_eyland's 3D fairing
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'LAND is launching a range lerodynamic equipment ch, it is claimed, can reduce consumption by as much as oer cent.
itially offered for Roadtrain iels, the roof fairing and unbumper air dam have been Igned by Leyland and will be )ufactured by Windfall of folk.
,yland says that the roof ng alone should cut fuel conlotion by over 10 per cent on )m (13ft 1in)-high boxvan in wind condition.
le under-bumper air dam Jld also produce a saving of or three per cent in con juncwith the roof deflector.
:yland wind tunnel research ' November '13, 1982) found the flared three-dimensional actor to be more efficient than the conventional flat-blade type.
Against this must be set the fixed nature of the guttermounted deflector, which cannot be folded flat for entering the workshop. Leyland claims that although the flat deflector is quite efficient in direct head winds it is not so effective in side winds as the air stream gets behind the panel.
In addition to the standard hardware, Leyland is offering a consultancy service for operators through Multipart outlets.
Leyland suggests that in some circumstances further fuel savings may be possible using additional aids such as gap seals between the cab and the trailer.
Other devices being evaluated may also be added to the range.
The roof fairing costs £245 and the air dam £125. Both are available through Leyland and Multipart sales outlets.