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Re: [Healeys] Curved/quiet or Straight/efficent

To: "'Harold Manifold'" <manifold@telus.net>
Subject: Re: [Healeys] Curved/quiet or Straight/efficent
From: "Patrick & Caroline Quinn" <p_cquinn@tpg.com.au>
Date: Sat, 25 Jan 2020 15:04:07 +1100
Cc: healeys@autox.team.net
Delivered-to: mharc@autox.team.net
Delivered-to: healeys@autox.team.net
References: <683516922.19433339.1579906154187.ref@mail.yahoo.com> <683516922.19433339.1579906154187@mail.yahoo.com> <20200124231705.1E588A0977@autox.team.net> <C3D4D328C32A44B1B5D6F645E2D4FA50@AllInOne>
Thread-index: AQItRmhDtaNSX/3Qf94/w77g1VQFFwIL8Z8sAcPRTfQCTeFdMaca7Nkw
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Hello Harold

=20

Thanks for your input.

=20

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.

=20

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=E2=80=99s 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.

=20

In other words BMC engineers really didn=E2=80=99t give much =
consideration to an improvement in engine cooling especially for warmer =
climates, fan blades excepted.

=20

Hoo Roo

=20

Patrick Quinn

=20

From: Harold Manifold [mailto:manifold@telus.net]=20
Sent: Saturday, 25 January 2020 1:32 PM
To: 'Perry'; warthodson@aol.com; p_cquinn@tpg.com.au
Subject: RE: [Healeys] Curved/quiet or Straight/efficent

=20

Have a look at this article. BTW fans don't do much at speeds over 25 =
MPH.

=20

https://www.verus-engineering.com/blog/informative-8/post/radiator-fans-i=
n-depth-explanation-and-information-32

=20

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.

=20

Just my thoughts ... Harold

=20

=20

=20

  _____ =20

From: Healeys [mailto:healeys-bounces@autox.team.net] On Behalf Of Perry =
via Healeys
Sent: Friday, January 24, 2020 3:16 PM
To: warthodson@aol.com; p_cquinn@tpg.com.au
Cc: healeys@autox.team.net
Subject: Re: [Healeys] Curved/quiet or Straight/efficent

Take a look at:

https://www.hunker.com/13407187/how-to-calculate-cfm-from-rpms

Perry

=20

Sent from Mail <https://go.microsoft.com/fwlink/?LinkId=3D550986>  for =
Windows 10

=20

From: warthodson@aol.com
Sent: Friday, January 24, 2020 5:49 PM
To: healeyguy@aol.com; p_cquinn@tpg.com.au
Cc: healeys@autox.team.net
Subject: Re: [Healeys] Curved/quiet or Straight/efficent

=20

I am confused by the terminology & illustrations on this site.=20

Terminology:=20

Pitch =3D 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.

=20

Blade Camber is the equivalent of a wing airfoil. A flat blade =3D 0 =
camber is generally less efficient than a blade with a camber/ =
arch/airfoil. However, the camber has t be appropriate to the =
application.=20

=20

Gary

-----Original Message-----
From: Perry via Healeys <healeys@autox.team.net>
To: Patrick & Caroline Quinn <p_cquinn@tpg.com.au>
Cc: healeys@autox.team.net <healeys@autox.team.net>
Sent: Fri, Jan 24, 2020 4:11 pm
Subject: Re: [Healeys] Curved/quiet or Straight/efficent

Sir Patrick

Please peruse the web site at: =
https://daviescraig.com.au/blog/straight-vs-curved-fan-blades-dispelling-=
the-myth

They must have the best info on the globe since they are located down =
under! =F0=9F=98=8A

Perry

=20

=20

Sent from Mail <https://go.microsoft.com/fwlink/?LinkId=3D550986>  for =
Windows 10

=20

=20

=20


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</o:shapelayout></xml><![endif]--></head><body lang=3DEN-AU link=3Dblue =
vlink=3D"#954F72"><div class=3DWordSection1><p class=3DMsoNormal><span =
style=3D'font-family:"Times New Roman","serif"'>Hello =
Harold<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-family:"Times New =
Roman","serif"'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-family:"Times New Roman","serif"'>Thanks for your =
input.<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-family:"Times New =
Roman","serif"'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'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=3DMsoNormal><span =
style=3D'font-family:"Times New =
Roman","serif"'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'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=E2=80=99s 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=3DMsoNormal><span =
style=3D'font-family:"Times New =
Roman","serif"'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-family:"Times New Roman","serif"'>In other words BMC =
engineers really didn=E2=80=99t give much consideration to an =
improvement in engine cooling especially for warmer climates, fan blades =
excepted.<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-family:"Times New =
Roman","serif"'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-family:"Times New Roman","serif"'>Hoo =
Roo<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-family:"Times New =
Roman","serif"'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-family:"Times New Roman","serif"'>Patrick =
Quinn<o:p></o:p></span></p><p class=3DMsoNormal><span =
style=3D'font-family:"Times New =
Roman","serif"'><o:p>&nbsp;</o:p></span></p><div><div =
style=3D'border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm =
0cm 0cm'><p class=3DMsoNormal><b><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span>=
</b><span lang=3DEN-US =
style=3D'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=3DMsoNormal><o:p>&nbsp;</o:p></p><p class=3DMsoNormal><span =
lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Arial","sans-serif";color:blue'>Ha=
ve a look at this article. BTW fans don't do much at speeds over 25 =
MPH.</span><span lang=3DEN-US =
style=3D'font-size:12.0pt;font-family:"Times New =
Roman","serif"'><o:p></o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US style=3D'font-size:12.0pt;font-family:"Times New =
Roman","serif"'>&nbsp;<o:p></o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Arial","sans-serif";color:blue'><a=
 =
href=3D"https://www.verus-engineering.com/blog/informative-8/post/radiato=
r-fans-in-depth-explanation-and-information-32">https://www.verus-enginee=
ring.com/blog/informative-8/post/radiator-fans-in-depth-explanation-and-i=
nformation-32</a></span><span lang=3DEN-US =
style=3D'font-size:12.0pt;font-family:"Times New =
Roman","serif"'><o:p></o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US style=3D'font-size:12.0pt;font-family:"Times New =
Roman","serif"'>&nbsp;<o:p></o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Arial","sans-serif";color:blue'>Fo=
r the record I&nbsp;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=3DEN-US =
style=3D'font-size:12.0pt;font-family:"Times New =
Roman","serif"'><o:p></o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US style=3D'font-size:12.0pt;font-family:"Times New =
Roman","serif"'>&nbsp;<o:p></o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Arial","sans-serif";color:blue'>Ju=
st my thoughts ... Harold</span><span lang=3DEN-US =
style=3D'font-size:12.0pt;font-family:"Times New =
Roman","serif"'><o:p></o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US style=3D'font-size:12.0pt;font-family:"Times New =
Roman","serif"'>&nbsp;<o:p></o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US style=3D'font-size:12.0pt;font-family:"Times New =
Roman","serif"'>&nbsp;<o:p></o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US style=3D'font-size:12.0pt;font-family:"Times New =
Roman","serif"'><o:p>&nbsp;</o:p></span></p><div class=3DMsoNormal =
align=3Dcenter style=3D'text-align:center'><span lang=3DEN-US =
style=3D'font-size:12.0pt;font-family:"Times New Roman","serif"'><hr =
size=3D3 width=3D"100%" align=3Dcenter></span></div><p class=3DMsoNormal =
style=3D'margin-bottom:12.0pt'><b><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span>=
</b><span lang=3DEN-US =
style=3D'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=3DEN-US =
style=3D'font-size:12.0pt;font-family:"Times New =
Roman","serif"'><o:p></o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US>Take a look at:<o:p></o:p></span></p><p =
class=3DMsoNormal><span lang=3DEN-US><a =
href=3D"https://www.hunker.com/13407187/how-to-calculate-cfm-from-rpms";>h=
ttps://www.hunker.com/13407187/how-to-calculate-cfm-from-rpms</a><o:p></o=
:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US>Perry<o:p></o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US>Sent from <a =
href=3D"https://go.microsoft.com/fwlink/?LinkId=3D550986";>Mail</a> for =
Windows 10<o:p></o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US><o:p>&nbsp;</o:p></span></p><div =
style=3D'border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm =
0cm 0cm'><p class=3DMsoNormal><b><span lang=3DEN-US>From: =
</span></b><span lang=3DEN-US><a =
href=3D"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=3D"mailto:healeyguy@aol.com";>healeyguy@aol.com</a>; <a =
href=3D"mailto:p_cquinn@tpg.com.au";>p_cquinn@tpg.com.au</a><br><b>Cc: =
</b><a =
href=3D"mailto:healeys@autox.team.net";>healeys@autox.team.net</a><br><b>S=
ubject: </b>Re: [Healeys] Curved/quiet or =
Straight/efficent<o:p></o:p></span></p></div><p class=3DMsoNormal><span =
lang=3DEN-US><o:p>&nbsp;</o:p></span></p><div><p class=3DMsoNormal><span =
lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Arial","sans-serif";color:black'>I=
 am confused by the terminology &amp; illustrations on this site. =
<o:p></o:p></span></p><div><p class=3DMsoNormal><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Arial","sans-serif";color:black'>T=
erminology:&nbsp;<o:p></o:p></span></p></div><div><p =
class=3DMsoNormal><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Arial","sans-serif";color:black'>P=
itch =3D 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=3DMsoNormal><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Arial","sans-serif";color:black'><=
o:p>&nbsp;</o:p></span></p></div><div><p class=3DMsoNormal><span =
lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Arial","sans-serif";color:black'>B=
lade Camber is the equivalent of a wing airfoil. A flat blade =3D 0 =
camber is generally less efficient than a blade with a camber/ =
arch/airfoil. However, the camber has t be appropriate to the =
application.&nbsp;<o:p></o:p></span></p></div><div><p =
class=3DMsoNormal><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Arial","sans-serif";color:black'><=
o:p>&nbsp;</o:p></span></p></div><div><p class=3DMsoNormal =
style=3D'margin-bottom:12.0pt'><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Arial","sans-serif";color:black'>G=
ary<o:p></o:p></span></p><div><p class=3DMsoNormal =
style=3D'margin-bottom:12.0pt'><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Arial","sans-serif";color:black'>-=
----Original Message-----<br>From: Perry via Healeys =
&lt;healeys@autox.team.net&gt;<br>To: Patrick &amp; Caroline Quinn =
&lt;p_cquinn@tpg.com.au&gt;<br>Cc: healeys@autox.team.net =
&lt;healeys@autox.team.net&gt;<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=3Dyiv4103211760><div><div><div><p class=3DMsoNormal><span =
lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Arial","sans-serif";color:black'>S=
ir Patrick<o:p></o:p></span></p></div><div><p class=3DMsoNormal><span =
lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Arial","sans-serif";color:black'>P=
lease peruse the web site at: <a =
href=3D"https://daviescraig.com.au/blog/straight-vs-curved-fan-blades-dis=
pelling-the-myth" =
target=3D"_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=3DMsoNormal><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Arial","sans-serif";color:black'>T=
hey must have the best info on the globe since they are located down =
under! </span><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Segoe UI =
Symbol","sans-serif";color:black'>&#128522;</span><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Arial","sans-serif";color:black'><=
o:p></o:p></span></p></div><div><p class=3DMsoNormal><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Arial","sans-serif";color:black'>P=
erry<o:p></o:p></span></p></div><div><p class=3DMsoNormal><span =
lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Arial","sans-serif";color:black'>&=
nbsp;<o:p></o:p></span></p></div><div><p class=3DMsoNormal><span =
lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Arial","sans-serif";color:black'>&=
nbsp;<o:p></o:p></span></p></div><div><p class=3DMsoNormal><span =
lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Arial","sans-serif";color:black'>S=
ent from <a href=3D"https://go.microsoft.com/fwlink/?LinkId=3D550986"; =
target=3D"_blank">Mail</a> for Windows =
10<o:p></o:p></span></p></div><div><p class=3DMsoNormal><span =
lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Arial","sans-serif";color:black'>&=
nbsp;<o:p></o:p></span></p></div></div></div></div></div></div></div><p =
class=3DMsoNormal><span lang=3DEN-US =
style=3D'font-size:10.0pt;font-family:"Arial","sans-serif";color:black'><=
o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span =
lang=3DEN-US><o:p>&nbsp;</o:p></span></p></div></body></html>
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