X-CGP-ClamAV-Result: CLEAN X-VirusScanner: Niversoft's CGPClamav Helper v1.23.0 (ClamAV engine v0.103.0) From: "Charlie England ceengland7@gmail.com" Received: from mail-il1-f172.google.com ([209.85.166.172] verified) by logan.com (CommuniGate Pro SMTP 6.2.14) with ESMTPS id 1280466 for flyrotary@lancaironline.net; Fri, 05 Mar 2021 14:34:55 -0500 Received-SPF: pass receiver=logan.com; client-ip=209.85.166.172; envelope-from=ceengland7@gmail.com Received: by mail-il1-f172.google.com with SMTP id p10so3038926ils.9 for ; Fri, 05 Mar 2021 11:34:56 -0800 (PST) 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=NJxkmDwgHX95p+x8FKgbOctgVHRmVaPNGrHx0eopjME=; b=Tnmggs3Kx1iksoENKyXZAK1xwT3T9qjDC86nZn5tLYnnxJq2T8Mjww7+uGs3c6Fr+G GpHXKVXtFkMhYq78Teg3G5HpjCp0kRz5tharLlNt8j+Rmg3HcFKVaioNd2L81ep7LbC+ UEbN4is6XaK6WR3Ky18Nhs4vV1Yw1kr/h3czFe6XzMAV/NwxHMn+d0le+IEY7TSWwrRi iUsREzWEvjY1djMA6DmWfrrZqQLiLV0DJ/nkpR2uMghz0xQM8XuY8Uc94COgdJL+6vhk 3pNUhHovSe3ZfcBlkoG6nirR02lhp9GGy5UUOj2jPVmUFIhXE+n7uhqHQ7ueRewnnOkr PWxw== 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=NJxkmDwgHX95p+x8FKgbOctgVHRmVaPNGrHx0eopjME=; b=NMB2m7s51D09vSMg5X139TF3d+OFWWwd00hxcZzQm7Ag1vzYVmVv1yTbojjjD7xhI+ /yjGSGOg/Z7Tc1kBMeRts8DRYQtbEt4kvqaCj85ye9k4/yhvGmCos/R95EO3ga8TBWH1 uGKiWw+UwvTe7UwnL3+KAw3Dg5E7LZQXsATl7kIGfJDYtIHNVZPDzKi8/na4mN5HBZJ9 /rgJUc5VzYVKEduVXSfVWfheNYoqbS+kzjcExVKaWKk58OC7YFpS0uF+TmIrPAlagZVH 7lQFsZwrpAsCgZ6dQiyoXFe1+WMGnmJegEOKS8y4ywKcUOF+d+igJmp8BCkGyMgdxjkF 07uw== X-Gm-Message-State: AOAM530ADOMaQQYYouhu2jJLwX4Jt3szhQvYsHAOFkWHoM3yCyGWUPQ1 7ViAm+SKHw5KEbHWZonlA3vNOEkT2LiG1Wk6bl28XH7R X-Google-Smtp-Source: ABdhPJzNGTXKiiryaNfwG4nKavkOMu3FRjD5dIgV7on0MOZClHlzeQy7IoEvrd21CqKHlXqd1UBSt8ayWaiJRq7HLxg= X-Received: by 2002:a92:c709:: with SMTP id a9mr10315148ilp.272.1614972878345; Fri, 05 Mar 2021 11:34:38 -0800 (PST) MIME-Version: 1.0 References: In-Reply-To: Date: Fri, 5 Mar 2021 13:33:35 -0600 Message-ID: Subject: Re: [FlyRotary] Re: [FlyRotary]: RD-1C input shaft oil seal ... Drain Hole question for Steve B. To: Rotary motors in aircraft Content-Type: multipart/alternative; boundary="000000000000bc5b1b05bccf2ca1" --000000000000bc5b1b05bccf2ca1 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable You just need to add a scavenge pump on the drain. ;-) On Fri, Mar 5, 2021 at 1:28 PM Finn Lassen finn.lassen@verizon.net < flyrotary@lancaironline.net> wrote: > So you're saying that the bigger drain hole and addition of vent will > not prevent the drive to fill up with oil? :( > > Finn > > On 3/5/2021 12:22 PM, Sboese sboese@uwyo.edu wrote: > > Jeff, > > > > The supply lines to my redrives are AN4. The oil flow rate is > restricted internally by the construction of the redrive. Without a vent= , > the air initially inside the unit is entrained in the oil primarily by th= e > action of the gears, the air is eliminated through the drain, and the uni= t > is quickly completely filled with oil. This happens regardless of the siz= e > of the drain At this point, the oil out flow rate must equal the oil in > flow rate. The size of the drain limits the internal pressure of the > unit. The larger size drain allows the oil to be removed by gravity alon= e > and prevents the oil from coming out of the added vent. With the vent > connected to the engine crankcase above the oil level, the pressure insid= e > the redrive is now the same as the pressure inside the crankcase. > > > > Steve Boese > > > >> On Mar 5, 2021, at 5:51 AM, Jeff Whaley jwhaley@datacast.com < > flyrotary@lancaironline.net> wrote: > >> > >> =EF=BB=BF=E2=97=86 This message was sent from a non-UWYO address. Plea= se exercise > caution when clicking links or opening attachments from external sources. > >> > >> > >> Hi Steve B., with respect to your response about drain hole diameter .= .. > >> What is the size of your oil inlet hose? > >> Did you experiment with oil inlet size - if oil won't all come OUT > perhaps we are putting too much IN? > >> Just a thought. > >> Jeff > >> > >> Finn, > >> > >> When I installed a vent in the top of my RD-1C drive it acted as an > additional drain. The drive operated completely filled with oil until th= e > size of the original rear drain was increased to an ID of ~5/8" (1/2" NPT > pipe). > >> > >> Steve Boese > >> > >> > >> -- > >> 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 > > > > > --- > This email has been checked for viruses by Avast antivirus software. > https://www.avast.com/antivirus > > > -- > Homepage: http://www.flyrotary.com/ > Archive and UnSub: > http://mail.lancaironline.net:81/lists/flyrotary/List.html > --000000000000bc5b1b05bccf2ca1 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
You= just need to add a scavenge pump on the drain.

;-)

On Fri, Mar 5, 2021 at 1:28 PM Finn Lassen = finn.lassen@verizon.net <= flyrotary@lancaironline.net<= /a>> wrote:
S= o you're saying that the bigger drain hole and addition of vent will not prevent the drive to fill up with oil?=C2=A0 :(

Finn

On 3/5/2021 12:22 PM, Sboese
sboese@uwyo.edu wrote:
> Jeff,
>
> The supply lines to my redrives are AN4.=C2=A0 The oil flow rate is re= stricted internally by the construction of the redrive.=C2=A0 Without a ven= t, the air initially inside the unit is entrained in the oil primarily by t= he action of the gears, the air is eliminated through the drain, and the un= it is quickly completely filled with oil. This happens regardless of the si= ze of the drain At this point, the oil out flow rate must equal the oil in = flow rate.=C2=A0 The size of the drain limits the internal pressure of the = unit.=C2=A0 The larger size drain allows the oil to be removed by gravity a= lone and prevents the oil from coming out of the added vent.=C2=A0 With the= vent connected to the engine crankcase above the oil level, the pressure i= nside the redrive is now the same as the pressure inside the crankcase.
>
> Steve Boese
>
>> On Mar 5, 2021, at 5:51 AM, Jeff Whaley jwhaley@datacast.com <flyrotary@lancaironline.= net> wrote:
>>
>> =EF=BB=BF=E2=97=86 This message was sent from a non-UWYO address. = Please exercise caution when clicking links or opening attachments from ext= ernal sources.
>>
>>
>> Hi Steve B., with respect to your response about drain hole diamet= er ...
>> What is the size of your oil inlet hose?
>> Did you experiment with oil inlet size - if oil won't all come= OUT perhaps we are putting too much IN?
>> Just a thought.
>> Jeff
>>
>> Finn,
>>
>> When I installed a vent in the top of my RD-1C drive it acted as a= n additional drain.=C2=A0 The drive operated completely filled with oil unt= il the size of the original rear drain was increased to an ID of ~5/8"= (1/2" NPT pipe).
>>
>> Steve Boese
>>
>>
>> --
>> Homepage:=C2=A0 http://www.flyrotary.com/
>> Archive and UnSub:=C2=A0 =C2=A0ht= tp://mail.lancaironline.net:81/lists/flyrotary/List.html
> --
> Homepage:=C2=A0 http://www.flyrotary.com/
> Archive and UnSub:=C2=A0 =C2=A0http:/= /mail.lancaironline.net:81/lists/flyrotary/List.html
>


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