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There are many things that affect the selection of the blade design besides=
efficiency. Such as, strength, cost of manufacturing, noise generation, de=
sired CFM at a specific resistance, (pressure drop), marketability to name =
a few.=C2=A0
I have a "Spal" brand of fan. Because it appeared to be high quality, was t=
hin enough to fit in front of my radiator & produced a relatively high CFM =
at about .25" pressure drop.
Gary Hodson
-----Original Message-----
From: Patrick & Caroline Quinn <p_cquinn@tpg.com.au>
To: healeys <healeys@autox.team.net>
Sent: Fri, Jan 24, 2020 3:26 pm
Subject: [Healeys] Curved or Straight
<!-- #yiv4865601795 _filtered {} _filtered {} #yiv4865601795 #yiv4865601=
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bri", "sans-serif";} _filtered {} #yiv4865601795 div.yiv4865601795WordSecti=
on1 {} -->Hello =C2=A0Once again I am about to investigate the engine co=
oling of the Healey Duncan. Nothing highly unusual with it in that it=E2=80=
=99s a Riley 2.4 litre engine and unpressurised. =C2=A0Part of the process =
is to replace the existing Kenlowe electric fan with a more modern unit. Th=
e Kenlow sits over an inch from the radiator surface while a modern unit sh=
ould only be a few millimetres. Of course it was never fitted with an elect=
ric fan when new, but it=E2=80=99s simply not coping with the warmer Austra=
lian climate. =C2=A0I will be doing all sorts of wonderful things like remo=
ving the cylinder head to replace the cooling tube between number two and t=
hree combustion chamber, refurbishing the radiator, rodding the block etc e=
tc. =C2=A0The question that=E2=80=99s on my mind concerns whether to instal=
l an electric fan with curved or straight blades. Australian manufacturer D=
avies Craig says that straight blades are best, but they would say that as =
that=E2=80=99s what they make. =C2=A0Anyone undertaken any research as to w=
hat=E2=80=99s the most efficient? =C2=A0Hoo Roo =C2=A0Patrick QuinnBlue Mou=
ntains, AustraliaWhere it=E2=80=99s raining again - wonderful______________=
_________________________________
Archive: http://www.team.net/pipermail/healeys http://autox.team.net/archiv=
e
Healeys@autox.team.net
http://autox.team.net/mailman/listinfo/healeys
n@aol.com
------=_Part_19353746_1693260595.1579903174801
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<div style=3D"color:black;font: 10pt arial;">There are many things that aff=
ect the selection of the blade design besides efficiency. Such as, strength=
, cost of manufacturing, noise generation, desired CFM at a specific resist=
ance, (pressure drop), marketability to name a few.
<div><br>
</div>
<div>I have a "Spal" brand of fan. Because it appeared to be high quality, =
was thin enough to fit in front of my radiator & produced a relatively =
high CFM at about .25" pressure drop.<br>
<br>
</div>
<div>Gary Hodson<br>
<br>
<div style=3D"font-family:arial,helvetica;font-size:10pt;color:black">-----=
Original Message-----<br>
From: Patrick & Caroline Quinn <p_cquinn@tpg.com.au><br>
To: healeys <healeys@autox.team.net><br>
Sent: Fri, Jan 24, 2020 3:26 pm<br>
Subject: [Healeys] Curved or Straight<br>
<br>
<div id=3D"yiv4865601795"><style><!-- #yiv4865601795 _filtered {} _f=
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soHyperlink {color:blue;text-decoration:underline;} #yiv4865601795 a:visit=
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<div>
<div class=3D"yiv4865601795WordSection1">
<div class=3D"yiv4865601795MsoNormal"><span style=3D"font-family:"Time=
s New Roman", "serif";">Hello</span></div>
<div class=3D"yiv4865601795MsoNormal"><span style=3D"font-family:"Time=
s New Roman", "serif";"> </span></div>
<div class=3D"yiv4865601795MsoNormal"><span style=3D"font-family:"Time=
s New Roman", "serif";">Once again I am about to investigate=
the engine cooling of the Healey Duncan. Nothing highly unusual with it in=
that it=E2=80=99s a Riley 2.4 litre engine and unpressurised.</span></div>
<div class=3D"yiv4865601795MsoNormal"><span style=3D"font-family:"Time=
s New Roman", "serif";"> </span></div>
<div class=3D"yiv4865601795MsoNormal"><span style=3D"font-family:"Time=
s New Roman", "serif";">Part of the process is to replace th=
e existing Kenlowe electric fan with a more modern unit. The Kenlow sits ov=
er an inch from the radiator surface while a modern unit should only be a f=
ew millimetres. Of course it was never fitted with an electric fan when new=
, but it=E2=80=99s simply not coping with the warmer Australian climate.</s=
pan></div>
<div class=3D"yiv4865601795MsoNormal"><span style=3D"font-family:"Time=
s New Roman", "serif";"> </span></div>
<div class=3D"yiv4865601795MsoNormal"><span style=3D"font-family:"Time=
s New Roman", "serif";">I will be doing all sorts of wonderf=
ul things like removing the cylinder head to replace the cooling tube betwe=
en number two and three combustion chamber, refurbishing the radiator, rodd=
ing the block etc etc.</span></div>
<div class=3D"yiv4865601795MsoNormal"><span style=3D"font-family:"Time=
s New Roman", "serif";"> </span></div>
<div class=3D"yiv4865601795MsoNormal"><span style=3D"font-family:"Time=
s New Roman", "serif";">The question that=E2=80=99s on my mi=
nd concerns whether to install an electric fan with curved or straight blad=
es. Australian manufacturer Davies Craig says that straight blades are best=
, but they would say that as that=E2=80=99s what they make.</span></div>
<div class=3D"yiv4865601795MsoNormal"><span style=3D"font-family:"Time=
s New Roman", "serif";"> </span></div>
<div class=3D"yiv4865601795MsoNormal"><span style=3D"font-family:"Time=
s New Roman", "serif";">Anyone undertaken any research as to=
what=E2=80=99s the most efficient?</span></div>
<div class=3D"yiv4865601795MsoNormal"><span style=3D"font-family:"Time=
s New Roman", "serif";"> </span></div>
<div class=3D"yiv4865601795MsoNormal"><span style=3D"font-family:"Time=
s New Roman", "serif";">Hoo Roo</span></div>
<div class=3D"yiv4865601795MsoNormal"><span style=3D"font-family:"Time=
s New Roman", "serif";"> </span></div>
<div class=3D"yiv4865601795MsoNormal"><span style=3D"font-family:"Time=
s New Roman", "serif";">Patrick Quinn</span></div>
<div class=3D"yiv4865601795MsoNormal"><span style=3D"font-family:"Time=
s New Roman", "serif";">Blue Mountains, Australia</span></di=
v>
<div class=3D"yiv4865601795MsoNormal"><span style=3D"font-family:"Time=
s New Roman", "serif";">Where it=E2=80=99s raining again - w=
onderful</span></div>
</div>
</div>
</div>
_______________________________________________<br>
ttp://www.team.net/donate.html">http://www.team.net/donate.html</a><br>
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net/mailman/listinfo/healeys">http://autox.team.net/mailman/listinfo/healey=
s</a><br>
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