Specifications Wingspan 93 inches ( 2.36 m ) Length 82 inches ( 2.08 m ) Wing Area 1560 sq. inches Weight 22 – 23 Lbs ( 10.0 – 10.5 Kg ) Recommended Engine size - 60 to 80 cc gasoline – 35 to 60 cc glow engine . ( Not over 6 Lbs or 2.75 Kg weight ) Additional equipment required Computer Radio with at Least 8 channels...
Table of Contents Open and Inspect Preparation and Improvements Mount the Engine Hinge the control surfaces Mount the hatch and canopy Mount the horizontal tail plane Install control horns Install servos Install landing gear Install fuel tank and fuel system ** Fit radio equipment ** Hook up throttle control linkage ** Fit wings...
Open and Inspect contents This section should be fairly self explanatory. In the large box you should have a fuselage with hatch., wing tube and dual stab tubes, the elevator/stab assemblies, the rudder, cowl, wheel pants, canopy, and a package with the land- ing gear, tail wheel bracket and miscellaneous nuts and bolts.
Preparation and Improvements There are a few areas where, at this unassembled stage, you can improve the final results of your assembly project. There are many items that cannot be addressed on the assembly line due to cost and possibly because not every improvement would be welcomed by every builder.
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Install blind nuts from behind the firewall. Make a set of 3/4” square blocks that are thick enough to place the engine’s prop drive hub 6.5” from the firewall and use these to set the engine off from the firewall the proper distance. You can adjust the thickness to get an exact fit.
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If you are using a twin cylinder engine, it may be desirable to install a baffle inside the cowl to force air to flow over the engine instead of around it. This can be as simple as a piece of cardboard in the top of the cowl behind the engine.
Engine Firewall . Especially if you are using a Gas engine or not using a soft mount system, we strongly suggest adding some gussets to the firewall area. Always use Epoxy for engine mount structures due it’s superior strength. Add the 1/2'” triangle balsa stock or similar together with an extra plywood gusset as shown in the photo below.
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between surfaces. The hinge lines are beveled. The point of the bevel should be at the center of the hinge pin, this assures that the hinges are aligned and centered on the hinge line. Once you are certain that they all go together smoothly, take one surface and remove the hinges.
Mount the hatch and canopy The hatch mounts to the fuselage by two tabs on each side that are attached at the rear of the hatch. Set the hatch on the fuse and mark the fuselage so you can see where the fore and aft edges of the mounting tabs are.
Mount the horizontal tail plane Trim the covering around the holes in the fuse for the stab spar tube and the two retaining bolt holes on each side. You should also cut away the covering over the holes for the eleva- tor servos, but don’t cut out the rudder servo covering yet.
Install control horns Good quality heavy duty control horns must be used on these aircraft. You should decide whether you care if the screw head shows on the upper surface. The hard points are already pilot drilled, but need to be made larger for the 8-32 stud. I have found that grinding a small flat on one side of the tip of the 8-32 stud makes it thread into the hard point more easily.
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Rudder tiller; After the upper hard point has been drilled through with a 9/64 drill, install the tiller bar so that it is showing the same amount of threads on each side of the rudder. Once the stud is installed cut the head off with your Dremel. After the tiller bar is installed, if you need to adjust the position you can do this without damaging it by double-nutting two 8-32 nuts and use a wrench to turn the stud into the hard point.
Install servos 1. Elevator servos. Trim away the covering from the rear sides of the fuselage to expose the two servo trays. Attach a servo extension to the servo cord long enough to reach the receiver, and tie this servo connector together with dental floss or whatever you prefer. Slide the extension through the servo hole and fish the end through the fuse with a piece of wire with a hook or whatever you want to use.
Below the rudder servo trays in the tail there are two small slots. These are for the pull-pull cables. Please note that in building 2 prototypes and 2 production models, in every case the plane has balanced acceptably (more or less) without the rudder servos in the tail. Using a pull-pull is desirable unless you are using a heavier engine.
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There should be drilled holes in the landing gear plate under the covering, these should match up with the holes in the landing gear. Unfortunately the holes are not always there. To assure perfect alignment use the following procedure. If the holes are not there center the gear so the holes align with the aluminum bracket inside.
Steps 10, 11 & 12 Install fuel tank and fuel system – Mount the radio control equipment and throttle control. These 3 subjects are combined because this is the part where you get to do things your way. We have only done a few things to get you started. There are holes cut in both fuse sides that will fit any of the popular integrated switch/ charge jack assemblies.
aking pushrods that will withstand the forces involved in a large plane of this type is very simple once you see how it is done. If you have your own design, feel free to use it, but here’s one that is cheap and strong. You will need a length of 3/16”...
14 & 15. Check centre of gravity & Set control throws. Balance the plane. First flights should balance 1” in front of the center of the wing tube Note this is a change from the earlier 1 3/4” to 2” which was a very conservative setting. We balanced the plane on a dowel after first marking the balance point on the bottom of the fuselage.
Do not use the 3D settings until you are thoroughly familiar with the plane on low rates. High rate (3D) Low Standard/ initial rates Ailerons 20 deg 16 deg Elevators 40 deg. 13 deg. Rudder 45 deg. 25 deg. Fly the plane on low rates at first. At high 3D rates,it can be very difficult to fly these models Use switchable hi / lo rates and / or exponential settings in your transmitter to make control LESS sensitive around centre of control , for...
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Before installing rudder controls wait until the airplane is completed and check the balance. You can use pull-pull if little or no tail weight is needed, otherwise there are two servo mounts in the tail for rudder servos if the plane is nose heavy. You might want to re-glue the hatch hold downs to the hatch, they have been known to come loose.
the horizontal stab. Rudder servo trays are below the elevator servos. Don’t cut out the wrong one, and don’t cut out the rudder servo trays until you are sure you will be using tail-mounted servos. Slots for pull-pull cables are located below the rudder servo trays. Whichever aileron configuration you choose, cover the remaining unused servo tray(s) with Ultra coat.
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