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Message-ID: <63163d560705040717y5a14ad8du4e17e01858256bf3@mail.gmail.com>
Date: Fri, 4 May 2007 09:17:03 -0500
From: "Thomas Jakits" <rotary.thjakits@gmail.com>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Subject: Re: [FlyRotary] Re: Cooling area drag
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Bob,
I may be wrong, but what I remember (preciously little....) from Engineering
school:
Line-size should not matter on the pressure - less loss if anything.
Up-side: Bigger lines mean, less flow-speed, more volume - added heat
buffer, less friction, less loss in the turns.
Down-side: Bigger lines cost more, are heavier, so is the add. oil in the
lines

After all, ...if I am not wrong somewhere, I would go with the biggest
practical line possible.
If a 10 fits, a 10 it would be!

2cents

TJ

PS: Marv, this is a reply to ONE message in a row of many. All I show is
Bob's 3 lines below.
I hope nothing else "comes along"! - I am very aware of message size and try
to snip where I can...
Jesus, you started to sound like a certain strict headmaster on a different
letter :)) !


On 5/3/07, BMears9413@aol.com <BMears9413@aol.com> wrote:
>
>  We started with #6 lines to keep pressure up. but discovered that volume
> suffered beyond spec so we switched to # 8. I have 15' of total line and
> coolers. I know it doesn't sound like the best setup...but I thought it
> would not be a problem. What are you thinking?
>
> Bob Mears
>
>
>
>  ------------------------------
> See what's free at AOL.com <http://www.aol.com/?ncid=AOLAOF00020000000503>.
>
>

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<div>Bob,</div>
<div>I may be wrong, but what I remember (preciously little....) from Engineering school:</div>
<div>Line-size should not matter on the pressure - less loss if anything.</div>
<div>Up-side: Bigger lines mean, less flow-speed, more volume - added heat buffer, less friction, less loss in the turns.</div>
<div>Down-side: Bigger lines cost more, are heavier, so is the add. oil in the lines</div>
<div>&nbsp;</div>
<div>After all, ...if I am not wrong somewhere, I would go with the biggest practical line possible.</div>
<div>If a 10 fits, a 10 it would be!</div>
<div>&nbsp;</div>
<div>2cents</div>
<div>&nbsp;</div>
<div>TJ</div>
<div>&nbsp;</div>
<div>PS: Marv, this is a reply to ONE message in a row of many. All I show is Bob&#39;s 3 lines below.</div>
<div>I hope nothing else &quot;comes along&quot;! - I am very aware of message size and try to snip where I can...</div>
<div>Jesus, you started to sound like a certain&nbsp;strict headmaster&nbsp;on a different letter :)) !<br><br>&nbsp;</div>
<div><span class="gmail_quote">On 5/3/07, <b class="gmail_sendername"><a href="mailto:BMears9413@aol.com">BMears9413@aol.com</a></b> &lt;<a href="mailto:BMears9413@aol.com">BMears9413@aol.com</a>&gt; wrote:</span>
<blockquote class="gmail_quote" style="PADDING-LEFT: 1ex; MARGIN: 0px 0px 0px 0.8ex; BORDER-LEFT: #ccc 1px solid">
<div style="FONT-SIZE: 10pt; COLOR: #000000; FONT-FAMILY: Arial"><font face="Arial" color="#000000" size="2">
<div>We started with #6 lines to keep pressure up. but discovered that volume suffered beyond spec so we switched to # 8. I have 15&#39; of total line and coolers. I know it doesn&#39;t sound like the best setup...but I thought it would not be a problem. What are you thinking?
</div>
<div>&nbsp;</div>
<div>Bob Mears</div></font><br><br><br>
<div><font style="FONT: 10pt ARIAL, SAN-SERIF; COLOR: black">
<hr style="MARGIN-TOP: 10px">
See what&#39;s free at <a title="http://www.aol.com?ncid=AOLAOF00020000000503" onclick="return top.js.OpenExtLink(window,event,this)" href="http://www.aol.com/?ncid=AOLAOF00020000000503" target="_blank">AOL.com</a>. </font>
</div></div></blockquote></div><br>

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