X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from ispmxmta06-srv.windstream.net ([166.102.165.167] verified) by logan.com (CommuniGate Pro SMTP 5.1.11) with ESMTP id 2279473 for flyrotary@lancaironline.net; Wed, 22 Aug 2007 23:26:07 -0400 Received-SPF: pass receiver=logan.com; client-ip=166.102.165.167; envelope-from=montyr2157@alltel.net Received: from ispmxaamta04-gx.windstream.net ([71.29.241.244]) by ispmxmta06-srv.windstream.net with ESMTP id <20070823032528.FQZX29331.ispmxmta06-srv.windstream.net@ispmxaamta04-gx.windstream.net> for ; Wed, 22 Aug 2007 22:25:28 -0500 Received: from Thorstwin ([71.29.241.244]) by ispmxaamta04-gx.windstream.net with SMTP id <20070823032528.RYXO24166.ispmxaamta04-gx.windstream.net@Thorstwin> for ; Wed, 22 Aug 2007 22:25:28 -0500 Message-ID: <001001c7e535$428af9a0$6501a8c0@Thorstwin> From: "M Roberts" To: "Rotary motors in aircraft" Subject: Engine mounts Date: Wed, 22 Aug 2007 22:25:31 -0500 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_000D_01C7E50B.5989EA00" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.3138 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.3138 This is a multi-part message in MIME format. ------=_NextPart_000_000D_01C7E50B.5989EA00 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Robert, Funny you should ask. I have been working on this problem for a while. = Those devils at Mazda seem to have conspired to make the Renesis very = hard to design a mount for. They took away the point for a mount on top = of the engine. They moved the engine mount bolts all over the place and = put a lot of exhaust and plumbing in the way . It was as if they sat = down and said....how can we make this engine really really hard to = instal in an airplane. I would have to agree with Lynn on this one. I am going to use the plate = option. I will be modifying it so that it is lower profile. The plate = will be the size of the engine pan and the bolts will go in from the = side. The standard conical mounts will be on the sides as close to the = engine as I can get them. Imagine a hybrid between a bed mount and a P51 = beam mount. It is a difficult problem if you have a tight cowl. Don't rely on the engine mount to help you if you loose a prop blade!!=20 Put at least a 3/16 safety cable on the engine. =20 There are some design suggestions here: http://www.if1airracing.com/IF1DesignGuide2002R1.pdf (it is a huge PDF file so be forewarned) Monty ------=_NextPart_000_000D_01C7E50B.5989EA00 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

Robert,

Funny you should ask. I have been = working on this=20 problem for a while. Those devils at Mazda seem to have conspired = to make=20 the Renesis very hard to design a mount for. They took away the point = for a=20 mount on top of the engine. They moved the engine mount bolts all = over the=20 place and put a lot of exhaust and plumbing in the way . It was as if = they sat=20 down and said....how can we make this engine really really hard to = instal in an=20 airplane.

I would have to agree with Lynn on this = one. I am=20 going to use the plate option. I will be modifying it so that it is = lower=20 profile. The plate will be the size of the engine pan and the bolts will = go in=20 from the side. The standard conical mounts will be on the sides as close = to the=20 engine as I can get them. Imagine a hybrid between a bed mount and a P51 = beam=20 mount.

It is a difficult problem if = you have a tight=20 cowl.

Don't rely on the engine mount to help = you if you=20 loose a prop blade!!

Put at least a 3/16 safety cable = on the=20 engine.

There are some design suggestions=20 here:

http://www.= if1airracing.com/IF1DesignGuide2002R1.pdf

(it is a huge PDF file so be=20 forewarned)

Monty

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