X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from rv-out-0506.google.com ([209.85.198.230] verified) by logan.com (CommuniGate Pro SMTP 5.2.10) with ESMTP id 3287653 for flyrotary@lancaironline.net; Wed, 12 Nov 2008 14:08:14 -0500 Received-SPF: pass receiver=logan.com; client-ip=209.85.198.230; envelope-from=rwstracy@gmail.com Received: by rv-out-0506.google.com with SMTP id f6so579434rvb.7 for ; Wed, 12 Nov 2008 11:07:35 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:received:received:message-id:date:from:sender :to:subject:in-reply-to:mime-version:content-type:references :x-google-sender-auth; bh=kQ9vKXCOm7wEOX8aIGtLIy/xO2gAuSQB6dbbabTnn8w=; b=iWxpxDMoibXdkP0vGHdKujzQD+RCqiC6fr04tjnpRoQPCSqn3JTYHBM/WRTrDizCzr vC3cdr3VaJkGE58vEY7EvjzOodMNqInpIYSEYYzS6YJwWc208s3kfxB01ZWsqwwYa+c9 3k9AJoCYSVrhbNW9DCVtlwwz1a9gOTFVmL2Tw= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=message-id:date:from:sender:to:subject:in-reply-to:mime-version :content-type:references:x-google-sender-auth; b=sZrPfiHQfD/wrf30tNJMpqoKxowFeYq+xGxXfRo8cr3+6LosMN2pN6xr4rJqltFNVy fzXhZ6Mv805Gca1jebOmnPF95KR8TwdaYDgyVx9KzMhbPCc0e6IUy9vGuOL31b5v4NFm 6E72gkReGHzFHoEvgVyCRfmCLjyKnUzfHRDtI= Received: by 10.140.125.19 with SMTP id x19mr5045996rvc.171.1226516855785; Wed, 12 Nov 2008 11:07:35 -0800 (PST) Received: by 10.141.133.12 with HTTP; Wed, 12 Nov 2008 11:07:35 -0800 (PST) Message-ID: <1b4b137c0811121107t446b9122v98ce1262590540aa@mail.gmail.com> Date: Wed, 12 Nov 2008 14:07:35 -0500 From: "Tracy Crook" Sender: rwstracy@gmail.com To: "Rotary motors in aircraft" Subject: Re: [FlyRotary] Re: rv8 engine mount In-Reply-To: MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_Part_11172_27402741.1226516855785" References: X-Google-Sender-Auth: 383627a3c994498c ------=_Part_11172_27402741.1226516855785 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Content-Disposition: inline I am using the James Aircraft cowl (lyc version) but I don't think the cowl would make any difference with the IVO. (the air sees the prop first) The IVO does seem to work better on pushers since the airflow is already turbulent around the hub. Tracy On Wed, Nov 12, 2008 at 9:41 AM, wrote: > On that note, Tracy (or anyone). Do you think the use of the Sam James > rotary cowl would make a difference with regards to the IVO prop? I recall > you had some problems with flow around the root of the prop. I was > considering this prop until I read your findings. > > Bryan > > -------------- Original message from "Tracy Crook" < > tracy@rotaryaviation.com>: -------------- > > Best I could measure, the stock dimension is 37.5" Mine is close to 40" > due to the extra length of the 20B. I simply glassed a round collar > extension behind the prop spinner to get the extra length. I think this > improved the looks and getting the prop further away from the cowl is > aerodynamically better. > > Tracy Crook > > > On Tue, Nov 11, 2008 at 11:48 PM, Blake Lewis wrote: > >> Tracy or others building RV8s, >> What is the stock distance from firewall to prop flange on the RV8, >> and/or what is the distance your using? >> >> -- >> Blake C. Lewis >> >> -- >> Homepage: http://www.flyrotary.com/ >> Archive and UnSub: >> http://mail.lancaironline.net:81/lists/flyrotary/List.html >> > > ------=_Part_11172_27402741.1226516855785 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Content-Disposition: inline I am using the James Aircraft  cowl (lyc version) but I don't think the cowl would make any difference with the IVO.  (the air sees the prop first)  The IVO does seem to work better on pushers since the airflow is already turbulent around the hub.

Tracy 

On Wed, Nov 12, 2008 at 9:41 AM, <bryanwinberry@bellsouth.net> wrote:
On that note, Tracy (or anyone).  Do you think the use of the Sam James rotary cowl would make a difference with regards to the IVO prop?  I recall you had some problems with flow around the root of the prop.  I was considering this prop until I read your findings.

Bryan 
-------------- Original message from "Tracy Crook" <tracy@rotaryaviation.com>: --------------

Best I could measure, the stock dimension is 37.5"   Mine is close to 40" due to the extra length of the 20B.  I simply glassed a round collar extension behind the prop spinner to get the extra length.  I think this improved the looks and getting the prop further away from the cowl is aerodynamically better.

Tracy Crook
 

On Tue, Nov 11, 2008 at 11:48 PM, Blake Lewis <blake.lewis@gmail.com> wrote:
Tracy or others building RV8s,
What is the stock distance from firewall to prop flange on the RV8,
and/or what is the distance your using?

--
Blake C. Lewis

--
Homepage:  http://www.flyrotary.com/
Archive and UnSub:   http://mail.lancaironline.net:81/lists/flyrotary/List.html


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