X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml Date: Wed, 18 Nov 2009 09:33:27 -0500 Message-ID: X-Original-Return-Path: Received: from web81505.mail.mud.yahoo.com ([68.142.199.145] verified) by logan.com (CommuniGate Pro SMTP 5.3c2) with SMTP id 3980664 for lml@lancaironline.net; Wed, 18 Nov 2009 08:26:13 -0500 Received-SPF: none receiver=logan.com; client-ip=68.142.199.145; envelope-from=kneadedpleasures@sbcglobal.net Received: (qmail 34581 invoked by uid 60001); 18 Nov 2009 13:25:36 -0000 DomainKey-Signature:a=rsa-sha1; q=dns; c=nofws; s=s1024; d=sbcglobal.net; h=Message-ID:X-YMail-OSG:Received:X-Mailer:Date:From:Subject:To:MIME-Version:Content-Type; b=m4S39A7MS/Nukm5lXoTJT6VtyqvhM9j7YO17/KDfYnFPUu+MmdYLN6SLph3v248LRfzOZmXHW3RJAwiGv8eRAYKMHib2SBw65DIr45sBbgO60grKdmqbcKr/+swL3335E/caY4lnmDlxf+uOYY6WS4o7Zhmudc4rm8Jnr2ZUbCc=; X-Original-Message-ID: <905859.32170.qm@web81505.mail.mud.yahoo.com> X-YMail-OSG: 9C8Eda8VM1lYeGMNfg7DskZwOr0TDlCVMe3umVHjdsab7BL9gTQ0Ef5DSwJxcvHL_E85OyFil6kfds_ke1mALYcFi8tslA6VF.uPYWIMB4whKVt4zZY3fIzetT57zkbVWbjiDOZh2ufOWsj0UbOq9NJzoAolvL3MexbvAAzjhswkJyKxDsh.4B.rBU1RNb.8TssQqIBd.yOkHSYxcqik9cMFvkCe5UubKNue5GKFym9kWrf_eFztR_tQ15xbraP9g7J5g9ou0XTMzhfsJ04pYaOwjdxol3iBnRhyemrP8gmbLQ-- Received: from [71.145.142.157] by web81505.mail.mud.yahoo.com via HTTP; Wed, 18 Nov 2009 05:25:36 PST X-Mailer: YahooMailRC/211.6 YahooMailWebService/0.7.361.4 X-Original-Date: Wed, 18 Nov 2009 05:25:36 -0800 (PST) From: kneaded pleasures Subject: harmonic balancer??? X-Original-To: Lancair List MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="0-1859783498-1258550736=:32170" --0-1859783498-1258550736=:32170 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Tom Wiliams wrote:=C2=A0 =0A=C2=A0=0A"I have a friend with a 320 which is t= ail heavy.=C2=A0 Can=E2=80=99t have 2 people or full fuel without going out= of aft CG.=C2=A0 I remember someone talking about a harmonic balancer that= was about 12 lbs and attached to the flywheel or spinner.=C2=A0 That would= help him a lot if I could find one.=C2=A0 Any ideas???" =0A=0ATom:=C2=A0 I= have an "harmonic dampener" installed on my 360.=C2=A0 It weighs exactly 1= 7 pounds but=C2=A0one like=C2=A0it installed on your plane=C2=A0could easil= y weigh more or less - it should be sized to optimize your weight/balance r= equirements.=C2=A0 If you=C2=A0use an hydraulic constant speed prop, this a= rrangement won't work for you;=C2=A0 it does well=C2=A0on my 360 because I = use a very light weight electric constant speed prop so I don't need=C2=A0o= il pressure from the engine.=C2=A0 (I use slip rings to transfer battery vo= ltage to the prop.)=0A=0AIf you are currently using either a fixed-pitch or= electric prop, perhaps you can=C2=A0have a=C2=A0balancer/dampener made for= your plane and mount it directly to the prop flange.=C2=A0 My dampener=C2= =A0was made by a reputable local machine shop and it fit perfectly and tigh= tly on the very first installation to my 360 (cost, $140.00).=C2=A0 I now h= ave 400 hours on it since initial installation and am very pleased.=C2=A0 I= t also helps=C2=A0at engine start because its spinning mass helps to overco= me compression resistance.=C2=A0=C2=A0=C2=A0=C2=A0 Greg Nelson=C2=A0=C2=A0 --0-1859783498-1258550736=:32170 Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: quoted-printable

Tom Wilia= ms wrote:

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"I have a friend with a 320 which is tail heavy. Can=E2=80=99t ha= ve 2 people or full fuel without going out of aft CG. I remember some= one talking about a harmonic balancer that was about 12 lbs and attached to= the flywheel or spinner. That would help him a lot if I could find o= ne. Any ideas???"

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Tom: = I have an "harmonic dampener" installed on my 360. It weighs exactly= 17 pounds but one like it installed on your plane could eas= ily weigh more or less - it should be sized to optimize your weight/balance= requirements. If you use an hydraulic constant speed prop, this= arrangement won't work for you; it does well on my 360 because = I use a very light weight electric constant speed prop so I don't need = ;oil pressure from the engine. (I use slip rings to transfer battery = voltage to the prop.)

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If you are currently= using either a fixed-pitch or electric prop, perhaps you can have a&n= bsp;balancer/dampener made for your plane and mount it directly to the prop= flange. My dampener was made by a reputable local machine shop = and it fit perfectly and tightly on the very first installation to my 360 (= cost, $140.00). I now have 400 hours on it since initial installation= and am very pleased. It also helps at engine start because its = spinning mass helps to overcome compression resistance. &n= bsp; Greg Nelson

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