Table 5. Driver's rating of test surface

Table 5. Driver's rating of test surface.

HEMTT M60A3 HEMTT M60A3 M60A3

Slip during

trail

slopes slopes corners

Problems with steering, track walking

w/sand

off sprockets after 10 passes (M60 on corners)

Traction loss and much breakage after 10 passes on

Material gets caught in tracks after 10 passes and

must be pulled out by hand (M60 on corners) (Fig. 12)

Material interference (worried about brake lines),

slipping, rough ride and poor vehicle handling after a

single pass (HEMTT on slopes)

Material interferes with tracks after 10 passes and

causes steering and handling problems after 50 passes

(M60 on slopes)

Tire chips

2.5

1

3

some

Good traction but steering problems after 25 passes

Enhanced by tire pressures (HEMTT on trail)

Good traction, smooth ride (HEMTT on slopes)

Steering problems after 10 passes, track walking off

sprockets (M60 on corners)

Geonet

1

1.5

3

some

Traction loss after 10 passes, bunched during braking

(M60 on slopes)

Good traction but fabric moves along slope (HEMTT

on slopes)

Control

5

4

Slipping and steering problems after 10 passes

(HEMTT on wooded trail)

Gravel

3

Gravel displaced by tracks, no cohesion (M60 on trail)

Polyrock

2

1.5

1

some

Good traction but fabric moves along slope (HEMTT

on slopes)

Trevira

1

w/gravel cover

Tire mats

2

3

1

4

HEMTT

Mats moved together after 25 passes because they

some

were not centered under tracks (M60A3 wooded trail)

M60 none

Material interfering with track after 10 passes,

removed because of severe interference after 25

passes, gradual corners will increase survivability,

anchoring mats may help (M60 on corners)

Rough ride, some handling problems after 10 passes

(HEMTT on slopes)

Fascine

1

2

UniMats

1

2

5

3

HEMTT

Traction and handling problems after a single pass

some

(HEMTT on slopes)

M60 lots

Traction loss and vehicle handling and steering

problems after 10 passes (M60 on slopes)

Control

1

Gravel

1

Rating:

1 = excellent, no problems

4 = difficult to traverse

2 = slowed down some, rough ride

5 = very difficult to traverse, got stuck

3 = some slipping, steering problems

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