Return-Path: Sender: (Marvin Kaye) To: lml Date: Wed, 06 Nov 2002 19:44:08 -0500 Message-ID: X-Original-Return-Path: Received: from imo-d02.mx.aol.com ([205.188.157.34] verified) by logan.com (CommuniGate Pro SMTP 4.0) with ESMTP id 1854735 for lml@lancaironline.net; Wed, 06 Nov 2002 17:00:55 -0500 Received: from Sky2high@aol.com by imo-d02.mx.aol.com (mail_out_v34.13.) id q.138.1730797d (3964) for ; Wed, 6 Nov 2002 17:00:46 -0500 (EST) From: Sky2high@aol.com X-Original-Message-ID: <138.1730797d.2afaeb0d@aol.com> X-Original-Date: Wed, 6 Nov 2002 17:00:45 EST Subject: Re: [LML] LNC2 Tail Incidence, Rudder Cables X-Original-To: lml@lancaironline.net MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="part1_138.1730797d.2afaeb0d_boundary" X-Mailer: AOL 8.0 for Windows US sub 416 --part1_138.1730797d.2afaeb0d_boundary Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit Rob, The following was sent as a response to queries you made 12 April 2000: >From Rob Wolf- There will always be some bend (either inside via the cable tube or in the cable at the exit) since the rudder bellcrank movement is in a plane 30 degrees from horizontal. I used the exit bubbles as delivered and ended up bending swaged cable end to reduce the angle change. This is NOT recommended since bending the fitting may weaken it. If you make the cable line up with the bellcrank movement, it will start too high inside the fuselage and will have to be brought down to the rudder pedal level eventually. Find somebody's lancair and measure he bellcrank location and check the movement. Make a template. Then you can locate the cable exit wherever you want. Your second query - <...rudder pedal cable OVER the main spar, rather than UNDER as indicated in the manual? It seems like a good idea to me (straighter guide tubes), as long as you can keep it from interfering with other installation details there> I ran my rudder cables as horizontallly as possible (both pilot and co-pilot) and over the spar. The interior cables run along the inside top of the elevator pushrod tunnel and crossover just forward of the seat back. They soon return to the console sides and then angle thru the console sides just behind the nose wheel housing. I am also using the adjustable rudder pedals. People have commented that they detect no resistance in the smooth operation of my rudder. Others have noted that those rudder systems with a contorted cable routing have a stiffness that actually provides a crude means of trim in cruise -- that is the rudder tends to stay where it is left. Your choice. The difficulties with a "top of the spar" system is that the crossover runs above the elevator pushrod, the glove box might be narrower or shallower, and the trim mechanism is a consideration as the cable might interfere. Mine required some minor rework when I went from the crucifix trim to Dick Reichel's geared wheel system. One other item - I ran a short cable thru the "S" tube of the adjustable pedals and swaged eyelets at both ends. About a foot aft of the pedals most rearward position, the rudder cables are also terminated with eyelets. The pedal cables and rudder cables are connected with turnbuckles. This arrangement provides for cable length adjustment and for the removal of the rudder pedals (especially the co-pilot side) by disconnecting the turnbuckle and unbolting the firewall cable termination. Scott Krueger N92EX --part1_138.1730797d.2afaeb0d_boundary Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: 7bit Rob,

The following was sent as a response to queries you made 12 April 2000:

From Rob Wolf-

<only to make a sharp bend to the rudder control horn, and thus have to scrape
along the aft end of the guide tube. >

There will always be some bend (either inside via the cable tube or in the cable at the exit) since the rudder bellcrank movement is in a plane 30 degrees from horizontal.

I used the exit bubbles as delivered and ended up bending swaged cable end to reduce the angle change. This is NOT recommended since bending the fitting may weaken it.

If you make the cable line up with the bellcrank movement, it will start too high inside the fuselage and will have to be brought down to the rudder pedal level eventually.

Find somebody's lancair and measure he bellcrank location and check the movement. Make a template. Then you can locate the cable exit wherever you want.

Your second query -

<...rudder pedal cable OVER the main spar, rather than UNDER as indicated in the
manual? It seems like a good idea to me (straighter guide tubes), as long as
you can keep it from interfering with other installation details there>

I ran my rudder cables as horizontallly as possible (both pilot and co-pilot) and over the spar. The interior cables run along the inside top of the elevator pushrod tunnel and crossover just forward of the seat back. They soon return to the console sides and then angle thru the console sides just behind the nose wheel housing.

I am also using the adjustable rudder pedals. People have commented that they detect no resistance in the smooth operation of my rudder. Others have noted that those rudder systems with a contorted cable routing have a stiffness that actually provides a crude means of trim in cruise -- that is the rudder tends to stay where it is left. Your choice.

The difficulties with a "top of the spar" system is that the crossover runs above the elevator pushrod, the glove box might be narrower or shallower, and the trim mechanism is a consideration as the cable might interfere. Mine required some minor rework when I went from the crucifix trim to Dick Reichel's geared wheel system.

One other item - I ran a short cable thru the "S" tube of the adjustable pedals and swaged eyelets at both ends. About a foot aft of the pedals most rearward position, the rudder cables are also terminated with eyelets. The pedal cables and rudder cables are connected with turnbuckles. This arrangement provides for cable length adjustment and for the removal of the rudder pedals (especially the co-pilot side) by disconnecting the turnbuckle and unbolting the firewall cable termination.

Scott Krueger
N92EX
 --part1_138.1730797d.2afaeb0d_boundary--