X-Virus-Scanned: clean according to Sophos on Logan.com X-SpamCatcher-Score: 2 [X] Return-Path: Received: from imo-m20.mx.aol.com ([64.12.137.1] verified) by logan.com (CommuniGate Pro SMTP 5.1.8) with ESMTP id 2027581 for flyrotary@lancaironline.net; Sat, 05 May 2007 13:56:24 -0400 Received-SPF: pass receiver=logan.com; client-ip=64.12.137.1; envelope-from=Lehanover@aol.com Received: from Lehanover@aol.com by imo-m20.mx.aol.com (mail_out_v38_r9.2.) id q.cf1.ee66df2 (29679) for ; Sat, 5 May 2007 13:55:14 -0400 (EDT) From: Lehanover@aol.com Message-ID: Date: Sat, 5 May 2007 13:55:12 EDT Subject: Re: [FlyRotary] Was it Something I said? To: flyrotary@lancaironline.net MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="-----------------------------1178387712" X-Mailer: 9.0 Security Edition for Windows sub 5366 X-Spam-Flag: NO -------------------------------1178387712 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit In a message dated 5/5/2007 12:12:05 P.M. Eastern Daylight Time, eanderson@carolina.rr.com writes: Boy,all of a sudden I'm getting nothing on the list - banishment or weekend? Ed Ed Anderson Rv-6A N494BW Rotary Powered Matthews, NC No, but I thought of something else. The larger the TB, the greater the cross section per degree of shaft rotation. So if all is equal save diameter, the stumble from over-lean surge will always be greater from the larger TB. It will open to a larger cross section than any smaller TB in a smaller movement of the throttle. Conversely, the smaller TB amounts to opening the throttle more slowly for a similar amount of throttle movement. And since slower movement of the throttle is one strategy for avoiding the stumble problem, the smaller TB is already doing that without any thought from the pilot. The same thinking for the progressive 4 barrel carb. Two small holes to start, and as flow increases, two larger holes to get to top power. Lynn E. Hanover ************************************** See what's free at http://www.aol.com. -------------------------------1178387712 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable
In a message dated 5/5/2007 12:12:05 P.M. Eastern Daylight Time,=20 eanderson@carolina.rr.com writes:
<= FONT=20 style=3D"BACKGROUND-COLOR: transparent" face=3DArial color=3D#000000 size= =3D2>
Boy,all of a sudden I'm getting nothing on the lis= t -=20 banishment or weekend?
 
Ed
 
Ed Anderson
Rv-6A N494BW Rotary Powered
Matt= hews,=20 NC
No, but I thought of something else.
 
The larger the TB, the greater the cross section per degree of shaft=20 rotation. So if all is equal save diameter, the stumble from over-lean surge= =20 will always be greater from the larger TB. It will open to a larger cross=20 section than any smaller TB in a smaller movement of the throttle.=20 Conversely, the smaller TB amounts to opening the throttle more slowly for a= =20 similar amount of throttle movement. And since slower movement of the thrott= le=20 is one strategy for avoiding the stumble problem, the smaller TB is already=20 doing that without any thought from the pilot. The same thinking for the=20 progressive 4 barrel carb. Two small holes to start, and as flow increases,=20= two=20 larger holes to get to top power.
 
Lynn E. Hanover



See w= hat's free at AOL.= com.
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