X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from fed1rmmtao107.cox.net ([68.230.241.39] verified) by logan.com (CommuniGate Pro SMTP 5.2.5) with ESMTP id 3033199 for flyrotary@lancaironline.net; Sat, 19 Jul 2008 10:44:19 -0400 Received-SPF: none receiver=logan.com; client-ip=68.230.241.39; envelope-from=alventures@cox.net Received: from fed1rmimpo01.cox.net ([70.169.32.71]) by fed1rmmtao107.cox.net (InterMail vM.7.08.02.01 201-2186-121-102-20070209) with ESMTP id <20080719144339.OPLU29505.fed1rmmtao107.cox.net@fed1rmimpo01.cox.net> for ; Sat, 19 Jul 2008 10:43:39 -0400 Received: from BigAl ([72.192.137.74]) by fed1rmimpo01.cox.net with bizsmtp id rqjf1Z0031cVYgg03qjfgN; Sat, 19 Jul 2008 10:43:39 -0400 From: "Al Gietzen" To: "'Rotary motors in aircraft'" Subject: Re: pre-mix Date: Sat, 19 Jul 2008 07:45:03 -0800 Message-ID: <000201c8e9b6$6904efb0$6401a8c0@BigAl> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0003_01C8E973.5AE1AFB0" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.6626 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.3198 In-Reply-To: Importance: Normal This is a multi-part message in MIME format. ------=_NextPart_000_0003_01C8E973.5AE1AFB0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable About the fuel comming out of the fuel vent. I have a 4 gal header = tank like you. Sometimes when I started the fuel pump it would spit some = fuel out the vent, not every times. I built a small tank, about 2 ounces = and connected the vents from the two lower wing fuel tanks to it and the = header tank vent to the bottom of this small tank. The top of this tank is = vented. No more spit out, when the header tank spit it drains back to the lower = wing tanks. Rino; =20 My vent system has a manifold block where the lines from the sump and = the 2 strake tanks join up to the single vent line going out. I=92m going to = make a small accumulator as you did and install in place of the manifold block. This should allow any foam coming up from the sump to separate out, and = the fuel drain back to the tanks. How did you make your small tank? Since I don=92t have welding ability = so I=92m thinking of making it out of fiberglass. =20 Al G =20 Rino Lacombe Renesis Glass Goose ----- Original Message -----=20 From: Mark Steitle =20 To: Rotary motors in aircraft=20 Sent: Sunday, July 13, 2008 12:47 PM Subject: [FlyRotary] Re: pre-mix; great trip =20 Beautiful picture Al. Good observations on performance. Glad to hear = that everything is working well. =20 Mark S. On Sun, Jul 13, 2008 at 10:48 AM, Al Gietzen wrote: Another thing I notice is a small amount of fuel is coming out of the = fuel vent. The only explanation I can come up with is foaming/bubbles = forming in the return line after the pressure regulator. This goes into the = 3-gallon sump tank and up the =BC" vent line. This may have been occurring = previously, and the fuel evaporated as it went back along the surface; but now the = blue 2-cycle oil is left behind to be quite visible at the back of the cowl; = but I suspect the pre-mix is exacerbating the foaming.=20 =20 I notice the plugs have less carbon than before, and the inside of the exhaust exit is now very light grey. =20 Al -- Homepage: http://www.flyrotary.com/ Archive and UnSub: http://mail.lancaironline.net:81/lists/flyrotary/List.html =20 ------=_NextPart_000_0003_01C8E973.5AE1AFB0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

About the fuel comming out = of the fuel vent.   I have a 4 gal header tank like you.  = Sometimes when I started the fuel pump it would spit some fuel out the vent, not = every times.   I built a small tank, about 2 ounces and connected = the vents from the two lower wing fuel tanks to it and the header tank vent to the = bottom of this small tank.  The top of this tank is vented.  No more = spit out, when the header tank spit it drains back to the lower wing = tanks.

Rino;

 

My vent system has a manifold = block where the lines from the sump and the 2 strake tanks join up to the = single vent line going out.=A0 I’m going to make a small accumulator as you = did and install in place of the manifold block. =A0This should allow any foam = coming up from the sump to separate out, and the fuel drain back to the = tanks.

How did you make your small = tank?=A0 Since I don’t have welding ability so I’m thinking of making it = out of fiberglass.

 

Al G

 

Rino = Lacombe

Renesis Glass = Goose

=

----- Original Message = -----

Sent: Sunday, July 13, 2008 12:47 PM

Subject: [FlyRotary] Re: pre-mix; great trip

 

Beautiful picture Al.  Good observations on performance.  Glad to hear = that everything is working well. 

Mark S.

On Sun, Jul 13, 2008 at 10:48 = AM, Al Gietzen <ALVentures@cox.net> wrote:

Another thing = I notice is a small amount of fuel is coming out of the fuel vent.  The only explanation I can come up with is foaming/bubbles forming in the return = line after the pressure regulator.  This goes into the 3-gallon sump = tank and up the =BC" vent line.  This may have been occurring = previously, and the fuel evaporated as it went back along the surface; but now the blue = 2-cycle oil is left behind to be quite visible at the back of the cowl; but I = suspect the pre-mix is exacerbating the foaming.

 

I notice the = plugs have less carbon than before, and the inside of the exhaust exit is now very = light grey.

 

Al


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