On Jan 18, 2014, at 10:56 AM, Charlie England <ceengland7@gmail.com> wrote:

Thanks, Mark. I discovered that after I sent the previous message. Their web site seems to have a somewhat random 'organization'.

Is the non-res model only 20" overall, as they describe? That would make it only slightly longer than the H.P. resonator that Dennis is using, & since it appears to be only a perforated tube in the main cylinder, it should survive much better than anything with actual baffles and/or packing.

Charlie

On 1/18/2014 9:38 AM, Mark Steitle wrote:
Charlie,
They stock two types, one with packing, one without.  The one with packing is their "resonator"model, and it is longer than the non-res model.  I bought the non-res model as I figured the packing was only temporary.  I have not installed it yet, so no flight report.

Mark

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On Jan 18, 2014, at 8:54 AM, Charlie England <ceengland7@gmail.com> wrote:

Thanks, Tracy; it's good news that it is both quiet and survives. Didn't realize that the aeroturbine had packing in it. If it performs as well as, or better than the hushpower, I may give it a shot. It's actually a bit cheaper than the h.p. resonator.

Charlie

On 1/17/2014 10:53 AM, Tracy wrote:
The aero turbine sounded better than the Hushpower II  but both change in tone over time, probably due to packing deteriorating.   Still, the AT was the best after they stabilized.

Tracy

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On Jan 17, 2014, at 11:06, Charlie England <ceengland7@gmail.com> wrote:

Time to order a muffler. My goal is to keep it inside the cowl (RV-7). I know, I know, but it looks better, and more important, it *sounds* better.

I believe that Dennis H. used this:
http://www.summitracing.com/parts/hsh-12412400/overview/
I know it sounds great. Dennis, do you remember the weight of just the resonator?

I know that Tracy is running an Aeroturbine (weight: 6 lbs on the 20B in the RV-8, & has talked about how good it sounds:
http://www.aeroexhaust.com/mufflers/aero-exhaust-at2525.html

They are roughly the same size and price, so I'm wondering how the Aeroturbine will compare in performance (meaning: killing the harsh harmonics of the rotary).

Tracy, you might be the only person who's heard both on a rotary. Based on your 20B experience, is it likely to work better than the Hushpower Resonator on a Renesis? I'll be using a manifold/transition pipe similar to Dennis' setup to keep everything inside the cowl.

Thanks,

Charlie



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