Moose--landings--tail "noise"--solved
Posted: Sat Feb 18, 2012 2:18 pm
Figured out what the noise is that I've heard since day one on landings
from the rear of the plane (on rough fields that is). Hard to describe,
but, while I always wondered, I wrote it off to "just everything flexing
around."
Today I was flexing the tailwheel with my foot after flying and one of
my A&P buddies noticed the fuselage forward of Station G oil canning
(pic posted on site under 107 - S/M Fuselage [make sure you select the
.jpg version if there are two out there--one's huge--I uploaded the .psd
one first by mistake]).
I have 215 hours on my Moose with no sign of fuselage problems (e.g.
bends, popped rivets) but seeing the fuselage flex there has me
wondering if I should add maybe some witches hat or other stiffener back
there. My friend said to simply use something like the below damping
material from Aircraft Spruce. He also suggested some of the insulation
/ heat shield one can get from an auto parts store--I searched a couple
of on-line auto places and couldnt' find anything comparable to the link
below.
I'd appreciate getting input from the group on this one--do I need to
add some strengthener to the fuselage or use some product like that
below to just dampen the noise?
Thank you,
Ted Waltman
Moose N142SR
http://www.aircraftspruce.com/catalog/a ... panels.php
SOUND & VIBRATION DAMPING PANELS
Designed for damping resonant vibrations of thin sheet metal, these
panels are pressure sensitive, specially compounded polyurethane damping
foam with an aluminum foil backing. The adhesive on the foam is
protected by a peel-off paper covering. It is an excellent insulator for
conducted heat and is an excellent heat reflector. Fireresistant and
self-extinguishing per FAA test procedure. Excellent moisture
resistance. Resistant to most solvents. Easily applied with only hand
pressure for a permanent bond even on rough, irregular surfaces. Used
extensively in commercial aircraft and highly recommended for metal home
builts. Apply to firewall, fuselage - anywhere a vibration problem
exists. Wt.4 oz./sq. ft., 1/4" thick. 6" x 48" (2 sq. ft.) P/N 09-30200
..................$21.60ea.
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from the rear of the plane (on rough fields that is). Hard to describe,
but, while I always wondered, I wrote it off to "just everything flexing
around."
Today I was flexing the tailwheel with my foot after flying and one of
my A&P buddies noticed the fuselage forward of Station G oil canning
(pic posted on site under 107 - S/M Fuselage [make sure you select the
.jpg version if there are two out there--one's huge--I uploaded the .psd
one first by mistake]).
I have 215 hours on my Moose with no sign of fuselage problems (e.g.
bends, popped rivets) but seeing the fuselage flex there has me
wondering if I should add maybe some witches hat or other stiffener back
there. My friend said to simply use something like the below damping
material from Aircraft Spruce. He also suggested some of the insulation
/ heat shield one can get from an auto parts store--I searched a couple
of on-line auto places and couldnt' find anything comparable to the link
below.
I'd appreciate getting input from the group on this one--do I need to
add some strengthener to the fuselage or use some product like that
below to just dampen the noise?
Thank you,
Ted Waltman
Moose N142SR
http://www.aircraftspruce.com/catalog/a ... panels.php
SOUND & VIBRATION DAMPING PANELS
Designed for damping resonant vibrations of thin sheet metal, these
panels are pressure sensitive, specially compounded polyurethane damping
foam with an aluminum foil backing. The adhesive on the foam is
protected by a peel-off paper covering. It is an excellent insulator for
conducted heat and is an excellent heat reflector. Fireresistant and
self-extinguishing per FAA test procedure. Excellent moisture
resistance. Resistant to most solvents. Easily applied with only hand
pressure for a permanent bond even on rough, irregular surfaces. Used
extensively in commercial aircraft and highly recommended for metal home
builts. Apply to firewall, fuselage - anywhere a vibration problem
exists. Wt.4 oz./sq. ft., 1/4" thick. 6" x 48" (2 sq. ft.) P/N 09-30200
..................$21.60ea.
-----------------------------------------------------------------
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
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