X-CGP-ClamAV-Result: CLEAN X-VirusScanner: Niversoft's CGPClamav Helper v1.23.0 (ClamAV engine v0.103.0) From: "Matt Boiteau mattboiteau@gmail.com" Received: from mail-lf1-f52.google.com ([209.85.167.52] verified) by logan.com (CommuniGate Pro SMTP 6.2.14) with ESMTPS id 1461543 for flyrotary@lancaironline.net; Wed, 28 Apr 2021 18:46:42 -0400 Received-SPF: pass receiver=logan.com; client-ip=209.85.167.52; envelope-from=mattboiteau@gmail.com Received: by mail-lf1-f52.google.com with SMTP id 2so9060909lft.4 for ; Wed, 28 Apr 2021 15:46:43 -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=1B9HXIGoWJts0jG0qjKSm0S9cOD3efH/2UdChqq2Zcw=; b=bV6v95/1LgFk0tpM39JpVQZFuz0LTeXGeVcKKcEVr9/Yo86nT8ZyY7iZKs4RM7i2UA LB4qcICzobQZr9qjBH+ravy+Hrfol5QgiMa2pX/8yueWbggDse/oFJoUQr0HkMuD/i9o LV9s3t7kX9qrCGthYCyjs5jqMoKEZVeczqyyhpYSrPJt32aDSIL8ZB+iFu9T0+RRJesH uWf/s3wDZqljUmcXelyJzb81KvtnbpMRlypMZeiXqXlLjYq4ppmdvN6k4NnYAdbt21YW 9xWhPB2aj0MtuSTDSasyDnt7B4JOJQm7wyb3QLwXzLF0+YiR/o1ZmBjFBrbWDeZZpUK4 i8tg== 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=1B9HXIGoWJts0jG0qjKSm0S9cOD3efH/2UdChqq2Zcw=; b=RpdEI8yWhVSX1CSknDVH2sR4JVp75c9rPFrY3lpwPiqfW2mJ8XdHpJCwcScUFK0EjT HuTsyqac9Pt93GGbYDKbGJCubbaLDiI1YYw0dB2mm2j5LbTlaDfn5WZQ4DIhlkHE+PHY wP0wX7sAwiterB5rcx2iG5ZX0kUeWQdiBjZBIkhF1w3iEtTQYYn06/8U5HwQafEZF32U kUxcMLbDxRizvjT+9kzUgr06A9PCsGD6vZCc2MY0pYyqEZdOy3BFeT3VYEnTFACjWLbQ pHl+ww4EQuNArxA9L4k02E7u+QRt6NNP0WOIvHqjwgrn7XqX94hs+1GtpFfSzKPtXF2p Jz3g== X-Gm-Message-State: AOAM531EMOVz5gxK34FMQO7CVO6Kx1U8PyaTGuZtLbXiq/FNqD81UJy4 lwMesdp9f5Eni3tiGTcAg/nIr36+5nMgxxgRQ8qC1LtkHlOc0A8c X-Google-Smtp-Source: ABdhPJzlFMudzcp8TvlybMq4vajn1xWCvRIDe2J3GM7ZF2Z9o6SyFzJHFYJkvjR69zdDcnz0Y49brT07Lq1CTme/mrw= X-Received: by 2002:a19:4849:: with SMTP id v70mr2094343lfa.590.1619649984329; Wed, 28 Apr 2021 15:46:24 -0700 (PDT) MIME-Version: 1.0 References: In-Reply-To: Date: Wed, 28 Apr 2021 18:46:13 -0400 Message-ID: Subject: Re: [FlyRotary] Re: PSRU thrust bearing/washer To: Rotary motors in aircraft Content-Type: multipart/alternative; boundary="000000000000f9fdfd05c1102557" --000000000000f9fdfd05c1102557 Content-Type: text/plain; charset="UTF-8" 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 > > <#m_8500599527585685214_m_8865818780860055044_DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2> > > 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_8500599527585685214_m_8865818780860055044_m_-123363309103512791_m_1371103534129407806_m_-7051677788530083193_m_7353984697272831048_DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2> >>> >> --000000000000f9fdfd05c1102557 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Squished / deformed is the verbage I used back in 2019 abo= ut 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 wi= th the vulcanization rubber of Neil's cushion drive was coming apart. I= 've put on Tracey's Cushion drive in the meanwhile.

Dry fitt= ing everything (no oring and no snubber) with the input shaft sitting all t= he way down on the prop shaft, I have 0.085" clearance. To get the 5-1= 0thou gap, I would need a snubber 0.075" - 0.080" thick. The clos= est 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 fr= om it.=C2=A0
https://www.mcmaster.com/8636K11/

There i= s a restrictor in the fitting going into the PSRU. I have a temp gauge on t= he PSRU, and it stays consistent with the oil. I have parts to add a PSI se= nsor 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<= /a> <fl= yrotary@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 shaf= t or bearings should ever get.=C2=A0

3D"" Virus-free. www.avast.com

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

Neil&#= 39;s uses a rubber oring, so we test endplay without it. Then adding the or= ing will add the nessessary clearance in end play.
<= br>
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?

<= div dir=3D"auto">


On Wed., Apr. 28, 2021, 14:16 Finn Lassen finn.las= sen@verizon.net, <flyrotary@lancaironline.net> wrote:
=20 =20 =20
=20
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.=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


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