Bill, thanks for detailed post on the new 557's. Looking forward to trying them. Just noticed AMain show they are coming in on the 17th so still got a couple weeks to wait.
As you mentioned that the 557's are your best work and like everything, you improve on past efforts. Will there come to a point where you may put some of these improvements back into the 697/717 sizes to improve them even more? How much design improvement are the 557's over the 717's for example? Re-tooling would be the big cost I would expect to change what is already in production but something that just came to mind.
Something completely on a different tangent. I'm curious as how do these designs would hold up against full-size helis' running headspeeds around 350rpm. Obviously the big company's have really smart designers at their disposal but your designs seem radically different to what the big company's use. And I understand full-size heli's have completely different design requirements depending on their intended use, military vs civilian.
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