Wooa there guy....I think that YS makes exactly that. The engine has many positive attributes for pattern and everything else except maybe racing. It also has several nagatives, as is true with practically everything. Most people involved deeply in Pattern know these pros and cons and the ones that go the route of the YS are willing to accept the cons

The point Ed and I are driving to is not that the Syssa 180 will compete with the YS170...it can't at it's current state of development. The point is that for many applications (and you could argue that for as many as 80% probably) the Syssa is a pretty good alternative to glow 2 strokes and all other 4 strokes, and probably electric (much less costly).

Of all of these alternatives available, electric is perhaps the most versatile...the trade off is cost which is coming down a bit as batteries improve. Again, the point really is it's a good alternative

As far flying lightly, most pattern people don't know what a 50 cc class IMAC plane flies like and don't care. Ed and I do. Ed still flies large IMAC planes since he came from IMAC. If you ever flew a 2 meter thoroughbred, you wouldn't be making such comments

MattK