After I finished a Yak 52 paper model I thought that is a good ideea to transform it  to  a  flying foam model. So Ive started with  the  building  plans (page 1/page2), scaled for fitting a 1 m wingspan.

 

     Second  step  was to build the engine cowl. Actually  the  cowl fitted very well on a   2,5   liters   plastic  Pepsi  bottle,  so it wasn't  necesary  to  build  it from scratch but just to cut it with a small scissors.

 

     The  challenging  part was to take into consideration t he  thickness of the foam, because  in  the  original  plan  the model was made of paper.

 

      For  reinforcements  i've  used  3 mm balsa    spars    or    pannels   and  some aluminium foil.

      I've  made the landing gear mounts in such   a    way   to   allow   detaching   the landing   gear.  The  model  can  take  off from ground or lunched from hand.

Adding details on the model

    For  adding  details  on  the  model I've used    a   1,5   mm   needle   and   balsa pannels   which   I've   pressed   over  the depron.

 

     The   total  weight  of  the  RTF  model was around 650 grams.