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Old 07-09-2009, 03:59 PM   #39 (permalink)
SixtyDriver
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Join Date: Dec 2006
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I know it sounds like alot and frankly guys don't pay attention to it because it's really just "nice to know" info. The swept tips add to the effect of the negative blade tip as well, sound reduction is a happy byproduct. It's worth mentioning the twist is non-linear, to take advantage of various aerodynamic and physical phenomena that frankly, I'll never understand. But yeah, the tips are usually flying at minus something in relation to the root.

By the way, the BO-105 has -8.5 at the tip.
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