I don't think the comment about the piston engine is realistic.
However, if the engine, finally, does actually run at some point,
there will be significant share price appreciation from it's current, almost worthless, state.
One would think an update might be coming soon.
However, the history of this company is so poor, it's hard to be positive about them announcing anything meaningful.
I would love to be shocked.
News 
Market Data 
Discover 
