X-CGP-ClamAV-Result: CLEAN X-VirusScanner: Niversoft's CGPClamav Helper v1.23.0 (ClamAV engine v0.103.0) X-Junk-Score: 0 [] X-KAS-Score: 0 [] From: " 12348ung@gmail.com" Received: from mail-pf1-f179.google.com ([209.85.210.179] verified) by logan.com (CommuniGate Pro SMTP 6.2.14) with ESMTPS id 1468963 for flyrotary@lancaironline.net; Sat, 01 May 2021 04:35:03 -0400 Received-SPF: pass receiver=logan.com; client-ip=209.85.210.179; envelope-from=12348ung@gmail.com Received: by mail-pf1-f179.google.com with SMTP id 10so754898pfl.1 for ; Sat, 01 May 2021 01:35:05 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:references:in-reply-to:subject:date:message-id:mime-version :thread-index:content-language; bh=9gWd4VpVXzJsOz9v1GXRFEpSlsLK8x1wYgDL2hY7XnQ=; b=GkiVV0V+aAVwGVTgr+dOc2jUo4Y1oawZSfd6jY3oBDD77evPnBKbKiwiuiCApxPqjV EnjRhsxOPK1lp2o84N+IrEZ0kVMN3toS3PMl3CvHiqd1SJI3p4O1lWuiXFsJUKfRLglC BjSajY3yhybe0VC4SsCAyVrzUdYgcs4p5/IZnCT1dp5F+KxGFj/EfrivrfcYF/KNHjy9 tcZHFEanpPwQ8tzUr30Iga0wiFLqZ8fnK/iMce9NVYwftx8IR/AncHQN1tzhFIquohpb T0zViD8Xuz91kz7e3BNul+HF+vCFBJx9oFaIeemEXoECarYxbOmFxRpeQyZ7cSg20os6 fYzQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:references:in-reply-to:subject:date :message-id:mime-version:thread-index:content-language; bh=9gWd4VpVXzJsOz9v1GXRFEpSlsLK8x1wYgDL2hY7XnQ=; b=RnxJotNjLi9of8jNonOresRyIKrEf5d4XICxt7q+axdiMQZ607zyUmK4ljgj1HaGAv EfKvcOHhEClzCWzjoshcr5zWT4cjfUTvqJeXPDBg8Z8+AZjb8GNfZrtF1zGiW+mEjxZa XHAp3dKWzt1TJg/AhVUrUWIv126DKPbuMFkreOv2oKNhzVROwbHLJhlBTeg9diL6JYvK Sqe4iDqF21R88h84l6J4Kp9s38EgiZxnIpPUTgI6r+JbTQnaNwBaxZRs1NZqKgfBZX4i 4ZejbfMC26BZdIccKsiDzUoo4Bwo9D0Jys1fCJ4AOKAzQLPWOcFdhRQj+hfaha6MEznM kWZw== X-Gm-Message-State: AOAM5321b4Ag4RJGBGLZyDXDtCDJD2aKq+G1nP6jdZQb1PwkFHC8YD3h jkPt8GvArco4n6OCwE4ifXXlSxani+w= X-Google-Smtp-Source: ABdhPJw+coG13MSOMJuyeS3hCKVGa+VCfczi3CeSrNR5LoQfI/MCBtLwvBwWu1+sAMDpKJxyK5F3Lw== X-Received: by 2002:a65:52c3:: with SMTP id z3mr8551027pgp.338.1619858087001; Sat, 01 May 2021 01:34:47 -0700 (PDT) Return-Path: <12348ung@gmail.com> Received: from UserPC ([103.198.24.78]) by smtp.gmail.com with ESMTPSA id b25sm4094274pfd.7.2021.05.01.01.34.45 for (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Sat, 01 May 2021 01:34:46 -0700 (PDT) To: "'Rotary motors in aircraft'" References: In-Reply-To: Subject: RE: [FlyRotary] Re: PSRU thrust bearing/washer Date: Sat, 1 May 2021 18:34:43 +1000 Message-ID: <000601d73e64$d7540b20$85fc2160$@gmail.com> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0007_01D73EB8.A9001B20" X-Mailer: Microsoft Outlook 16.0 Thread-Index: AQH+vxptMQEkhuO+r6G1V3r1dLqhKKp/SzRQ Content-Language: en-us This is a multipart message in MIME format. ------=_NextPart_000_0007_01D73EB8.A9001B20 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable David, I think I already have the drain required, but yet to = confirm. Thanks all the same. Neil. =20 From: Rotary motors in aircraft =20 Sent: Saturday, May 1, 2021 1:12 PM To: Rotary motors in aircraft Subject: [FlyRotary] Re: PSRU thrust bearing/washer =20 Neil, =20 If a vent is installed without providing a drain larger than an6, oil = will be pumped out of the vent even if the vent is installed in the top = of the gearbox. =20 David, =20 You are correct. The references I found recommend not running gears = mostly or completely submerged in oil. They said the oil churning by = the gears absorbs power and produces heat. However, after the = installation of the larger drain and the vent, I didn=E2=80=99t observe = a measurable change in the temperature of the oil exiting the gearbox = compared to the original setup. The reduction of the internal gearbox = pressure still may be worthwhile. =20 Steve Boese =20 =20 Sent from my iPad On Apr 30, 2021, at 3:46 PM, flyrotary@lancaironline.net = wrote: =EF=BB=BF=20 Steve, Looks like I will have to add the vent line as already = have the an6 drain. Thanks Neil. =20 From: Rotary motors in aircraft >=20 Sent: Friday, April 30, 2021 4:00 PM To: Rotary motors in aircraft > Subject: [FlyRotary] Re: PSRU thrust bearing/washer =20 Neil, =20 With a -6 drain line to the crankcase, air that was initially inside the = gearbox is mixed with the oil and this mixture is forced out the drain = by an equal volume of pure oil coming in. Eventually all the air is = eliminated and the gearbox is completely filled with oil. An RD (Tracy = Crook) redrive fitted with a -10 (5/8=E2=80=9D) id drain and a vent from = the upper part of the redrive to the upper part of the crankcase will = not fill up with oil and only have crankcase pressure inside. =20 Steve Boese=20 On Apr 29, 2021, at 4:25 PM, flyrotary@lancaironline.net = wrote: =EF=BB=BF=20 =E2=97=86 This message was sent from a non-UWYO address. Please exercise = caution when clicking links or opening attachments from external = sources. =20 Mat, Oil into the redrive is needed mainly for lubrication = and also heat transfer. Very little is needed as lubrication needs = little with oils these days. It appears that In most cases the redrive = actually fills and does not drain readily. Why I do not know. This = puts pressure on the seals back and front, which suggests it may be = beneficial to hold both seals in with small screws to prevent them = getting pushed out. Screws are good insurance as in flight a detached = seal could ruin a good day. Neil. =20 ------=_NextPart_000_0007_01D73EB8.A9001B20 Content-Type: text/html; charset="utf-8" Content-Transfer-Encoding: quoted-printable

David,

=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 I think I already have the drain = required, but yet to confirm.=C2=A0 Thanks all the same.=C2=A0=C2=A0 = Neil.

 

From: Rotary motors in aircraft = <flyrotary@lancaironline.net>
Sent: Saturday, May 1, = 2021 1:12 PM
To: Rotary motors in aircraft = <flyrotary@lancaironline.net>
Subject: [FlyRotary] Re: = PSRU thrust bearing/washer

 

Neil,

 

If a vent is installed without providing a drain = larger than an6, oil will be pumped out of the vent even if the vent is = installed in the top of the gearbox.

 

David,

 

You are correct.  The references I found = recommend not running gears mostly or completely submerged in oil. =  They said the oil churning by the gears absorbs power and produces = heat.  However, after the installation of the larger drain and the = vent, I didn=E2=80=99t observe a measurable change in the temperature of = the oil exiting the gearbox compared to the original setup.  The = reduction of the internal gearbox pressure still may be = worthwhile.

 

Steve Boese

 

 

Sent from my iPad



On Apr 30, 2021, at 3:46 PM, flyrotary@lancaironline.net wrote:

=EF=BB=BF

Steve,

          =      Looks like I will have to add the vent line as = already have the  an6 drain.

Thanks = Neil.

 

 

Neil,

<= /div>
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