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<P mce_keep="true">[quote user="Diesel"] <P><STRONG>GP7</STRONG></P> <P>There is a certain "whirr" sound I hear.  You can hear it when the prime mover revs up almost in sync.  Then the prime mover noise subsides and you can distinctively hear this sound whirr "down"  Is this the generator or prime mover?</P> <P>[/quote]</P> <P class=MsoNormal style="MARGIN: 0in 0in 0pt"><FONT face=verdana,geneva>I know exactly what you are referring to as the "whirr" sound of the GP7.<SPAN style="mso-spacerun: yes">  I would call it a whine sound.  </SPAN>I don’t know exactly what is making that sound, but it does not sound like the exhaust sound of the engine.<SPAN style="mso-spacerun: yes">  </SPAN>You can hear it as the throttle is opened several notches, and especially when the engine slows down after a full throttle is closed.<SPAN style="mso-spacerun: yes">  </SPAN>It is almost a musical note as if it were being played on an organ or music synthesizer.<SPAN style="mso-spacerun: yes">  </SPAN>And, as a musical chord, the sound is a distinctly minor sounding chord.<SPAN style="mso-spacerun: yes">  </SPAN></FONT></P><FONT face=verdana,geneva> <?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><o:p></o:p></FONT> <P class=MsoNormal style="MARGIN: 0in 0in 0pt"><FONT face=verdana,geneva>You can hear that whine sound with this GP9 at about 1.00 minutes, and again when he throttles down about 1.30 minutes.</FONT></P> <P class=MsoNormal style="MARGIN: 0in 0in 0pt" mce_keep="true"> </P> <P class=MsoNormal style="MARGIN: 0in 0in 0pt"><SPAN style="FONT-SIZE: 12pt; FONT-FAMILY: 'Times New Roman'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: EN-US; mso-bidi-language: AR-SA"><A href="http://www.youtube.com/watch?v=K1auERUXODs&feature=related" mce_href="http://www.youtube.com/watch?v=K1auERUXODs&feature=related"><FONT face=verdana,geneva color=#800080 size=2>http://www.youtube.com/watch?v=K1auERUXODs&feature=related</FONT></A></SPAN></P> <P><SPAN style="FONT-SIZE: 12pt; FONT-FAMILY: 'Times New Roman'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: EN-US; mso-bidi-language: AR-SA"><FONT face=verdana,geneva size=2>Here is another example:</FONT></SPAN></P> <P><SPAN style="FONT-SIZE: 12pt; FONT-FAMILY: 'Times New Roman'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: EN-US; mso-bidi-language: AR-SA"></SPAN><SPAN style="FONT-SIZE: 12pt; FONT-FAMILY: 'Times New Roman'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: EN-US; mso-bidi-language: AR-SA"><A href="http://www.youtube.com/watch?v=OE9aoGmj_2s&feature=related"><FONT face=verdana,geneva size=2>http://www.youtube.com/watch?v=OE9aoGmj_2s&feature=related</FONT></A></SPAN></P> <P><SPAN style="FONT-SIZE: 12pt; FONT-FAMILY: 'Times New Roman'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: EN-US; mso-bidi-language: AR-SA"><FONT face=verdana,geneva size=2>Interestingly, in the comments of this video, somebody asks the same question about the whine sound.</FONT></SPAN></P> <P><SPAN style="FONT-SIZE: 12pt; FONT-FAMILY: 'Times New Roman'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: EN-US; mso-bidi-language: AR-SA"><FONT face=Verdana size=2></FONT></SPAN> </P> <P><SPAN style="FONT-SIZE: 12pt; FONT-FAMILY: 'Times New Roman'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: EN-US; mso-bidi-language: AR-SA"><FONT face=Verdana size=2>Here is another great example of a GP7 making the whine:</FONT></SPAN></P> <P><SPAN style="FONT-SIZE: 12pt; FONT-FAMILY: 'Times New Roman'; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: EN-US; mso-bidi-language: AR-SA"><FONT face=Verdana size=2><A href="http://www.youtube.com/watch?v=Tzpswzslyt4&feature=related">http://www.youtube.com/watch?v=Tzpswzslyt4&feature=related</A></FONT></SPAN></P>
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