X-Virus-Scanned: clean according to Sophos on Logan.com From: "Charlie England" Received: from mail-it0-f42.google.com ([209.85.214.42] verified) by logan.com (CommuniGate Pro SMTP 6.2c3) with ESMTPS id 9845568 for flyrotary@lancaironline.net; Thu, 22 Jun 2017 22:44:16 -0400 Received-SPF: pass receiver=logan.com; client-ip=209.85.214.42; envelope-from=ceengland7@gmail.com Received: by mail-it0-f42.google.com with SMTP id m47so1560170iti.1 for ; Thu, 22 Jun 2017 19:44:17 -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=q8Ax2/YyC09wc8GRvsnU84WQsGCK/de+JdwS+tKtg9w=; b=MXzXhk5wAQPEtd5LcreOwx646f5LARwYuhor14rvWVELevr45OTCn5K6zXmopdFYZY 1zebMCzyhKpqp9YB8qOw7vs8igDaLftsKxIQw0jurvhBZSxSDNveQnph3l6glXzuk+Zx ftNuL7GFIqX3hiy0yUR52Zdhnclc7zyI2bGKBOdG7flIc2Y6eSkBGwDqoqfozXRc2YDs WfgtlpyyYp91EEH3xBwYN40rSEfF5NiHBqGLdVGBBpJRcTsbRbNtVXXVJQIHh6ubnB3H mPKB39t/DF3N4+h3VAtXOVcnmvVzXYH/ZfgK2bfheT1cZIYUxN6j/GKK0Mh3wlO6FxRk FBcA== 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=q8Ax2/YyC09wc8GRvsnU84WQsGCK/de+JdwS+tKtg9w=; b=XFIxXlL5hXuAgOd/9gRuwF3WA1+ja0PpPv4ttq2Hj+BCPtSrw1KbUcXOfcADTWPxM3 ciiDthqAHp2QVR3E/giRX2lRgqA71aqOZkwIME2DtcXbR5FrQxc/qHXQ8SCnMOfqwdmz mxEj+BDKw2BfyP2Cb+mYRSAssl3QOb+6FL4xFjcSLbqzuudg3ujHRgZEHYW2H9qZDMVQ kBDjgn93RMFPh1R8rc/TTbqEiNeNVURE5fWhfa4AIqCl8wKtSux9efBSVYWAH2lsmVnR vG74adspdEAM1zvI4iIYVDtNdRtO4c8BjgjeYv3MYdeyGU/S2uANkf68fwRUXHgTmEmB M5JA== X-Gm-Message-State: AKS2vOw1T5dy1ZMdTlgIvX5shaRhVzleqeWXGkCwpJJyarLRZxuWxzrb q/AeIbCVaD7XJJSH X-Received: by 10.36.2.133 with SMTP id 127mr5140913itu.21.1498185840156; Thu, 22 Jun 2017 19:44:00 -0700 (PDT) Return-Path: Received: from [192.168.10.228] (adsl-98-95-172-105.jan.bellsouth.net. [98.95.172.105]) by smtp.googlemail.com with ESMTPSA id v13sm1975236ita.28.2017.06.22.19.43.58 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 22 Jun 2017 19:43:59 -0700 (PDT) Subject: Re: [FlyRotary] Re: Flywheel or Spline modification To: Rotary motors in aircraft References: Message-ID: Date: Thu, 22 Jun 2017 21:46:54 -0500 User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:52.0) Gecko/20100101 Thunderbird/52.2.0 MIME-Version: 1.0 In-Reply-To: Content-Type: multipart/alternative; boundary="------------A9B843581A674BB69F5417EA" Content-Language: en-US X-Antivirus: Avast (VPS 170622-4, 06/22/2017), Outbound message X-Antivirus-Status: Clean This is a multi-part message in MIME format. --------------A9B843581A674BB69F5417EA Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Uh, not that I know anything, but if I did, I'd say I see your problem. :-) Isn't the stress on a soft coupling that close to the 'axle' going to be massive? I thought that the whole reason for putting the soft components out at some significant radius from center was to reduce the load on them. Charlie On 6/22/2017 8:50 PM, Neil Unger wrote: > > All , As usual I forgot to attach a photo, This is the first one with > the green Polyurethane flex that was a failure. New one has a further > lightened Alloy base with a rubber flex. Neil. > > > On 6/23/2017 11:40 AM, Neil Unger wrote: >> >> Kelly and all, The flexdrive I now have under test for the new >> redrive bolts directly onto the E shaft and is not connected in any >> way to the flex plate, other than to hold it onto the E shaft. I >> originally used polyurethane as the "Flex" but it disintegrated >> within hours. >> >> Next was to go back to a flex rubber vulcanized coupling that looks >> great but yet untested. The rubber is the same as engine mount >> rubber and if that fails there are many grades of rubber available. >> Results shortly once I get my new Fuel Tech ECU to actually run the >> engine!! Neil Unger. >> >> >> >> On 6/23/2017 11:15 AM, Kelly Troyer wrote: >>> Mark, >>> >>> The RD2C direct "Rigid" connection from flywheel to the Redrive >>> is somewhat a mystery to me and I suspect to most on the "Flyrotary" >>> list.........I have never seen any photos of this setup and only >>> vague descriptions.........I do not know if any on >>> the list purchased A RD2C and am aware of only the one installed on >>> Tracy's RV8......... >>> If any on the list has more knowledge or actually has seen one >>> please speak up and provide photos if possible.........I personally >>> have gone with the a (13 lb) steel flywheel and the"Soft" damper >>> provided with the RD1C by Tracy......This is the "Fix" for a failed >>> Gen 2 flex-plate used by Dave Leonard on his Turbo/13B RV6 while >>> racing at Reno.......... >>> >>> Kelly Troyer >>> >>> >>> On Thu, Jun 22, 2017 at 7:13 PM, Mark McClure >>> > >>> wrote: >>> >>> So with my inability to find a gen2 RX-7 flexplate I have >>> ordered a lightweight steel Flywheel from RacingBeat. >>> >>> My thoughts are to have the 4 bolt holes machined in the >>> flexplate or 6 holes in the spline and drill out the rivets to >>> remove the damper plate. >>> >>> From reading the archives it seems the spline directly mounted >>> is what Tracy did for the RD-2C but that it's a different spline >>> setup. >>> >>> Anyone done this? Am I better to continue searching for the auto >>> flexplate? >>> >>> Mark >>> >>> >>> >>> >>> >> > > > > -- > Homepage: http://www.flyrotary.com/ > Archive and UnSub: http://mail.lancaironline.net:81/lists/flyrotary/List.html --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus --------------A9B843581A674BB69F5417EA Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: 8bit
Uh, not that I know anything, but if I did, I'd say I see your problem. :-) Isn't the stress on a soft coupling that close to the 'axle' going to be massive? I thought that the whole reason for putting the soft components out at some significant radius from center was to reduce the load on them.

Charlie

On 6/22/2017 8:50 PM, Neil Unger wrote:

All , As usual I forgot to attach a photo,  This is the first one with the green Polyurethane flex that was a failure.  New one has a further lightened Alloy base with a rubber flex.  Neil.


On 6/23/2017 11:40 AM, Neil Unger wrote:

Kelly and all,  The flexdrive I now have under test for the new redrive bolts directly onto the E shaft and is not connected in any way to the flex plate, other than to hold it onto the E shaft.  I originally used polyurethane as the "Flex" but it disintegrated within hours.

Next was to go back to a flex rubber vulcanized coupling that looks great but yet untested.  The rubber is the same as engine mount rubber and if that fails there are many grades of rubber available.   Results shortly once I get my new Fuel Tech ECU to actually run the engine!!  Neil Unger.



On 6/23/2017 11:15 AM, Kelly Troyer wrote:
Mark,

   The RD2C  direct  "Rigid" connection from flywheel to the Redrive is somewhat a mystery to me and I suspect to most on the "Flyrotary" list.........I have never seen any photos of this setup and only vague descriptions.........I  do not know if any on 
the list purchased A RD2C and am aware of only the one installed on Tracy's RV8.........
  
   If any on the list has more knowledge or actually has seen one please speak up and provide photos if possible.........I personally have gone with the a (13 lb) steel flywheel and the"Soft" damper provided with the RD1C by Tracy......This is the "Fix" for a failed Gen 2 flex-plate used by Dave Leonard on his Turbo/13B RV6 while racing at Reno..........

Kelly Troyer


On Thu, Jun 22, 2017 at 7:13 PM, Mark McClure <flyrotary@lancaironline.net> wrote:
So with my inability to find a gen2 RX-7 flexplate I have ordered a lightweight steel Flywheel from RacingBeat.

My thoughts are to have the 4 bolt holes machined in the flexplate or 6 holes in the spline and drill out the rivets to remove the damper plate.

From reading the archives it seems the spline directly mounted is what Tracy did for the RD-2C but that it's a different spline setup.

Anyone done this? Am I better to continue searching for the auto flexplate?

Mark









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