X-Virus-Scanned: clean according to Sophos on Logan.com From: "William Jepson" Received: from mail-vk0-f50.google.com ([209.85.213.50] verified) by logan.com (CommuniGate Pro SMTP 6.1.12) with ESMTPS id 9043183 for flyrotary@lancaironline.net; Mon, 17 Oct 2016 19:34:53 -0400 Received-SPF: pass receiver=logan.com; client-ip=209.85.213.50; envelope-from=wrjjrs@gmail.com Received: by mail-vk0-f50.google.com with SMTP id b186so197068332vkb.1 for ; Mon, 17 Oct 2016 16:34:52 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:from:date:message-id:subject:to; bh=ByJ39ue4AbWVVOrPQDqQG7DdqB+E6xmMvC6RFx4gk9c=; b=i4XihSpZkdYpsNaKzX3qdYE9r9wHCHAqJMvq2plEcCMclzaZ22WT7yhLhx/2yr5p+m cvY9dhI3npkbes/DcdNyhxKiG3FpExGXo0snjqaHSgZRW6h63ANELkJ7czd7fkvxOn+0 zEA18wd4BBouuHuPr/d3EEMWvdVUaKYBsCUxxyR33rXLUiwLzTKOQXjaP2XPAW/olKv+ H3hv15zfEW5dniy+7oTv0NF4OH5Ug2aYENE120UK5+HL9lP/XFHWwaasbNYrlxJiV7dg +AvoIIymkHKMYDK2IgFGyiTH83D2TMg/9SrV7oB/qWBK7gSxfTWYzJRIp/Rw131tZVqk ierg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:from:date :message-id:subject:to; bh=ByJ39ue4AbWVVOrPQDqQG7DdqB+E6xmMvC6RFx4gk9c=; b=WUW/OYz98Hd7jxsJGZOIke49nO32GrEy6GYfCWdpchMR+smEOhXhHr3/YK0YpGHV2V YWRPmIgrXAFwr0ZuwAa+g9zG+9AzbCsKqqGjYbvj3qWt4l9EmKKKwmpJssaJu54nt0Jd zmmq0LI1KruyI1ugmBvXR4Lt2UCj4dV4UtZmXW/uIbc6j4FMI8wM3AUyZT1vAw2yHNdq hIM7IWCr8xJCNfutRKdTm0RKLF2PnuGmg0kjnlMhGDiDLHaDGiEO4RStQa29Hs1kci4M tTPV0mH1Kh3vNvDCVZayTLvJFq2GF3wHpT2OJ9XxS80W1acvKEK5ZTf2DJ7eUaMTcKzi +WQQ== X-Gm-Message-State: AA6/9RnevCduTPG2GAG8zCQy8bgrJeUcQM7bLyVuZUcYrZomdd5a4GJufI4nFxPVfc+AQM3DRc4fp4bRm0RXcQ== X-Received: by 10.31.227.129 with SMTP id a123mr2365vkh.65.1476747274625; Mon, 17 Oct 2016 16:34:34 -0700 (PDT) MIME-Version: 1.0 Received: by 10.103.81.201 with HTTP; Mon, 17 Oct 2016 16:34:34 -0700 (PDT) In-Reply-To: References: Date: Mon, 17 Oct 2016 16:34:34 -0700 Message-ID: Subject: Re: [FlyRotary] Re: Just a bit of a update To: Rotary motors in aircraft Content-Type: multipart/alternative; boundary=001a114da690ba25c7053f180427 --001a114da690ba25c7053f180427 Content-Type: text/plain; charset=UTF-8 Neil, The muffler in the video. It was designed using Helmholtz principles and it works very well at reducing the high frequencies from the rotary. Bill On Mon, Oct 17, 2016 at 4:18 PM, Neil Unger wrote: > Bill, Now you have got my interest, What muffler and where?? Everything > else on the Rotary can be handled, Cooling, mounting, P porting etc, but > mufflers have me beaten. They are the next for me to investigate > particularly how to keep small if possible, The size in most cases affects > how the engine mount can be constructed on that side. > > Thanks in anticip[ation, Neil. > > On 10/18/2016 9:58 AM, William Jepson wrote: > > Charlie, > Pardon my haste in the original reply. The butterflies are very similar to > the original, with the exception that we have devised a new way to make > them that doesn't require drilling through the housings. Can't say more > right now other than we do NOT use epoxy in the housings and NO sealing > problems. Don't expect any. Also we DO NOT weld to the liner as sometimes > pushed by others. I do not believe you can weld to the liner without > catastrophic failure later. I believe you will either fail your apex seals > or crack the weld due to crystallization of the steel. The muffler is a > MAJOR win. It is quieter than a unmuffled Lyc, and successfully kills the > annoying hi frequencies. It is more restrictive than some but only costs us > a few HP. It also fits in an RV-3! I am experimenting with a larger version > in hopes of repeating the success with a bit less restriction on cowls that > aren't as tight as the RV-3 > Bill > > On Mon, Oct 17, 2016 at 3:15 PM, Charlie England < > flyrotary@lancaironline.net> wrote: > >> Hi Bill, >> >> Thanks for the link. I've been following it on the Homebuilt Airplanes >> forum; are you 'billsrv4' over there? >> >> I've been trying to find a throttle mechanism in the video, but don't see >> one. Are they using the custom 'in the housing' butterflies, like the >> original Powersport engine? >> >> Have you heard it run in person? If so, does the muffler work as well as >> it seems to in the video? (Hard to know how much the audio is clipped in >> level on a recording.) >> >> Thanks, >> >> Charlie >> >> On Mon, Oct 17, 2016 at 4:52 PM, William Jepson < >> flyrotary@lancaironline.net> wrote: >> >>> Since it has been so quiet thought I would make some noise. >>> Try this package on for size. >>> https://www.youtube.com/watch?v=EfreUJt-Fsk. >>> Think you will find it interesting. >>> Bill >>> >> >> > > --001a114da690ba25c7053f180427 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable
Neil,
The muffler in the video. It was designed using = Helmholtz principles and it works very well at reducing the high frequencie= s from the rotary.
Bill
On Mon, Oct 17, 2016 at 4:18 PM, Neil Unger <flyrotary@lancaironline.net> wrote:
=20 =20 =20

Bill,=C2=A0 Now you have got my interest,=C2=A0 What muffler and whe= re??=C2=A0 Everything else on the Rotary can be handled,=C2=A0 Cooling, mounting= , P porting etc, but mufflers have me beaten.=C2=A0 They are the next f= or me to investigate particularly how to keep small if possible,=C2=A0 T= he size in most cases affects how the engine mount can be constructed on that side.

Thanks in anticip[ation,=C2=A0 Neil.=C2=A0


On 10/18/2016 9:58 = AM, William Jepson wrote:
Charlie,
Pardon my haste in the original reply. The butterflies are very similar to the original, with the exception that we have devised a new way to make them that doesn't require drilling through the housings. Can't say more right now other than we do NOT use epoxy in the housings and NO sealing problems. Don't expect any. Also we DO NOT weld to the liner as sometimes pushed by others. I do not believe you can weld to the liner without catastrophic failure later. I believe you will either fail your apex seals or crack the weld due to crystallization of the steel. The muffler is a MAJOR win. It is quieter than a unmuffled Lyc, and successfully kills the annoying hi frequencies. It is more restrictive than some but only costs us a few HP. It also fits in an RV-3! I am experimenting with a larger version in hopes of repeating the success with a bit less restriction on cowls that aren't as tight as the RV-3
Bill

On Mon, Oct 17, 2016 at 3:15 PM, Charlie England <flyrotary@lancaironline.net> wrote:
Hi Bill,

Thanks for the link. I've been following it on the Homebuilt Airplanes forum; are you 'billsrv4' over there?

I've been trying to find a throttle mechanism in the video, but don't see one. Are they using the custom = 9;in the housing' butterflies, like the original Powersport engine?=C2=A0

Have you heard it run in person? If so, does the muffler work as well as it seems to in the video? (Hard to know how much the audio is clipped in level on a recording.)

Thanks,

Charlie

On Mon, Oct 17, 2016 at 4:52 PM, William Jepson <flyrotary@lancaironline.= net> wrote:
Since it has been so quiet thought I would make some noise.
Try this package on for size.
Think you will find it interesting.
Bill




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