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Three year late from 2010 I decided to build an big high wing model airplane . The super cruiser piper cup with some modified in 3D view plan was been to choice . More light , strong material had been used to contruct this model airplane ;but the balsa wood is usually the good materiel to made its . The contruction of this aiplane is all balsa wooden air-frame; covered by thin light silver PVC . I thing this the bigest scale wooden R/C model airplane , with .55 helicopter ThunderTiger engine is the best high wing R/C which I can do ( try on ! ) .

Wing : Was an 1180 square inch and all wooden contructional wing .The wing- airfoil is NACA 3412 ..and this a two piece detachable wing . I used two .19 and .16 aluminium tube attached with the fuselage and fixed by six screw installe inside the fuselage . The two aileron system ( see pigures ) .are independable . Each control by one 3,5Kg servos , installed hide into the wing .The hinges of the aileron are three piece of x ray film and installed at the middle of the rear wing bar . More hole in the wing foil lamina was reduce more the total weight of the wing . All covered by silver color PVC

Fuselage :The main contruction of the fuselage is all wooden air-frame with fourt main bar 7/7 x 120 of eine hard wood ( see plan ) . The standing of nitro engine is alumium standing engine or hard wood standing deck fixed on two layer of plywood ( see pic ). Down 2 to 2.5 degree and 1,5-1,7 degree to the right of the engine axis are require .The fiberglass canopy and wide sufficement opening air intake had given a very good form and firm mouting (see pic ) .

The attachement of the wing to the fuselage is two .19 and .16 alluminum rod tube placed in front and rear and fixed easily by six screw in the fuselage .

Engine : You can use the engine from .52-.61. But I use the .55 Thunder Tiger helicopter nitro engine by the choise of high aircooled culase on the head of this engine . To augmente the power of this engine , I change the standard muffler by an new two exhaust tube muffler , and by this I can change the normal 12x6 by the 13x6 propeller which this has any trouble

Gear system : An aluminium tube renforced by 4mm steel wire and sprintable get this airplane on good sweet and safe landing ( see pic )

R/C system , servo & other link installation : Fourt 3,5kg-servo for elevator , aileron & one mini servo for throttle-valve . An 6,5kg servo was using for rudder and tail wheel . The battery are fixed in lower , middle of the fuselage and adjust for the CG ( Center of gravity ) at 28%-30% from the front of the wing cross section . The receiver was place on the highest of the fuselage nearby the CG and sticking on the base of a rubber foam-sheet for reduce the vibration of engine and the shock .

The rudder and elevator's rod are two 2/8 carbone rod tube ( a kind of tree usually to made the broom in VN ) with two 2/32 steel wire fixed at the end ( see pic ) . These are light , hard and had any trouble in working Rudder , elevator , aileron adjust & flying test : Up 2/3 and down 1/3 inch for elevator . Right 3/4 and lelf 3/4 for rudder and 1/2 inch for the aileron . On the first fly , reduce some in the angle-effect for the aileron an elevator and slight trim down on elevator ( on the first test flight ).

On a clear and calm sunday morning , I made my first flying test ......

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