http://www.youtube.com/watch?v=YUy9GxpxzUw

http://www.youtube.com/watch?v=91B29tIIQZ8&feature=related

 These are new in box,not used. Roto 25 V                                     

              DISPLACEMENT              24.9 ccm      

    STATTICENGIN THRUST        6,6kg                                            

                                  BORE                  34mm                                       

                            RPM              1500 -7800   

                         WEIGH           1100 g/38.8 oz               

                    PROPELLER                  18/10           

Design details.

 Crankcase - Is roughcast before being machined on a CNC milling cutter, it is then powder coated.

 Cylinder - Made from a single piece of dural with a pressed liner made from mild-granular cast iron, it is then sharpened and honed to size.

Piston - Cast from silicon alloy with one piston ring. The Small end for the 8 mm gudgeon pin is honed to finish.

Conrod - Is forged, with two needle bearings pressed into the conrod.

 Crankshaft - Is a one-piece steel item, hardened, balanced to a high precision.

 Back-plate - Is a cast item, which is hardened, shaped and then rolled.

 Good news for pilots of .90-1.20-sized aircraft: the ROTO 25V/25cc gasoline engine is now available with electronic ignition.

Best regards,Shosho