- Brace yourself!!! 2-cycle pipes and coupler material

[Michael Ramsey]

Will the Greve pipe work on the OS 1.60?

Any idea if the same length will work with that engine?

Thanks!

Michael Ramsey


----- Original Message -----
From: "Woodward James R Civ 416 FLTS/TPS" <James.Woodward2 at edwards.af.mil>
To: <discussion at nsrca.org>
Sent: Monday, November 04, 2002 11:07 AM
Subject: - Brace yourself!!! 2-cycle pipes and coupler material


> Hey Folks
>
>  - Brace yourself!  Those of you that think the most expensive option for
> equipment is best, you may want to sit down.  This weekend I flew my Phase
> One with Webra 1.45 R and replaced my very expensive ES 2 cycle pipe with
> 0.9" inlet, with the less expensive Greve pipe.  On the ground, the engine
> seemed to run up a little better.  This engine has about 300 flights on
it.
> In the air, it was acting like a new engine again!!!!!!!!!!  This was a
VERY
> pleasent surprise, as the power was 'not-what-it-used-to-be'
> (understandably).  Still using the 17 x 12 APC (regular blade).
> Additionally, the "hickup" that was present when throttleing from inverted
> that was a pain with the ES setup, is now gone.  For instance, when
pushing
> around the bottom of the cuban 8 with 2/4, thottle is smooth without
> hessitation.  Same with exit of the triangle loop, and exit of the 3 turn
> spin. - very happy customer.  This was the same pipe I tried first on my
> Advantage.  That setup, I used the "full-length" MACs header, 1/4 - 3/8"
> gap, and the "full-length pipe".  That was about 1.5-2.0" longer than the
> 27.5" setup length on Piedmonts website.  Setup ran perfectly.  On the
Phase
> One setup, I used the 27.5" setting by cutting down the header, with
equally
> good performance.  I will attribute any extra performance on the Advantage
> due to it's using the new Webra AAR.  The design of the pipe does not lend
> to cutting anything from the pipe (... wouldn't recommend that approach).
> The whole setup fit with some room to spare in the Phase One.
>
>  I'm getting away from a kick of reading rpm of reading on the ground
(after
> some reading about pipe theory).  Readings show that max "air" performance
> is gained by getting the pipes peak performance on the ground, and
> lengthening the setup to about 300 rpms less.  Then, it unloads in the air
> and has more sustained power in the uplines.
>
> Header coupler material:  Tired of having your Aerotrend replacement
> silicone tubing crack and break too quickly?  www.mcmaster.com has
> "silicone" replacement tubing.  I ordered some off of Bob P.'s
> recommendation.  I ordered 2' each of "clear-medical" silicone, and "red"
> silicone tubing.  The material seems very good.  Total cost including
> shipping was $18.00.  The red feels lighter.  Both seem durable and
plyable
> - similiar to the material that Macs headers come with.
>
> Jim W.
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