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Date: Wed, 23 Sep 2009 13:20:55 -0500
From: Phil White <philwhite9@aol.com>
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To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Subject: Noise reduction (was) nothing to report
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Mike, Mark; and all you going deaf with noisy Rotary engines:
    I have 2 sets of Halo Tubephones from Quiet Technologies, that 
provide about 30 dB of quieting at 125 Hz, and up to 45 dB at 4,000 Hz 
and higher.  They sell for $360 each at www.quiettechnologies.com, or 
their booth at OSH.

    Not connected in any way to them.  Just a satisfied customer, 
especially after flying with my brother who was using his $1,000 Bose 
headset.  We swapped, and both of us found the light Tubephones to be 
quieter and more comfortable.

Phil
RV-10 20B in Downers Grove, IL  engine + cowling on, lotsa plumbing + 
wiring to go
>
> Subject:
> Re: [FlyRotary] nothing to report...
> From:
> Mark Steitle <msteitle@gmail.com>
> Date:
> Mon, 21 Sep 2009 07:26:25 -0500
>
>
> Good report Mike.  I know what you mean about a quieter muffler.  My 
> ANR headset does a good job of killing the low frequencies, but a poor 
> job on the higher frequencies.  The rotary has both.  So take your 
> pick, turn the ANR on and listen to the high frequencies, or turn it 
> off and listen to the low rumble.  If I could only find an ANR that 
> can do both I would be a happy camper. 
>  
> Mark
>
> On Sun, Sep 20, 2009 at 10:55 PM, Mike Wills <rv-4mike@cox.net 
> <mailto:rv-4mike@cox.net>> wrote:
>
>     I added another 1.3 hours to my total flight time today. And for
>     the first time I landed and was completely satisfied with the
>     flight. I'd still like to quiet it down a little, but this was the
>     first flight where I didnt feel like there was anything that had
>     to be fixed before the next flight. Even the landing was pretty
>     decent.
>      
>     I've got just over 9 hours of flight time and about 40 hours of
>     engine run time now. So far all of my flight time has been
>     directly over the airport because to venture away requires flying
>     over about 50 miles of mostly unlandable mountainous terrain. But
>     I'm starting to think seriously about stretching the legs a little...
>      
>     Mike Wills
>     RV-4 N144MW
>
>
>
> ------------------------------------------------------------------------
>
> Subject:
> Re: [FlyRotary] Re: nothing to report...
> From:
> Steve Thomas <glasair2@me.com>
> Date:
> Mon, 21 Sep 2009 07:41:57 -0700
>
>
> Mark,
>
> Which ANR do you use?
>
> Best Regards,
>
> Steve Thomas
> _______________________________________________________
>
>