Return-Path: Sender: (Marvin Kaye) To: lml Date: Wed, 02 Jul 2003 09:52:28 -0400 Message-ID: X-Original-Return-Path: Received: from [206.246.194.60] (HELO visi.net) by logan.com (CommuniGate Pro SMTP 4.1b8) with ESMTP id 2454266 for lml@lancaironline.net; Wed, 02 Jul 2003 08:58:10 -0400 Received: from [68.50.58.204] (HELO cp172883-b.arlngt01.va.comcast.net) by visi.net (CommuniGate Pro SMTP 4.0.6) with ESMTP id 109900345 for lml@lancaironline.net; Wed, 02 Jul 2003 08:56:15 -0400 Reply-To: From: "Bob Pastusek" X-Original-To: "Lancair Mailing List" Subject: RE: [LML] LIV-Nose Gear Doors X-Original-Date: Wed, 2 Jul 2003 09:00:08 -0400 X-Original-Message-ID: <027001c34099$dd333340$6601a8c0@cp172883-b.arlngt01.va.comcast.net> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0271_01C34078.56219340" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook 8.5, Build 4.71.2173.0 Importance: Normal X-MimeOLE: Produced By Microsoft MimeOLE V4.72.2106.4 In-Reply-To: This is a multi-part message in MIME format. ------=_NextPart_000_0271_01C34078.56219340 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 8bit Barry, There are a number of "gotchas" in this area, all centered around the fact that you're working this before the lower cowl is fitted--and that is largely determined by the cowl front/spinner alignment. If you haven't already done so, be sure the nose gear retracts cleanly into the gear well, and is very close to centered--1/4" off center is probably too much to accommodate the door opening/closing. We had to move the nose gear pivot mounting pads slightly (and install over-size bolts to accommodate). You'll probably need to add washers/a spacer between the gear door mounting rails and the motor mount where they attach at the front. I'd insert the spacers needed to keep the rails parallel, but would not drill/permanently attach the rails to the motor mount during your current work. You can use small c-clamps to hold them firmly in position while you're working. Reason is that you'll almost certainly need to move them up or down slightly to align with the lower cowling AFTER you get it fitted to the spinner aligned and fitted to the firewall. I just finished this task and wound up making new spacers that I riveted to the rails and drilled to match the motor mount holes. The spring-loaded door operating arm that pivots at the back of the motor mount has Delrin blocks that control it's travel limits. Lots of flexibility to adjust open and close limits with these blocks. Keep that in mind when you get frustrated... Also, the position of the short operating rods between the gear doors and this arm is very critical for clearance with all the moving parts. Don't just mount the angle brackets to the gear doors using measurements in the book. Try the fit/movement. Also, make the ball pivot as far inboard from the hinge line as you can and still achieve the needed clearance. Reason is that when the doors are closed, there is almost a direct line from the hinge line through this operating arm--making the final closing a difficult to impossible adjustment. I've seen a number of IV-P's with these short rods bent to provide clearance. We managed to make ours work without bending, but at least twice during the process I was tempted to just bend them and be done with it... Write me with any questions you may have. Good Luck, Bob Pastusek -----Original Message----- From: Lancair Mailing List [mailto:lml@lancaironline.net]On Behalf Of F. Barry Knotts Sent: Wednesday, July 02, 2003 7:31 AM To: Lancair Mailing List Subject: [LML] LIV-Nose Gear Doors I’m starting on the nose gear doors for a IV-P. For the builders who have been down that road, any important “issues” or “gotchas” or “wish-I’ d-done-it-that-ways” that I should be aware of in building the doors? Barry Knotts bknotts@earthlink.net L-IV P, Conti-TSIO 550, 20%, Toledo, Ohio. ------=_NextPart_000_0271_01C34078.56219340 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Barry,
 
There=20 are a number of "gotchas" in this area, all centered around the fact = that you're=20 working this before the lower cowl is fitted--and that is largely = determined by=20 the cowl front/spinner alignment. If you haven't already done so, be = sure the=20 nose gear retracts cleanly into the gear well, and is very close to=20 centered--1/4" off center is probably too much to accommodate the door=20 opening/closing. We had to move the nose gear pivot mounting pads = slightly (and=20 install over-size bolts to accommodate).
 
You'll=20 probably need to add washers/a spacer between the gear door mounting = rails and=20 the motor mount where they attach at the front. I'd insert the spacers = needed to=20 keep the rails parallel, but would not drill/permanently attach the = rails to the=20 motor mount during your current work. You can use small c-clamps to hold = them=20 firmly in position while you're working. Reason is that you'll almost = certainly=20 need to move them up or down slightly to align with the lower cowling = AFTER you=20 get it fitted to the spinner aligned and fitted to the firewall. I just = finished=20 this task and wound up making new spacers that I riveted to the rails = and=20 drilled to match the motor mount holes.
 
The=20 spring-loaded door operating arm that pivots at the back of the motor = mount has=20 Delrin blocks that control it's travel limits. Lots of flexibility to = adjust=20 open and close limits with these blocks. Keep that in mind when you get=20 frustrated... Also, the position of the short operating rods between the = gear=20 doors and this arm is very critical for clearance with all the moving = parts.=20 Don't just mount the angle brackets to the gear doors using measurements = in the=20 book. Try the fit/movement. Also, make the ball pivot as far inboard = from the=20 hinge line as you can and still achieve the needed clearance. Reason is = that=20 when the doors are closed, there is almost a direct line from the hinge = line=20 through this operating arm--making the final closing a difficult to = impossible=20 adjustment. I've seen a number of IV-P's with these short rods bent to = provide=20 clearance. We managed to make ours work without bending, but at least = twice=20 during the process I was tempted to just bend them and be done with=20 it...
 
Write=20 me with any questions you may have.
 
Good=20 Luck,

Bob Pastusek
-----Original Message-----
From: Lancair Mailing = List=20 [mailto:lml@lancaironline.net]On Behalf Of F. Barry=20 Knotts
Sent: Wednesday, July 02, 2003 7:31 AM
To: = Lancair=20 Mailing List
Subject: [LML] LIV-Nose Gear = Doors

I=92m starting on the = nose gear=20 doors for a IV-P.  For the builders who have been down that road, = any=20 important =93issues=94 or =93gotchas=94 or = =93wish-I=92d-done-it-that-ways=94 that I should=20 be aware of in building the doors?

 

Barry = Knotts

bknotts@earthlink.net

L-IV P, Conti-TSIO 550, = 20%,=20 Toledo,=20 Ohio.

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