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<DIV><FONT face=Arial size=2>Tom,</FONT></DIV>
<DIV><FONT face=Arial size=2>It is a better header. Gives a larger volume closer
the exhaust port of the motor. This does a couple things, decreases temps,
reduces noise, and I think it increases power. All this at less weight than the
original header. This in my mind makes it more effective. I have been very
very happy with the setup. I was originally concerned about the exhaust gases
making a 90 deg turn but I have not seen any problems. In fact the motors are
running cooler and with less noise than before the new header. Maybe
the increased volume is overcoming the flow dynamics. I think its the
only way to go. I am of course Bias as I helped in the design of the
header. I also had run the header about 200-300 flights before they ever
produced a production version. It was very well tested with both 140 and
160DZ's. I have also run one a 140Sport and a140L. I think its exactly
what we needed to replace the older style NMP header. </FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Some guys have had trouble with it coming loose. I
have not. Now there is a copper washer included in the header that goes between
the header and the head of the motor. I don't have header problems with any of
them I run. I used the older Central headers since 99' and other than a few
prototype ones didn't break them. I also ran the brace only in 99' for part of
the year to try it out. Flew until last Fall without a brace on the same headers
I was running in 99'</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>The new DZ header does give a different profile,
and may not fit as well in some models. But in most cases it eliminates the need
to cut a big hole in the belly pan. The low profile design works really well. I
have only seen a couple of older models that had really thin front ends 2.75"
spinners where the new header would make a big hole in the side of the model to
fit.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Here is what I have done to keep anything from
coming loose. Tighten it up on the motor. Run it one time. While its still hot
after the run...Go in and tighten it up just that extra little 1/16th to 1/8th
of a turn. But Now with the copper washer it doesn't come loose at all. I have
lots and lots of flights on these headers and really no problems. We made some
changes early on last fall in the prototype headers to the way it was
built to solve a couple issues. However from the very first proof of
concept header it worked better than the old style. RIGHT now I think its
the best header available. I have been running it exclusively for over a year
now. </FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Troy</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
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<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=Tom.Koenig@actewagl.com.au
href="mailto:Tom.Koenig@actewagl.com.au">Koenig, Tom</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=discussion@nsrca.org
href="mailto:discussion@nsrca.org">Discussion</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Monday, November 15, 2004 1:52
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> NMP (Central) DZ header</DIV>
<DIV><BR></DIV><!-- Converted from text/rtf format -->
<P><FONT face="Comic Sans MS">Hi again,</FONT> <BR><FONT
face="Comic Sans MS">Anyone using the new style NMP DZ header offered by
Central? Is it any good??</FONT> </P>
<P><FONT face="Comic Sans MS">Just considering it..it just doesn't seem to
look as effective as the old original style. Is a brace recommended for this
one as well?</FONT></P>
<P><FONT face="Comic Sans MS">Thanks again</FONT> </P>
<P><FONT face="Comic Sans MS">Tom</FONT> </P>
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