From: "A R Goldman argoldman@aol.com" <flyrotary@lancaironline.net>
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Date: Fri, 6 Sep 2019 12:24:40 -0500
Subject: Re: [FlyRotary] Re: Part specs-radiator design
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To: Rotary motors in aircraft <flyrotary@lancaironline.net>


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Not totally true as I learned from overheating my norton rotary dragonfly. I=
t makes sense that air flows from high pressure to low. But. Many times oh h=
as a mind of its own counterintuitively. For example as the air exit the exc=
hanger if it is not allowed to exit straight or gently deflected, independen=
t of the delta the air will stagnate and not go where you expect. Pay as muc=
h attention to the exit as you do with the entry

Yrmv

Rich

Sent from my iPhone

> On Sep 6, 2019, at 11:52 AM, William Jepson wrjjrs@gmail.com <flyrotary@la=
ncaironline.net> wrote:
>=20
> Answer is nothing; provided the airflow is there. Also there needs to be a=
 vent or tap to get all the air out of the inside.
> Bill Jepson=20
>=20
>> On Fri, Sep 6, 2019 at 8:38 AM Marc Wiese cardmarc@charter.net <flyrotary=
@lancaironline.net> wrote:
>> Finn asks-
>> "BTW, what happens when you lay down (at a 20 degree) angle a radiator th=
at is designed to be upright?"
>>=20
>> I always wondered about that myself. The stock FD (3rd gen) radiator has t=
o be at about a 45 degree angle (?) to the incoming airstream. And it has 2 "=
supplemental" staged electric fans (no pump fan), one is always on if the AC=
 is on, the fans have different blades and different speeds controlled by EC=
U and temp sensor. I suppose the fins are canted or perhaps they are best ti=
lted to airflow to create turbulence and help remove some heat..........don'=
t know much about radiator design............
>> MW
>>=20
>> --
>> Homepage:  http://www.flyrotary.com/
>> Archive and UnSub:   http://mail.lancaironline.net:81/lists/flyrotary/Lis=
t.html
>>=20
>>=20
>> --
>> Homepage:  http://www.flyrotary.com/
>> Archive and UnSub:   http://mail.lancaironline.net:81/lists/flyrotary/Lis=
t.html

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<html><head><meta http-equiv=3D"content-type" content=3D"text/html; charset=3D=
utf-8"></head><body dir=3D"auto">Not totally true as I learned from overheat=
ing my norton rotary dragonfly. It makes sense that air flows from high pres=
sure to low. But. Many times oh has a mind of its own counterintuitively. Fo=
r example as the air exit the exchanger if it is not allowed to exit straigh=
t or gently deflected, independent of the delta the air will stagnate and no=
t go where you expect. Pay as much attention to the exit as you do with the e=
ntry<div><br></div><div>Yrmv</div><div><br></div><div>Rich<br><br><div id=3D=
"AppleMailSignature" dir=3D"ltr">Sent from my iPhone</div><div dir=3D"ltr"><=
br>On Sep 6, 2019, at 11:52 AM, William Jepson <a href=3D"mailto:wrjjrs@gmai=
l.com">wrjjrs@gmail.com</a> &lt;<a href=3D"mailto:flyrotary@lancaironline.ne=
t">flyrotary@lancaironline.net</a>&gt; wrote:<br><br></div><blockquote type=3D=
"cite"><div dir=3D"ltr"><div><div dir=3D"auto">Answer is nothing; provided t=
he airflow is there. Also there needs to be a vent or tap to get all the air=
 out of the inside.</div></div><div dir=3D"auto">Bill Jepson&nbsp;</div><div=
><br><div class=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_attr">On Fri=
, Sep 6, 2019 at 8:38 AM Marc Wiese <a href=3D"mailto:cardmarc@charter.net">=
cardmarc@charter.net</a> &lt;<a href=3D"mailto:flyrotary@lancaironline.net">=
flyrotary@lancaironline.net</a>&gt; wrote:<br></div><blockquote class=3D"gma=
il_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left=
:1ex">Finn asks-<br>
"BTW, what happens when you lay down (at a 20 degree) angle a radiator that i=
s designed to be upright?"<br>
<br>
I always wondered about that myself. The stock FD (3rd gen) radiator has to b=
e at about a 45 degree angle (?) to the incoming airstream. And it has 2 "su=
pplemental" staged electric fans (no pump fan), one is always on if the AC i=
s on, the fans have different blades and different speeds controlled by ECU a=
nd temp sensor. I suppose the fins are canted or perhaps they are best tilte=
d to airflow to create turbulence and help remove some heat..........don't k=
now much about radiator design............<br>
MW<br>
<br>
--<br>
Homepage:&nbsp; <a href=3D"http://www.flyrotary.com/" rel=3D"noreferrer" tar=
get=3D"_blank">http://www.flyrotary.com/</a><br>
Archive and UnSub:&nbsp; &nbsp;<a href=3D"http://mail.lancaironline.net:81/l=
ists/flyrotary/List.html" rel=3D"noreferrer" target=3D"_blank">http://mail.l=
ancaironline.net:81/lists/flyrotary/List.html</a><br>
<br>
<br>
--<br>
Homepage:&nbsp; <a href=3D"http://www.flyrotary.com/" rel=3D"noreferrer" tar=
get=3D"_blank">http://www.flyrotary.com/</a><br>
Archive and UnSub:&nbsp; &nbsp;<a href=3D"http://mail.lancaironline.net:81/l=
ists/flyrotary/List.html" rel=3D"noreferrer" target=3D"_blank">http://mail.l=
ancaironline.net:81/lists/flyrotary/List.html</a><br>
</blockquote></div></div>
</div></blockquote></div></body></html>=

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