From: Sky2high@aol.com
Message-ID: <a1.3e32176.2626ac3e@aol.com>
Date: Thu, 13 Apr 2000 00:51:10 EDT
Subject: LNC2 Rudder Cable Heights
To: lancair.list@olsusa.com
Mime-Version: 1.0

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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 -
<Okay.  Another question.  Has anyone besides Jim Michaels run the inboard 
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
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