Maj Zach “Libi” McCarley, USMC VX-31, NAWS China Lake … Conference... · Maj Zach “Libi” McCarley, USMC VX-31, NAWS China Lake ... Is it Super Hornet wide or restricted

Maj Zach “Libi” McCarley, USMC VX-31, NAWS China Lake LtCol Tim “Boomer” Jorris, USAF 412 OG/Hypersonics CTF

NAVAIR Public Release SPR-2013-303 Distribution Statement A approved for public release, distribution is unlimited.

NAVAIR public release SPR-2013-303 1

http://en.wikipedia.org/wiki/File:Vx-31_logo.jpg

http://en.wikipedia.org/wiki/File:Society_of_Experimental_Test_Pilots_logo.jpg

Gun

Problem

DOE

Methodology

Analysis

Lessons

2


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12

Problem: Fleet reporting valid attacks on soft targets with enemy walking away unscathed.

Should be a hit ... but NOT!

NAVAIR public release SPR-2013-303

Rumors of AESA problems

Lots of anecdotal evidence

TOPGUN conducted TAC T&E 3 mil long

2 mils right (8 mil gun dispersion)

Is the software CCIP prediction good or not?

Is it Super Hornet wide or restricted to AESA?

What other factors might affect solution?


TOPGUN said no (3 mils / 2 mils)

What can I offer to the problem?

Scientific method?

Disciplined flight test?

Statistical significance?

If so, then how do I get results with

statistical significance?

If so, is it operationally significant?


Ammo M56 / M55 PGU-28 / PGU-27

Software Legacy / Assembly Language / X-Build / 25X HOL / C++ / H8

BAAT (Best Altitude Above Target) Radar / AGR (Air – Ground Ranging) DTED (Digital Terrain Elevation Data)

Radar APG-73 (Legacy) APG-79 /AESA (Active Electronically Scanned Array)


Example: 250 ft / 200 ft = 1.25


Ammo M56 / M55 PGU-28 / PGU-27

Software Legacy / Assembly Language / X-Build / 25X HOL / C++ / H8

BAAT Radar (AGR) DTED

Radar APG-73 APG-79


Jet type runs with ammo type

PGU-28 M56 PGU-27 all ammo

25X APG-73 AGR (no Legacy AESA) 5 5 5 15



25X APG-73 DTED (no Legacy AESA) 5 5 5 15



H8 APG-73 AGR 5 5 5 15

H8 APG-73 AGR 5 5 5 15

H8 APG-73 AGR 5 5 5 15

H8 APG-73 DTED 5 5 5 15

H8 APG-73 DTED 5 5 5 15

H8 APG-73 DTED 5 5 5 15

H8 AESA AGR 5 5 5 15



H8 AESA DTED 5 5 5 15



total runs 90 90 90

sorties 18 18 18

rounds per sorties 250 250 250

total rounds 4500 4500 4500

Run 1/2 AGR and 1/2 DTED -> 12 runs each way -> stat sig both ways

∑ = 54 sorties?

Config:

A

B

C


Y = A (ammo) + B (BAAT) + RS + A·B + A·RS + B·RS

RS -Radar/SW

B-B

AA

T

80 Runs = 10 sorties


Statapult = DOE

Boomer can explain?


Principles

Randomization

Replication

Blocking

Orthogonality





Y = A (ammo) + B (BAAT) + RS + A·B + A·RS + B·RS

B-B

AA

T

RS-Radar/SW

54 Sorties 10 Sorties 6 Sorties!

95% Confidence 80% Power


winds

temperature

pressure

pilot

aircraft

cannon

ammunition lot

slant range

dive angle

airspeed NAVAIR public release SPR-2013-303 26

winds

temperature

pressure

pilot

aircraft

cannon

ammunition lot

slant range

dive angle

airspeed

Measure

Standardize


Ammo

Profile

Data requirements

Hits

Aim Point

Range

Bullet Count

Wind


Combat

M56 High explosive incendiary (HEI)

PGU-28 Semi-armor piercing high explosive incendiary (SAPHEI)

Training

M55

PGU-27


//upload.wikimedia.org/wikipedia/commons/3/31/AC-130A_20MM_Vulcan_Cannon_Ammo_belt.jpg



Hits

Aim Point


IRSSS is an acoustic-based scoring system for supersonic projectiles

System consists of:

Microphone array in front of the strafing target(s)

Downrange equipment rack hardwired to the target microphones

Outdoor-mounted weather station adjacent to the downrange rack

Scoring console remote from the range


• Mach Angle = sin-1(c / Vp)

• Lateral Velocity VL = Vp * tan() = c / cos()

c

Vp

VL


0

5

10

15

20

25

30

He

ig

ht A

bo

ve

T

ra

ns

du

ce

rs

(ft)

-20 -15 -10 -5 0 5 10 15 20 Dist. From Center of Transducers (ft)

T1 T2 T3

T1-T2 T2-T3 T1-T3

Projectile Passing Thru Point 2

Point 2

(-12.5, 12 .99)








Air Force Solution

Marine Solution




Operational Significant

Operational Significant

Operational Significance

Operational Significance


NAVAIR public release SPR-2013-303 Analyze data between flights

47

Instrumentation

SW Tools

Measuring hits

Measuring aim point

Stats – Design Expert

Results



50 NAVAIR public release SPR-2013-303





55

significant

significant

significant

not significant


RS

Op

erat

ion

al S

ign

ific

ance

NAVAIR public release SPR-2013-303 56 Statistical Significance ≠ Operational Significance


Op

erat

ion

al S

ign

ific

ance

significant

57

Op

erat

ion

al

Sig

nif

ican

ce

significant



Pointed Travelling

59


Boeing explained wind compensation

Software modification in progress

H12 SCS around 2014 release

Procedural / Tactical options based on insight

Weapons Schools


Design of Experiments ≠ Test Methodology

See the target

Extracting HUD video data

Analysis data between flights

Gun Malfunction

Target Visibility

Winds

Statistical Significance may ≠ Operational

Significance

Statistical Significance = Defensible Results




Maj Zach “Libi” McCarley, USMC [email protected] [email protected] LtCol Tim “Boomer” Jorris, USAF [email protected] [email protected]

Documents

Maj Zach “Libi” McCarley, USMC VX-31, NAWS China Lake … Conference... · Maj Zach “Libi” McCarley, USMC VX-31, NAWS China Lake ... Is it Super Hornet wide or restricted