X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Thu, 25 Jul 2013 20:46:42 -0400 Message-ID: X-Original-Return-Path: Received: from smtp1v2.av-mx.com ([137.118.16.32] verified) by logan.com (CommuniGate Pro SMTP 6.0.5) with ESMTP id 6391284 for lml@lancaironline.net; Thu, 25 Jul 2013 18:32:16 -0400 Received-SPF: pass receiver=logan.com; client-ip=137.118.16.32; envelope-from=pinetownd@volcano.net Received: from localhost (localhost [127.0.0.1]) by smtp1v2.av-mx.com (Postfix) with ESMTP id 9185240025F for ; Thu, 25 Jul 2013 18:31:41 -0400 (EDT) X-Virus-Scanned: amavisd-new at av-mx.com Received: from smtp1v2.av-mx.com ([127.0.0.1]) by localhost (smtp1v2.av-mx.com [127.0.0.1]) (amavisd-new, port 10124) with ESMTP id kYxH5ol5lPIK for ; Thu, 25 Jul 2013 18:31:38 -0400 (EDT) Received: from DennisPC (65-174-1-67.dsl.volcano.net [65.174.1.67]) (Authenticated sender: pinetownd@volcano.net) by smtp1v2.av-mx.com (Postfix) with ESMTPA for ; Thu, 25 Jul 2013 18:31:38 -0400 (EDT) X-Original-Message-ID: From: "Dennis Johnson" X-Original-To: "Lancair Mailing List" References: In-Reply-To: Subject: Re: [LML] Re: Potential Problem-Engine Vibration X-Original-Date: Thu, 25 Jul 2013 15:31:41 -0700 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_3778_01CE894C.0FA897B0" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Windows Mail 6.0.6002.18197 X-MimeOLE: Produced By Microsoft MimeOLE V6.0.6002.18463 This is a multi-part message in MIME format. ------=_NextPart_000_3778_01CE894C.0FA897B0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable I have a smooth running Legacy RG IO-550 with a three blade Hartzell = scimitar prop, HC-J3YF-1RF/F7391D-3/SM7. =20 According to Hartzell's website, this is the recommended three blade = scimitar prop for the Legacy RG with IO-550 engine. It is a 72" = diameter prop, not the 78" prop mentioned in Bob R's posting. I thought = all the scimitar props on Legacys were the same as mine. http://hartzellprop.com/pilots/kit-builders/legacy-2000-io-550-n-3-blade/= I consider mine to be "smooth," but that is a terribly subjective = concept. However, I can say for sure that I do not feel vibration in = the stick and don't see any aileron vibration or wing tip vibration. = Another Legacy builder and pilot commented on how smooth mine is, but = maybe he was just being polite. =20 Unless there is a way to quantify "vibration" and "smoothness," I don't = see how we can accurately communicate about this. One person's rough = could be another person's smooth. Maybe if someone had a video of stick = shake or aileron shake? A glass of water sitting on the glare shield?=20 Dennis Legacy 625 hours =20 =20 =20 ------=_NextPart_000_3778_01CE894C.0FA897B0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

I have a smooth running Legacy RG IO-550 with a three blade = Hartzell=20 scimitar prop, HC-J3YF-1RF/F7391D-3/SM7.

According to Hartzell's website, this is the recommended three = blade=20 scimitar prop for the Legacy RG with IO-550 engine. It is a 72" = diameter=20 prop, not the 78" prop mentioned in Bob R's posting. I thought all = the=20 scimitar props on Legacys were the same as mine.

http://hartzellprop.com/pilots/kit-builders/legacy-2000-io-550-= n-3-blade/

I consider mine to be "smooth," but that is a terribly subjective=20 concept. However, I can say for sure that I do not feel vibration = in the=20 stick and don't see any aileron vibration or wing tip=20 vibration. Another Legacy builder and pilot commented on how = smooth=20 mine is, but maybe he was just being polite.

Unless there is a way to quantify "vibration" and "smoothness," I = don't see=20 how we can accurately communicate about this. One person's rough = could be=20 another person's smooth. Maybe if someone had a video of = stick shake=20 or aileron shake? A glass of water sitting on the glare=20 shield?

Dennis

Legacy 625 hours

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