Return-Path: Received: from out009.verizon.net ([206.46.170.131] verified) by logan.com (CommuniGate Pro SMTP 4.1.8) with ESMTP id 3071741 for flyrotary@lancaironline.net; Wed, 10 Mar 2004 01:24:39 -0500 Received: from netzero.net ([4.12.145.173]) by out009.verizon.net (InterMail vM.5.01.06.06 201-253-122-130-106-20030910) with ESMTP id <20040310062439.MJTR29216.out009.verizon.net@netzero.net> for ; Wed, 10 Mar 2004 00:24:39 -0600 Message-ID: <404EB4A0.2000704@netzero.net> Date: Wed, 10 Mar 2004 01:24:32 -0500 From: Finn Lassen User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.4) Gecko/20030624 Netscape/7.1 (ax; PROMO) X-Accept-Language: en-us, en MIME-Version: 1.0 To: Rotary motors in aircraft Subject: Re: [FlyRotary] Re: EMU in the wild -> RV-3 engine mount References: In-Reply-To: Content-Type: multipart/alternative; boundary="------------090101020601080400070709" X-Authentication-Info: Submitted using SMTP AUTH at out009.verizon.net from [4.12.145.173] at Wed, 10 Mar 2004 00:24:39 -0600 This is a multi-part message in MIME format. --------------090101020601080400070709 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Russell Duffy wrote: > This is an RV-3B? > What happend the the triangular pieces running from bottom of spar, > between rudder pedals, up to engine mount bolts 5 and 6? I can't > beleive they were removed in the RV-3B. These two additional engine > mount bolts and stiffeners were added to the RV-3 after several engine > mount failures. > > Hi Finn, > > The plane is designated as an RV-3B, because it has the -B wings. The > actual project that I purchased was started over 20 years ago > (sn-751), and was prior to the -A designation. As you may recall, I > had to throw away the original wings, because the builder made some > life threatening mistakes. The original Lycoming mount did not have > the two additional bolts that you are referring too, but of course the > later planes do. > > The mount that I have was not made from the original Lycoming mount, > but rather designed from the ground up by Fred. It has a 5th mounting > point, and should not have the same problem that the original Lycoming > mounts had. > > Good eye BTW :-) > > Rusty I'm still concerned. It's not so much an engine mount issue as a landling gear leg issue.Top of gear leg tubes each got added the additional attach points to the firewall and from there stiffeners all the way back to the main spar. I guess I should have paid more attention to the firewall forward pitures. The RV-4 has them too. Gear shimmy or hard landings could break loose the top of the gear leg tubes. Finn --------------090101020601080400070709 Content-Type: text/html; charset=us-ascii Content-Transfer-Encoding: 7bit Russell Duffy wrote:

Message
This is an RV-3B?
What happend the the triangular pieces running from bottom of spar, between rudder pedals, up to engine mount bolts 5 and 6? I can't beleive they were removed in the RV-3B. These two additional engine mount bolts and stiffeners were added to the RV-3 after several engine mount failures.

Hi Finn,

The plane is designated as an RV-3B, because it has the -B wings. The actual project that I purchased was started over 20 years ago (sn-751), and was prior to the -A designation. As you may recall, I had to throw away the original wings, because the builder made some life threatening mistakes. The original Lycoming mount did not have the two additional bolts that you are referring too, but of course the later planes do.

The mount that I have was not made from the original Lycoming mount, but rather designed from the ground up by Fred. It has a 5th mounting point, and should not have the same problem that the original Lycoming mounts had.

Good eye BTW :-)

Rusty

I'm still concerned. It's not so much an engine mount issue as a landling gear leg issue.Top of gear leg tubes each got added the additional attach points to the firewall and from there stiffeners all the way back to the main spar. I guess I should have paid more attention to the firewall forward pitures. The RV-4 has them too. Gear shimmy or hard landings could break loose the top of the gear leg tubes.

Finn
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