X-Virus-Scanned: clean according to Sophos on Logan.com From: "David Leonard" Received: from mail-ig0-f179.google.com ([209.85.213.179] verified) by logan.com (CommuniGate Pro SMTP 6.1.8) with ESMTPS id 8326963 for flyrotary@lancaironline.net; Thu, 14 Jan 2016 14:57:10 -0500 Received-SPF: pass receiver=logan.com; client-ip=209.85.213.179; envelope-from=wdleonard@gmail.com Received: by mail-ig0-f179.google.com with SMTP id z14so200967660igp.0 for ; Thu, 14 Jan 2016 11:57:10 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :content-type; bh=yMW/vuWG6vPDQn9r/j+dlQ/De+o1xv8jWvdgROLMcZw=; b=gd8OkQbbllWT9g0yVG7FDSXGuU57QhCwLraKs0ZeF9SQKbGQo3hoWnTemrqnYsERVb HSmBAZx+fLpLh/7nbjQ9IyZvmegV/zxRPX2bP/0PQIVtLa/FOALvJqS8ckKPaXjArXnO XCUxm+vE0MEdlmpq7n7uVjNEDEC3MTbToqU3ZIysu35DivSRYD1IHYr7ryDOeoBAlqoM eDsxKZNZsd1aKs0+hrl/PWUyAPSfHfj/O5Dx4GBi4lmmv0QecrfUBvN/dMOsgWDAqSe6 mPENp8nu6NzzHuAPD6oHxBEFG2NPhixzyJpxOjiOv9XMuhuWH0NR1ldq67kYJaQQOr4b RYfw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:date :message-id:subject:from:to:content-type; bh=yMW/vuWG6vPDQn9r/j+dlQ/De+o1xv8jWvdgROLMcZw=; b=bpmyHtnPkvnFLgUc+Yc89c4SOtt5itpiBmqZVRqUSmM8nWp8ISV4esR+QCJCAfGkfx o3LLc6YDmSmTyRoD8ZzRd1du3XbIcxk/u/sXOJl9+qv3Jn97vr/xZP6jCdR2qDXXMzeH 85pFmEsKBCyHohV23L8aF7D8oqdpVexr147yyGhoPJVSY1xg/E64P6QI6ynk+TK4D92f i97zUZzGipSqejLfHHSuxRRYzRQCgv8ONLqolllGHjeTjKuwgVgXLBfri0Qp6KuMoqow p0V7m7uP/V69r30hDZETKPcOF89CDY5Mp1CNLs6ltK6bUMhW9xmACWKLNWahixg1ciWd 0hBw== X-Gm-Message-State: ALoCoQkN4TV9SPX41E1Rcm6UhNl64H835X7j4KRh31vAcztPZ65vjaOSWscYMuNDxXOfCTq4r241XiayiJus753YzFSMUOIyig== MIME-Version: 1.0 X-Received: by 10.50.70.100 with SMTP id l4mr6757344igu.69.1452801412417; Thu, 14 Jan 2016 11:56:52 -0800 (PST) Received: by 10.79.69.129 with HTTP; Thu, 14 Jan 2016 11:56:52 -0800 (PST) In-Reply-To: References: Date: Thu, 14 Jan 2016 11:56:52 -0800 Message-ID: Subject: Re: [FlyRotary] Re: Oil Scavenge Pump vs Custom Oil Pan To: Rotary motors in aircraft Content-Type: multipart/alternative; boundary=047d7b4140661de02e052950b03f --047d7b4140661de02e052950b03f Content-Type: text/plain; charset=UTF-8 Hi Charlie, With a scavenge I could make a separate sump for gear box oil. The RD units require full pressure without a restrictor, but there are pumps that will do the trick although they would probably require a pressure regulator. Dave On Thu, Jan 14, 2016 at 11:05 AM, Charlie England < flyrotary@lancaironline.net> wrote: > 5) How would a scavenge pump allow different oil in the gear box? Unless > you plan on an extra high pressure pump to supply the sleeve bearing... > > The question does bring up one of my own; is/was there a recommendation > for a restricter in the supply line to the gearbox? I have a vague memory > that I'm not at all sure is real. > > Charlie > > On Thu, Jan 14, 2016 at 11:11 AM, David Leonard < > flyrotary@lancaironline.net> wrote: > >> Hi All, >> >> I have decided to install an oil scavenge system to return the oil from >> Tracy's gear box and perhaps from my turbo as well. I am really getting >> tired of all the oil getting all over everything. It clearly seems to be >> coming from the area between the RD1B and engine, which means that it is >> probably coming past the RD1B oil seal. Tracy calls for a nice big line >> and downhill only run of the oil to a point that is higher than the oil >> level in the sump. However, there is precious little elevation drop and I >> have not been able to achieve those requirements with a gravity only >> system. If I run the oil level very low in the sump the problem is >> improved, but I think it is time for a better solution. >> >> I am considering either a custom oil pan that allows for a deeper drop of >> the oil, or a scavenge pump. >> >> The benefit of the custom oil pan is that it can be an improvement in >> weight over the stock pan, and requires no moving parts or power and is >> unlikely to fail. The scavenge pump is nice because it would be an easier >> installation and will probably be more effective at fixing my solution, >> though I do worry about adding another possible failure point. >> >> 1) Soliciting pinions on the decision between Scavenge pump and custom >> oil pan. >> >> 2) Recommendations on someone who makes custom oil pans and pickups? >> >> 3) If I choose a pump, does that solution require a tank or can the drain >> lines be connected directly to the pump? This would create a suction on >> the outlets of the RD1B and or the Turbo, does anyone see a problem with >> that? Drain oil from the RD1B too fast? Bad for turbo bearings? >> >> 4) Would I need 2 pumps for redundancy? I am leaning that way, which >> means I am leaning more toward custom oil pan. >> >> 5) Turbo drain back seem adequate, which means I could use the pump to >> isolate the Gear Box oil, allowing for different oil there. Thoughts on >> this option? >> >> Thanks for the input! >> >> Dave Leonard >> Turbo Rotary RV-6 N4VY >> > > --047d7b4140661de02e052950b03f Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable
Hi Charlie,

With a scavenge I could mak= e a separate sump for gear box oil.=C2=A0 The RD units require full pressur= e without a restrictor, but there are pumps that will do the trick although= they would probably require a pressure regulator.

Dave

= On Thu, Jan 14, 2016 at 11:05 AM, Charlie England <flyrotary@lan= caironline.net> wrote:
5) How would a scavenge pump allow different oil in the gear b= ox? Unless you plan on an extra high pressure pump to supply the sleeve bea= ring...

The question does bring up one of my own; is/was= there a recommendation for a restricter in the supply line to the gearbox?= I have a vague memory that I'm not at all sure is real.

=
Charlie

On Thu, Jan 14, 2016 a= t 11:11 AM, David Leonard <flyrotary@lancaironline.net> wrote:
Hi All,

I have decided to install an oil scavenge system to= return the oil from Tracy's gear box and perhaps from my turbo as well= .=C2=A0 I am really getting tired of all the oil getting all over everythin= g.=C2=A0 It clearly seems to be coming from the area between the RD1B and e= ngine, which means that it is probably coming past the RD1B oil seal.=C2=A0= Tracy calls for a nice big line and downhill only run of the oil to a poin= t that is higher than the oil level in the sump.=C2=A0 However, there is pr= ecious little elevation drop and I have not been able to achieve those requ= irements with a gravity only system.=C2=A0 If I run the oil level very low = in the sump the problem is improved, but I think it is time for a better so= lution.

I am considering either a custom oil pan t= hat allows for a deeper drop of the oil, or a scavenge pump.

=
The benefit of the custom oil pan is that it can be an improveme= nt in weight over the stock pan, and requires no moving parts or power and = is unlikely to fail.=C2=A0 The scavenge pump is nice because it would be an= easier installation and will probably be more effective at fixing my solut= ion, though I do worry about adding another possible failure point.

1) Soliciting pinions on the decision between Scavenge pu= mp and custom oil pan.

2) Recommendations on someo= ne who makes custom oil pans and pickups?

3) If I = choose a pump, does that solution require a tank or can the drain lines be = connected directly to the pump?=C2=A0 This would create a suction on the ou= tlets of the RD1B and or the Turbo, does anyone see a problem with that?=C2= =A0 Drain oil from the RD1B too fast?=C2=A0 Bad for turbo bearings?=C2=A0

4) Would I need 2 pumps for redundancy?=C2=A0 I am = leaning that way, which means I am leaning more toward custom oil pan.

5) Turbo drain back seem adequate, which means I could= use the pump to isolate the Gear Box oil, allowing for different oil there= .=C2=A0 Thoughts on this option?

Thanks for the in= put!

Dave Leonard
Turbo Rotary RV-6 N4VY=


--047d7b4140661de02e052950b03f--