X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from m12.lax.untd.com ([64.136.30.75] verified) by logan.com (CommuniGate Pro SMTP 5.1.12) with SMTP id 2330717 for flyrotary@lancaironline.net; Fri, 14 Sep 2007 09:21:56 -0400 Received-SPF: pass receiver=logan.com; client-ip=64.136.30.75; envelope-from=alwick@juno.com Received: from m12.lax.untd.com (localhost [127.0.0.1]) by m12.lax.untd.com with SMTP id AABDQXCXKACAWQP2 for (sender ); Fri, 14 Sep 2007 06:20:41 -0700 (PDT) X-UNTD-OriginStamp: L941HVjjYzDhN3itp//mkBI3DOOHxTmpzxPXbd1FLsnJgSoEGMkFpQ== Received: (from alwick@juno.com) by m12.lax.untd.com (jqueuemail) id MXLRVCUU; Fri, 14 Sep 2007 06:19:58 PDT To: flyrotary@lancaironline.net Date: Fri, 14 Sep 2007 06:19:00 -0700 Subject: Re: [FlyRotary] Re: need help Message-ID: <20070914.061905.2868.1.alwick@juno.com> X-Mailer: Juno 5.0.49 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary=--__JNP_000_0437.23ed.3ce9 X-Juno-Line-Breaks: 8-6,7-11,13-15,17-20,26-27,32-33,38-39,41,43-48,50,52-59,61,63-64,65-32767 From: al p wick X-ContentStamp: 14:7:305309925 X-MAIL-INFO:553e3e3b432ebae3fb5a373b8737cf1e232f02377f6eeb7a437f022f7f2a7f0e8fd367473e6f3b2b3b03431fcf4a3f1fe32e07d37bb3a7efd3d313d3afe79fdff7d39f3a8edfaf4a X-UNTD-Peer-Info: 127.0.0.1|localhost|m12.lax.untd.com|alwick@juno.com This message is in MIME format. Since your mail reader does not understand this format, some or all of this message may not be legible. ----__JNP_000_0437.23ed.3ce9 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit see bottom of page. http://www.maddyhome.com/canardpages/pages/alwick/index_files/Page467.htm -al On Thu, 13 Sep 2007 23:06:05 -0500 "Wendell Voto" writes: Al, Thanks for the reply, have been gone a while so late in response. Went to your site but didn't find anything about the wet fuel pump set up. I a very interested in this. Wendell Put a pressure gage between tank and pump. This will measure how much safety margin you have. It's that pressure drop at pump inlet that's your risk item. Compare that pressure to results from Hodges fuel tester and wham, you know exactly how close you are. This is a key safety concept...don't let yourself describe fuel system as good or bad....measure it! I know guys who used clear fuel lines so they could see the fuel turn to vapor, but you only see things when it's too late. Pressure gage tells you how far your design is from vapor lock. That way you know you will be safe when other factors affect vapor point. Like pump temp, fuel type, flight attitude. All filter screens that get plugged are from one cause....using vacuum cleaner to remove debris. Ordinary vacuum cleaner displaces too much air. It causes 80% of the debris near nozzle to shoot off to corners of tank. If you just put duct tape over most of the nozzle, then you have zero risk of debris. Glad you are concerned about pressure drop at inlet. You definitely don't want to add fine filter there. I just added wet fuel pumps to my plane. One of the safest approaches you can use. Details on my web site. -al wick Cozy IV powered by Turbo Subaru 3.0R with variable valve lift and cam timing. Artificial intelligence in cockpit, N9032U 240+ hours from Portland, Oregon Glass panel design, Subaru install, Prop construct, Risk assessment info: http://www.maddyhome.com/canardpages/pages/alwick/index.html -al wick Cozy IV powered by Turbo Subaru 3.0R with variable valve lift and cam timing. Artificial intelligence in cockpit, N9032U 240+ hours from Portland, Oregon Glass panel design, Subaru install, Prop construct, Risk assessment info: http://www.maddyhome.com/canardpages/pages/alwick/index.html ----__JNP_000_0437.23ed.3ce9 Content-Type: text/html; charset=us-ascii Content-Transfer-Encoding: quoted-printable

see bottom of page.

http://www.maddyhome.com/canardpages/pages/alwick/index_files/= Page467.htm

-al

On Thu, 13 Sep 2007 23:06:05 -0500 "Wendell Voto" <jwvoto@itlnet.net> writes:

Al,

Thanks for the reply, have been gone a while so late in = response.=20

Went to your site but didn't find anything about the wet fuel pump = set=20 up. I a very interested in this.

Wendell

Put a pressure gage between tank and pump. This will measure how = much=20 safety margin you have. It's that pressure drop at pump inlet that's = your=20 risk item. Compare that pressure to results from Hodges fuel tester and= =20 wham, you know exactly how close you are. This is a key safety=20 concept...don't let yourself describe fuel system as good or bad....= measure=20 it!

I know guys who used clear fuel lines so they could see the fuel = turn=20 to vapor, but you only see things when it's too late. Pressure gage = tells=20 you how far your design is from vapor lock. That way you know you will = be=20 safe when other factors affect vapor point. Like pump temp, fuel type,= =20 flight attitude.

All filter screens that get plugged are from one cause....using = vacuum=20 cleaner to remove debris. Ordinary vacuum cleaner displaces too much = air. It=20 causes 80% of the debris near nozzle to shoot off to corners of tank. = If you=20 just put duct tape over most of the nozzle, then you have zero risk of= =20 debris.

Glad you are concerned about pressure drop at inlet. You = definitely=20 don't want to add fine filter there.

I just added wet fuel pumps to my plane. One of the safest = approaches=20 you can use. Details on my web site.

-al wick
Cozy IV powered by Turbo Subaru 3.0R with variable= =20 valve lift and cam timing.
Artificial intelligence in cockpit, = N9032U=20 240+ hours from Portland, Oregon
Glass panel design, Subaru install,= Prop=20 construct, Risk assessment info:
= http://www.maddyhome.com/canardpages/pages/alwick/index.html

-al wick
Cozy IV powered by Turbo Subaru 3.0R = with=20 variable valve lift and cam timing.
Artificial intelligence in = cockpit,=20 N9032U 240+ hours from Portland, Oregon
Glass panel design, Subaru=20 install, Prop construct, Risk assessment=20 info:
http://www.maddyhome.com/canardpages/pages/alwick/index.html<= BR>

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