X-Virus-Scanned: clean according to Sophos on Logan.com X-SpamCatcher-Score: 2 [X] Return-Path: Sender: To: lml@lancaironline.net Date: Sun, 01 Apr 2007 15:50:26 -0400 Message-ID: X-Original-Return-Path: Received: from relay2.av-mx.com ([137.118.16.124] verified) by logan.com (CommuniGate Pro SMTP 5.1.8) with ESMTP id 1961016 for lml@lancaironline.net; Sun, 01 Apr 2007 14:39:30 -0400 Received-SPF: pass receiver=logan.com; client-ip=137.118.16.124; envelope-from=pinetownd@volcano.net X-Virus-Scan-Time: 0 Received: from [137.118.16.54] (HELO mx4.av-mx.com) by relay2.av-mx.com (CommuniGate Pro SMTP 5.0.13) with SMTP id 672762357 for lml@lancaironline.net; Sun, 01 Apr 2007 14:38:43 -0400 Received: (qmail 15001 invoked by uid 504); 1 Apr 2007 18:38:43 -0000 Received: from 65-172-208-26.du.volcano.net (HELO DennisDell) (pinetownd@volcano.net@65.172.208.26) by 0 with SMTP; 1 Apr 2007 18:38:43 -0000 X-CLIENT-IP: 65.172.208.26 X-CLIENT-HOST: 65-172-208-26.du.volcano.net X-Original-Message-ID: <001c01c7748c$f59a44c0$6501a8c0@DennisDell> From: "Dennis Johnson" X-Original-To: "Lancair Mailing List" Subject: Legacy Useable Fuel X-Original-Date: Sun, 1 Apr 2007 11:38:35 -0700 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0019_01C77452.486E58C0" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.3028 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.3028 This is a multi-part message in MIME format. ------=_NextPart_000_0019_01C77452.486E58C0 Content-Type: text/plain; charset="Windows-1252" Content-Transfer-Encoding: quoted-printable Micah wrote: "Left tank ran down to 0.4 gallons, and right tank down to 0.1 gallons = before engine stopped making noise." Hi Micah, congrats on more than 100 hours in your Legacy! I have less = than 15 hours on my Legacy. (I'm keeping two running totals: one for = tach time and one for flight time, which means I never know how many = hours I have when someone asks.) I tested my useable fuel by running a tank dry while orbiting over the = runway. Each tank took almost exactly 30 gallons to fill it to a fat = finger's width below the bottom of the metal filler neck. How many = gallons did it take to fill each of your tanks back up? By the way, for those of you who haven't tried it, running a tank dry = went as expected (and hoped). I had my eyes glued on the fuel pressure = gage and my hand on the fuel selector. I thought the fuel pressure = would fluctuate in advance of the tank running dry, but the (metered) = pressure went from 11 psi to about 5 psi in the blink of an eye. (The = pressure may have gone to zero, but 5 psi was the last reading I saw = before turning my attention to switching tanks.) The engine didn't = change much; I think RPM and manifold pressure stayed pretty much the = same, but I could feel the sudden slowing of the airplane and it was = quieter, but there was still a lot of noise, nothing like I would expect = in a glider. Also in about the blink of the eye, I switched tanks and = turned the boost pump on low and the engine returned to normal = instantly. In fact, it came back so fast that later I wondered if it = really died. John Deakin has an interesting article on AvWeb recommending running = tanks dry as a routine procedure: = http://www.avweb.com/news/pelican/182044-1.html Despite the fact that = it worked as advertised the two times I tried it, I don't think I will = do it routinely because I was uncomfortable doing it and I expect my = passenger would be even more uncomfortable. But if I ever got in a = situation where I needed to, I would. So long as I'm this far off topic, I might just as well add that I = changed oil and cleaned the gascolator on Friday, both for the first = time. The Andair gascolator bowl had maybe 50 grains of something that = looked like rust and felt gritty like sand. They were smaller than = grains of sand on the beach. There was no water in the bowl. The = filter screen was completely clean, with only one or two stray pieces of = white fibers that looked like cotton. Except for the electric fuel = pump, I don't have any iron in the fuel system and don't know where the = rusty looking stuff came from. I washed out the wings with water before = attaching them to the airplane and the rust may have been in the airport = water system. Dennis Johnson Legacy RG N52PT =20 ------=_NextPart_000_0019_01C77452.486E58C0 Content-Type: text/html; charset="Windows-1252" Content-Transfer-Encoding: quoted-printable
Micah wrote:
 
"Left tank ran down to 0.4 gallons, and = right tank=20 down to 0.1 gallons before engine stopped making = noise."
 
Hi Micah, congrats on more than 100 hours in your Legacy!  I = have less=20 than 15 hours on my Legacy.  (I'm keeping two running totals:  = one for=20 tach time and one for flight time, which means I never know how many = hours I=20 have when someone asks.)
 
I tested my useable fuel by running a tank dry while orbiting = over the=20 runway.  Each tank took almost exactly 30 gallons to fill it to = a fat=20 finger's width below the bottom of the metal filler neck. =20 How many gallons did it take to fill each of your tanks back = up?
 
By the way, for those of you who haven't tried it, running a tank=20 dry went as expected (and hoped).  I had my eyes glued on the = fuel=20 pressure gage and my hand on the fuel selector.  I thought the fuel = pressure would fluctuate in advance of the tank running dry, but the = (metered)=20 pressure went from 11 psi to about 5 psi in the blink of an = eye.  (The=20 pressure may have gone to zero, but 5 psi was the last reading I saw = before=20 turning my attention to switching tanks.)  The engine didn't = change=20 much; I think RPM and manifold pressure stayed pretty much the same, but = I could=20 feel the sudden slowing of the airplane and it was = quieter, but=20 there was still a lot of noise, nothing like I would expect in a=20 glider.  Also in about the blink of the eye, I switched = tanks and=20 turned the boost pump on low and the engine returned to normal = instantly. =20 In fact, it came back so fast that later I wondered if it really = died.
 
John Deakin has an interesting article on AvWeb recommending = running tanks=20 dry as a routine procedure:  http://www.avweb= .com/news/pelican/182044-1.html   =20 Despite the fact that it worked as advertised the two times I tried it, = I don't=20 think I will do it routinely because I was uncomfortable doing it and I = expect=20 my passenger would be even more uncomfortable.  But if I ever got = in a=20 situation where I needed to, I would.
 
So long as I'm this far off topic, I might just as = well add that=20 I changed oil and cleaned the gascolator on Friday, both for the = first=20 time.  The Andair gascolator bowl had maybe 50 grains of something = that=20 looked like rust and felt gritty like sand.  They were smaller than = grains=20 of sand on the beach.  There was no water in the bowl.  = The=20 filter screen was completely clean, with only one or two = stray=20 pieces of white fibers that looked like cotton.  Except for the = electric=20 fuel pump, I don't have any iron in the fuel system and don't know = where=20 the rusty looking stuff came from.  I washed out the wings with = water=20 before attaching them to the airplane and the rust may have been in = the=20 airport water system.
 
Dennis Johnson
Legacy RG N52PT    
 
   
------=_NextPart_000_0019_01C77452.486E58C0--