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References: <list-4874075@logan.com>
To: flyrotary@lancaironline.net
Subject: Re: [FlyRotary] Re: Pressure increase from ram air
Date: Thu, 17 Feb 2011 16:15:45 -0500
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Standard day sea level pressure is 14.7 PSI or 29.92 inches of mercury. 1=
 inch of mercury is .49 PSI, 2 inches is .98 or ~ 1 psi.
Brian Trubee






-----Original Message-----
From: Michael McMahon <afm528@gmail.com>
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Sent: Thu, Feb 17, 2011 12:35 pm
Subject: [FlyRotary] Re: Pressure increase from ram air



Please forgive me if this is obvious, but is it possible to convert 2=E2=
=80=9D of mercury to X lbs. of boost, as in a turbo?  I=E2=80=99d love to=
 see the math if anyone can show me. =20
=20
Thanks,
=20
Mike
=20
From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Be=
half Of Tracy
Sent: Thursday, February 17, 2011 11:09 AM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: Pressure increase from ram air
=20
Yes, 2" of Hg, but that was at top speed when racing (224 mph), not cruise=
.  My ram air inlet is about 1" behind the prop which may affect the amoun=
t.

Tracy

On Thu, Feb 17, 2011 at 1:33 PM, Ernest Christley <echristley@att.net> wro=
te:

Tracy, you've said before that you can estimate 2" of pressure increase
from ram air at cruise.  Is that 2" of mercury?

--
Homepage:  http://www.flyrotary.com/
Archive and UnSub:   http://mail.lancaironline.net:81/lists/flyrotary/List=
.html

=20


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<font color=3D'black' size=3D'2' face=3D'arial'>
<div>Standard day sea level pressure is 14.7 PSI or 29.92 inches of mercur=
y. 1 inch of mercury is .49 PSI, 2 inches is .98 or ~ 1 psi.</div>


<div>Brian Trubee<br>
<br>
</div>


<div style=3D"CLEAR: both"></div>
<br>
<br>


<div style=3D"FONT-FAMILY: arial,helvetica; COLOR: black; FONT-SIZE: 10pt"=
>-----Original Message-----<br>
From: Michael McMahon &lt;afm528@gmail.com&gt;<br>
To: Rotary motors in aircraft &lt;flyrotary@lancaironline.net&gt;<br>
Sent: Thu, Feb 17, 2011 12:35 pm<br>
Subject: [FlyRotary] Re: Pressure increase from ram air<br>
<br>


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<div class=3DWordSection1>

<div class=3DMsoNormal><SPAN style=3D"FONT-FAMILY: 'Calibri','sans-serif';=
 COLOR: #1f497d; FONT-SIZE: 11pt">Please forgive me if this is obvious, bu=
t </SPAN><SPAN style=3D"FONT-FAMILY: 'Calibri','sans-serif'; COLOR: #1f497=
d; FONT-SIZE: 11pt">is it possible to convert </SPAN><SPAN style=3D"FONT-F=
AMILY: 'Calibri','sans-serif'; COLOR: #1f497d; FONT-SIZE: 11pt">2=E2=80=9D=
 of mercury to X lbs. of boost</SPAN><SPAN style=3D"FONT-FAMILY: 'Calibri'=
,'sans-serif'; COLOR: #1f497d; FONT-SIZE: 11pt">,</SPAN><SPAN style=3D"FON=
T-FAMILY: 'Calibri','sans-serif'; COLOR: #1f497d; FONT-SIZE: 11pt"> as in=
 a turbo?&nbsp; I=E2=80=99d love to see the math if anyone can show me.&nb=
sp; </SPAN></div>


<div class=3DMsoNormal><SPAN style=3D"FONT-FAMILY: 'Calibri','sans-serif';=
 COLOR: #1f497d; FONT-SIZE: 11pt">&nbsp;</SPAN></div>


<div class=3DMsoNormal><SPAN style=3D"FONT-FAMILY: 'Calibri','sans-serif';=
 COLOR: #1f497d; FONT-SIZE: 11pt">Thanks,</SPAN></div>


<div class=3DMsoNormal><SPAN style=3D"FONT-FAMILY: 'Calibri','sans-serif';=
 COLOR: #1f497d; FONT-SIZE: 11pt">&nbsp;</SPAN></div>


<div class=3DMsoNormal><SPAN style=3D"FONT-FAMILY: 'Calibri','sans-serif';=
 COLOR: #1f497d; FONT-SIZE: 11pt">Mike</SPAN></div>


<div class=3DMsoNormal><SPAN style=3D"FONT-FAMILY: 'Calibri','sans-serif';=
 COLOR: #1f497d; FONT-SIZE: 11pt">&nbsp;</SPAN></div>


<div class=3DMsoNormal><B><SPAN style=3D"FONT-FAMILY: 'Tahoma','sans-serif=
'; FONT-SIZE: 10pt">From:</SPAN></B><SPAN style=3D"FONT-FAMILY: 'Tahoma','=
sans-serif'; FONT-SIZE: 10pt"> Rotary motors in aircraft [<A href=3D"mailt=
o:flyrotary@lancaironline.net?">mailto:flyrotary@lancaironline.net</A>] <B=
>On Behalf Of </B>Tracy<br>
<B>Sent:</B> Thursday, February 17, 2011 11:09 AM<br>
<B>To:</B> Rotary motors in aircraft<br>
<B>Subject:</B> [FlyRotary] Re: Pressure increase from ram air</SPAN></div=
>


<div class=3DMsoNormal>&nbsp;</div>


<div style=3D"MARGIN-BOTTOM: 12pt" class=3DMsoNormal>Yes, 2" of Hg, but th=
at was at top speed when racing (224 mph), not cruise.&nbsp; My ram air in=
let is about 1" behind the prop which may affect the amount.<br>
<br>
Tracy</div>


<div>

<div class=3DMsoNormal>On Thu, Feb 17, 2011 at 1:33 PM, Ernest Christley=
 &lt;<A href=3D"mailto:echristley@att.net">echristley@att.net</A>&gt; wrot=
e:</div>


<div class=3DMsoNormal><br>
Tracy, you've said before that you can estimate 2" of pressure increase<br=
>
from ram air at cruise. &nbsp;Is that 2" of mercury?<br>
<SPAN style=3D"COLOR: #888888"><br>
--<br>
Homepage: &nbsp;<A href=3D"http://www.flyrotary.com/" target=3D_blank>http=
://www.flyrotary.com/</A><br>
Archive and UnSub: &nbsp; <A href=3D"http://mail.lancaironline.net:81/list=
s/flyrotary/List.html" target=3D_blank>http://mail.lancaironline.net:81/li=
sts/flyrotary/List.html</A></SPAN></div>
</div>


<div class=3DMsoNormal>&nbsp;</div>
</div>
</div>
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