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       R/C Model airplane page            -My RoyalSilver PiperCup 
                                                                          Create :  21 April 2007
      PIPER CUP      
  Wingspan : 63.5 inch ( 1600mm ) 
  Length      : 37 inch 
  Weight     :  1,95 - 2,2 lbs
  Engine : 0,15 - 0.19 or equal electric motor  
  Contruction  : All wood air frame & thin layer silver PVC covered
  Radio  :  4 channel
   Hither to this time ,  more light , strong material had been  used to contruct  the model airplane . But the light wood is usually the good materiel to make its . The contruction of this aiplane is all wooden air-frame;  covered by thin light yellow silver PVC  . I thing this is the bigest scale wooden R/C model airplane , with lowest power engine possible  which I can do ( try on ! )  . 

Wing : Was an  580 square inch  and  all wooden contructional wing .The wing- airfoil  is  NACA 4412  ..I use a1/8 alluminium wire , installe inside the wing , for the aileron system ( see plan ) . 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 .
Fuselage  :The main contruction of the fuselage is all wooden air-frame with two main bar 2/8 x 3/8 of light wood ( see plan )  . The standing of nitro engine is alumium standing engine or hard wood standing deck if your engine was brusless motor . Down 1-2 degree and 2-3 degree to the right of the engine axis are  require ( see plan ) .The fiberglass canopy had given a very good form and firm mouting (see pic ) .
    The attachement of the wing to the fuselage is  two 3/8 alluminum antenna tube  rod placed in front and rear and fixed easily by some rubbers rings .
  R/C system , servo & other  link installation : Three micro-servo for elevator , aileron & throttle-valve  . An mini 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 30% from the front of the wing cross section . The receiver was place below the cockpit ; all are covered  by rubber foam-sheet for reduce the vibration of engine and the shock .
 
  The rudder and elevator's rod are two 2/8 cane * body ( a kind of tree usually to made the broom in VN )  with two1/32 steel wire fixed at the end . 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 1/3 inch for the aileron . On the first fly , reduce some in the angle-effect for the aileron an elevator .
        On a clear and calm day , I  made my first flying test ......
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Add : Dr BUI BINH THO  35B Ho Hoa , To1  , Kp 1 , Tan Phong ,BIEN HOA , DONG NAI , VIET NAM            Email : buibinhtho52@gmail.com         

   Copyright © 2001: My homepage's Bui Binh Tho Md ,    35BHo Hoa, to1, Kp1, Tan Phong , BIEN HOA , DONG NAI , VIET NAM . Tel (0251) 8820217 , Mobile : 0903358597 . Plus ( +84 ) for all oversea relation . All Rights Reserved.    This document is strictly for informational, non-commercial purposes.