After two and a half years of construction, it was time to get the beautiful model in the air. Gerhard Grambow is the proud owner and pilot of this unique piece. Model data: Scale: 1/2 (50%) Span: 4 m / 157.5" Weight: 24.6 kg / 54.5 pounds Engine: Armin De Vries UML300cc 5 cylinder 4 stroke rotary .