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This the first time I had build and jet R/C airplane was powered by ducted fan electric DC engine .The origine airfoil of the Mig 15 is 2212 , the dehydral angle are - 2 degrees .I decide the NACA of my Mig 15 Fagot was as same 2212 . . More light , strong material had been used to contruct this model airplane ;but the balsa wood is usually the good materiel to made it. The contructions of this aiplane all are balsa wooden air-frame; covered by thin alumium solar film . The gears system ( see on the pic ) are tricyclic , fixed and sprintable .

Wing : Was an 995square inch and all wooden contructional wing .The wing- airfoil is NACA 2212 with wing sweep distance is 45cm and 35 degree wing sweep. The two aileron system ( see figures ) .are independable . Each control by one 2,5 Kg / cm2 servos , installed hiding into the wing .The hinges of the aileron are fourth 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 . . The flap are independable and control by two 2,5kg servos and can reach 45 geree at down position .All covered by alumium color solar film

Fuselage :The main contruction of the fuselage is all wooden air-frame with four main bar 6/6 x 120 of balsa hard wood ( see pic ) and had two layer . The inner layer is and long 120 mm tube laminated by one thin layer aluminum and conic at the end the exhaust pipe The standing of ducth fan an engine fixed to the fuselage by five long srewn . The outer layer is balsa wooden in forme the Mig 15 fuselage . The two wing are fixed to the fuselage by eight balsa wood renforce by hard wood rod . The rudder is fixed strong on fuselage

The ducted fan and motor : I use 105 mm ducted fan powered by one 1600W and 2100rpm/volt brushless DC motor, 120amp ESC with BEC 6v . Two 3 cell 2200mAh 45C Lipopolymer battery are intall parallelic under the fuselage can get it up 4400mAh for this aiplane . The motor be cooled by two aluminum air cooled plate ( see pic ) and the ESC was cooled by and mini fan ( see pic ) . That can reach 21.000 -22.000 rpm at full throtle and all can developed 2,2kg static thrust

Gear system : This is a fixed tricyclic gear ,all contruction are aluminum rod and tube ( see pic ) and this is the lightest sprintable gear i had made ( see pic ) . The nose gear was dirigable by an mini 2,5kg servos

R/C system , servo & other link installation : Four 2,5kg mini servo for elevator , rudder , aileron & one mini servo for nose gear . . The receiver and the ESC are intall fixed in high of the fuselage and adjust for the CG ( Center of gravity ) at 60%-65% from the front of the wing cross section . The receiver was place on the highest of the fuselage in the pilot copit

The rudder and elevator's rod are 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 on the effect-angle of 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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