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</o:shapelayout></xml><![endif]--></head><body lang=EN-AU link=blue vlink="#954F72"><div class=WordSection1><p class=MsoNormal><span style='font-family:"Times New Roman","serif"'>Hello Harold<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Times New Roman","serif"'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-family:"Times New Roman","serif"'>Thanks for your input.<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Times New Roman","serif"'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-family:"Times New Roman","serif"'>I know that at higher speeds an electric fan becomes superfluous, however my initial question did not concern the cooling of an Austin-Healey, but that of a Healey.<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Times New Roman","serif"'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-family:"Times New Roman","serif"'>Be that as it may, the cooling system of a Healey is I believe more efficient than that of an Austin-Healey, especially that of a six-cylinder. As an aside it’s interesting to look at the BMC part number for a radiator for a six-cylinder Austin-Healey. There was no change in the part number whether it was for a 100/6 engine producing 102bhp right through to the BJ8 producing 141bhp. The only thing that was different was the radiator pressure cap that gradually increased with the corresponding increase in bhp.<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Times New Roman","serif"'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-family:"Times New Roman","serif"'>In other words BMC engineers really didn’t give much consideration to an improvement in engine cooling especially for warmer climates, fan blades excepted.<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Times New Roman","serif"'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-family:"Times New Roman","serif"'>Hoo Roo<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Times New Roman","serif"'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-family:"Times New Roman","serif"'>Patrick Quinn<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Times New Roman","serif"'><o:p> </o:p></span></p><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal><b><span lang=EN-US style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span lang=EN-US style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> Harold Manifold [mailto:manifold@telus.net] <br><b>Sent:</b> Saturday, 25 January 2020 1:32 PM<br><b>To:</b> 'Perry'; warthodson@aol.com; p_cquinn@tpg.com.au<br><b>Subject:</b> RE: [Healeys] Curved/quiet or Straight/efficent<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif";color:blue'>Have a look at this article. BTW fans don't do much at speeds over 25 MPH.</span><span lang=EN-US style='font-size:12.0pt;font-family:"Times New Roman","serif"'><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:12.0pt;font-family:"Times New Roman","serif"'> <o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif";color:blue'><a href="https://www.verus-engineering.com/blog/informative-8/post/radiator-fans-in-depth-explanation-and-information-32">https://www.verus-engineering.com/blog/informative-8/post/radiator-fans-in-depth-explanation-and-information-32</a></span><span lang=EN-US style='font-size:12.0pt;font-family:"Times New Roman","serif"'><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:12.0pt;font-family:"Times New Roman","serif"'> <o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif";color:blue'>For the record I am of the belief that the Healey cooling system is marginal as a result of all of the key components being marginal: water pump, fan, radiator, thermostat, bypass system, pressure rating, etc. are all less than ideal. There is no magic solution and the best approach is to keep all of components in as good an operating condition as possible. Good performance by one component will likely not compensate for poor performance by one of more of the other components.</span><span lang=EN-US style='font-size:12.0pt;font-family:"Times New Roman","serif"'><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:12.0pt;font-family:"Times New Roman","serif"'> <o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif";color:blue'>Just my thoughts ... Harold</span><span lang=EN-US style='font-size:12.0pt;font-family:"Times New Roman","serif"'><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:12.0pt;font-family:"Times New Roman","serif"'> <o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:12.0pt;font-family:"Times New Roman","serif"'> <o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:12.0pt;font-family:"Times New Roman","serif"'><o:p> </o:p></span></p><div class=MsoNormal align=center style='text-align:center'><span lang=EN-US style='font-size:12.0pt;font-family:"Times New Roman","serif"'><hr size=3 width="100%" align=center></span></div><p class=MsoNormal style='margin-bottom:12.0pt'><b><span lang=EN-US style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span lang=EN-US style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> Healeys [mailto:healeys-bounces@autox.team.net] <b>On Behalf Of </b>Perry via Healeys<br><b>Sent:</b> Friday, January 24, 2020 3:16 PM<br><b>To:</b> warthodson@aol.com; p_cquinn@tpg.com.au<br><b>Cc:</b> healeys@autox.team.net<br><b>Subject:</b> Re: [Healeys] Curved/quiet or Straight/efficent</span><span lang=EN-US style='font-size:12.0pt;font-family:"Times New Roman","serif"'><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>Take a look at:<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><a href="https://www.hunker.com/13407187/how-to-calculate-cfm-from-rpms">https://www.hunker.com/13407187/how-to-calculate-cfm-from-rpms</a><o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>Perry<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>Sent from <a href="https://go.microsoft.com/fwlink/?LinkId=550986">Mail</a> for Windows 10<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><div style='border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal><b><span lang=EN-US>From: </span></b><span lang=EN-US><a href="mailto:warthodson@aol.com">warthodson@aol.com</a><br><b>Sent: </b>Friday, January 24, 2020 5:49 PM<br><b>To: </b><a href="mailto:healeyguy@aol.com">healeyguy@aol.com</a>; <a href="mailto:p_cquinn@tpg.com.au">p_cquinn@tpg.com.au</a><br><b>Cc: </b><a href="mailto:healeys@autox.team.net">healeys@autox.team.net</a><br><b>Subject: </b>Re: [Healeys] Curved/quiet or Straight/efficent<o:p></o:p></span></p></div><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><div><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'>I am confused by the terminology & illustrations on this site. <o:p></o:p></span></p><div><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'>Terminology: <o:p></o:p></span></p></div><div><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'>Pitch = angle of attack. An efficient fan/propeller blade usually has a higher pitch near the hub (center) than at the tip. A blade with a constant pitch is less efficient.<o:p></o:p></span></p></div><div><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'><o:p> </o:p></span></p></div><div><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'>Blade Camber is the equivalent of a wing airfoil. A flat blade = 0 camber is generally less efficient than a blade with a camber/ arch/airfoil. However, the camber has t be appropriate to the application. <o:p></o:p></span></p></div><div><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'><o:p> </o:p></span></p></div><div><p class=MsoNormal style='margin-bottom:12.0pt'><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'>Gary<o:p></o:p></span></p><div><p class=MsoNormal style='margin-bottom:12.0pt'><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'>-----Original Message-----<br>From: Perry via Healeys <healeys@autox.team.net><br>To: Patrick & Caroline Quinn <p_cquinn@tpg.com.au><br>Cc: healeys@autox.team.net <healeys@autox.team.net><br>Sent: Fri, Jan 24, 2020 4:11 pm<br>Subject: Re: [Healeys] Curved/quiet or Straight/efficent<o:p></o:p></span></p><div id=yiv4103211760><div><div><div><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'>Sir Patrick<o:p></o:p></span></p></div><div><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'>Please peruse the web site at: <a href="https://daviescraig.com.au/blog/straight-vs-curved-fan-blades-dispelling-the-myth" target="_blank">https://daviescraig.com.au/blog/straight-vs-curved-fan-blades-dispelling-the-myth</a><o:p></o:p></span></p></div><div><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'>They must have the best info on the globe since they are located down under! </span><span lang=EN-US style='font-size:10.0pt;font-family:"Segoe UI Symbol","sans-serif";color:black'>😊</span><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'><o:p></o:p></span></p></div><div><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'>Perry<o:p></o:p></span></p></div><div><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'> <o:p></o:p></span></p></div><div><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'> <o:p></o:p></span></p></div><div><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'>Sent from <a href="https://go.microsoft.com/fwlink/?LinkId=550986" target="_blank">Mail</a> for Windows 10<o:p></o:p></span></p></div><div><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'> <o:p></o:p></span></p></div></div></div></div></div></div></div><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p></div></body></html>