The Murphy Builders Site

I'm stumped on what's intended for flaperon control horn (CC-43) alignment.
MAM says 7 5/8" push-pull tube connected to the horn. I can't tell if that
is for the mid-wing horn, root horn, or both. And what really stumps me is
figure 80 in old MAM or 10.14.5 in the newer MAM, where the drawing appears
that the root and middle horns are at different angles from each other -- MAM
shows the middle one sticking roughly straight down while the root control
horn end is 1/2" above the bottom of the wing surface (up/down are reversed
in the figure cuz it shows the wing upside down). For on-line reference, I
put a copy of that figure at http://mae.ucdavis.edu/ransom/Murphy/flaphorn.gif

I can't picture why the root horn should be 1/2" above the bottom of the wing
while the flaperon is in recessed position. Does MAM mean for this to be
when the flaperon is in the full down position instead of 20Deg recessed (up)
position?

Things "look" like they should work if MAM means both control horns on the
torque tube are the same angle with respect to each other and both PP tubes
are the same length ...and figure 80 is just a bad dream.

This might go easier if I could call someone, but with luck, a note or two
here will straighten me out.

Thanks,
-Ben/ 496R
Davis, CA




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I'm stumped on what's intended for flaperon control horn (CC-43) alignment.
MAM says 7 5/8" push-pull tube connected to the horn. I can't tell if that
is for the mid-wing horn, root horn, or both. And what really stumps me is
figure 80 in old MAM or 10.14.5 in the newer MAM, where the drawing appears
that the root and middle horns are at different angles from each other --
MAM shows the middle one sticking roughly straight down while the root
control horn end is 1/2" above the bottom of the wing surface (up/down are
reversed in the figure cuz it shows the wing upside down). For on-line
reference, I put a copy of that figure at
http://mae.ucdavis.edu/ransom/Murphy/flaphorn.gif

I can't picture why the root horn should be 1/2" above the bottom of the
wing while the flaperon is in recessed position. Does MAM mean for this to
be when the flaperon is in the full down position instead of 20Deg recessed
(up) position?

Things "look" like they should work if MAM means both control horns on the
torque tube are the same angle with respect to each other and both PP tubes
are the same length ...and figure 80 is just a bad dream.

This might go easier if I could call someone, but with luck, a note or two
here will straighten me out.

Thanks,
-Ben/ 496R
Davis, CA




-----------------------------------------------------
List archives located at:
https://www.dcsol.com/default.htm
username "rebel" password "builder"
Subscription services located at:
https://www.dcsol.com/public/code/html-subscribe.htm
List administrator: mike.davis@dcsol.com
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Hi Ben !

You DO have the ailerons set up so the horn on the inboard aileron
is on the wingtip side, and the horn on the outboard aileron is on the
fuselage side, so both horns are in the center of the wing - DON'T YOU ???
That's where the P-P tube connects to BOTH horns ...

Double check the length of that short tube in the center of the
flapperons - I've seen comments in the archives that the manual might
be off by an inch or more.... right, Wayne ??

The picture looks OK - the root horn would only move UPWARD to
LOWER the aileron from THAT full reflex position - no problem for the
vertical pushrods in the cockpit..... It would appear that the horns on
opposite ends of the torque tube are about 90 degrees apart.

......bobp

-------------------------------orig.-------------------------
On Saturday 07 August 2004 08:29 pm, bransom@dcsol.com wrote:

I'm stumped on what's intended for flaperon control horn (CC-43)

MAM says 7 5/8" push-pull tube connected to the horn. I can't tell if

is for the mid-wing horn, root horn, or both. And what really stumps me

figure 80 in old MAM or 10.14.5 in the newer MAM, where the drawing

that the root and middle horns are at different angles from each other --
MAM shows the middle one sticking roughly straight down while the root
control horn end is 1/2" above the bottom of the wing surface (up/down are
reversed in the figure cuz it shows the wing upside down). For on-line
reference, I put a copy of that figure at
http://mae.ucdavis.edu/ransom/Murphy/flaphorn.gif

I can't picture why the root horn should be 1/2" above the bottom of the
wing while the flaperon is in recessed position. Does MAM mean for this

be when the flaperon is in the full down position instead of 20Deg

(up) position?

Things "look" like they should work if MAM means both control horns on the
torque tube are the same angle with respect to each other and both PP

are the same length ...and figure 80 is just a bad dream.

This might go easier if I could call someone, but with luck, a note or two
here will straighten me out.

Thanks,
-Ben/ 496R
Davis, CA




-----------------------------------------------------
List archives located at:
https://www.dcsol.com/default.htm
username "rebel" password "builder"
Subscription services located at:
https://www.dcsol.com/public/code/html-subscribe.htm
List administrator: mike.davis@dcsol.com
-----------------------------------------------------