feg conference penrith colin jt mackenzie bsc bsc(eng) ceng mice fiht project consultant to the...
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FEG Conference PenrithColin JT Mackenzie BSc BSc(Eng) CEng MICE
FIHTProject Consultant to the Highland Timber Transport Group
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Structure of PresentationIntroductionThe rise of the Super SingleRoad Friendly VehiclesThe Crystal Ball
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Introduction: What is the Problem?
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The rise of the Super SingleTwin wheels Super SinglesCOST 334: Super Singles superior
inSafetyRunning costsEnvironment
BUTHighly damaging to fragile local
roads - x7!23/10/2007 Colin JT Mackenzie 4
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Road Friendly VehiclesKey issue: How do we make
timber trucks less damaging to roads?
Make tyre footprint as big as possibleIncrease tyre widthLower the tyre pressureUse multiple wheels
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Tyre Footprint
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The John Scott LGP system5 years development by
JSTTwo basic systems:Case 4x4 tractor plus
trailer(s)Volvo 6x6 plus trailerDifferent systems,
different uses
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Rear SuspensionsBalance beamCase: McCauley
And multi wheelVolvo: King
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Volvo•80t Gross 45t load
•Off public road
•Red Diesel Economy
•Best for deep forest
high volume haulage
to transhipment point
•Best with exclusive
use of road
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Case•32t Gross 15t+ Load
•Can cope with poor roads
•On and off public road
•Good for short hauls
outside forest but no crane
•Well suited to ‘all in’
roading and haulage
contract
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Central Tyre Inflation (CTI)Onboard computer
controls tyre pressure
Lower speed, lower pressure, greater traction
Excellent feedback. ROADEX report in November
4+ units now in use in Scotland
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Super Super Singles•Wider, lower profile tyre•Bigger footprint•As good as twin wheels?
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Situation
Conventional (super single artic)
Specialist (twin wheel or SSS &CTI equipped)
Tractor +LGP trailer (15t payload)
Specialist LGP (45t payload)
Served by agreed route (and short distance in forest)
Served by weak consultation route (and short distance in forest)
Hauling to nearby transfer stockpile
Short/medium in-forest haul to stockpile (0-20km round trip)
Long in-forest haul to stockpile (10km+ round trip)
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The Crystal BallRoad friendly vehiclesSharing of dataA more holistic approach to
transport procurement
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