X-CGP-ClamAV-Result: CLEAN X-VirusScanner: Niversoft's CGPClamav Helper v1.23.0 (ClamAV engine v0.103.0) X-Junk-Score: 0 [] X-Cloudmark-Score: 0 [] X-Cloudmark-Analysis: v=2.3 cv=XpSExmN9 c=1 sm=1 tr=0 a=yddmuxop3eaF2vhkAzXwyw==:117 a=3YhXtTcJ-WEA:10 a=x7bEGLp0ZPQA:10 a=K7ySfSCCDxUA:10 a=5lucXWJGAAAA:8 a=pGLkceISAAAA:8 a=Ia-xEzejAAAA:8 a=_6GpL_ENAAAA:8 a=o1OHuDzbAAAA:8 a=pW8B2vQ6AAAA:8 a=7g1VtSJxAAAA:8 a=DcBPYUtZwbLt1gwwA_QA:9 a=QEXdDO2ut3YA:10 a=Qa1je4BO31QA:10 a=gvSQh4r-fQ0A:10 a=7SCO1ie6V_MT6x9pzbcA:9 a=jzlq0Hkaxj2C9Kxc:21 a=sIFWCFSNc_AA:10 a=tjNemD4wtFR24VrVMQME:22 a=Urk15JJjZg1Xo0ryW_k8:22 a=5YQ6H4ZxyGn-KoBYtt8s:22 a=NM4QHZ20jVRG-2vQPwNQ:22 a=grOzbf7U_OpcSX4AJOnl:22 From: "Matt Boiteau mattboiteau@gmail.com" Received: from mail-lj1-f181.google.com ([209.85.208.181] verified) by logan.com (CommuniGate Pro SMTP 6.2.14) with ESMTPS id 1462160 for flyrotary@lancaironline.net; Wed, 28 Apr 2021 23:23:04 -0400 Received-SPF: pass receiver=logan.com; client-ip=209.85.208.181; envelope-from=mattboiteau@gmail.com Received: by mail-lj1-f181.google.com with SMTP id o5so41630821ljc.1 for ; Wed, 28 Apr 2021 20:23:06 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to; bh=PDhB70G+4rklKV4qY1Ftr+wrVjbCQnbvrNn9xtl+Qyc=; b=N5rHgMP3PlmC/fSAj+93cGYDZkRHN51SNUagTbehOUaO7freiu/cIhEeB85ljdgrHk xxEQ4AmXn0K4hAzm2lq5DBTw9J1ku7byfgM4YGtwKctHdFiGKNMA5ktKbexDEi/GK3Zf V3Feny9S6Arzb0KPHJTuU332Q8e9r75/fpTmGic7h9DnVZ206/5cN/4x+QOi/eci2UQf +MfeUirawso3qIkxKQLRkLFaF8g3K4Ig2c52S9qsRY6+e4IXs5oaXC/1hG6FQ/XEVj7N VCDgCJ+gCoCfD2n+Uqu7jQr5Q5u0sdb2ij3HpRfch5UOSlFEdugB16b5IpywY1fDBDTW GWSA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to; bh=PDhB70G+4rklKV4qY1Ftr+wrVjbCQnbvrNn9xtl+Qyc=; b=Kh6Q99/n/JGZeaE2EvaHQCHQWhY5Nc50WnZDQl7lfQCLW+JOW+l0ZmgBVlvk0/VnWK IBP8cS/Uxk1gwZ73Ik+ACrkA3gTD/aSPSJIcFONWjcC2SGa7rUHtsnl22duArDHHN/vP N2Td5HDgYR2Qsc6Bvcm0vZGobfKoNlZrhwjP/Z6uxFODagRXyxdCYroLn/05vIhLLaT8 4a7AKtMBRSEtryH1dLuGmDNPyuaWCt9xARl1mTMUmBtqZZRgI/cRvfdkgz2wnkvp6qvM 28HtFRbb94iR3FtullfjZyD9Mbo+YS7oUOCtydMuokC8rWjFplSsl3hTM91CV2vA1XHr S8nA== X-Gm-Message-State: AOAM531ZBGZeIKPGV8pXPz1AQHukm6WVfQGQkh+2DKlawbjoRuS65yfA wkd8fXVgZZFGEUDJzIpSxYzuegMLLmefxr+a6ssvBGBJnxy+3I+5 X-Google-Smtp-Source: ABdhPJyfIUNQBiBesfvxR2mfDVD27wjGUug+6WrAT/zVutz7OZAshddEXoKgTuUMA2Mha/gqcl/w9p2JzvHA5tRfZbs= X-Received: by 2002:a2e:a788:: with SMTP id c8mr22919946ljf.117.1619666567573; Wed, 28 Apr 2021 20:22:47 -0700 (PDT) MIME-Version: 1.0 References: In-Reply-To: Date: Wed, 28 Apr 2021 23:22:35 -0400 Message-ID: Subject: Re: [FlyRotary] Re: PSRU thrust bearing/washer To: Rotary motors in aircraft Content-Type: multipart/alternative; boundary="0000000000006a34f605c114024e" --0000000000006a34f605c114024e Content-Type: text/plain; charset="UTF-8" Straight PTFE has a Durometer 50D-65D. I'll go with it. https://www.mcmaster.com/9266K82/ Prop I have is a 74" ground adjustable Sensenich. Pitched to 22degrees. Static full power is 2200 while flying is 2600. With the 3.17 gearing, engine RPM is 8250. Finn, I'm not sure, the restrictor is part of the fitting. Neil, can you pipe in here? I won't say I know anything like Tracy and them do, but a planetary gear, doesn't it only need a splash of oil for lub? - Matt Boiteau On Wed, Apr 28, 2021 at 7:38 PM Charlie England ceengland7@gmail.com < flyrotary@lancaironline.net> wrote: > Does 'glass filled' mean fiberglass? Any abrasive risk if the PTFE does > start to wear? Looks like they also have straight PTFE sheet stock, but I > didn't look at durometer. > > Are you running some monster 8' diameter prop with that ratio? > > Charlie > > On 4/28/2021 5:46 PM, Matt Boiteau mattboiteau@gmail.com wrote: > > Squished / deformed is the verbage I used back in 2019 about it. I can't > seem to find any pictures on it, but I remember it being deformed up pretty > good. I've been battling issues in the past with the vulcanization rubber > of Neil's cushion drive was coming apart. I've put on Tracey's Cushion > drive in the meanwhile. > > Dry fitting everything (no oring and no snubber) with the input shaft > sitting all the way down on the prop shaft, I have 0.085" clearance. To get > the 5-10thou gap, I would need a snubber 0.075" - 0.080" thick. The closest > I can get is 1/16" thick, which is 0.0625. > > I found this stuff for the snubber, high temp. Can cut out a washer from > it. > https://www.mcmaster.com/8636K11/ > > There is a restrictor in the fitting going into the PSRU. I have a temp > gauge on the PSRU, and it stays consistent with the oil. I have parts to > add a PSI sensor to the back half of the PSRU to see if things are draining > okay. > > - Matt Boiteau > > > On Wed, Apr 28, 2021 at 5:29 PM Charlie England ceengland7@gmail.com < > flyrotary@lancaironline.net> wrote: > >> The confusing thing to me is how it got hot enough to melt nylon; over >> 400 degrees F. That seems a lot hotter than than the shaft or bearings >> should ever get. >> >> >> Virus-free. >> www.avast.com >> >> >> On Wed, Apr 28, 2021 at 3:13 PM Matt Boiteau mattboiteau@gmail.com < >> flyrotary@lancaironline.net> wrote: >> >>> The end play was good. Metal ruler across and could just see daylight >>> across. >>> >>> Neil's uses a rubber oring, so we test endplay without it. Then adding >>> the oring will add the nessessary clearance in end play. >>> >>> The one Neil supplied was either nylon or Teflon flat washer and it >>> melted, so removed it. So talking with him, switched it out to the oil >>> embedded one. Again, just a flat washer. >>> >>> Anyone have more details what Tracey used? Like a spring washer made out >>> of nylon? >>> >>> >>> >>> >>> >>> On Wed., Apr. 28, 2021, 14:16 Finn Lassen finn.lassen@verizon.net, < >>> flyrotary@lancaironline.net> wrote: >>> >>>> Too little or too much end play? >>>> >>>> Tracy specifies 0.005 to 0.035" >>>> >>>> Note that if you check it without RTV, it may increase when you >>>> assemble it. >>>> >>>> Finn >>>> >>>> On 4/28/2021 1:05 PM, Matt Boiteau mattboiteau@gmail.com wrote: >>>> >>>> I have one of Neil's 3.17 psru with Tracey's cushion drive. *I also >>>> sent Neil an email but it's late in the night in Australia. >>>> >>>> After my fly off hours, tearing down the plane to inspect everything. >>>> The Ultra-Low-Friction Oil-Embedded Thrust Bearing is broken into pieces. >>>> https://wwwmcmaster.com/7421K28/ >>>> >>>> The nylon or teflon washer supplied just melted. I thought I nailed it >>>> with a fix using the oil-embedded, but I guess not. >>>> >>>> I think in Tracey's documentation, he called it a snubber ? Any ideas >>>> what I can use, or why this happens? >>>> - Matt Boiteau >>>> >>>> >>>> -- >>>> Homepage: http://www.flyrotary.com/ >>>> Archive and UnSub: http://mail.lancaironline.net:81/lists/flyrotary/List.html >>>> >>>> >>>> >>>> ------------------------------ >>>> [image: Avast logo] >>>> >>>> This email has been checked for viruses by Avast antivirus software. >>>> www.avast.com >>>> >>>> >>>> <#m_3072101880935226263_m_8500599527585685214_m_8865818780860055044_m_-123363309103512791_m_1371103534129407806_m_-7051677788530083193_m_7353984697272831048_DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2> >>>> >>> > --0000000000006a34f605c114024e Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Straight PTFE has a Durometer 50D-65D. I'll go with it= .
https://www.mcmaster.co= m/9266K82/

Prop I have is a 74" ground=C2=A0adjustable Sens= enich. Pitched to 22degrees. Static full power is 2200 while flying is 2600= . With the 3.17 gearing, engine RPM is 8250.

Finn, I'm not sure,= the restrictor is part of the fitting. Neil, can you pipe in here? I won&#= 39;t say I know anything like Tracy and them do, but a planetary=C2=A0gear,= doesn't it only need a splash of oil for lub?

- Matt Boiteau


On Wed, Apr 28, 2021 at 7:38 PM Charlie England ceengland7@gmail.com <flyrotary@lancaironline.net> wr= ote:
=20 =20 =20
Does 'glass filled' mean fiberglass? Any abrasive risk if the PTFE does start to wear? Looks like they also have straight PTFE sheet stock, but I didn't look at durometer.

Are you running some monster 8' diameter prop with that ratio?
Charlie

On 4/28/2021 5:46 PM, Matt Boiteau mattboiteau@gmail.com wrote:
=20
Squished / deformed is the verbage I used back in 2019 about it. I can't seem to find any pictures on it, but I remember it being deformed up pretty good. I've been battling=C2=A0issues in the past with the vulcanization rubber of Neil's cushion drive was coming apart. I've put on Tracey&#= 39;s Cushion drive in the meanwhile.

Dry fitting everything (no oring and no snubber) with the input shaft sitting all the way down on the prop shaft, I have 0.085"= ; clearance. To get the 5-10thou gap, I would need a snubber 0.075" - 0.080" thick. The closest I can get is 1/16"= ; thick, which is=C2=A00.0625.

I found this stuff for the snubber, high temp. Can cut out a washer from it.=C2=A0
h= ttps://www.mcmaster.com/8636K11/

There is a restrictor in the fitting going into the PSRU. I have a temp gauge on the PSRU, and it stays consistent with the oil. I have parts to add a PSI sensor to the back half of the PSRU to see if things are draining okay.

- Matt Boiteau


On Wed, Apr 28, 2021 at 5:29 PM Charlie England ceengland7@gmail.com <flyrotary@lancaironline.net> wrote:
The confusing thing to me is how it got hot enough to melt nylon; over 400 degrees F. That seems a lot hotter than than the shaft or bearings should ever get.=C2=A0

3D"" www.avast.com

On Wed, Apr 28, 2021 at 3:13 PM Matt Boiteau mattboiteau@gmail.com <flyrotary@lancaironline.net> wrote:
The end play was good. Metal ruler across and could just see daylight across.

Neil's uses a rubber oring, so we tes= t endplay without it. Then adding the oring will add the nessessary clearance in end play.

The one Neil supplied was either nylon or Teflon flat washer and it melted, so removed it. So talking with him, switched it out to the oil embedded one. Again, just a flat washer.

Anyone have more details what Tracey used? Like a spring washer made out of nylon?





On Wed., Apr. 28, 2021, 14:16 Finn Lassen finn.lassen@v= erizon.net, <flyrotary@lancaironline.net> wrote:
I have one of Neil's 3.17 ps= ru with Tracey's cushion drive. *I also sent Neil an email but it's late in the night in Australia.

After my fly off hours, tearing down the plane to inspect everything. The Ultra-Low-Friction Oil-Embedded Thrust Bearing is broken into pieces.=C2=A0
https://wwwmcmaster.com/7421K28/

The=C2=A0nylon or teflon washer supplied just melted. I thought I nailed it with a fix using the oil-embedded, but I guess not.

I think in Tracey's documentation, he called it a snubber ? Any ideas what I can use, or why this happens?
- Matt Boiteau


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


3D"Avast

This email has been checked for viruses by Avast antivirus software.
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