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Reply-To: "kevin lane" <n3773@comcast.net>
From: "kevin lane" <n3773@comcast.net>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
References: <list-562126@logan.com>
Subject: exhaust design question
Date: Fri, 10 Dec 2004 09:27:51 -0800
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I am going to design my 20b exhaust, from plastic to start with.  when 
exhaust pipes join do they necessarily need to jump up in volume/dia.?  the 
exhaust is never flowing thru two at one time, correct?  my welder, Tom, 
with lots of race car experience, says that if I don't use a 3-to-1 
collector, and go to what he calls a log-type exhaust (with a plenum), that 
the "log" should be of a larger diameter. the pics I see here for turbos at 
least don't seem to follow that logic. the 3-1 design strikes me as 
difficult, heavy, and expensive. Tom says that the bellows are expensive, 
$120/ea, but wasn't sure how the log-type exhaust would handle the heat 
stress with it's inherently short runs.  The 3-1 works well for that because 
of the extra flex in the design.
    WWED? (what would Ed do?)  (if only straight pipes would be acceptable!)
Kevin Lane  Portland, OR
e-mail-> n3773@comcast.net
web-> http://home.comcast.net/~n3773
(browse w/ internet explorer)
----- Original Message ----- 
From: "Dale Rogers" <rogersda@cox.net>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Friday, December 10, 2004 4:18 AM
Subject: [FlyRotary] Re: In-line Oil Filter - reprise


>
>>
>> From: Bulent Aliev <atlasyts@bellsouth.net>
>> Date: 2004/12/10 Fri AM 06:51:08 EST
>> To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
>> Subject: [FlyRotary] Re: In-line Oil Filter - reprise
>>
>> Looks very good Dale. You can put one or two sensor holes or PSRU oil 
>> feed
>> port too?
>> Bulent
>
>   Yes.  In fact, that was my original intent - to make a
> block with bosses for temp and pressure sensors.  This one
> just got finished first.
>
>   I'm also working on another, larger, block that put the
> oil filter hanging down at 30* from level, instead of the
> current (nearly?) verticle.  It, too, will have bosses
> drilled and tapped for sensors (or oil feed).
>
> Dale R.
> COZY MkIV #1254
>
>
>
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