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Take a look at:
https://www.hunker.com/13407187/how-to-calculate-cfm-from-rpms
Perry
Sent from Mail for Windows 10
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
I am confused by the terminology & illustrations on this site.=20
Terminology:=C2=A0
Pitch =3D angle of attack. An efficient fan/propeller blade usually has a h=
igher pitch near the hub (center) than at the tip. A blade with a constant =
pitch is less efficient.
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. Howe=
ver, the camber has t be appropriate to the application.=C2=A0
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
=C2=A0
=C2=A0
Sent from Mail for Windows 10
=C2=A0
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--></style></head><body lang=3DEN-US link=3Dblue vlink=3D"#954F72"><div cla=
ss=3DWordSection1><p class=3DMsoNormal>Take a look at:</p><p class=3DMsoNor=
mal><a href=3D"https://www.hunker.com/13407187/how-to-calculate-cfm-from-rp=
ms">https://www.hunker.com/13407187/how-to-calculate-cfm-from-rpms</a></p><=
p class=3DMsoNormal>Perry</p><p class=3DMsoNormal><o:p> </o:p></p><p c=
lass=3DMsoNormal>Sent from <a href=3D"https://go.microsoft.com/fwlink/?Link=
Id=3D550986">Mail</a> for Windows 10</p><p class=3DMsoNormal><o:p> </o=
:p></p><div style=3D'mso-element:para-border-div;border:none;border-top:sol=
id #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in'><p class=3DMsoNormal style=3D'b=
order:none;padding:0in'><b>From: </b><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 h=
ref=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>Su=
bject: </b>Re: [Healeys] Curved/quiet or Straight/efficent</p></div><p clas=
s=3DMsoNormal><o:p> </o:p></p><div><p class=3DMsoNormal><span style=3D=
'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=3DMsoNormal><span style=3D'font-size:10.0pt;font-family:"Ari=
al",sans-serif;color:black'>Terminology: <o:p></o:p></span></p></div><=
div><p class=3DMsoNormal><span style=3D'font-size:10.0pt;font-family:"Arial=
",sans-serif;color:black'>Pitch =3D angle of attack. An efficient fan/prope=
ller 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></d=
iv><div><p class=3DMsoNormal><span style=3D'font-size:10.0pt;font-family:"A=
rial",sans-serif;color:black'><o:p> </o:p></span></p></div><div><p cla=
ss=3DMsoNormal><span style=3D'font-size:10.0pt;font-family:"Arial",sans-ser=
if;color:black'>Blade Camber is the equivalent of a wing airfoil. A flat bl=
ade =3D 0 camber is generally less efficient than a blade with a camber/ ar=
ch/airfoil. However, the camber has t be appropriate to the application.&nb=
sp;<o:p></o:p></span></p></div><div><p class=3DMsoNormal><span style=3D'fon=
t-size:10.0pt;font-family:"Arial",sans-serif;color:black'><o:p> </o:p>=
</span></p></div><div><p class=3DMsoNormal style=3D'margin-bottom:12.0pt'><=
span style=3D'font-size:10.0pt;font-family:"Arial",sans-serif;color:black'>=
Gary<br><br><o:p></o:p></span></p><div><p class=3DMsoNormal style=3D'margin=
-bottom:12.0pt'><span style=3D'font-size:10.0pt;font-family:"Arial",sans-se=
rif;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=3Dyiv4103211760><div><di=
v><div><p class=3DMsoNormal><span style=3D'font-size:10.0pt;font-family:"Ar=
ial",sans-serif;color:black'>Sir Patrick<o:p></o:p></span></p></div><div><p=
class=3DMsoNormal><span style=3D'font-size:10.0pt;font-family:"Arial",sans=
-serif;color:black'>Please peruse the web site at: <a href=3D"https://davie=
scraig.com.au/blog/straight-vs-curved-fan-blades-dispelling-the-myth" targe=
t=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=3DMsoNorma=
l><span style=3D'font-size:10.0pt;font-family:"Arial",sans-serif;color:blac=
k'>They must have the best info on the globe since they are located down un=
der! </span><span style=3D'font-size:10.0pt;font-family:"Segoe UI Emoji",sa=
ns-serif;color:black'>😊</span><span 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 style=3D'font-size:10.0pt;font-family:"Arial",sans-=
serif;color:black'>Perry<o:p></o:p></span></p></div><div><p class=3DMsoNorm=
al><span style=3D'font-size:10.0pt;font-family:"Arial",sans-serif;color:bla=
ck'> <o:p></o:p></span></p></div><div><p class=3DMsoNormal><span 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 style=3D'font-size:=
10.0pt;font-family:"Arial",sans-serif;color:black'>Sent from <a href=3D"htt=
ps://go.microsoft.com/fwlink/?LinkId=3D550986" target=3D"_blank">Mail</a> f=
or Windows 10<o:p></o:p></span></p></div><div><p class=3DMsoNormal><span st=
yle=3D'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=3DM=
soNormal><span style=3D'font-size:10.0pt;font-family:"Arial",sans-serif;col=
or:black'><o:p> </o:p></span></p><p class=3DMsoNormal><o:p> </o:p=
></p></div></body></html>=
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_______________________________________________
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