john.macdougall@can.gd-ots · 08MK0512_JM NDIA Presentation.ppt (18).50 cal SRTA Ballistic...

© 2007 General Dynamics Ordnance and Tactical Systems-Canada inc.

National Defense Industrial Association Small Arms Symposium May 2008

.50 cal Short Range Training Ammunition

Author: John MacDougalljohn.macdougall@can.gd-ots.com

National Defense Industrial Association Small Arms Symposium May 2008

.50 cal Short Range Training Ammunition

Author: John MacDougalljohn.macdougall@can.gd-ots.com

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GD-OTS Canada New .50 cal SRTAGD-OTS Canada New .50 cal SRTA

Project Objectives

Current Training Ammunition Products/Projects

Concept

Performance– Simulations

– Test Data

Applications/Benefits

Summary

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Project ObjectivesProject Objectives

To develop an improve .50 cal SRTA – Eliminate need for weapon adaptors/ancillary equipment

– Increase effective ballistic match range

– Increase functioning reliability

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Current Product.50 cal Limited Range Training AmmunitionCurrent Product.50 cal Limited Range Training Ammunition

Non-toxic, 45g bullet with rear fins to limit range

Functions in M2HB and QCB machineguns

Ball and tracer versions in production since 2001

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Current Product.50 cal LRTACurrent Product.50 cal LRTA

Accuracy of 30 cm at 550 m range

Ballistic match up to 800 m with M33

LRTA = Max range of 3,500 m or 50% reduction vs. M33

Now in service in 3 NATO armies

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Current Product SHORT STOP® 7.62 mm SRTACurrent Product SHORT STOP® 7.62 mm SRTA

7.62 mm SHORT STOP® training round

Available in 4B/1T configuration

Now in Production for DoD as M973 & M974

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Current R&D ProjectSHORT STOP® 5.56 mm SRTACurrent R&D ProjectSHORT STOP® 5.56 mm SRTA

Ballistic match to 100 m with max range of 600 m

Under final development with ARDEC

Phase III recently awarded

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.50 cal SRTA Concept.50 cal SRTA Concept

The .50 cal SRTA Cartridge is:– Our newest Short Range Training Solution

– An Internally-funded GD-OTS Canada R&D program

– Now in test and evaluation phase

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.50 cal SRTA Concept.50 cal SRTA Concept

SRTA performance objectives:– No modifications of M2 machinegun

– Improved ballistic match with M33/M17

– Reliable functioning from –20 to +50ºC

– Non-toxic components

– Max range of 700 m

– Frangible projectileNo splashback beyond 25 m

– Improved performance vs. M858

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.50 cal SRTA Concept.50 cal SRTA Concept

The .50 cal SRTA has:– A monolithic, frangible projectile

– Forward fins with controlled spin technology to limit rangeFins introduce a "reverse" spin/drag, opposing rotation

The projectile quickly becomes dynamically unstable

– Very good accuracy due to consistent ballistic performanceYaw on target is trade-off for greatly reduced max range

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.50 cal SRTA Performance.50 cal SRTA Performance

SRTA performance Objectives/Results– Objective: ballistic match with ball round at 150 m

Result: > 200 m match range possible

– Objective: Drop of < 15 cm compared to ball at 150 mResults obtained: < 5 cm

– Objective: Mean radius Dispersion < 30 cm at 150 m Results obtained: < 15 cm

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.50cal SRTA vs. M858 Comparison .50cal SRTA vs. M858 Comparison

.50 cal M858 Ball and Tracer M860 training rounds– Type classified in 1983 and introduced in the US DoD

– Requires use of M3 Recoil Amplifier Barrel Assembly

– Muzzle velocity is approx. 4,000 feet per second.

– Plastic projectile mass is approx. 3.3 grams

– Ballistically comparable to M17/M33 out to 150 meters

– Maximum range of 700 meters

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.50 cal SRTA Ballistic Simulation.50 cal SRTA Ballistic Simulation

Comparison of ballistic drop with M858 at 150 m

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) 300250200150100500

2.0

1.5

1.0

0.5

0.0

Horizontal distance (m)

Ver

t. D

rop

(m)

.50cal SRTA

.50cal M33

Vertical Drop .50cal SRTA Vs .50cal M33

.50cal SRTA Ballistic Simulation.50cal SRTA Ballistic Simulation

Comparison of ballistic Drop vs. M33 Ball round

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.50 cal SRTA Ballistic Simulation.50 cal SRTA Ballistic Simulation

0

100

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0 1 2 3 4 5 6 7 8

VELO

CIT

Y (m

/sec

)

TIME (sec)

M33

SRTA

Velocity decay vs. M33 simulation with PRODAS

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5m 68m 185m

Shadowgraph images from DREV spark range

.50 cal SRTA Ballistic Testing .50 cal SRTA Ballistic Testing

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.50 cal SRTA Ballistic Testing.50 cal SRTA Ballistic Testing

Typical Drag vs. Velocity curve measured

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.50 cal SRTA Ballistic Simulation.50 cal SRTA Ballistic Simulation

Maximum range simulation with PRODAS– Less than 700 m

0

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-1000 500 1000 1500 2000 2500 3000 3500 4000 4500 5000 5500 6000

Z (m

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MAXIMUM RANGE (ELEVATION: 22.5°)MAXIMUM RANGE (ELEVATION: 22.5°)

X (m)juil 20,2007Prodas2000 V3 Arrow Tech Associates

.50CAL SRTA

.50CAL M33

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.50 cal SRTA Ballistic Testing.50 cal SRTA Ballistic Testing

Ballistic match and accuracy tests at 150 m, June 2007– Reference is M33

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.50 cal SRTA Ballistic Testing.50 cal SRTA Ballistic Testing

Frangibility testing at 50 m range– No penetration of a 10 mm armor plate

– No splashback at 25 m after 30 shots fired

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.50 cal SRTA Ballistic Testing.50 cal SRTA Ballistic Testing

Minimal barrel fouling in M2 barrel observed

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.50 cal SRTA Applications/Benefits.50 cal SRTA Applications/Benefits

Training Applications/Benefits– Maritime training with limited surface danger-zones

– Used on reduced safety template ranges

– Training with reactive steel targets

– Fired on “Lead-free” ranges

– Enables engagements with targets on 2nd and 3rd floor windows or on overpasses

– Reduces friction created by units competing for range time

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.50 cal SRTA Applications/Benefits.50 cal SRTA Applications/Benefits

March-April 2008 edition of Infantry Magazine– Article entitled: “SRTA allows 360° Training Capability”

– At Fort Riley, Kansas: “SRTA is 1st Division's means to produce one awesome, realistic and simple training event.”

– “Only SRTA can provide free-thinking using fire and maneuverin a 360° training environment because of the SDZ”

– “SRTA allows trainers to condense the battlespace”

– “SRTA ranges can be created from maneuver spaces”

– Because of the increases in land resources the training tempo has increased.”

– “Without SRTA, the 1st Division and the U.S. Army transition team trainers would face significant and difficult obstacles”

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MSR

7.62mm Ball

5.56mm,7.62mm & 12.7mm SRTA

SP

FP

Convoy

5.56mm CQT®

& 40mm DragonFly™

Applications/Benefits

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SUMMARY– The new .50 cal SRTA lead free, frangible concept represents

an advance in small arms training technology

– The new .50 cal SRTA is currently an in-house R&D project

– It optimizes the use of range training resources due to its significantly reduced danger-template

– This new product will further enhance the family of: Short Range Training Solutions offered by GD-OTS Canada

.50cal SRTA Summary .50cal SRTA Summary

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John MacDougall: Business Development Manager

Telephone: 1-514-582-6226

E-mail: john.macdougall@can.gd-ots.com

Contact InformationContact Information

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.50 cal SRTA Ballistic Testing.50 cal SRTA Ballistic Testing

Weapon cycling video