[NEW] (PDF) Air Force C-130 Rainbow Fitting Diagnostic Technology Development | เครื่องบิน c130 – POLLICELEE

เครื่องบิน c130: คุณกำลังดูกระทู้

evaluated the

cause of

the crack

emission during the

unload

procedure, and it was postulated that small particles of material

debris located

in the crack

were compressed during

the unload

process, which

provided

the

event emission.

Though

this

was

not necessarily expected, this

occurrence provides a positive

indication event for fault detection and localization.

The se

cond t

est co

nsiste

d of g

atheri

ng aco

ustic

emission da

ta

during the implem

entati

on of the aircraft fueli

ng procedu

re. The

proced

ure

cons

isted

of

add

ing

a

total

of

36,0

00

lbs

of

fuel

in

the

fo

l-

lowing

seque

nce:

fuel

was

rst

added

to t

he nu

mber

1 an

d 4

inter

nal wing tanks,

then to

the number 2

and 3

internal wing tanks

and then

to

the

extern

al tanks

that

hang under

the wings.

The

result

s f

rom

the

upp

er

right

rain

bow

tting ar

e s

hown

in

gure 12

.

Figure 12 – Results of AE Fuel Loading T

est

The high amplitude

events shown on

the plot between

location

25 and

30, coincide

well with

the location

of the

crack in

the right

upper rainbow 

tting.

These emissions had

the highest magni-

tude

events during

the

test.

Several

additional

low

amplitude

AE events were detected at the number two bolt location and at

wing positions 10 to 15.

A

cursory eddy current inspection

after the

testing was com-

pleted did not provide an indication of

cracks in these locations.

The

Air

Force

is

planning

on

removing

and

r

eplacing

the

rainbow

ttings on the test aircraft. The 

ttings will be sent to ARL

Penn

State for further

inspection. The

objective is to

correlate the

eld

AE results to any cracks that exist but were not identi

ed previ-

ously

. So the signi

cance of these events will not

be known until

after the rainbow 

tting is removed and examined.

Conclusions

The

Air

Force

has

a

signi

cant need for the development and

application

of a non-destructive inspection

technology

for

the

evaluation of

C-130 rainbow

ttings.

Though the

eddy current

technology is effective for

the detection of large cracks

in acces-

sible

areas

of

the

tting

or

when

the

inspection is limited

to

a

small region of

the 

tting.

This

technology is

not the

optimum

approach

for

regular

inspections of a large number of

aircraft

with the objective

of having a

high probability of

detections for

cracks of a certain length.

Based

on the testing conducted at the

component

level

in the

laboratory

and

at the aircraft

level

in a 

eld environment, the

acoustic emission

technology

has demonstrated

in that

it can

provide a less labor intensive and possible higher probability of

detection

capability

than

eddy

current

technology

.

Before

this

technology can be widely utilized and implemented further

testing must be conducted to evaluate several factors including:

the determination

of

the

probability of

detection,

evaluation of

the

sources

of

false positives and optimization and formaliza-

tion of the load application procedure.

The

AE technology

has the

potential

to be

further developed

and applied as an ISHM

capability that would provide

a regular

assessment

of

rainbow

tting

integrity

and

crack

propagation.

The C-130

aircraft

will continue

to

be utilized

by

the

Air For

ce for

a decade

or

more, so

the

need for

reliable

and accurate

inspec-

tion and health assessment technologies will become even more

necessary in the years to come.

Acknowledgements

This

work

is supported by the Air For

ce

Research

Laboratory

under subcontract

number

06-S508-009-09-C1

through

UTC.

The

content

of

the

information

does

not

necessarily

re

ect

the

position

or

policy

of

the

Government,

and

no

of

cial endorse-

ment should be inferred.

The principal

investigator for this pr

oject was

Jeffrey Banks

who can reached at 814-863-3859 or jcb242@psu.edu.

References

1.

W

arner Robins-ALC/ENFM, Flight/Mechanical Systems

Division,

T

echnology

and

Engineering

Directorate,

‘Failure

Analysis of

a Lower

Center W

ing

Joint Fitting

From

an MC-130H

Aircraft’, Report

Number: 04-MF

A-

026, File Number: C130-612, September 28, 2004

2.

P

.

Christiansen;

G.R.

Bateman;

A.

Navarrete;

‘C-130

Center Wing MSD/MED Risk Analysis’,

2006 USAF Air-

craft Structural Integrity

Program Confer

ence, November

28, 2006

3.

American Society for

Testing and

Materials, ‘Standard

Guide for

Determining

the Reproducibility

of

Acoustic

Emission Sensor Response’, E 976-94, 1998.

4.

Peter J. Schull;

Nondestructive Evaluation: Theory, T

ech-

niques and Applications, Marcel Dekker

, Inc., 2002

7

http://theRIAC.org

[NEW] (PDF) Air Force C-130 Rainbow Fitting Diagnostic Technology Development | เครื่องบิน c130 – POLLICELEE

evaluated the

cause of

the crack

emission during the

unload

procedure, and it was postulated that small particles of material

debris located

in the crack

were compressed during

the unload

process, which

provided

the

event emission.

Though

this

was

not necessarily expected, this

occurrence provides a positive

indication event for fault detection and localization.

The se

cond t

est co

nsiste

d of g

atheri

ng aco

ustic

emission da

ta

during the implem

entati

on of the aircraft fueli

ng procedu

re. The

proced

ure

cons

isted

of

add

ing

a

total

of

36,0

00

lbs

of

fuel

in

the

fo

l-

lowing

seque

nce:

fuel

was

rst

added

to t

he nu

mber

1 an

d 4

inter

nal wing tanks,

then to

the number 2

and 3

internal wing tanks

and then

to

the

extern

al tanks

that

hang under

the wings.

The

result

s f

rom

the

upp

er

right

rain

bow

tting ar

e s

hown

in

gure 12

.

Figure 12 – Results of AE Fuel Loading T

est

The high amplitude

events shown on

the plot between

location

25 and

30, coincide

well with

the location

of the

crack in

the right

upper rainbow 

tting.

These emissions had

the highest magni-

tude

events during

the

test.

Several

additional

low

amplitude

AE events were detected at the number two bolt location and at

wing positions 10 to 15.

A

cursory eddy current inspection

after the

testing was com-

pleted did not provide an indication of

cracks in these locations.

The

Air

Force

is

planning

on

removing

and

r

eplacing

the

rainbow

ttings on the test aircraft. The 

ttings will be sent to ARL

Penn

State for further

inspection. The

objective is to

correlate the

eld

AE results to any cracks that exist but were not identi

ed previ-

ously

. So the signi

cance of these events will not

be known until

after the rainbow 

tting is removed and examined.

Conclusions

The

Air

Force

has

a

signi

cant need for the development and

application

of a non-destructive inspection

technology

for

the

evaluation of

C-130 rainbow

ttings.

Though the

eddy current

technology is effective for

the detection of large cracks

in acces-

sible

areas

of

the

tting

or

when

the

inspection is limited

to

a

small region of

the 

tting.

This

technology is

not the

optimum

approach

for

regular

inspections of a large number of

aircraft

with the objective

of having a

high probability of

detections for

cracks of a certain length.

Based

on the testing conducted at the

component

level

in the

laboratory

and

at the aircraft

level

in a 

eld environment, the

acoustic emission

technology

has demonstrated

in that

it can

provide a less labor intensive and possible higher probability of

detection

capability

than

eddy

current

technology

.

Before

this

technology can be widely utilized and implemented further

testing must be conducted to evaluate several factors including:

the determination

of

the

probability of

detection,

evaluation of

the

sources

of

false positives and optimization and formaliza-

tion of the load application procedure.

The

AE technology

has the

potential

to be

further developed

and applied as an ISHM

capability that would provide

a regular

assessment

of

rainbow

tting

integrity

and

crack

propagation.

The C-130

aircraft

will continue

to

be utilized

by

the

Air For

ce for

a decade

or

more, so

the

need for

reliable

and accurate

inspec-

tion and health assessment technologies will become even more

necessary in the years to come.

Acknowledgements

This

work

is supported by the Air For

ce

Research

Laboratory

under subcontract

number

06-S508-009-09-C1

through

UTC.

The

content

of

the

information

does

not

necessarily

re

ect

the

position

or

policy

of

the

Government,

and

no

of

cial endorse-

ment should be inferred.

The principal

investigator for this pr

oject was

Jeffrey Banks

who can reached at 814-863-3859 or jcb242@psu.edu.

References

1.

W

arner Robins-ALC/ENFM, Flight/Mechanical Systems

Division,

T

echnology

and

Engineering

Directorate,

‘Failure

Analysis of

a Lower

Center W

ing

Joint Fitting

From

an MC-130H

Aircraft’, Report

Number: 04-MF

A-

026, File Number: C130-612, September 28, 2004

2.

P

.

Christiansen;

G.R.

Bateman;

A.

Navarrete;

‘C-130

Center Wing MSD/MED Risk Analysis’,

2006 USAF Air-

craft Structural Integrity

Program Confer

ence, November

28, 2006

3.

American Society for

Testing and

Materials, ‘Standard

Guide for

Determining

the Reproducibility

of

Acoustic

Emission Sensor Response’, E 976-94, 1998.

4.

Peter J. Schull;

Nondestructive Evaluation: Theory, T

ech-

niques and Applications, Marcel Dekker

, Inc., 2002

7

http://theRIAC.org


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AC-130 Gunship in Action – Firing All Its Cannons • Exercise Emerald Warrior


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► Emerald Warrior is a U.S. Special Operations Command sponsored mission rehearsal exercise during which joint special operations forces train to respond to real and emerging worldwide threats.
► The Lockheed AC130 gunship is a heavily armed, longendurance groundattack variant of the C130 Hercules transport fixedwing aircraft. It carries a wide array of antiground oriented weapons that are integrated with sophisticated sensors, navigation, and firecontrol systems. Unlike other military fixedwing aircraft, the AC130 relies on visual targeting. Because its large profile and low operating altitudes (around 7,000 ft) make it an easy target, it usually flies close air support missions at night.
Video Credit: U.S. Air Force | United States Department of Defense
Photo by Airman 1st Class Ericka Engblom
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AC-130 Gunship in Action - Firing All Its Cannons • Exercise Emerald Warrior

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4 thoughts on “[NEW] (PDF) Air Force C-130 Rainbow Fitting Diagnostic Technology Development | เครื่องบิน c130 – POLLICELEE”

  1. נשירת שיער בראי הרפואה הסינית.

    על פי הרפואה הסינית, ישנם מספר איברים האחראים
    על צמיחת השיער בראש: הכליות- אחראיות על הזנת הצ’י (אנרגיה) ויין (חומר) לכיוון הראש.
    מצב זה מאפשר צמיחה תקינה של שיער.

    Reply

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