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An advanced weapon and space systems company
1APPROVED FOR PUBLIC RELEASE OSR# 08-S-1194
LW30mm (30 x 113mm) Spotter Charge Prototype
2008 NDIA
42nd Annual Armament Systems:
Gun & Missile Systems Conference & Exhibition
21 24 Apri l 2008
New Orleans, LA
Jim RothDesign EngineerMedium Caliber AmmunitionATK Medium Caliber SystemsPhone: 763-712-7722Email: [email protected]
Contact info:
Curtis FieldingATK Launch SystemsPEP, Research and DevelopmentPhone: 435-863-6188Email: [email protected]
Fred StecherATK Advanced WeaponsWarheadsPhone: 763- 744-5117Email: [email protected]
Dan NielsonATK Launch SystemsOrdnance&EnergeticsPhone: 435-863-6687Email: [email protected]
APPROVED FOR PUBLIC RELEASE OSR# 08-S-1194
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Background and Need
Technical Approach
ATK Testing
Testing at Ft. Rucker
Acknowledgements/Contacts
Questions & Answers
LW30mm Spotter Charge - Outline
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LW30 Ammunition 30mm X 113mm
M789 HEDP
High Explosive Dual Purpose
M788 TP
Training Projectile matched to M789
Length (max): 113 mmWeight: 343 gProjectile Mass: 234 g
Muzzle Velocity: 805 m/sMax Range: ~ 3000 mDispersion: 1.35 mils
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30mm M230 Chain Gun Automatic Cannon
Caliber: 30mm X 113mm - LW30 Linkless
Max Range: ~ 4000 meters
Rate of Fire: 625 25 Shots per Minute
Platforms:
AH-64 / AH64A Apache Attack Helicopters
MH-60 Variants - SOAR
Targets:
Light Armored Vehicles
Deployed Infantry
M230 Weapon System
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An advanced weapon and space systems company
6APPROVED FOR PUBLIC RELEASE OSR# 08-S-1194
LW30mm Spotter Charge IRD Schedule Challenge
Phase 1 Preliminary
Design(Test 2457)
Phase 2 DetailedDesign
(Test 2465)
Phase 3
Build and Test(Ft. Rucker Demo)
Approx. 8 month schedule from Concept Definition to Govt Demo
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An advanced weapon and space systems company
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LW30 Spotter Charge ATK Team
ATK Medium
Caliber Systems(Ammunition & Gun
Design, Chem/Met Lab)
ATK Launch
Systems(Spotter Material /
Candidate Selection)
ATPG(Load, Test and
Evaluation)
ATK Advanced
Weapons(CTH modeling,ANSYS, Rapid
Prototype)
LW30 Spotter
ChargeDevelopment
Ammunition
Systems
Radford(Cartridge Hardware)
ATK Tactical
Propulsion and
Controls (ABL)
(Projectile Hardware)
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Spotter Charge Design Challenges
M788 TP Projectile Velocity vs. Range
0
100
200
300
400
500
600
700
800
900
0 500 1000 1500 2000 2500 3000 3500Range (m)
Velocity
(m/s)
Solid AL NoseSteel Body
Marking Material
Hollow AL Nose
Potential Spotter Fill
Potential Spotter Fill
Short-rangedemonstration 05
Desired range for demonstration
Impact velocity and target media are key parameters for Spotter Design
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Material Selection Approach
Technical:
Approach driven by the desired capabilityrequirements
Key challenges: Spotter material sensitivity
against soft ground target and reaction againstplywood
Schedule
Off the shelf material currently in use at ATK-LS
Castable material due to time constraints of loadtooling and integration with projectile geometrychanges
Selection
Identified 3 initial material candidates to beevaluated in ballistic capability testing
Down selected to most viable materials forhighest probability of success on target media
ID Description
X-9 Magnesium powder
Strontium Nitrate (Red
marker)
ATK-LS proprietary binder
X-5 ATK-LS proprietary Flareformulation
Potassium perchlorate
X-8 Magnesium powder
Sodium Nitrate (Whitemarker)
ATK-LS proprietary binder
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Spotter Charge Projectile Assy Configurations Phase 1
M759 Ogive
M759 Probe
Cap
M789 BodyCastable spotter material
-101 , -102, -103
Base Plug
Spotter Material in Projectile Body & Nose Assembly
Spotter Material in & Nose only
To address the aggressive
schedule for demonstration,
existing M788 or M789 projectile
hardware will be used or altered
to accommodate spotter material
cast loading.
As-mixed
Dispensing guninto Projectiles
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PRODAS Modeling for Ballistic Match to M788/M789
Baseline M789 Model in PRODAS Library
Baseline M788 Model in PRODAS Library
Initial LW30 Spotter Charge Model
Projectile Assy (grams) -Measured - All Samples Config 1 and Config 2
LW30 Spotter Charge Demonstration Projectile Build
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Serial Number
Mass(grams)
Spotter ChargePrototype Projectile
Mass~222 grams
M788 / M789 ProjectileMass 234 grams typical
PRODAS Trajectory Comparison for 1500m &3000m
1500m: QE 31.4 Gunners Mils
3000m: QE 148.8 Gunners Mils
Muzzle Velocity 805 m/sec for all projectiles
0
50
100
150
200
250
300
0 500 1000 1500 2000 2500 3000
Range (m)
Altitude(m)
M788 TP Baseline
Design 4 LW30 Spotter DL-Q219
M788 TP Baseline (Muz Vel 805m/sec)
Design 4 LW30 Spotter DL-Q219 (MuzVel 805 m/sec)
Trajectory at 3000m short for same QE and 805m/s muzzle velocity; increase MV to attain
match for spotter to 3000m
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An advanced weapon and space systems company
12APPROVED FOR PUBLIC RELEASE OSR# 08-S-1194
PRODAS Trajectory Comparison for 1500m - QE 31.4 Gunners MilsMuzzle Velocity 805 m/sec
Muzzle Velocity 833 m/sec for match to 1500 for Design 4 (~220 gram projectile)
0
5
10
15
20
25
30
35
40
0 100 200 300 400 500 600 700 800 900 1000 1100 1200 1300 1400 1500
Range (m)
Altitude
(m)
M788 TP Baseline (MuzVel 805 m/sec)
Design 4 LW30 SpotterDL-Q219 (Muz Vel 805m/sec)
Design 4 LW30 SpotterDL-Q219 (Muz Vel833m/s)
Ballistic Match PRODAS Trajectory Plots for 1500m
M788 at Standard
temp conditions,QE#1
For same QE set for M788,trajectory of spotter if targetingsame muzzle velocity
Spotter at Standardtemp conditions,
sameQE#1,increasedMuzzle Velocity
PRODAS modeling used to establish muzzlevelocity needed to attain match to 1500mand 3000m.
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An advanced weapon and space systems company
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ANSYS Stress Analysis for Ogive
Von MisesStress (psi)
Max. PrincipalStress (psi)
Max. ShearStress (psi)
Plastic Equiv.StrainC
L
InitialGeometry Ogive wall thickness will survive gun launch loads
Ground Impact Trajectory Plots
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14APPROVED FOR PUBLIC RELEASE OSR# 08-S-1194
Ground Impact Trajectory Plots1500m / 2000m / 3000m Gun at 0 vs. Altitude
Firing at Ground Elevation(Ft. Rucker Demo)
Firing fromAltitude
PRODAS Output for M788 TP
Angle of impact at
3000m similar forboth ground and
altitude firingscenarios
1500m 3000mShallow Angle of impact at1500m for ground firing
CTH M d li f G d I t 1500
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CTH Modeling of Ground Impact 1500m
DRY CLAY
Time=3 sec Time=3sec
Time=40 sec
DRY CLAY
Time=40 sec
75 0 C
14.5 ksi
1500m test at Ft. Rucker fired from ground-mount will produce shallowangle of impact that will make it difficult to initiate spotter fill.
(ksi)
14.5
1.45
0.145
(ksi)
14.5
1.45
0.145
(ksi)14.5
1.45
0.145
(ksi)14.5
1.45
0.145
PyrophoricfillCase
CTH M d li f G d I t 3000
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CTH Modeling of Ground Impact 3000m
Time=3 usec
Time=120 usec
Pressure Fringes
Temperature Fringes
Time=3 usec
Time=120 usec
Increased angle of impact at 3000m may provide increased shear orthermal stress upon impact; however the impact velocity is reduced
DRY CLAY
(ksi)14.5
1.45
0.145
(ksi)14.5
1.45
0.145
(ksi)
14.5
1.45
0.145
(ksi)
14.5
1.45
0.145
1800
C
Pyrophoricfill
Case
2000 T t R t ATPG
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17APPROVED FOR PUBLIC RELEASE OSR# 08-S-1194
2000m Test Range at ATPG
500 m
2000 m
2000m
Gun Pad
Target Area
Aerial ViewSource: Google Earth
View from high-speed camerato target
ATPG Test Setup Photos Gun to Target
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18APPROVED FOR PUBLIC RELEASE OSR# 08-S-1194
ATPG Test Setup Photos Gun to Target
500m Gun Firing Position Viewpoint
2000m Observation Viewpoint
Target
LW30mm Spotter Charge IR&D
M788 TP Drift vs. Range - PRODAS Eval for Cross-Wind
Firing at 2000m vs 16' wide RHA plate
-12-10
-8-6
-4-202468
10121416182022242628303234363840424446485052545658606264666870
0 200 400 600 800 1000 1200 1400 1600 1800 2000
Range (m)
Drift(ft)
0 cross-wind-10mph cross-wind
-5mph cross-wind
-3mph cross-wind
+3mph cross-wind
+5mph cross-wind
PRODAS Modeling for cross-winds showed risk
for missing test target at 2000m; thereforeconducted initial capability testing at 500m
ATPG Hi h S d Vid 500 t ti i t t l t t
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ATPG High Speed Video 500m testing against steel target
Serial Number: 2-101-1Material:X5Projectile Config: Nose only9/4/07 (Frame 100)
Serial Number: n/aHEDP baseline/ CartLot NRE07B001S9089/4/07 (Frame 150)
Serial Number: 2-102-1Material:X-8Projectile Config: Nose only9/4/07 (Frame 140)
Serial Number: 2-103-1Material:X-9Projectile Config: Nose only9/4/07 (Frame 50)
ATPG High Speed Video 500m testing against steel target
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An advanced weapon and space systems company
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ATPG High Speed Video - 500m testing against steel target
Serial Number: n/aHEDP baseline/ CartLot NRE07B001S9089/4/07 (Frame 150)
Serial Number: 2-103-2Material:X-9Projectile Config: Nose only9/4/07 (Frame 55)
Serial Number: 6-103-1
Material:X-9Projectile Config: Nose&Body9/5/07 (Frame 420)
Serial Number: 6-103-2
Material:X-9Projectile Config: Nose&Body9/5/07 (Frame 200)
ATPG High Speed Video - 500m testing vs plywood target
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ATPG High Speed Video - 500m testing vs. plywood target
These 2 tests were conducted at 500m with full propellant load andshow reaction on plywood in high-speed video, but not visible to unaided
eye at gun (500m).
When fired at 500m with 40% propellant load (simulating 1500m impact)there was no reaction seen on high speed video.
Demonstration Test Plan Example of 27-Round test block
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Demonstration Test Plan Example of 27-Round test block
Day or
Night
Firing
Distance
Viewing
Distance
Apache Gunner
View
Apache Pilot
View TargetConfig 1 Config 2
Day 1 Day 1500m 1500m Unaided Unaided Steel X
Day 1 Day 1500m 1500m Unaided Unaided Steel X
Day 1 Day 1500m 1500m Unaided Unaided Steel X
Day 1 Day 1500m 1500m Day TV PNVS FLIR Steel X
Day 1 Day 1500m 1500m Day TV PNVS FLIR Steel X
Day 1 Day 1500m 1500m Day TV PNVS FLIR Steel X
Day 1 Day 1500m 1500m TADS FLIR Unaided Steel XDay 1 Day 1500m 1500m TADS FLIR Unaided Steel X
Day 1 Day 1500m 1500m TADS FLIR Unaided Steel X
Day 1 Day 1500m 1500m Unaided Unaided Plywood X
Day 1 Day 1500m 1500m Unaided Unaided Plywood X
Day 1 Day 1500m 1500m Unaided Unaided Plywood X
Day 1 Day 1500m 1500m Day TV PNVS FLIR Plywood X
Day 1 Day 1500m 1500m Day TV PNVS FLIR Plywood X
Day 1 Day 1500m 1500m Day TV PNVS FLIR Plywood X
Day 1 Day 1500m 1500m TADS FLIR Unaided Plywood X
Day 1 Day 1500m 1500m TADS FLIR Unaided Plywood X
Day 1 Day 1500m 1500m TADS FLIR Unaided Plywood X
Day 1 Day 1500m 1500m Unaided Unaided Earth X
Day 1 Day 1500m 1500m Unaided Unaided Earth X
Day 1 Day 1500m 1500m Unaided Unaided Earth X
Day 1 Day 1500m 1500m Day TV PNVS FLIR Earth X
Day 1 Day 1500m 1500m Day TV PNVS FLIR Earth X
Day 1 Day 1500m 1500m Day TV PNVS FLIR Earth X
Day 1 Day 1500m 1500m TADS FLIR Unaided Earth X
Day 1 Day 1500m 1500m TADS FLIR Unaided Earth XDay 1 Day 1500m 1500m TADS FLIR Unaided Earth X
ATK Projectile Config
3 TargetTypes
Day &Night
firing
3 viewingscenarios
1500 & 3000mviewing range
1500 & 3000mfiring range
Total of 170 cartr idges shipped for Demo
LW30 Spotter Charge - Ft Rucker Demonstration Test Setup
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An advanced weapon and space systems company
23APPROVED FOR PUBLIC RELEASE OSR# 08-S-1194
LW30 Spotter Charge Ft. Rucker Demonstration Test Setup
Source: Google Earth
3000m
3000m
Target
Area
1500m
1500m
TargetArea
Fixed
Gun Pad
Location
Apache
viewingControltower
ATK M230 LF Gun / ROI Raven system used at Ft. Rucker
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An advanced weapon and space systems company
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ATK M230 LF Gun / ROI Raven system used at Ft. Rucker
3000m target
1500m target
Recon Optical's RAVEN R-400
is used for common remotelyoperated weapon station(CROWS) program.
Example of Steel Impact Day and Night Testing
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Example of Steel Impact Day and Night Testing
Camera #54
Day Testing
Camera #54
Night Testing
Summary
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Summary
A prototype spotter charge for the 30x113mm LW30mm Ammunition family was
evaluated against multiple target media and ranges of trajectory
Modeling tools were used for analysis of mass properties, aeroballistic performance,stress analysis and impact thermal stress.
PRODAS modeling provided ballistic match that was verified with radar tracking in ATK
test. CTH hydrocode modeling indicated that predicted reaction of spotter material on ground
impact would be marginal depending on impact angle and velocity.
ANSYS stress analysis modeling provided design safety that was verified in structuralintegrity ballistic tests.
Demonstration testing conducted at Ft. Rucker tracked with the results from ATKtesting:
Reliable visible reaction when impacting Steel target, day and night at 1500m, and night at 3000m. Dayimpact at 3000 not available.
Impact on Plywood target showed delay reaction behind target; at times was evident and scored by pilotas sufficiently visible allowing for adjustment. More evident at night.
Limited frequency / Marginal short duration visible day / night when impacting ground at 1500m.
3000m testing did not reliably impact visible target area due to drift from cross winds (PRODAS)
Further development efforts on hold pending government evaluation of thedemonstration testing and updated User need assessment.
Acknowledgements
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27APPROVED FOR PUBLIC RELEASE OSR# 08-S-1194
Acknowledgements
OPM-MASMaj. Glenn Dean
Bill Wong
Scott Bryan
ARDEC
John Hirlinger
Jeff Darbig
Rich Schrum
Anthony CorteseDameon Gabriel
Ft. Rucker
Maj. Kevin BeldenBob Smithson
Joe Webers
CW3 Patrick Backmann
ATK MCS Design
Larry DoumaJim Lamb
Linda Heuer
Gary Wittmer
Don GloudeVince Martinez
Recon OpticalDoug Hagie
ATK ATPG LAP
John KraljicDennis Martinson
Scott Larson
Rich Johnson
Clayton Weitnauer
John KraljicTony Teale
Sandy Ohotto
George Berning
Eric Severson
ATK ATPG Test
Bret George
Dave Steffenhagen
Don Newman
Jim Raivala
Cary Whetstone
Tom Lorentz
Joe Lamon
Mike Cypher
ATK MCS Programs / BDScott Teigen
Rodney Ward
Butch Nery
Chris Stewart
Ellis Clark
Matt Berg
ATK LSCurtis Fielding
Dan Nielson
Rick Tanner
Steve Glaittli
ATK AW
Fred StecherWayne Hierlmaier
Mark Krueger
Dave Fehr
ATK ABL
Dave Starr
Annette Staggs
ATK AW
Dave Geiss
Dave Darden