X-Junk-Score: 0 [] X-Cloudmark-Score: 0 [] X-Cloudmark-Analysis: v=2.2 cv=UschDK4B c=1 sm=1 tr=0 a=qClb9Ql7wM4GXenlcXDlgg==:117 a=7ZeHUF5TpD32QnDE67vapA==:17 a=x7bEGLp0ZPQA:10 a=A-0mRrAPPO4A:10 a=JHtHm7312UAA:10 a=r77TgQKjGQsHNAKrUKIA:9 a=3oc9M9_CAAAA:8 a=Ia-xEzejAAAA:8 a=_6GpL_ENAAAA:8 a=HMn8_nfXR8XjDnqCIvQA:9 a=QEXdDO2ut3YA:10 a=Rkptbut9y_AA:10 a=4PR2P7QzAAAA:8 a=dTB8JBgP3TvA9fyNDQwA:9 a=a0PxlnwD6dhK_x8w:21 a=_W_S_7VecoQA:10 a=Urk15JJjZg1Xo0ryW_k8:22 a=4dqwQCo7Po2mVW515mGf:22 From: "Charlie England ceengland7@gmail.com" Received: from mail-yb1-f174.google.com ([209.85.219.174] verified) by logan.com (CommuniGate Pro SMTP 6.2.9) with ESMTPS id 11833135 for flyrotary@lancaironline.net; Thu, 01 Nov 2018 15:19:11 -0400 Received-SPF: pass receiver=logan.com; client-ip=209.85.219.174; envelope-from=ceengland7@gmail.com Received: by mail-yb1-f174.google.com with SMTP id n140-v6so8591945yba.1 for ; Thu, 01 Nov 2018 12:19:12 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=subject:to:references:from:message-id:date:user-agent:mime-version :in-reply-to:content-language; bh=ox2eiHcE9ESpANPblE3akCQ01iYofylF8Ny6JKuvTsc=; b=dvONLNFOQN3k8M6JCtNu3nJ99ZHe7RwDHUfzGPvgxAMP9YQnFa7aZClxDUX1OHxMcB Z4J/ORwAX1L95pUMxVZEHYWMtMJ9ihAkaVlLM5TfUtcgvmnJ5rvju2tYUmWlln+fxQ63 equJFSywm2p1YMGwG/QcDCFTGh6Sw/11PgtFfQm8qQ6fSZD8fIONmgxvj9seoamRGSJr 5VPAc/o2vthn4pyC8uhSXk5yw84eF405EKv3b7dt3Kqs6+T9A6Mp3gaN2ydsI2wx05fy SVstiOWrkSQ0rXQZWjli7keUCoH1uiHhSeJQhmpolKuE3lH3/F+KYokN1+fTxWb11VuY oPkw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:to:references:from:message-id:date :user-agent:mime-version:in-reply-to:content-language; bh=ox2eiHcE9ESpANPblE3akCQ01iYofylF8Ny6JKuvTsc=; b=irEZ3AvN5Beqn0PELVqmOfviv1lHFTkuxcRqG3eLWblYmGplQ9lyrzItHEzsW3eKzJ v4fBRG3/HLlEiV9dN0lElXA5r4dJUwR745r5DMLm0cgDXX8lDTHp5QJjIKyUUd7U0aDY 3IkG5ILJRGHvoqNh3/3kjkxv8x00uZM85uhGErD6a/dlhO7jR9z3j8kOBH478sWAeRBu 6irq2SGDUtmtZoEeuAjahfqC8Ip7gWCxxyE/4rzKTcVSYT3afxpp02Q66aalhb9fDuUg jkCROS2ZvMcFkbiZzoenZyYkrcuZzQyP4dBcQhgxuC8qFFMXv0sGP49Orwc5HH2iEQWr KCfw== X-Gm-Message-State: AGRZ1gIYIpCpmtopB/XP0kPvkSRFjSuhh2gXK9TYcQyoS/EqJsW20uHq SuWhY8kK2h/UpgPBz196B6Addkfa X-Google-Smtp-Source: AJdET5fzOWLnVzPsUcA72wL/xSHnLzXuqd5YJI8Ow+YfnpUwp//tvSrfpW1wWCTXYl+LFGofGGgnhg== X-Received: by 2002:a25:2d5e:: with SMTP id s30-v6mr8695981ybe.349.1541099934231; Thu, 01 Nov 2018 12:18:54 -0700 (PDT) Return-Path: Received: from [192.168.10.219] (mobile-166-170-53-207.mycingular.net. [166.170.53.207]) by smtp.googlemail.com with ESMTPSA id g21-v6sm12264910ywk.5.2018.11.01.12.18.53 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 01 Nov 2018 12:18:53 -0700 (PDT) Subject: Re: [FlyRotary] Re: Flexplate location / failure To: Rotary motors in aircraft References: Message-ID: Date: Thu, 1 Nov 2018 14:21:04 -0500 User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:52.0) Gecko/20100101 Thunderbird/52.9.1 MIME-Version: 1.0 In-Reply-To: Content-Type: multipart/alternative; boundary="------------42E862571BCFC1964F23771B" Content-Language: en-US X-Antivirus: Avast (VPS 181101-6, 11/01/2018), Outbound message X-Antivirus-Status: Clean This is a multi-part message in MIME format. --------------42E862571BCFC1964F23771B Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 8bit On 11/1/2018 2:09 PM, lehanover lehanover@aol.com wrote: > > > In a message dated 11/1/2018 2:57:48 PM Eastern Standard Time, > flyrotary@lancaironline.net writes: > > > > In a message dated 11/1/2018 2:30:33 PM Eastern Standard Time, > flyrotary@lancaironline.net writes: > > On 11/1/2018 12:58 PM, lehanover lehanover@aol.com > wrote: > > > > On the racer, I built a small steel flywheel > just big enough to fit up a 5 1/4" Tilton dual > disc clutch pack. The front side needed to > have about 1/4" spigot so as to clear the flex > plate which has a slight conical shape.  I > just bolted the flywheel on over the flex > plate. Never a problem on the 95 RX-7. a big > problem on a sports racer I built. The driver > defeated the rev limiter by shifting into 1st > rather than 3rd while already turning about > 9,500 RPM. The transmission was a Hewland > FT-200, dog ring style, so it went right into > the selected gear. The flex plate has only 6 > welds to keep the ring gear on the flex plate. > The ring gear broke next to one weld. The free > end tried to machine the bell housing into 2 > pieces. The ring gear also rolled outboard > about 30 degrees. It wanted out and almost > made it. > > On the replacement ring gear I TIG welded an > additional 6 welds and added 12 welds to the > back of the ring gear. > > Since you do not need a wear surface for the > airplane installation, just a piece of > aluminum plate could be used to produce a > similar flywheel. The flex plate is just used > to start the engine and delivers no torque > loads to the gear box. > > Lynn E. Hanover > > Len, if Tracy's damper plate is used, it bolts to the flex > plate, just inside of the ring gear. So for our purposes, the > flex plate does deliver torque loads to the gear box. > > Charlie > > So, make a flywheel just big enough to pick up the bolt > pattern of the damper plate and bolt it on over the stock flex > plate. So the flex plate is not loaded at all except for > starting the engine. > > Or, buy a racing steel or aluminum flywheel and bolt the > damper to that. > > Lynn E. Hanover > > Virus-free. www.avast.com > > > I think that's what Dave Leonard did, but it did require some machining of various parts to make everything fit up. --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus --------------42E862571BCFC1964F23771B Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: 8bit
On 11/1/2018 2:09 PM, lehanover lehanover@aol.com wrote:


In a message dated 11/1/2018 2:57:48 PM Eastern Standard Time, flyrotary@lancaironline.net writes:



In a message dated 11/1/2018 2:30:33 PM Eastern Standard Time, flyrotary@lancaironline.net writes:

On 11/1/2018 12:58 PM, lehanover lehanover@aol.com wrote:


On the racer, I built a small steel flywheel just big enough to fit up a 5 1/4" Tilton dual disc clutch pack. The front side needed to have about 1/4" spigot so as to clear the flex plate which has a slight conical shape.  I just bolted the flywheel on over the flex plate. Never a problem on the  95 RX-7. a big problem on a sports racer I built. The driver defeated the rev limiter by shifting into 1st rather than 3rd while already turning about 9,500 RPM. The transmission was a Hewland FT-200, dog ring style, so it went right into the selected gear.  The flex plate has only 6 welds to keep the ring gear on the flex plate. The ring gear broke next to one weld. The free end tried to machine the bell housing into 2 pieces. The ring gear also rolled outboard about 30 degrees. It wanted out and almost made it.

On the replacement ring gear I TIG welded an additional 6 welds and added 12 welds to the back of the ring gear. 

Since you do not need a wear surface for the airplane installation, just a piece of aluminum plate could be used to produce a similar flywheel. The flex plate is just used to start the engine and delivers no torque loads to the gear box. 

Lynn E. Hanover

Len, if Tracy's damper plate is used, it bolts to the flex plate, just inside of the ring gear. So for our purposes, the flex plate does deliver torque loads to the gear box.

Charlie

So, make a flywheel just big enough to pick up the bolt pattern of the damper plate and bolt it on over the stock flex plate. So the flex plate is not loaded at all except for starting the engine.

Or, buy a racing steel or aluminum flywheel and bolt the damper to that.

Lynn E. Hanover
Virus-free. www.avast.com
I think that's what Dave Leonard did, but it did require some machining of various parts to make everything fit up.
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