X-Junk-Score: 0 [] X-Cloudmark-Score: 0 [] X-Cloudmark-Analysis: v=2.2 cv=HLeBLclv c=1 sm=1 tr=0 a=Y40JpD914ZZ0NpR41OqDPQ==:117 a=55z/sxGcUIPVrBMYBb4HRw==:17 a=x7bEGLp0ZPQA:10 a=_Z_nqdSeG58A:10 a=R9QF1RCXAYgA:10 a=r77TgQKjGQsHNAKrUKIA:9 a=eRLigfuSAAAA:8 a=pGLkceISAAAA:8 a=Ia-xEzejAAAA:8 a=on22okXAAAAA:8 a=7g1VtSJxAAAA:8 a=d5QNYjuPcAgareo6kOQA:9 a=QEXdDO2ut3YA:10 a=Qa1je4BO31QA:10 a=gvSQh4r-fQ0A:10 a=4PR2P7QzAAAA:8 a=NcMezGABgmvESRSP7t0A:9 a=m078dRt48J8W-J0y:21 a=_W_S_7VecoQA:10 a=BfhXYjFvZD4iae-mNffo:22 a=Urk15JJjZg1Xo0ryW_k8:22 a=NPqpj5bUEVj9vR1HIonK:22 a=grOzbf7U_OpcSX4AJOnl:22 a=4dqwQCo7Po2mVW515mGf:22 From: "Neil Unger 12348ung@gmail.com" Received: from mail-pf0-f175.google.com ([209.85.192.175] verified) by logan.com (CommuniGate Pro SMTP 6.2.5) with ESMTPS id 11336756 for flyrotary@lancaironline.net; Wed, 04 Jul 2018 18:36:43 -0400 Received-SPF: pass receiver=logan.com; client-ip=209.85.192.175; envelope-from=12348ung@gmail.com Received: by mail-pf0-f175.google.com with SMTP id z24-v6so3609917pfe.7 for ; Wed, 04 Jul 2018 15:36:44 -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=M8nRSOZfyUzZkg34ZL3cfi5ST10+ctNjlj2hsRQoyjQ=; b=X1R7Q1qhvrKD14vOrjGM2WvfTRpxo4/ifjoOD54Q6HIJvpnWb2E1tco4B01TPa+Y7s EKy+qF2UMwwhU12h5u/nErx6XicmntLY6VBUCA2n//p/2in91G4SqYXJ/RuBxh133MZi 6OZd5ceQaYgCa6yzCMedivKKOBT6KCF4/QM6RdLqxTkR4Sf/T2MazE6cu/sd/V3eVxwG 1+vgg3umaR6wk1XOtQIWjESXqJhpl0GhSW876m0Zx4dnaaGlvkYmQF57Zi86yPJ6RNzL FWUWQ8dAia+7c4F4o4t7B87kD4MC9WrOAMnRfsDZa6Pzdx0e0G2PZKEcIIF+NXtZ6Txx r1ZQ== 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=M8nRSOZfyUzZkg34ZL3cfi5ST10+ctNjlj2hsRQoyjQ=; b=ayjHgXpRQwe+tm4iZSMKl//BFzVBOsvc9Rlgv8JIkbTZDoYYD1ibt4egPOOSiVRsgd CqULqup+xEI4NreG/gLM9U3VqVuYo9rLHTY3BhTgeDxJeMQj2tPK8Ca3S1eIDhJvSU1G +DBXEo744sEHXdMUja9s/198UyOq/UGhBrmev7RvS1DsuqW9im7rnl12CeHSzv8KkeMT H1V+KV/utQa6AT6uOIrKIBgFWZEd1mqUchwBlclui0yNW8dQB4A01lUok7Ew/+HBewSE y+FXtfAWASLG2/IewI/q7ToYemaE9x2iFPIc6Ob+QBYL7u/JbaYRIiWiOy8Jk72UCBHE tQOA== X-Gm-Message-State: APt69E3cggRLifFstKaKooExZNoRRRbdMbP6DMytcZTc2F9hqHs7aciB M7VJ1DFjbSRks6u/KrVPW2sRZZjz X-Google-Smtp-Source: AAOMgpc8GzqTzN7weo1sLW8e6wW+j2jeLO/RoJdcRegzBje9SYkp9ErOgMUoVFylyvPHaBSNiLk6TA== X-Received: by 2002:a63:4f63:: with SMTP id p35-v6mr3360447pgl.167.1530743785790; Wed, 04 Jul 2018 15:36:25 -0700 (PDT) Return-Path: <12348ung@gmail.com> Received: from [192.168.0.103] ([103.198.24.78]) by smtp.gmail.com with ESMTPSA id x11-v6sm8348655pge.15.2018.07.04.15.36.23 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 04 Jul 2018 15:36:24 -0700 (PDT) Subject: Re: [FlyRotary] Re: [flyrotary ] RE: Tension Bolts To: Rotary motors in aircraft References: Message-ID: Date: Thu, 5 Jul 2018 08:36:20 +1000 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:52.0) Gecko/20100101 Thunderbird/52.8.0 MIME-Version: 1.0 In-Reply-To: Content-Type: multipart/alternative; boundary="------------03C4F391EF1FA0BADF3AA375" Content-Language: en-US This is a multi-part message in MIME format. --------------03C4F391EF1FA0BADF3AA375 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 8bit All, from my experience with bolts fracturing, it is usually over tensioning or particularly unequal tensioning .  I think Lyn's advice has really shone the light in the tunnel with his suggestions for tensioning  the bolts.  Basically do them multiple times to ensure equal tension on all bolts.   My $.02 worth after many years of having to drill out broken studs. Neil. On 7/5/2018 8:29 AM, Andrew Martin andrew@martinag.com.au wrote: > My mount is much same, just 1/4” steel plate with homemade sump welded > to plate, works well, lightweight & no broken tension bolts so far. > Would be interesting to also know at what time since overhaul that > bolts broke, to see if there is correlation. > > Andrew > > On Thu, 5 Jul 2018 at 6:03 am, Neil Unger 12348ung@gmail.com > > wrote: > > Jeff,  At last someone did what I did, except my plate is only 3/8 " > thick, but then I only use rear mounts with the plate.  Very > simple and > works well to date.  I have no idea if foaming is a problem, but have > never lost oil pressure, so am assuming there is no problem going > on in > the sump using standard Renesis oil pickup as I have. > > > On 7/4/2018 9:49 PM, Jeff Whaley jwhaley@datacast.com > wrote: > > My aluminum plate is 0.5" thick; you can see it is routed around > the rubber mounts, the center is wide open - just a 2.5"-3"" strip > of metal left around the oil pan bolts/engine mating surface. > > Jeff > > > > -----Original Message----- > > Out of curiosity (of course otherwise why would i ask) what is > the thickness of your plate between the pan and the engine? > > > > Happy 4th > > > > Rich > > > > -----Original Message----- > > From: Jeff Whaley > > Sent: July-03-18 10:41 AM > > To: 'Rotary motors in aircraft' > > Subject: RE: [flyrotary ] RE: Tension Bolts > > > > Rich, my engine is a 1988 13B, normally aspirated, aluminum > plate bed mount, so the engine is held in-place by the oil pan > bolts.  The aluminum plate and engine mount are of my own design > and construction. > > Jeff > > > > > > -----Original Message----- > > Thanks Jeff > > > > Which model of rotary > > > > What kind of engine mount > > > > Any other modifications to the engine > > > > Rich > > > > -----Original Message----- > > From: Jeff Whaley > > Sent: July-03-18 9:54 AM > > To: Rotary motors in aircraft > > Subject: RE: [flyrotary ] RE: Tension Bolts > > > > FWIW:  I had one broken tension bolt on spark plug side of the > engine; not exactly sure which one but it was around the 10 > o'clock position if looking at the bolt heads end. The bolt broke > in the threaded portion right where the threads were no longer > engaged with the housing ... this was posted way back in 2011 ... > see message #53485.  Jeff > > > > > > > > -- > > Homepage: http://www.flyrotary.com/ > > Archive and UnSub: > http://mail.lancaironline.net:81/lists/flyrotary/List.html > > > -- > Homepage: http://www.flyrotary.com/ > Archive and UnSub: > http://mail.lancaironline.net:81/lists/flyrotary/List.html > > -- > Regards Andrew Martin Martin Ag --------------03C4F391EF1FA0BADF3AA375 Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: 8bit

All, from my experience with bolts fracturing, it is usually over tensioning or particularly unequal tensioning .  I think Lyn's advice has really shone the light in the tunnel with his suggestions for tensioning  the bolts.  Basically do them multiple times to ensure equal tension on all bolts.   My $.02 worth after many years of having to drill out broken studs.

Neil.


On 7/5/2018 8:29 AM, Andrew Martin andrew@martinag.com.au wrote:
My mount is much same, just 1/4” steel plate with homemade sump welded to plate, works well, lightweight & no broken tension bolts so far.
Would be interesting to also know at what time since overhaul that bolts broke, to see if there is correlation.

Andrew

On Thu, 5 Jul 2018 at 6:03 am, Neil Unger 12348ung@gmail.com <flyrotary@lancaironline.net> wrote:
Jeff,  At last someone did what I did, except my plate is only 3/8 "
thick, but then I only use rear mounts with the plate.  Very simple and
works well to date.  I have no idea if foaming is a problem, but have
never lost oil pressure, so am assuming there is no problem going on in
the sump using standard Renesis oil pickup as I have.


On 7/4/2018 9:49 PM, Jeff Whaley jwhaley@datacast.com wrote:
> My aluminum plate is 0.5" thick; you can see it is routed around the rubber mounts, the center is wide open - just a 2.5"-3"" strip of metal left around the oil pan bolts/engine mating surface.
> Jeff
>   
> -----Original Message-----
> Out of curiosity (of course otherwise why would i ask) what is the thickness of your plate between the pan and the engine?
>
> Happy 4th
>
> Rich
>
> -----Original Message-----
> From: Jeff Whaley
> Sent: July-03-18 10:41 AM
> To: 'Rotary motors in aircraft'
> Subject: RE: [flyrotary ] RE: Tension Bolts
>
> Rich, my engine is a 1988 13B, normally aspirated, aluminum plate bed mount, so the engine is held in-place by the oil pan bolts.  The aluminum plate and engine mount are of my own design and construction.
> Jeff
>
>
> -----Original Message-----
> Thanks Jeff
>
> Which model of rotary
>
> What kind of engine mount
>
> Any other modifications to the engine
>
> Rich
>
> -----Original Message-----
> From: Jeff Whaley
> Sent: July-03-18 9:54 AM
> To: Rotary motors in aircraft
> Subject: RE: [flyrotary ] RE: Tension Bolts
>
> FWIW:  I had one broken tension bolt on spark plug side of the engine; not exactly sure which one but it was around the 10 o'clock position if looking at the bolt heads end.  The bolt broke in the threaded portion right where the threads were no longer engaged with the housing ... this was posted way back in 2011 ... see message #53485.  Jeff
>
>
>
> --
> Homepage:  http://www.flyrotary.com/
> Archive and UnSub:   http://mail.lancaironline.net:81/lists/flyrotary/List.html


--
Homepage:  http://www.flyrotary.com/
Archive and UnSub:   http://mail.lancaironline.net:81/lists/flyrotary/List.html
--
Regards Andrew Martin Martin Ag

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