Evaluation of Aardvark Mk IV Flail - gichd

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5 Trials Methodology 5.1 General Page 6 of 77 The trial was carried out and managed by the Countermine Warfare team from DERA Chertsey. Details can be found in the Trial Plan, Ref: DERA/LSAA1/CMW8/13/03/01/01 Results and observations were recorded daily and supported by still photography and video recordings. 5.1.1 Performance, Mobility and Transportability This included measuring of major dimensions, handling and mobility of the machine, safety, followed by encountering mines in an inert minefield. 5.1.2 Survivability 5.2 Sites There were no survivability tests carried out in this set of trials . The site used for this trial was DERA Bagshot. 5.2.1 DERA Bagshot The DERA Bagshot test track is split into three sections: Rough Road Course This is a 3.7 mile rough road course suitable for wheeled vehicles of all sizes (including loaded tank transporters). ‘Rough Road’ indicates a graded, compacted surface of flintstones (up to 6 inches in diameter) with a clay and sand binding. With use the road becomes rutted and covered in potholes and this combination provides a very severe test for suspension systems and tyres. Alpine Course This is a narrower, steeper (up to 1-in-2.7 gradients) 3.5 mile circuit constructed with the same mixture of flint, sand and clay. Cross Country Area There is a central Cross-Country driving area, approximately 1 km square, consisting of sand and mud between heather and small trees. This area was not used for the trial. 5.3 Procedures 5.3.1 The trial was conducted using a range of test lanes and slopes available to measure performance. 5.3.2 The inert minefield encounter used inert model AT mines as targets. These were laid to a specific pattern and depth for each test run. 5.3.3 Details of the test procedures and results are shown in the following pages. DERA/LWS/LSAA/TRD000603/1.2
6 Test Procedures and Results 6.1 General 6.1.1 For the purposes of the trial the ‘cab’ end of Aardvark will be defined as the front and the flail end will be defined as the rear of the vehicle, i.e. the machine flails minefields in reverse. (See Fig 3.1) 6.1.2 Test procedure and performance sheets were issued for each performance and test. These test performance sheets have been published separately and are available from DERA. A summary of the tests is shown in Table 6.1. The description, summary of results and comments/observations of each test are detailed on the following pages. 6.2 Results Test Description Test No. Weight & General Dimensions a) Wheelbase A1/1 b) Approach Angle A1/1 c) General Dimensions A1/1 d) Axle Weights A1/1 Handling & Mobility a) Turning Circle A2/1 b) Slopes A3/1 c) Flailing Depths A4/1 d) Obstacles A5/1 e) Rough Terrain A6/1+2 Inert Minefield Encounter A7/1 - 9 Table 6-1; Summary of Tests The results will be presented in order of category and not necessarily in chronological order. The catagories are; Transportability, Handling & Mobility and Performance. DERA/LWS/LSAA/TRD000603/1.2 Page 7 of 77
Page 1 and 2: Evaluation of Aardvark Mk IV Flail
Page 3 and 4: Authorisation Prepared by Mr C A Le
Page 5 and 6: Abstract Aardvark Clearmine Ltd hav
Page 7 and 8: List of contents Authorisation iii
Page 9 and 10: List of Tables Table 4-1; Improveme
Page 11 and 12: Figure 6-45; Aardvark just passed R
Page 13 and 14: 1 Introduction 1.1 Contractual Matt
Page 15 and 16: Rear Front Figure 3-1; Aardvark Mar
Page 17: 4.1 Additional Alterations: 4.1.1 T
Page 21 and 22: Figure 6-2; Measuring the height of
Page 23 and 24: Figure 6-3; Using load cells to wei
Page 25 and 26: Figure 6-4; Measuring the Approach
Page 27 and 28: Figure 6-6; Turning Circle DERA/LWS
Page 29 and 30: Figure 6-7; Aardvark climbing Birch
Page 31 and 32: Figure 6-9; Speed = 67m/hr, Depth =
Page 33 and 34: Figure 6-13; After flailing at 300m
Page 35 and 36: Figure 6-17; Measuring Level used D
Page 37 and 38: Figure 6-18; Aardvark entering the
Page 39 and 40: Figure 6-20; Foliage and terrain en
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Page 43 and 44: Figure 6-24; Test run before cleara
Page 47 and 48: Destroyed Mine Case Figure 6-28; La
Page 49 and 50: GIAT buried in spoil Figure 6-32; P
Page 51 and 52: Destroyed Mine Case Figure 6-34; La
Page 55 and 56: Figure 6-39; Layout of 3 Figure 6-4
Page 59 and 60: Figure 6-44; Layout of Run 4 Figure
Page 61 and 62: Run stopped before these mines Figu
Page 65 and 66: Figure 6-52; Layout of Run 6 Figure
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Figure 6-57; Layout of Run 7 Figure
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Figure 6-60; TMRP-6 and TMA-2 Figur
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een destroyed or detonated. . The G
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Figure 6-66; TMA-3 outside flail wi
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6.5.9 Inert Minefield Encounter (A7
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Figure 6-70; Run 9 after flailing F
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6.5.10 Running Costs and Ease of Ma
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8 Recommendations 8.1 The driver’
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A MK III AND MK IV RELATED PERFORMA
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Interval Servicing Task DERA/LWS/LS
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Distribution list Ms A Doherty DFID
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