Mixer Horn CC47 & CC48
Posted: Fri Feb 17, 2012 9:59 pm
Both CC47 and CC48 are called "mixer horns" per the manual. If I had known
this I would have been clearer in my original post. As previously discussed,
the forward mixer horn has a short arm and a long arm. The short arm points
forward and connects to the control stick assembly.
My question was related to the mixer horn located at the rear of the left
door. If you draw a line between the two horizontal bolt holes, and another
line perpendicular to that one, through the center line of the lower bolt
location you will see that the measurements on each side of the perpendicular
line are different. You will now have a "T" drawn on the mixer horn. The
top left half measures 1 7/8" and the top right half measures 1 11/16". So,
I am not sure which measurement goes forward and which one goes aft.
The photos I have of the factory airplane, show the control horns slightly
split where the push-pull tubes bolt to the control horns near the roof. Is
this the reason why the mixer horn (CC48) is not symmetrical?
By the way, thanks Curt for the reminder about the spacer between the rod end
bearings; I remember reading about this and at the time it didn't make sense,
now it does! I just made the push-pull tube that connects the two sticks
together; I set the final dimension using the stick attachment bolt holes in
the top of the control column (CC-35) and used locktight on the threads. I
am hoping this will keep my sticks vertical, if not, I will adjust later.
The manual calls for two 3/4 inch holes in the Aft side of the control column
(CC-35) to install bolts. I found that by drilling the right hole in the
forward side of the control column and installing a bolt from the forward
side instead of the aft side, it allowed more clearance for the bolt to
travel freely inside the tube. Also, using an MS21042-4 nut helped the
clearance. These nuts are shorter than AN365 but are equal in strength.
They also use a smaller socket size. For example, an MS21042-4 nut is
installed with a 5/16" socket which is not much larger than the base of the
nut. See aircraft Spruce catalog 2000-2002 page 87 for picture and more
info. Using this type of nut also allows you to drill smaller socket holes
in fus-5.
If you are in a buying mood there are some of these on Ebay, current price $2
for a bag of 150. They cost .19 each ($28.50 for 150) at Aircraft Spruce. I
use MS21042 nuts almost everywhere as they also weigh less (and I have
thousands of them).
Jim R254
-----------------------------------------------------------------
List archives located at: https://mail.dcsol.com/login
username "rebel" password "builder"
Unsubscribe: rebel-builders-unsubscribe@dcsol.com
List administrator: mike.davis@dcsol.com
-----------------------------------------------------------------
this I would have been clearer in my original post. As previously discussed,
the forward mixer horn has a short arm and a long arm. The short arm points
forward and connects to the control stick assembly.
My question was related to the mixer horn located at the rear of the left
door. If you draw a line between the two horizontal bolt holes, and another
line perpendicular to that one, through the center line of the lower bolt
location you will see that the measurements on each side of the perpendicular
line are different. You will now have a "T" drawn on the mixer horn. The
top left half measures 1 7/8" and the top right half measures 1 11/16". So,
I am not sure which measurement goes forward and which one goes aft.
The photos I have of the factory airplane, show the control horns slightly
split where the push-pull tubes bolt to the control horns near the roof. Is
this the reason why the mixer horn (CC48) is not symmetrical?
By the way, thanks Curt for the reminder about the spacer between the rod end
bearings; I remember reading about this and at the time it didn't make sense,
now it does! I just made the push-pull tube that connects the two sticks
together; I set the final dimension using the stick attachment bolt holes in
the top of the control column (CC-35) and used locktight on the threads. I
am hoping this will keep my sticks vertical, if not, I will adjust later.
The manual calls for two 3/4 inch holes in the Aft side of the control column
(CC-35) to install bolts. I found that by drilling the right hole in the
forward side of the control column and installing a bolt from the forward
side instead of the aft side, it allowed more clearance for the bolt to
travel freely inside the tube. Also, using an MS21042-4 nut helped the
clearance. These nuts are shorter than AN365 but are equal in strength.
They also use a smaller socket size. For example, an MS21042-4 nut is
installed with a 5/16" socket which is not much larger than the base of the
nut. See aircraft Spruce catalog 2000-2002 page 87 for picture and more
info. Using this type of nut also allows you to drill smaller socket holes
in fus-5.
If you are in a buying mood there are some of these on Ebay, current price $2
for a bag of 150. They cost .19 each ($28.50 for 150) at Aircraft Spruce. I
use MS21042 nuts almost everywhere as they also weigh less (and I have
thousands of them).
Jim R254
-----------------------------------------------------------------
List archives located at: https://mail.dcsol.com/login
username "rebel" password "builder"
Unsubscribe: rebel-builders-unsubscribe@dcsol.com
List administrator: mike.davis@dcsol.com
-----------------------------------------------------------------