Lynx streamlines semis...
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• Lynx Express Delivery Network is about to start aerodynamic artic bodywork trials which could lead to fuel savings of more than 10%.
The NFC express parcels subsidiary has already produced the first of four prototype aerodynamic semi-trailers which will initially be used with two different tractive units—an ERF E8.275 and a Leyland Daf 80.300, both fitted with the respective manufacturer's deflector and side collars.
The first stage will monitor the fuel consumption of the "standard" tractors and aero trailers as they run between Lynx's Leyland depot and engineering centre and possibly the Ipswich parcels depot.
After that national fleet manager David Mitchell will look at the effects of adding extra fair ings between the axles of the tractors, although he stresses that "we're not going to go overboard on the tractor".
The first prototype aero trailer is based on one of the company's existing 12.2m tandem-axle box trailers with a Wheelbase chassis and a Cargovan body, developed in conjunction with Lynx. It has heavily radiused leading edges and an unusual 50mm taper at the top of each side wall.
The sidewall taper, originally specified by Mitchell to reduce accident damage, has already led to fuel savings of 0.5mpg as the trailer walls no longer extend beyond the sides of the Lynx tractors, allowing smoother air flow.
Lynx's own GRP side fairings and wheelarches are fastened to the trailer's sideguards and
special rub rail. The final prototype design will also have a valance behind the trailer's rear axle which will taper inwards to the rear opening—similar to the rear valances on the Cartwright aerodynamic trailers developed for TNT (CM 20-26 June and below).
In addition to the obvious environmental advantages of lower fuel consumption and reduced spray, there is also a cosmetic benefit, says Mitchell.
Fuel consumption will be gauged by tank-top-to-tank-top measurements—the same as CM roadtests. Mitchell says: "If we could get another lmpg we would be making a significant saving."
Lynx's artics are currently averaging around 34.5-33.2k/100km (8.2-8.8mpg) running at 24 tonnes. It has 230 tractors and 840 trailers in its fleet.
"If we get the kind of savings we're looking for over our total tractor mileage of 22.08m we're talking about saving 292,682 gallons which would knock £439,023 off our annual fuel bill," says Mitchell.
The express carrier already has extensive experience of aerodynamic bodywork; it developed its own vehicle body kit for its 7.5-tonne delivery vehicles in conjunction with Windfall.