From: "William Jepson wrjjrs@gmail.com" <flyrotary@lancaironline.net>
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Date: Fri, 6 Sep 2019 09:52:07 -0700
Message-ID: <CAN=mtacBqD247PC7_Q-C0EHMf7UG_7uJXMuCaYG35BVd4GAxBg@mail.gmail.com>
Subject: Re: [FlyRotary] Re: Part specs-radiator design
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
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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

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
> that is designed to be upright?"
>
> I always wondered about that myself. The stock FD (3rd gen) radiator has
> to 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 ECU and temp sensor. I suppose the fins are canted or perhaps
> they are best tilted to airflow to create turbulence and help remove some
> heat..........don't know much about radiator design............
> MW
>
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>
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<div><div dir=3D"auto">Answer is nothing; provided the airflow is there. Al=
so there needs to be a vent or tap to get all the air out of the inside.</d=
iv></div><div dir=3D"auto">Bill Jepson=C2=A0</div><div><br><div class=3D"gm=
ail_quote"><div dir=3D"ltr" class=3D"gmail_attr">On Fri, Sep 6, 2019 at 8:3=
8 AM Marc Wiese <a href=3D"mailto:cardmarc@charter.net">cardmarc@charter.ne=
t</a> &lt;<a href=3D"mailto:flyrotary@lancaironline.net">flyrotary@lancairo=
nline.net</a>&gt; wrote:<br></div><blockquote class=3D"gmail_quote" style=
=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Finn ask=
s-<br>
&quot;BTW, what happens when you lay down (at a 20 degree) angle a radiator=
 that is designed to be upright?&quot;<br>
<br>
I always wondered about that myself. The stock FD (3rd gen) radiator has to=
 be at about a 45 degree angle (?) to the incoming airstream. And it has 2 =
&quot;supplemental&quot; staged electric fans (no pump fan), one is always =
on if the AC is on, the fans have different blades and different speeds con=
trolled by ECU and temp sensor. I suppose the fins are canted or perhaps th=
ey are best tilted to airflow to create turbulence and help remove some hea=
t..........don&#39;t know much about radiator design............<br>
MW<br>
<br>
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Homepage:=C2=A0 <a href=3D"http://www.flyrotary.com/" rel=3D"noreferrer" ta=
rget=3D"_blank">http://www.flyrotary.com/</a><br>
Archive and UnSub:=C2=A0 =C2=A0<a href=3D"http://mail.lancaironline.net:81/=
lists/flyrotary/List.html" rel=3D"noreferrer" target=3D"_blank">http://mail=
.lancaironline.net:81/lists/flyrotary/List.html</a><br>
<br>
<br>
--<br>
Homepage:=C2=A0 <a href=3D"http://www.flyrotary.com/" rel=3D"noreferrer" ta=
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Archive and UnSub:=C2=A0 =C2=A0<a href=3D"http://mail.lancaironline.net:81/=
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</blockquote></div></div>

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