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Message-ID: <000a01c40e30$bb9798b0$2402a8c0@edward>
From: "Ed Anderson" <eanderson@carolina.rr.com>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
References: <list-3103090@logan.com>
Subject: Re: [FlyRotary] Re: Cooling Ducts
Date: Fri, 19 Mar 2004 23:06:33 -0500
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Message
-----=20
From: Russell Duffy=20
To: Rotary motors in aircraft=20
Sent: Friday, March 19, 2004 9:49 PM
Subject: [FlyRotary] Re: Cooling Ducts
The 1.75" dia tubes should enable it to breath fairly well even with =
the long lenghts of runner. It will be interesting to see what you max =
rpm turns out to be.=20
Hi Ed. Well, I'm expecting good power, and am more interested than =
anyone to see what the climb rpm is on the first flight. I haven't =
changed the pitch of the prop, so this will be a direct comparison =
between the turbo installation at 5 psi, and the new NA version. I'm =
actually willing to run 7500 rpm for speed runs if necessary. We'll see =
how that works out. =20
As for cooling ducts, there's NFW my ducts are going to come close to =
resembling what you suggested. When I actually started looking at it =
today, I realized that the sides of the inlets are almost a straight =
shot back to the evap core since the core is mounted at an angle. The =
closest side to the inlet is only about 4 inches, and the longest is =
only about 9 inches. Not going to do much shaping in that small of a =
space. I'm afraid I'll have to hope for brute force cooling, with =
minimal assist from proper shaping. =20
I only got the rough foam cores made today. They fit inside the cowl, =
and I marked the inlet. Tomorrow, I have to actually shape it, and =
hopefully have time to glass them also. Have I ever mentioned that I =
hate fiberglass :-)
Rusty =20
You gotta do what you gotta do, Rusty
However, my ducts are inlets are 7" from the core at their longest, so =
sounds pretty much the same constraints. I know - you just don't want =
to do all that 'figguring and calclating" - well, always time for that =
the second time around (if you need it of course {:>)).
Yes, it will be very interesting to see how your NA stands up to your =
turbo installation at 5 psi. =20
And, Yes, you have mentioned hating fiberglass. Despite the fact I've =
now done plenty of it and am considered the "fiberglass man" around our =
pea patch - which means I'm the expert because I've actually put resin =
to glass - I still hate it. However, there is no question it is the way =
to go for some things as far as time is concerned.
Good luck and let her roll
Ed Anderson
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<DIV>----- </DIV>
<BLOCKQUOTE dir=3Dltr=20
style=3D"PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; =
BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV=20
style=3D"BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: =
black"><B>From:</B>=20
<A title=3D13brv3@bellsouth.net =
href=3D"mailto:13brv3@bellsouth.net">Russell=20
Duffy</A> </DIV>
<DIV style=3D"FONT: 10pt arial"><B>To:</B> <A =
title=3Dflyrotary@lancaironline.net=20
href=3D"mailto:flyrotary@lancaironline.net">Rotary motors in =
aircraft</A> </DIV>
<DIV style=3D"FONT: 10pt arial"><B>Sent:</B> Friday, March 19, 2004 =
9:49=20
PM</DIV>
<DIV style=3D"FONT: 10pt arial"><B>Subject:</B> [FlyRotary] Re: =
Cooling=20
Ducts</DIV>
<DIV><BR></DIV>
<DIV><SPAN class=3D494055914-19032004><SPAN =
class=3D730331516-19032004><FONT=20
face=3DArial> The 1.75" dia tubes should enable it to breath =
fairly well=20
even with the long lenghts of runner. It will be interesting to =
see what=20
you max rpm turns out to be.<SPAN class=3D908583802-20032004><FONT=20
color=3D#0000ff> </FONT></SPAN></FONT></SPAN></SPAN></DIV>
<DIV><SPAN class=3D494055914-19032004><SPAN =
class=3D730331516-19032004><FONT=20
face=3DArial><SPAN=20
class=3D908583802-20032004></SPAN></FONT></SPAN></SPAN> </DIV>
<DIV><SPAN class=3D494055914-19032004><SPAN =
class=3D730331516-19032004><FONT=20
face=3DArial><SPAN=20
class=3D908583802-20032004></SPAN></FONT></SPAN></SPAN> </DIV>
<DIV><SPAN class=3D494055914-19032004><SPAN =
class=3D730331516-19032004><FONT=20
face=3DArial><SPAN class=3D908583802-20032004><FONT color=3D#0000ff>Hi =
Ed. =20
Well, I'm expecting good power, and am more interested than anyone to =
see what=20
the climb rpm is on the first flight. I haven't changed the =
pitch of the=20
prop, so this will be a direct comparison between the turbo =
installation at 5=20
psi, and the new NA version. I'm actually willing to run =
7500 rpm=20
for speed runs if necessary. We'll see how that works=20
out. </FONT></SPAN></FONT></SPAN></SPAN></DIV>
<DIV><SPAN class=3D494055914-19032004><SPAN =
class=3D730331516-19032004><FONT=20
face=3DArial><SPAN=20
class=3D908583802-20032004></SPAN></FONT></SPAN></SPAN> </DIV>
<DIV><SPAN class=3D494055914-19032004><SPAN =
class=3D730331516-19032004><FONT=20
face=3DArial><SPAN class=3D908583802-20032004><FONT color=3D#0000ff>As =
for cooling=20
ducts, there's NFW my ducts are going to come close to resembling =
what=20
you suggested. When I actually started looking at it today, I =
realized=20
that the sides of the inlets are almost a straight shot back to the =
evap core=20
since the core is mounted at an angle. The closest side to the =
inlet is=20
only about 4 inches, and the longest is only about 9 inches. Not =
going=20
to do much shaping in that small of a space. I'm afraid =
I'll have=20
to hope for brute force cooling, with minimal assist from proper=20
shaping. </FONT></SPAN></FONT></SPAN></SPAN></DIV>
<DIV><SPAN class=3D494055914-19032004><SPAN =
class=3D730331516-19032004><FONT=20
face=3DArial><SPAN=20
class=3D908583802-20032004></SPAN></FONT></SPAN></SPAN> </DIV>
<DIV><SPAN class=3D494055914-19032004><SPAN =
class=3D730331516-19032004><FONT=20
face=3DArial><SPAN class=3D908583802-20032004><FONT color=3D#0000ff>I =
only got=20
the rough foam cores made today. They fit inside the cowl, =
and I=20
marked the inlet. Tomorrow, I have to actually shape it, =
and=20
hopefully have time to glass them also. Have I ever mentioned =
that I=20
hate fiberglass :-)</FONT></SPAN></FONT></SPAN></SPAN></DIV>
<DIV><SPAN class=3D494055914-19032004><SPAN =
class=3D730331516-19032004><FONT=20
face=3DArial><SPAN=20
class=3D908583802-20032004></SPAN></FONT></SPAN></SPAN> </DIV>
<DIV><SPAN class=3D494055914-19032004><SPAN =
class=3D730331516-19032004><FONT=20
face=3DArial><SPAN class=3D908583802-20032004><FONT=20
=
color=3D#0000ff>Rusty </FONT> </SPAN></FONT></SPAN>=
</SPAN></DIV>
<DIV><SPAN class=3D494055914-19032004><SPAN =
class=3D730331516-19032004><FONT=20
face=3DArial><SPAN=20
class=3D908583802-20032004></SPAN></FONT></SPAN></SPAN> </DIV>
<DIV><SPAN class=3D494055914-19032004><SPAN =
class=3D730331516-19032004><FONT=20
face=3DArial><SPAN=20
class=3D908583802-20032004></SPAN></FONT></SPAN></SPAN> </DIV>
<DIV><SPAN class=3D494055914-19032004><SPAN =
class=3D730331516-19032004><FONT=20
face=3DArial><SPAN class=3D908583802-20032004>You gotta do what you =
gotta do,=20
Rusty</SPAN></FONT></SPAN></SPAN></DIV>
<DIV><SPAN class=3D494055914-19032004><SPAN =
class=3D730331516-19032004><FONT=20
face=3DArial><SPAN=20
class=3D908583802-20032004></SPAN></FONT></SPAN></SPAN> </DIV>
<DIV><SPAN class=3D494055914-19032004><SPAN =
class=3D730331516-19032004><FONT=20
face=3DArial><SPAN class=3D908583802-20032004>However, my ducts are =
inlets are 7"=20
from the core at their longest, so sounds pretty much the same=20
constraints. I know - you just don't want to do all that =
'figguring and=20
calclating" - well, always time for that the second time around (if =
you need=20
it of course {:>)).</SPAN></FONT></SPAN></SPAN></DIV>
<DIV><SPAN class=3D494055914-19032004><SPAN =
class=3D730331516-19032004><FONT=20
face=3DArial><SPAN=20
class=3D908583802-20032004></SPAN></FONT></SPAN></SPAN> </DIV>
<DIV><SPAN class=3D494055914-19032004><SPAN =
class=3D730331516-19032004><FONT=20
face=3DArial><SPAN class=3D908583802-20032004>Yes, it will be very =
interesting to=20
see how your NA stands up to your turbo installation at 5 psi. =20
</SPAN></FONT></SPAN></SPAN></DIV>
<DIV><SPAN class=3D494055914-19032004><SPAN =
class=3D730331516-19032004><FONT=20
face=3DArial><SPAN=20
class=3D908583802-20032004></SPAN></FONT></SPAN></SPAN> </DIV>
<DIV><SPAN class=3D494055914-19032004><SPAN =
class=3D730331516-19032004><FONT=20
face=3DArial><SPAN class=3D908583802-20032004>And, Yes, you have =
mentioned hating=20
fiberglass. Despite the fact I've now done plenty of it and am=20
considered the "fiberglass man" around our pea patch - which means I'm =
the=20
expert because I've actually put resin to glass - I still hate =
it. =20
However, there is no question it is the way to go for some things as =
far as=20
time is concerned.</SPAN></FONT></SPAN></SPAN></DIV>
<DIV><SPAN class=3D494055914-19032004><SPAN =
class=3D730331516-19032004><FONT=20
face=3DArial><SPAN=20
class=3D908583802-20032004></SPAN></FONT></SPAN></SPAN> </DIV>
<DIV><SPAN class=3D494055914-19032004><SPAN =
class=3D730331516-19032004><FONT=20
face=3DArial><SPAN class=3D908583802-20032004>Good luck and let her=20
roll</SPAN></FONT></SPAN></SPAN></DIV>
<DIV><SPAN class=3D494055914-19032004><SPAN =
class=3D730331516-19032004><FONT=20
face=3DArial><SPAN=20
class=3D908583802-20032004></SPAN></FONT></SPAN></SPAN> </DIV>
<DIV><SPAN class=3D494055914-19032004><SPAN =
class=3D730331516-19032004><FONT=20
face=3DArial><SPAN class=3D908583802-20032004>Ed=20
Anderson</SPAN></FONT></SPAN></SPAN></DIV></BLOCKQUOTE></BODY></HTML>
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