The Murphy Builders Site

I know Al Paxhia has installed the Navaid in the fuselage root rib with a
capstan servo for attachment to the aileron cable, so my question is mostly
for Al, although others might be interested. On the Navaid website it shows
that the servo can be obtained in three different configurations: Two crank
arm configurations with peak to peak travel of 1.25" or 2.0", and one
capstan configuration with peak to peak travel listed as 7.0". My question
is, how can we use the capstan configuration with that much throw when the
stop to stop travel of the aileron cable is only about 1.5"? Just for
clarity, everyone, I am talking about a Super Rebel installation.

Mike Kimball
SR #044




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The maximum movement of the aileron cable in my airplane is about 3/4"
maybe less. The servo does not have enough power to move much more than that
in my Moose. What this means is I must be close to on course for the AP to
lock on. Once on course it is hard for me to see any movement in the
aileron cable or stick. If they say 7" that is two revolutions of the
capstan this is some sort of maximum, I suppose it can do that but in a
Moose it doesn't need to. I hope this helps.
Al
----- Original Message -----
From: "Mike Kimball" <mkimball@gci.net>
To: <murphy-rebel@dcsol.com>
Sent: Sunday, December 29, 2002 5:31 PM
Subject: Yet another Navaid autopilot question

I know Al Paxhia has installed the Navaid in the fuselage root rib with a
capstan servo for attachment to the aileron cable, so my question is

mostly

for Al, although others might be interested. On the Navaid website it

shows

that the servo can be obtained in three different configurations: Two

crank

arm configurations with peak to peak travel of 1.25" or 2.0", and one
capstan configuration with peak to peak travel listed as 7.0". My

question

is, how can we use the capstan configuration with that much throw when the
stop to stop travel of the aileron cable is only about 1.5"? Just for
clarity, everyone, I am talking about a Super Rebel installation.

Mike Kimball
SR #044

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You answered the most important question: "Does it work?" Apparently, it
does. I don't mind doing a little flying to get the plane on course before
I let George take over the tedious "keep going that-a-way" part. Thanks for
the info.

Mike Kimball
SR #044

-----Original Message-----
From: mike.davis@dcsol.com [mailto:mike.davis@dcsol.com]On Behalf Of Al
& Deb Paxhia
Sent: Sunday, December 29, 2002 4:48 PM
To: murphy-rebel@dcsol.com
Subject: Re: Yet another Navaid autopilot question


The maximum movement of the aileron cable in my airplane is about 3/4"
maybe less. The servo does not have enough power to move much more than that
in my Moose. What this means is I must be close to on course for the AP to
lock on. Once on course it is hard for me to see any movement in the
aileron cable or stick. If they say 7" that is two revolutions of the
capstan this is some sort of maximum, I suppose it can do that but in a
Moose it doesn't need to. I hope this helps.
Al
----- Original Message -----
From: "Mike Kimball" <mkimball@gci.net>
To: <murphy-rebel@dcsol.com>
Sent: Sunday, December 29, 2002 5:31 PM
Subject: Yet another Navaid autopilot question

I know Al Paxhia has installed the Navaid in the fuselage root rib with a
capstan servo for attachment to the aileron cable, so my question is

mostly

for Al, although others might be interested. On the Navaid website it

shows

that the servo can be obtained in three different configurations: Two

crank

arm configurations with peak to peak travel of 1.25" or 2.0", and one
capstan configuration with peak to peak travel listed as 7.0". My

question

is, how can we use the capstan configuration with that much throw when the
stop to stop travel of the aileron cable is only about 1.5"? Just for
clarity, everyone, I am talking about a Super Rebel installation.

Mike Kimball
SR #044

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