X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Sat, 07 Jun 2014 11:16:18 -0400 Message-ID: X-Original-Return-Path: Received: from nm10-vm4.access.bullet.mail.bf1.yahoo.com ([216.109.114.211] verified) by logan.com (CommuniGate Pro SMTP 6.0.9e) with ESMTPS id 6924067 for lml@lancaironline.net; Sat, 07 Jun 2014 07:41:50 -0400 Received-SPF: neutral receiver=logan.com; client-ip=216.109.114.211; envelope-from=browncc1@verizon.net DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=s2048; d=yahoo.com; b=YCuFZTgqCLKK6xOxGkaYyV12Lcmk3OXCb2xr9Ij9ouM+Lw8q1Id3YxVMRJTX4Sx6feSfUlD22j10koBQxnzgV6w0+d73O52zR+jeUIh8o9PrEMfDED52EKyyK6av5pknWM9WBRFwMScAE+0putQCETjHpo2G68guM5rhYv2SF82wuVsDIaVIx59BCm1I4LO7TPjFv1SMDpz0YcnVf5e+fEfcoDi9q/bjTRIh5T1rKKVMk99uDuegdBDLlUi9eaxbjbZwKL7qB9biMHQJMHDZ0vWJFi/1QGeqPE9q4TmWjgu+Yqd723Mq3m4FA9DsFzATywxUpz2GhbIt3UZLxEaWGQ==; Received: from [66.196.81.166] by nm10.access.bullet.mail.bf1.yahoo.com with NNFMP; 07 Jun 2014 11:41:15 -0000 Received: from [98.138.226.241] by tm12.access.bullet.mail.bf1.yahoo.com with NNFMP; 07 Jun 2014 11:41:15 -0000 Received: from [127.0.0.1] by smtp112.sbc.mail.ne1.yahoo.com with NNFMP; 07 Jun 2014 11:41:15 -0000 X-Yahoo-Newman-Id: 536687.78875.bm@smtp112.sbc.mail.ne1.yahoo.com X-Yahoo-Newman-Property: ymail-3 X-YMail-OSG: VUxAHp0VM1lwZrVwTyK38b2s8I2FU2ftbJiYKb6QRYwfH4H tmghnVyBE8ZSDIDJbdzbcElMxhUij4oxUVJQsLficXbdr9ncKUTU2bFq58mE PvAm4ynVdSM7yqf7GhtTprRFtr5a8RdhIZvN.O6F396jJDgYLZ2EdU4k8aaC eshN8blWE1Qj4Ax7mIwuN3P98webX5.u5SxMGVKsir076xigE7xp3QT3YUb6 I.L213VfhWANX5hPMVvuRn7BSvXcVJOR6XXJZil_sSIlqgdNIZgIQia.iVAh W9kDncXzxkzmhARYP.ntNBAv5bMVb7f1F63GowgyKpHrdw9j8tYxjFNPL9f7 Y72Fo2bWoBXMJmv5_DxB9REmzk5Mta0QuNV5Zalw2OalzkV92DOglPqkZVpt tYo6bvEwaWGG8vfhi6Nk2SRqQ.sQAW3yiFJj7aVJul9HBL2bid_ZkWX9HFWx jH_5PhzawIScIj58_OJQ7p5U3yIek3d_z3p2x.1xYVq1Piqg1X5NXDH_lo5L zo.UBHV3r29ax7S6tqJq22rrq.y.SsM_oGCCpTCLxruNgEg-- X-Yahoo-SMTP: F49l9g6swBC0R9n8vJIbm7Tf3P8Xlmia8rHIwTlO__Ml X-Rocket-Received: from chass-imac-2.home (browncc1@173.74.217.61 with plain [98.138.84.31]) by smtp112.sbc.mail.ne1.yahoo.com with SMTP; 07 Jun 2014 04:41:15 -0700 PDT From: Charles Brown Mime-Version: 1.0 (Apple Message framework v1085) Content-Type: multipart/alternative; boundary=Apple-Mail-2-779795922 Subject: [LML] Re: Legacy Oil Pan Quick Drain X-Original-Date: Sat, 7 Jun 2014 06:41:14 -0500 In-Reply-To: X-Original-To: Lancair Mailing List References: X-Original-Message-Id: <67A8B7E2-6B37-49F7-A4A0-FC648335E102@verizon.net> X-Mailer: Apple Mail (2.1085) --Apple-Mail-2-779795922 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=windows-1252 Just wanted to clear up some misinformation that I posted June 1. After = Bob Pastusek pointed out that 1/4" clearance in static conditions (on = ground, engine off) is probably not enough, and that interference with = the oil pan could cause a catastrophic oil leak, I re-checked and found = that I have about 1/2" clearance. Without going back to my logs, I = believe that after "correcting" the problem as described, I also found = that the overcenter links shipped with the kit were too long and got = Lancair to send the correcton ones which I installed prior to first = flight; so I have never flown with less that 1/2 inch clearance = (plus/minus engine motion). Charley =20 On Jun 3, 2014, at 7:19 AM, Robert R Pastusek wrote: Charlie, =20 To answer your specific question, there are no =93moving parts=94 in the = bottom of the -550 crankcase that can be brought into contact with the = oil pan=85part of the engine crankcase is a cast aluminum =93web=94 = across the bottom of the engine that separates the crankshaft and = similar from the oil pan itself. There is a steel pipe oil pickup that = runs forward from the back right side (looking forward at the prop) of = the crankcase, goes down, and makes a 90 degree left turn to sit at the = bottom of the pan and parallel to the cylinders. I can measure it if = desired, but I=92d estimate it to be approximately 12=94 forward from = the back of the pan at the lowest point where it runs =93across=94 the = pan. It=92s positioned very close to the bottom, of course, and has = multiple 1/8=94 holes on the bottom side to pick up oil. =20 Having said that, 1/10=94 inch is not enough clearance between the fixed = structure of the airplane and the engine=85especially the oil pan=85IMHO. = The engine moves around a LOT more than 1/10=94=85at least =BC=94, = probably more. You=92re likely getting away with your pan mod because = the engine moves forward and just a bit up when the prop is = pulling--thereby increasing clearance over the static=85but it=92s = dangerous to count on it. The aluminum pan is very thin, as you noted, = and a few minutes of contact with steel will put a hole in it=85then = quickly, no oil. =20 Hope this helps. =20 Bob =20 On Jun 1, 2014, at 8:49 AM, Charles Brown wrote: Dennis, I've had excellent results with that quick-drain system on my = Legacy / 550 also, over 300 hrs and a half-dozen oil changes. =20 I also had the oil pan clearance problem with the nosegear over-center = links, in fact my links actually retracted into contact (just barely) = with the oil pan. Being in a hurry to get flying, and thinking that the = oil pan is fairly thin and flexible, I did a redneck cure: taped two = stirring sticks, layerwise, on the bottom of the pan at the point of = interference, and manually retracted the nose gear (i.e., by lifting it = with my hands) a few times, thus using the O/C links themselves to bend = the oil pan to provide about 1/10 inch clearance in ground-retract = conditions. I painted the pan and looked for witness marks, but there = haven't been any in 350 hours. =20 =20 Perhaps someone who's been inside a 550 could comment on whether there's = anything immed inside the pan, or any other risk of bending it = inward/upward 1/10 inch near the center... I assume it's an ordinary = reservoir with an inch or so at least of clearance above it, give or = take non-structural items like a baffle. =20 Charley Brown Legacy 299 350 hours.= --Apple-Mail-2-779795922 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=windows-1252 Just = wanted to clear up some misinformation that I posted June 1.  After = Bob Pastusek pointed out that 1/4" clearance in static conditions (on = ground, engine off) is probably not enough, and that interference with = the oil pan could cause a catastrophic oil leak, I re-checked and found = that I have about 1/2" clearance.  Without going back to my logs, I = believe that after "correcting" the problem as described, I also found = that the overcenter links shipped with the kit were too long and got = Lancair to send the correcton ones which I installed prior to first = flight;  so I have never flown with less that 1/2 inch clearance = (plus/minus engine motion).

Charley =  

On Jun 3, 2014, at 7:19 AM, Robert R = Pastusek wrote:

To = answer your specific question, there are no =93moving parts=94 in the = bottom of the -550 crankcase that can be brought into contact with the = oil pan=85part of the engine crankcase is a cast aluminum =93web=94 = across the bottom of the engine that separates the crankshaft and = similar from the oil pan itself. There is a steel pipe oil pickup that = runs forward from the back right side (looking forward at the prop) of = the crankcase, goes down, and makes a 90 degree left turn to sit at the = bottom of the pan and parallel to the cylinders. I can measure it if = desired, but I=92d estimate it to be approximately 12=94 forward from = the back of the pan at the lowest point where it runs =93across=94 the = pan. It=92s positioned very close to the bottom, of course, and has = multiple 1/8=94 holes on the bottom side to pick up = oil.
Hope = this helps.
On Jun 1, 2014, at 8:49 AM, Charles = Brown <browncc1@verizon.net> = wrote:

Dennis, I've had = excellent results with that quick-drain system on my Legacy / 550 also, = over 300 hrs and a half-dozen oil = changes.
I also = had the oil pan clearance problem with the nosegear over-center links, = in fact my links actually retracted into contact (just barely) with the = oil pan.  Being in a hurry to get flying, and thinking that the oil = pan is fairly thin and flexible, I did a redneck cure:  taped two = stirring sticks, layerwise, on the bottom of the pan at the point of = interference, and manually retracted the nose gear (i.e., by = lifting it with my hands) a few times, thus using the O/C links = themselves to bend the oil pan to provide about 1/10 inch clearance in = ground-retract conditions.  I painted the pan and looked for = witness marks, but there haven't been any in 350 hours. =  
Perhaps = someone who's been inside a 550 could comment on whether there's = anything immed inside the pan, or any other risk of bending it = inward/upward 1/10 inch near the center...  I assume it's an = ordinary reservoir with an inch or so at least of clearance above it, = give or take non-structural items like a = baffle.
Charley = Brown
Legacy = 299
350 = hours.
= --Apple-Mail-2-779795922--