[NSRCA-discussion] Need info Hydout header & pipe for Webra 145

[Rcmaster199 at aol.com]

This subject has been discussed a great deal over that past several years.  
Ed Hartley's web site has a bunch of useful info on it. 
 
>From my experience, the Hatori aluminum pipe seems to work the best in my  
set-ups, and is the quietest compared to the long ES 160 and the grieve. It's  
also the heaviest and not particularly inexpensive ( at least not any more).  
Glow plug to reflectror is set at 24 3/4" straight line, using the Macs 2 1/2"  
rise header. Not the lightest set-up in the land, but then again, weight 
isn't  my plane's problem. At 9# 14, I don't worry about it.
 
Matt

From:  _Gordon Anderson_ (mailto:gordonanderson at verizon.net)  
To: _'NSRCA Mailing List'_ (mailto:nsrca-discussion at lists.nsrca.org)  
Sent: Saturday, December 17, 2005 8:06  PM
Subject: RE: [NSRCA-discussion] Need info  Hydout header & pipe for Webra 145


Paul,
 
Not sure what other pipes are good for the  Webra, I was kind of hoping 
someone else would jump in with pipe options. I'm  building an Impact and powering 
it with a Webra 1.60, I would like to find a  pipe a little less expensive 
than the ES. The ES stuff is very good, I have  used a couple of there pipes.
As far as the rise calculation goes, I  think its the centerline of the 
exhaust port to the centerline of the pipe.  
I have always used a pipe port diameter  that matched the diameter of the 
header.
 
--Gordon

 
____________________________________
 From: nsrca-discussion-bounces at lists.nsrca.org  
[mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of  paul
Sent: Saturday, December 17, 2005 2:35 PM
To:  NSRCA Mailing List
Subject: Re: [NSRCA-discussion] Need info Hydout  header & pipe for Webra 145



What other pipes are good -  that one is a bit pricey.  Also how do I go 
about calculating the header  rise ?
    I suppose it would require  first picking the pipe and then the pipe 
center would be 1/2 the diameter (yes  I know that is called the radius) plus the 
standoff distance from the  fuse.  The vertical distance between the pipe 
center and the center of  the exhaust would yield the rise.
    Is there a generally useable  estimate for pipe diameter that can be used 
w/o first selecting the pipe  ?
Thanks,
Paul



 
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