Cheers guys, engine is a west 50T1, throttle pipe and 13x4w prop. A few flights later i fractured the manifold on the pipe and lost it (was at about 500 feet at the time waiting for the engine to die to do a gide in landing). The engien was on its way out, needed new piston liner and bearings, it had no compression and the power was way down. Havent flown it since[] great great plane!