RE: PTE 50 I GAS ENGINE
This engine is a marriage of the old style DL 50cc top end, and reed assembly with a CRRC GP50R crankcase. Both of them use the same older version DL50 crankshaft, the crankshaft mains are NSK but nobody knows what is on the rod. It is a decent running engine, not as powerful as a DLE but it's also less $.
Both prototypes I received (the first one was a year ago) had problems ranging from loose parts inside the engine, to the piston hitting the crush ring, to peeling chrome in the cylinder. If they've worked out these problems it could be a acceptable engine choice for a toy airplane, state of the art, not even close, original design, lol. It has a nice looking prop hub and an iridium spark plug though.