covering and install the rudder servo and pushrod.  Pete’s Pro Tip:  When setting up your radio system and push rod lengths, use a piece of blue masking tape and tape the control surface to the main surface.  This will give you the best push rod length prior to making further push rod adjustments.

Step 6.2 Sbach Profile Build

Step 6.2 Sbach Profile Build

Step 6.2 Sbach Profile Build

Step 6.3: Cut out the covering for the aileron servos from both wings.

Step 6.3 Sbach Profile Build

Step 6.4: This is a precautionary step and will be personal preference.  You can use thin CA and apply on the servo mounting wood areas.  The CA will absorb into the wood and allow for a stronger servo bay.

Step 6.4 Sbach Profile Build

Step 6.5: Install the aileron servos.  Pilot holes are a personal preference once again.

Step 6.5 Sbach Profile Build

Step 6.6:  Adjust and install the aileron pushrods.

Step 6.6 Sbach Profile Build

Step 6.6 Sbach Profile Build

Step 6.6 Sbach Profile Build

Step 7.1: Locate the main wing mount brackets.

Step 7.1 Sbach Profile Build

Step 7.2: These are the slotted areas where you will install the main wing mounting brackets.

Step 7.2 Sbach Profile Build

Step 7.2 Sbach Profile Build

Step 7.3: Use blue thread lock compound for the screws.  If you do not have thread lock, you can mount the brackets without using thread lock.  Be sure to check the screw after a few flights to make sure it has not come loose.

Step 7.3 Sbach Profile Build

Step 7.4: Main wing brackets installed and ready.

Step 7.4 Sbach Profile Build

Step 7.4 Sbach Profile Build

Step 7.4 Sbach Profile Build

Step 7.5:  There is one area in each wing for mounting of the switch and on board ignition and receiver batteries.  Locate and remove the covering for this area.  The next steps are going to vary from personal preference.  You can choose to mount the switch on either side and your own switch of choice.

Step 7.5 Sbach Profile Build

Step 7.5 Sbach Profile Build

Step 7.6: Use velcro and a strap to secure your battery or batteries of choice to the inside of the wing area below the wing hatch.

Step 7.6 Sbach Profile Build

Step 7.6 Sbach Profile Build

Step 8.1:  This is the area where you will access all of your servo wires and mount your receiver.

Step 8.1 Sbach Profile Build

Step 8.2: Locate your main wing bracket mount bolts.

Step 8.2 Sbach Profile Build

Step 8.3: Main wings mounted and secured to the fuselage.

Step 8.3 Sbach Profile Build

 

Step 8.4: Set your control surface throws to your flying preference.  Range test your radio system and test CG. For CG on this ARF measure the CG from the leading edge of wing root rib.  Adjust the battery pack location. For CG proper position should be at 27% MAC. This recommendation balance point is for your first flights. The CG can be moved around later to fit your personal taste. If you are not comfortable with the calculus involved you can use this online CG Calculator. Just plug in the simple measurements and the app does the calculus.

Note: Use Diagram below as a reference for manual calculation. 

cg-diagram

And now we are Ready to Fly!

Sbach 342 20cc Profile

Sbach 342 20cc Profile

Sbach 342 20cc Profile

Congratulations!  You are now complete with your Sbach Profile build!  Be sure to always perform a preflight check before all flights!  Check for proper control surface direction movement and range check your radio control system.  Happy Flying!

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