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Old 08-28-2011, 12:51 PM
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Originally Posted by alanauer View Post
Thanks. Not to argue, just to learn...

I guess there's one plug-spark per engine rev (on a gasoline 4-stroke), but unless it's a direct-drive system, is it certain that there's one blade rev per engine rev?

"... full length sharpened blades ... aids in high speed high volume cutting quality" because there's less air resistance, because cutting takes place other than at the tip, or both?
No argument my friend.

Yes, some engines even fire every stroke, even if it's the power stroke or not. Tiny tach has them for both.

I'm not talking about blade RPM's, this is an engine tach. However most 60" ZTR's use a 1:1 engine to deck ratio. Without getting my calculator out other sizes increase blade speed ratio to maintain the max allowable blade tip speed.

I think it's both with regard to full length sharpening.
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