X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from fed1rmmtao104.cox.net ([68.230.241.42] verified) by logan.com (CommuniGate Pro SMTP 5.2.16) with ESMTP id 3864134 for flyrotary@lancaironline.net; Wed, 23 Sep 2009 23:41:35 -0400 Received-SPF: none receiver=logan.com; client-ip=68.230.241.42; envelope-from=rv-4mike@cox.net Received: from fed1rmimpo01.cox.net ([70.169.32.71]) by fed1rmmtao104.cox.net (InterMail vM.8.00.01.00 201-2244-105-20090324) with ESMTP id <20090924034100.CGCG14181.fed1rmmtao104.cox.net@fed1rmimpo01.cox.net> for ; Wed, 23 Sep 2009 23:41:00 -0400 Received: from wills ([68.105.90.215]) by fed1rmimpo01.cox.net with bizsmtp id kTgx1c00B4emyWU03Tgzn0; Wed, 23 Sep 2009 23:40:59 -0400 X-VR-Score: 0.00 X-Authority-Analysis: v=1.0 c=1 a=-IFq7gWc-R8A:10 a=3oc9M9_CAAAA:8 a=Ia-xEzejAAAA:8 a=GuPC6JO1AAAA:8 a=pGLkceISAAAA:8 a=kviXuzpPAAAA:8 a=HHGDD-5mAAAA:8 a=7g1VtSJxAAAA:8 a=yy9RGSIkVJsJI6gWN2QA:9 a=WnUpVqC3u4iUrnSQUFcA:7 a=RKJHnfCIKnUND5XoUesPQUfoHdEA:4 a=U8Ie8EnqySEA:10 a=EzXvWhQp4_cA:10 a=MSl-tDqOz04A:10 a=4vB-4DCPJfMA:10 a=i1zE5R4R5dEA:10 X-CM-Score: 0.00 Message-ID: <95D01BCA51EE4B13A61F52A127FB04BD@wills> From: "Mike Wills" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Noise reduction (was) nothing to report Date: Wed, 23 Sep 2009 20:40:58 -0700 MIME-Version: 1.0 Content-Type: text/plain; format=flowed; charset="iso-8859-1"; reply-type=response Content-Transfer-Encoding: 7bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.5843 X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2900.5579 Thanks for the info. The website emphasizes effectiveness at low freqs. I wonder how they handle the higher freqs? Not clear how well these would work with the rotary. Mike Wills RV-4 N144MW ----- Original Message ----- From: "Phil White" To: "Rotary motors in aircraft" Sent: Wednesday, September 23, 2009 11:20 AM Subject: [FlyRotary] Noise reduction (was) nothing to report > 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 >> 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 > > 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 >> Date: >> Mon, 21 Sep 2009 07:41:57 -0700 >> >> >> Mark, >> >> Which ANR do you use? >> >> Best Regards, >> >> Steve Thomas >> _______________________________________________________ >> >> > > -- > Homepage: http://www.flyrotary.com/ > Archive and UnSub: > http://mail.lancaironline.net:81/lists/flyrotary/List.html >