UMS 5-55 Petrol 

Are you still happy with your engine? I was fascinated by the sound and have just received one, but on closer inspection I am a little worried about the quality. The crankshaft of only 8mm seems very thin for a 22 ”propeller and then it is not long enough if you need to spin on.

buenas tardes quisiera saber como puedo obtener los planos de éste avión para construirlo gracias

Ask whether the engine is equipped with a fuel pump？