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Date: Sun, 13 Nov 2011 08:22:25 -0500
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From: Gary Casey <casey.gary@yahoo.com>
Reply-To: Gary Casey <casey.gary@yahoo.com>
Subject: Re: OAT Location
In-Reply-To: <listdigest-5197047@logan.com>
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I agree with Charley in that being in the sun isn't much of a concern - unl=
ess you are sitting on the ramp and in that case you already know the tempe=
rature :-). =A0I put mine in the wing root fairing on the right side. =A0It=
 is pretty close to the engine outlets, but seems to work okay. =A0I have f=
ound on other installations that it could almost just be thrown inside the =
wing someplace if it weren't for the heat sink of the fuel (the fuel temper=
ature doesn't change very fast, keep the air around the tank at a temperatu=
re different than outside). =A0Protruding out through any inspection panel =
would work. =A0How about protruding rearward through the fairing ahead of t=
he flap? =A0If it is one of the ugly round tubes you don't want it out in t=
he airflow because of the drag. =A0I like the NACA inlet in the tail (on th=
e ES and IV), but it requires a long wire run. =A0I don't like the cabin ai=
r inlets on the side of the fuselage (on the 320) as any leakage from the
 cowl is too close). =A0Lots of options.=0AGary Casey=0A=0A=0AI guess I was=
 fortunate enough to be ignorant of any sun avoidance requirements; stuck m=
ine in my NACA inlet for fresh air vents, and it seems to read pretty accur=
ately.=A0 I'm wondering how much effect the sun can possibly have on it whe=
n there's 200 kt of fresh air blowing on it; would be more concerned with a=
ir being heated upstream but other than sticking it aft of the lower cowl o=
utlets / exhaust, can't imagine anything else seriously affecting the frees=
tream temp.=A0 Until, of course, I upgrade to ramjet and start getting real=
 gas effects=0A=0AAt any rate, it seems to work fine in the NACA inlet.=0A=
=0ACharley Brown=A0 Legacy=A0 Garmin 900=0A
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<html><body><div style=3D"color:#000; background-color:#fff; font-family:bo=
okman old style, new york, times, serif;font-size:12pt"><div>I agree with C=
harley in that being in the sun isn't much of a concern - unless you are si=
tting on the ramp and in that case you already know the temperature :-). &n=
bsp;I put mine in the wing root fairing on the right side. &nbsp;It is pret=
ty close to the engine outlets, but seems to work okay. &nbsp;I have found =
on other installations that it could almost just be thrown inside the wing =
someplace if it weren't for the heat sink of the fuel (the fuel temperature=
 doesn't change very fast, keep the air around the tank at a temperature di=
fferent than outside). &nbsp;Protruding out through any inspection panel wo=
uld work. &nbsp;How about protruding rearward through the fairing ahead of =
the flap? &nbsp;If it is one of the ugly round tubes you don't want it out =
in the airflow because of the drag. &nbsp;I like the NACA inlet in the
 tail (on the ES and IV), but it requires a long wire run. &nbsp;I don't li=
ke the cabin air inlets on the side of the fuselage (on the 320) as any lea=
kage from the cowl is too close). &nbsp;Lots of options.</div><div>Gary Cas=
ey</div><div><br></div><div><span class=3D"Apple-style-span" style=3D"color=
: rgb(69, 69, 69); font-family: arial, helvetica, sans-serif; font-size: 13=
px; "><br>I guess I was fortunate enough to be ignorant of any sun avoidanc=
e requirements; stuck mine in my NACA inlet for fresh air vents, and it see=
ms to read pretty accurately.&nbsp; I'm wondering how much effect the sun c=
an possibly have on it when there's 200 kt of fresh air blowing on it; woul=
d be more concerned with air being heated upstream but other than sticking =
it aft of the lower cowl outlets / exhaust, can't imagine anything else ser=
iously affecting the freestream temp.&nbsp; Until, of course, I upgrade to =
ramjet and start getting real gas effects<br><br>At any rate, it seems
 to work fine in the NACA inlet.<br><br>Charley Brown&nbsp; Legacy&nbsp; Ga=
rmin 900<br></span></div></div></body></html>
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