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Date: Sat, 18 Jan 2014 10:56:33 -0600
From: Charlie England <ceengland7@gmail.com>
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To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Subject: Re: [FlyRotary] Re: muffler for Renesis?
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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
>
> Sent from my iPad
>
>> 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
>>>
>>> Sent from my iPad
>>>
>>>> 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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