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<div style="font-family:arial,helvetica;font-size:10pt;color:black"><blockquote style="border-left: 2px solid blue; padding-left: 3px;">Note that lighter pistons and connecting rods </blockquote></div>
<div> <font size="2">That's a BIG gain, it gets some of that recip/bending load out of the mains. <br>
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<div><font size="2">Glen</font><br>
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<div style="font-family:arial,helvetica;font-size:10pt;color:black">-----Original Message-----<br>
From: timmmurphh--- via Fot <fot@autox.team.net><br>
To: fot@autox.team.net<br>
Sent: Thu, May 21, 2020 7:07 pm<br>
Subject: [Fot] FW: Flywheel wt & crank harmonics -TR3/4<br>
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<div class="yiv2112036761MsoNormal"><b>From:</b> timmmurphh@gmail.com <timmmurphh@gmail.com> <br>
<b>Sent:</b> Thursday, May 21, 2020 6:06 PM<br>
<b>To:</b> 'TeriAnn J. Wakeman' <tjwakeman@gmail.com><br>
<b>Subject:</b> RE: [Fot] Flywheel wt & crank harmonics -TR3/4</div>
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<div class="yiv2112036761MsoNormal">The weight of the flywheel will definitely affect the harmonic frequency. The heavier the flywheel, the lower the harmonic frequency will be. The flywheel contributes a significant amount to the total rotating inertia due to its weight and that the weight is at greater radius than the other rotating masses. Inertia increases as the square of the radius. It is not a linear function of the radius.</div>
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<div class="yiv2112036761MsoNormal">An RPM of 5200 was mentioned as the harmonic resonance. I had always heard that it was more like 6300 RPM. I have never seen a calculation for it. It would be complex. Note that lighter pistons and connecting rods would tend to lower the harmonic frequency as they would reduce the inertia in the engine.</div>
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<div class="yiv2112036761MsoNormal">Tim Murphy</div>
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<div class="yiv2112036761MsoNormal"><b>From:</b> Fot <<a rel="nofollow" ymailto="mailto:fot-bounces@autox.team.net" target="_blank" href="mailto:fot-bounces@autox.team.net">fot-bounces@autox.team.net</a>> <b>On Behalf Of </b>TeriAnn J. Wakeman via Fot<br>
<b>Sent:</b> Thursday, May 21, 2020 2:44 PM<br>
<b>To:</b> FOT <<a rel="nofollow" ymailto="mailto:fot@autox.team.net" target="_blank" href="mailto:fot@autox.team.net">fot@autox.team.net</a>><br>
<b>Subject:</b> [Fot] Flywheel wt & crank harmonics -TR3/4</div>
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<div><span style="font-size:13.5pt;font-family:"Adobe Garamond", serif;">Something I have wondered about for years.</span></div>
<div><span style="font-size:13.5pt;font-family:"Adobe Garamond", serif;">Does the weight of the flywheel affect the RPM and intensity of harmonics inherent in a TR3/4 stock crank? I've never found an answer to that question.</span></div>
<div><span style="font-size:13.5pt;font-family:"Adobe Garamond", serif;">TeriAnn</span></div>
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