Return-Path: Received: from fed1rmmtao03.cox.net ([68.230.241.36] verified) by logan.com (CommuniGate Pro SMTP 4.2.2) with ESMTP id 420401 for flyrotary@lancaironline.net; Sat, 18 Sep 2004 11:02:08 -0400 Received-SPF: none receiver=logan.com; client-ip=68.230.241.36; envelope-from=daveleonard@cox.net Received: from davidandanne ([68.111.224.107]) by fed1rmmtao03.cox.net (InterMail vM.6.01.03.04 201-2131-111-106-20040729) with SMTP id <20040918150128.JXZB8881.fed1rmmtao03.cox.net@davidandanne> for ; Sat, 18 Sep 2004 11:01:28 -0400 From: "DaveLeonard" To: "Rotary motors in aircraft" Subject: RE: [FlyRotary] Vertical Stab. question for RV builders Date: Sat, 18 Sep 2004 08:01:29 -0700 Message-ID: MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0031_01C49D55.B42DD4E0" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook IMO, Build 9.0.2416 (9.0.2910.0) In-Reply-To: X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 Importance: Normal This is a multi-part message in MIME format. ------=_NextPart_000_0031_01C49D55.B42DD4E0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit Hi Doug, I put in an 1/4" offset (front of the stab right for my 2.17:1 RD1-B drive). My engine mount is also offset 1.25 deg and I find that I still use a lot of rudder on take off and climb. I also need 3-4 pounds of rudder in fast cruise to keep the ball centered. Slow cruise (110 kts) I need no rudder. I will probably install a small trim tab. So I would probably recommend at least the 3/8" offset since I believe the conversion consepts mount is straight. If you are going to use the RD-1C drive. Besides offsetting the other way, the big prop you will be using puts the tips further out and increases that p-factor even more. JMHO Dave Leonard I am mounting the vertical stabilizer and I'm now to the point where I drill the forward attach point. I therefore was wondering if I should center it along the fuselage center line or go with Van's recommended setting? I am using a conversion concepts mount. Thanks for your input. Doug Lomheim 90116, RV-9A /13B OK City, OK ------=_NextPart_000_0031_01C49D55.B42DD4E0 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable

Hi Doug, I put = in an 1/4"=20 offset (front of the stab right for my 2.17:1 RD1-B drive). = My=20 engine mount is also offset 1.25 deg and I find that I still use a lot = of rudder=20 on take off and climb. I also need 3-4 pounds of rudder in fast = cruise to=20 keep the ball centered. Slow cruise (110 kts) I need no = rudder. =20 I will probably install a small trim tab.

So I would = probably=20 recommend at least the 3/8" offset since I believe the conversion = consepts mount=20 is straight.

If you are = going to use=20 the RD-1C drive. Besides offsetting the other way, the big prop = you will=20 be using puts the tips further out and increases that p-factor even=20 more.

JMHO = Dave=20 Leonard

I am mounting the vertical stabilizer and I'm now to the point = where I=20 drill the forward attach point. I therefore was wondering if I = should=20 center it along the fuselage center line or go with Van's recommended=20 setting? I am using a conversion concepts mount.

Thanks for your input.

Doug Lomheim

90116, RV-9A /13B

OK City, OK

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