Power & Mobility COMPOSITE RUBBER TRACK TRIAL RESULTS FOR WARRIOR IVF Tommy Marcotte Defense Engineering Director Soucy International
Power & Mobility INTRODUCTION • Armoured Trials and Development Unit (ATDU) conducted a private venture trial on behalf of Soucy Defense , sponsored by the Head of Capability – Ground Manoeuvre. • Trial aim: build United Kingdom Ministry of Defense (UK MoD) confidence in Composite Rubber Track (CRT) technology by validating performance claims, in order to inform future Armoured Vehicle Programme (APV) capability decision. • Objective: Trial of 3107 miles (5,000 km), broken into 10 BFM of 311 miles each.
Power & Mobility WARRIOR IFV Variant 510 60,000 lb
CRT TECHNOLOGY – BENEFITS ON WARRIOR FUEL ECONOMY RANGE WEIGHT 28% increased in range 37% reduction in 28% fuel track weight savings With CRT technology NOISE VIBRATION Mean noise With steel tracks Mean vibration reduction of 53% reduction of 40% DURABILITY Up to 5,000 miles MAINTENANCE Savings of 134 maintenance hours per 1000 miles
Power & Mobility WEIGHT REDUCTION
Power & Mobility WEIGHT REDUCTION Composite Rubber Track (CRT) Kit weight saving of 3.306 LB (- 5% GVW in average) When submerged in water, CRTs are 79% lighter than steel tracks
Power & Mobility ADTU TRIAL
Power & Mobility CRT INSTALLATION • The CRTs were removed and replaced by the crew in both the work shop and in the field. • It took the untrained team 2.5 hrs to complete the task by hand in both instances.
Power & Mobility 10 BATTLEFIELD MISSIONS 2 Months of intensive testing ( 80 miles / day): • 28 % on track • 42% on road • 30% Cross-country
Power & Mobility 3107 MILE TRIAL 2 Months of intensive testing ( 80 miles / day): • 28 % on track • 42% on road • 30% Cross-country
Power & Mobility 3107 MILE TRIAL 2 Months of intensive testing ( 80 miles / day): • 28 % on track • 42% on road • 30% Cross-country
Power & Mobility FUEL CONSUMPTION
Power & Mobility VEHICLE RANGE - ROAD Distance Travelled with One Fuel Tank Road Conditions 250 Fuel (Gallon) 200 Vehicle range 150 increase of 19% Steel Tracks on road 100 CRT 50 0 0 100 200 300 400 Distance (miles)
Power & Mobility VEHICLE RANGE – CROSS-COUNTRY Distance Travelled with One Fuel Tank Cross-country 250 Fuel (Gallon) 200 Vehicle range increase of 31% 150 Steel Tracks in cross country 100 CRT 50 0 0 50 100 150 200 250 300 350 Distance (miles)
Power & Mobility VEHICLE RANGE Assuming 25% road and 75% cross-country the CRT allowed the vehicle range increase from 260 mile to 332 mile (+ 28%)
Power & Mobility FUEL CONSUMPTION CRT Fuel Consumption VS Steel Track 30% % Reduction over Steel Track 25% 20% 15% -24% 10% -16% 5% 0% Road Cross-country
Power & Mobility FUEL CONSUMPTION – “Snake Effect” Low rolling resistance = low fuel consumption, thanks to: • Reduction of the rubber compound hysteresis • Reduction of the weight and inertia • Reduction of the “snake effect”
Power & Mobility NOISE REDUCTION
Power & Mobility NOISE REDUCTION Cross-country (Hatch closed) - Crewstation 110 108 Average 106 9dB(C) reduction of 104 10dB(C) 7.75dB(C) 102 dB(C) 100 CRT 98 9dB(C) Steel 96 94 3dB(C) 92 90 0 5 10 15 Vehicle Speed (mph) JSF2382 NPRIME Report
Power & Mobility NOISE REDUCTION Driver CRT Noise Reduction vs Steel Tracks SPL(C) Commander 80% Crewstation 70% 60% Average 50% reduction 40% 30% of 53% 20% 10% 0% Roading Roading Fast Track Fast Trak Cross Cross Overall (Open) (Closed) (Open) (Closed) country country (Open) (Closed) JSF2382 NPRIME Report
Power & Mobility VIBRATION REDUCTION
Power & Mobility VIBRATION REDUCTION Unweighted RMS - Rear Crew Seat Pad 3.5 Rubber Dec-17 3 Rubber Jan-18 Up to 75% Steel 2.5 Vibration Level (g) -75% vibration 2 reduction 1.5 at 31 mph 1 0.5 0 0 5 10 15 20 25 30 35 40 45 Vehicle Speed (mph) JSF2382 NPRIME Report
Power & Mobility VIBRATION REDUCTION Commander CRT Vibration Reduction vs Steel Tracks (g) Driver Gunner Rear Crew 70% Mean 60% reduction 50% 40% of 40% 30% 20% 10% 0% Roading Roading Fast Track Fast Trak Cross Cross Overall (Open) (Closed) (Open) (Closed) country country (Open) (Closed) JSF2382 NPRIME Report
Power & Mobility DURABILITY
Power & Mobility DURABILITY Mean Etimated Track Durability vs Gross Vehicle Weight Predicted Durability (Miles) 21" Wide x 4.1" Pitch Length 5000 4000 3000 2000 1000 0 30 31 32 33 34 35 36 37 38 Gross Vehicle Weight (US Tons)
Power & Mobility MOBILITY
Power & Mobility MOBILITY 120 Mobility Index & Vehicle Cone Index 100 CRT 80 Mobility TR30 Steel Track improved 60 by 24 % 40 20 0 Mobility Index Vehicle cone index (1) vehicle cone index (50) J.Y. Wong, Theory of Ground Vehicles
Power & Mobility GROUND PRESSURE * Cardinal Point Specification for the Track System for the Warrior Family of Armored Vehicles.
Power & Mobility MAINTENANCE
Power & Mobility CRT MAINTENANCE • CRT kit estimated mean durability of ~4000 miles: – Throughout the 3107 mile trial there have been no CRT components changed from the original parts fitted. • The current Warrior estimated steel tracks durability is 1000 miles – 883 miles (ref. BATUS - British Army Training Unit Suffield, Canada)
Power & Mobility CRT MAINTENANCE • “Daily maintenance procedures only require a visual inspection on running gear components.” • “The limited inspection saved 415 man hours for level 1 and 2 maintainers, over the 3107 miles performed.”
Power & Mobility ATDU FEEDBACK
Power & Mobility ATDU - FEEDBACK • “ When the Driver put in a steering demand at any speed the vehicle responded immediately.” • “It was apparent that the acceleration was much quicker compared with steel tracks.” • “ The vehicle stopped more sharply.” ATDU/040236 – COMPOSITE RUBBER TRACK TRIAL
Power & Mobility ATDU - FEEDBACK • “There is a noticeable difference between the CRT and the steel tracks noting that there were no physical feelings of vibration and the only noise heard is that of the engine at all speeds over varying terrains.” ATDU/040236 – COMPOSITE RUBBER TRACK TRIAL
Power & Mobility ATDU - FEEDBACK • “There is evidence that the Noise and Vibration produced by having CRT fitted is significantly reduced which will have a genuine effect on the health of our soldiers .” ATDU/040236 – COMPOSITE RUBBER TRACK TRIAL
Power & Mobility ATDU - FEEDBACK • “ The CRT trial has been extremely successful.” • “ The trial achieved the aim of completing 3,107 miles on one set of tracks.” • “ Having this track system deliver up to 5,000 miles is realistic.” ATDU/040236 – COMPOSITE RUBBER TRACK TRIAL
Power & Mobility ATDU - FEEDBACK • “Confidence in the CRT technology has thus grown significantly and the trial has identified several possible exploitation opportunities in the current and future UK AFV fleet.” ATDU/040236 – COMPOSITE RUBBER TRACK TRIAL
Power & Mobility Thanks to the ATDU Team
Power & Mobility QUESTIONS ?
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