X-CGP-ClamAV-Result: CLEAN X-VirusScanner: Niversoft's CGPClamav Helper v1.23.0 (ClamAV engine v0.103.0) From: "Bobby Hughes BHughes@qnsinc.net" Received: from us-smtp-delivery-128.mimecast.com ([63.128.21.128] verified) by logan.com (CommuniGate Pro SMTP 6.2.14) with ESMTPS id 893986 for flyrotary@lancaironline.net; Mon, 02 Nov 2020 08:51:41 -0500 Received-SPF: pass receiver=logan.com; client-ip=63.128.21.128; envelope-from=bhughes@qnsinc.net Received: from QNSI-EX2016.qnsinc.local (207-91-159-28.nstci.net [207.91.159.28]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-352-Hgk7ZmpANUOB5G1knS9nWg-1; Mon, 02 Nov 2020 08:51:18 -0500 X-MC-Unique: Hgk7ZmpANUOB5G1knS9nWg-1 Received: from QNSI-EX2016.qnsinc.local (10.0.0.34) by QNSI-EX2016.qnsinc.local (10.0.0.34) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2044.4; Mon, 2 Nov 2020 07:51:18 -0600 Received: from QNSI-EX2016.qnsinc.local ([fe80::e455:3daa:dac4:de26]) by QNSI-EX2016.qnsinc.local ([fe80::e455:3daa:dac4:de26%3]) with mapi id 15.01.2044.007; Mon, 2 Nov 2020 07:51:18 -0600 To: Rotary motors in aircraft Subject: RE: [FlyRotary] Re: Sump Breather? Thread-Topic: [FlyRotary] Re: Sump Breather? Thread-Index: AQHWsFtUZ0s9fmqn7UekOAqY+KsvYam03HLw Disposition-Notification-To: Bobby Hughes Return-Receipt-To: Date: Mon, 2 Nov 2020 13:51:18 +0000 Message-ID: <933a4ddc22fb4ed4bcfa24a1d0db1e99@qnsinc.net> References: In-Reply-To: Accept-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [192.168.200.109] MIME-Version: 1.0 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA28A264 smtp.mailfrom=bhughes@qnsinc.net X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: qnsinc.net Content-Language: en-US Content-Type: multipart/alternative; boundary="_000_933a4ddc22fb4ed4bcfa24a1d0db1e99qnsincnet_" --_000_933a4ddc22fb4ed4bcfa24a1d0db1e99qnsincnet_ Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable My super charged renesis had a 1" vent. It was too small. Just enough vapor= to make a mess. The tube was connected at the oil filler neck so the locat= ion may not have been the best choice. I'm planning a 1" vent for the norma= lly aspirated S21 build. Bobby From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] Sent: Sunday, November 01, 2020 8:28 AM To: Rotary motors in aircraft Subject: [FlyRotary] Re: Sump Breather? Thanks Lynn and Jeff. Appreciated. My vent is probably only 3/16 inch and It just had me thinking= ! Cheers Steve > On 1 Nov 2020, at 9:01 pm, lehanover lehanover@aol.com wrote: > > Crank case pressure is a function of the volume of combustion gasses esca= ping past the side seals and through the end gaps at the side seal ends and= corner seal fitments. > > There will always be some flow even on a new engine. So the trick is to k= eep the outbound flow speed low so as to keep escaping oil droplets falling= back into the engine rather than being expelled. In racing we are required= to have a catch bottle with a minimum volume of 1 quart. A well done rotar= y has a remarkable low flow rate and can get along fine with a small diamet= er vent tube. Not a big problem on the street. > In the aircraft the flow will be higher as the engine is usually run at o= r near full throttle for long periods. > So run it hard and look into a catch bottle to see how much oil is being = lost. A few drops to nothing is ideal. > Most can be vented into the intake flow but that will not show up any pro= blems. Every landing needs a oil level check. If the breathing is restricte= d, pressure may push out a seal or turn a seal lip over backwards. Followed= by much oil loss. I shorten the seal springs and build seal retainers on e= ach engine. You can also buy double > lip seals with one lip facing in and out. Keeps dust out of the seal lips= . > > This is seldom a problem and did not occur on showroom stock Mazda rotari= es that were turned up to high RPM. So probably not a factor. > Lynn E. Hanover > > In a message dated 11/1/2020 4:57:53 AM Atlantic Standard Time, flyrotary= @lancaironline.net writes: > > Hi Lynn EH and all > > What size breather from the sump is required? > Is this the same for all the various models (particularly the Renesis)? > We have the OEM sump but removed the plastic manifold and put a filler ca= p with small breather on the top of the steel vertical tube that runs down = into the pan. > What would happen if this breather was too small? > > Thanks > > Steve Izett > Perth Western Australia. > > > > > > -- > 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.ht= ml Disclaimer The information contained in this communication from the sender is confiden= tial. It is intended solely for use by the recipient and others authorized = to receive it. If you are not the recipient, you are hereby notified that a= ny disclosure, copying, distribution or taking action in relation of the co= ntents of this information is strictly prohibited and may be unlawful. This email has been scanned for viruses and malware, and may have been auto= matically archived by Mimecast Ltd, an innovator in Software as a Service (= SaaS) for business. Providing a safer and more useful place for your human = generated data. Specializing in; Security, archiving and compliance. To fin= d out more visit the Mimecast website. --_000_933a4ddc22fb4ed4bcfa24a1d0db1e99qnsincnet_ Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable <= /head>

My super charged renesis = had a 1” vent. It was too small. Just enough vapor to make a mess. Th= e tube was connected at the oil filler neck so the location may not have been the best choice. I’m planning a 1” vent for the = normally aspirated S21 build.

 <= /p>

Bobby

 <= /p>

From: Rotary m= otors in aircraft [mailto:flyrotary@lancaironline.net]
Sent: Sunday, November 01, 2020 8:28 AM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: Sump Breather?

 

Thanks Lynn and Jeff.

Appreciated. My vent is probably only 3/16 inch and It just had me thinking= !

Cheers

Steve

> On 1 Nov 2020, at 9:01 pm, lehanover lehanover@aol.com <flyrotary@l= ancaironline.net> wrote:
>
> Crank case pressure is a function of the volume of combustion gasses e= scaping past the side seals and through the end gaps at the side seal ends = and corner seal fitments.
>
> There will always be some flow even on a new engine. So the trick is t= o keep the outbound flow speed low so as to keep escaping oil droplets fall= ing back into the engine rather than being expelled. In racing we are requi= red to have a catch bottle with a minimum volume of 1 quart. A well done rotary has a remarkable low flow rate and c= an get along fine with a small diameter vent tube. Not a big problem on the= street.
> In the aircraft the flow will be higher as the engine is usually run a= t or near full throttle for long periods.
> So run it hard and look into a catch bottle to see how much oil is bei= ng lost. A few drops to nothing is ideal.
> Most can be vented into the intake flow but that will not show up any = problems. Every landing needs a oil level check. If the breathing is restri= cted, pressure may push out a seal or turn a seal lip over backwards. Follo= wed by much oil loss. I shorten the seal springs and build seal retainers on each engine. You can also buy dou= ble
> lip seals with one lip facing in and out. Keeps dust out of the seal l= ips.
>
> This is seldom a problem and did not occur on showroom stock Mazda rot= aries that were turned up to high RPM. So probably not a factor.
> Lynn E. Hanover
>
> In a message dated 11/1/2020 4:57:53 AM Atlantic Standard Time, flyrot= ary@lancaironline.net writes:
>
> Hi Lynn EH and all
>
> What size breather from the sump is required?
> Is this the same for all the various models (particularly the Renesis)= ?
> We have the OEM sump but removed the plastic manifold and put a filler= cap with small breather on the top of the steel vertical tube that runs do= wn into the pan.
> What would happen if this breather was too small?
>
> Thanks
>
> Steve Izett
> Perth Western Australia.
>
>
>
>
>
> --
> 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



<= b>Disclaimer

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