X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Wed, 12 Jun 2013 15:11:45 -0400 Message-ID: X-Original-Return-Path: Received: from qmta07.westchester.pa.mail.comcast.net ([76.96.62.64] verified) by logan.com (CommuniGate Pro SMTP 6.0.5) with ESMTP id 6321542 for lml@lancaironline.net; Wed, 12 Jun 2013 13:02:47 -0400 Received-SPF: pass receiver=logan.com; client-ip=76.96.62.64; envelope-from=jmorgan1023@comcast.net Received: from omta15.westchester.pa.mail.comcast.net ([76.96.62.87]) by qmta07.westchester.pa.mail.comcast.net with comcast id nPgn1l0031swQuc57V2CJS; Wed, 12 Jun 2013 17:02:12 +0000 Received: from [192.168.1.115] ([24.11.157.196]) by omta15.westchester.pa.mail.comcast.net with comcast id nV251l00A4EXR5U3bV2Cqe; Wed, 12 Jun 2013 17:02:12 +0000 From: Jack Morgan Content-Type: multipart/alternative; boundary="Apple-Mail=_AE83E1E0-B105-48B6-BA01-C7F0E95072D9" Subject: Fwd: nose gear check X-Original-Date: Wed, 12 Jun 2013 13:00:59 -0400 References: <8B10677E-F3B8-47D6-B22A-26E3FC2B5464@comcast.net> X-Original-To: Lancair Mailing List X-Original-Message-Id: Mime-Version: 1.0 (Apple Message framework v1283) X-Mailer: Apple Mail (2.1283) --Apple-Mail=_AE83E1E0-B105-48B6-BA01-C7F0E95072D9 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=iso-8859-1 Oops. Got my up and down backwards. Once you have the latch released = move the gear lever to up with the small reservoir and avoid moving the = lever all the way down until you are through checking things out. As = long as you move the lever all down and bring the system to full = pressure you will insure the main down locks are secure when you set the = nose back down again. Keep in mind that the nose gear needs full pressure to insure it is = locked down. Jack Morgan Begin forwarded message: > From: Jack Morgan > Subject: nose gear check > Date: June 12, 2013 8:56:17 AM EDT > To: Lancair Mailing List >=20 > Hi Ralf, >=20 > I have often done this and see no problem. I hang a "box of rocks" = (Lancair part number 120099008-00-a.... just kidding) from the tail = tie down. Just add large rocks until the airplane sits back on the box = (over 100 lbs of rocks). I then have a friend blow gently into the pitot = to release the gear lever and move it part way. Turn the master off or = pull the pump breaker and move the gear lever to full down if you have = the standard hydraulic reservoir. There is not enough capacity with the = standard reservoir to put significant pressure on the main cylinders. = You can cycle the nose gear up and down without moving the gear lever = all the way up to lock it. I suggest using the master to control the = hydraulic pump since repeated cycling of the pump breaker will = eventually fail it. >=20 > If you have the large reservoir, discharge it by moving the gear lever = partially up and down until it is depleted and then use the pump as = above. >=20 > With the weight of the rocks and the airplane there is considerable = weight on the mains. I believe this set up is preferable to lifting the = nose as it gives extra insurance that the mains can't move. I have never = let the full hydraulic pressure come up so don't know if the mains can = actually lift the airplane and collapse. Perhaps others have experience = here and can comment. It is easy to partially retract the nose by = cycling the master and therefore the pump. You can then manually move = the nose gear up to check the door clearance and closure. Release one = door so you can see what is going on with the other door when moving the = wheel up into the tunnel. >=20 > Hope this helps. >=20 > Jack Morgan >=20 >=20 > On Jun 12, 2013, at 6:00 AM, Lancair Mailing List wrote: >=20 >> From: >> Subject: Nose gear check 4P >> Date: June 11, 2013 10:30:07 AM EDT >> To: lml@lancaironline.net >>=20 >>=20 >> Dear subscribers, >>=20 >> A friend took a picture of the belly of my airplane in flight with = the >> gear up. It looked to me that the nose gear door was not completely >> closed. I had that issue before on the ground before and adjusting = the >> threaded rods fixed it. >>=20 >> I am reluctant of putting the airplane on jacks and do a complete = gear >> check because my jack up equipment is not perfect and it is a major >> undertaking to get the airplane that high. >>=20 >> Someone told me (unfortunately I don't remember who) that I can leave >> the plane on the main gear and just use a hoist with ropes around the >> prop and lift the nose gear of the ground and then move the gear = switch >> up (after unlocking it). >>=20 >> The hydraulic pressure is not high enough to move the mains but it = will >> move the nose gear. Is this an ok procedure to use? Do I need to = remove >> the spinner if I wrap a rope around the 2 blades of my 3 blade prop? >>=20 >> Thanks for your input >>=20 >> Ralf >=20 --Apple-Mail=_AE83E1E0-B105-48B6-BA01-C7F0E95072D9 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=iso-8859-1 Oops. = Got my up and down backwards. Once you have the latch released move the = gear lever to up with the small reservoir and avoid moving the lever all = the way down until you are through checking things out. As long as you = move the lever all down and bring the system to full pressure you will = insure the main down locks are secure when you set the nose back down = again.

Keep in mind that the nose gear needs full = pressure to insure it is locked down.

Jack = Morgan

Begin forwarded message:

From: Jack Morgan <jmorgan1023@comcast.net>
Subject: nose gear check
Date: June 12, 2013 = 8:56:17 AM EDT
To: Lancair Mailing List <lml@lancaironline.net>

Hi Ralf,

I = have often done this and see no problem. I hang a "box of rocks" = (Lancair part number 120099008-00-a....   just kidding) from the = tail tie down. Just add large rocks until the airplane sits back on the = box (over 100 lbs of rocks). I then have a friend blow gently into the = pitot to release the gear lever and move it part way. Turn the master = off or pull the pump breaker and move the gear lever to full down if you = have the standard hydraulic reservoir. There is not enough capacity with = the standard reservoir to put significant pressure on the main = cylinders. You can cycle the nose gear up and down without moving the = gear lever all the way up to lock it. I suggest using the master to = control the hydraulic pump since repeated cycling of the pump breaker = will eventually fail it.

If you have the large = reservoir, discharge it by moving the gear lever partially up and down = until it is depleted and then use the pump as = above.

With the weight of the rocks and the = airplane there is considerable weight on the mains. I believe this set = up is preferable to lifting the nose as it gives extra insurance that = the mains can't move. I have never let the full hydraulic pressure come = up so don't know if the mains can actually lift the airplane and = collapse. Perhaps others have experience here and can comment. It is = easy to partially retract the nose by cycling the master and therefore = the pump. You can then manually move the nose gear up to check the door = clearance and closure. Release one door so you can see what is going on = with the other door when moving the wheel up into the = tunnel.

Hope this = helps.

Jack = Morgan


On Jun 12, 2013, at 6:00 = AM, Lancair Mailing List wrote: