Legal Brief
Cartwright Lets Cheetah Loose
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TNT have unleashed 86 Cartwright Cheetah Aerodynamic trailer systems into their fleet.
Cartwright developed the Cheetah Aero System in conjunction with TNT Express, The Department of Energy and the Transport Research Laboratory.
Through extensive trials over 12 months with trailer and tractor, the system led to fuel savings of 16% - with a 13 tonne reduction in annual carbon emissions based on 124,000 miles per annum.
The Cheetah’s cab roof fairing, cab extensions, trailer skirts and rear roof scoop, were wind tunnel tested. They showed a 42% total reduction in drag coefficient.
TNT has been so impressed by the Cheetah Aero System that it has taken delivery of 86 13.6 metre GRP van trailers that feature it and plan further orders for 2008.
TNT’s National Engineering Manager Steve Davis said: “We have found that this Aero System will play a huge role in the future in reducing our carbon footprint and fuel consumption – and that is something backed up by the official Department of Energy test trials.
“There are other trailers on the market but Cartwright aerodynamic system has proved it can save on carbon emissions and ultimately on fuel costs. That is why we have bought it.
Steven Cartwright, Director of The Cartwright Group, said that road trial tests and track tests at MIRA (Motor Industry Research Association) are booked with other customers eager to see what results the aerodynamic system will have on their own fleet. He added that the Cheetah would also be on show at this year’s CV Show.
The Cheetah features specially-designed cab roof fairing and side collars which work together with the trailer’s front aerodynamic aluminium blimp, aerodynamic rear roof scoop, a large radius skirt, tapered rear skirt quarter panels and a circular rear under-run bar and open rear chassis design. An additional key feature that enhances the TNT trailer, is the tapered body . Due to the nature of the load, Cartwright were able to taper the body from bottom to top inwards , enhancing the aerodynamic effect , in line with the cab aerodynamic components.
Steven Cartwright said: “All the components fitted were wind tunnel tested on scale models prior to final manufacture.
“Key areas were tested, such as the landing leg area and at the rear of the trailer, where we left the area open to allow for the air to pass under the chassis and out the rear of the trailer. This was proven to create less drag than enclosing the areas with aerodynamic panels.
“The Transport Research Laboratory ensured a third party monitored all road trial testing, and we are convinced it is the best system available today.’’
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Cartwright developed the Cheetah Aero System in conjunction with TNT Express, The Department of Energy and the Transport Research Laboratory.
Through extensive trials over 12 months with trailer and tractor, the system led to fuel savings of 16% - with a 13 tonne reduction in annual carbon emissions based on 124,000 miles per annum.
The Cheetah’s cab roof fairing, cab extensions, trailer skirts and rear roof scoop, were wind tunnel tested. They showed a 42% total reduction in drag coefficient.
TNT has been so impressed by the Cheetah Aero System that it has taken delivery of 86 13.6 metre GRP van trailers that feature it and plan further orders for 2008.
TNT’s National Engineering Manager Steve Davis said: “We have found that this Aero System will play a huge role in the future in reducing our carbon footprint and fuel consumption – and that is something backed up by the official Department of Energy test trials.
“There are other trailers on the market but Cartwright aerodynamic system has proved it can save on carbon emissions and ultimately on fuel costs. That is why we have bought it.
Steven Cartwright, Director of The Cartwright Group, said that road trial tests and track tests at MIRA (Motor Industry Research Association) are booked with other customers eager to see what results the aerodynamic system will have on their own fleet. He added that the Cheetah would also be on show at this year’s CV Show.
The Cheetah features specially-designed cab roof fairing and side collars which work together with the trailer’s front aerodynamic aluminium blimp, aerodynamic rear roof scoop, a large radius skirt, tapered rear skirt quarter panels and a circular rear under-run bar and open rear chassis design. An additional key feature that enhances the TNT trailer, is the tapered body . Due to the nature of the load, Cartwright were able to taper the body from bottom to top inwards , enhancing the aerodynamic effect , in line with the cab aerodynamic components.
Steven Cartwright said: “All the components fitted were wind tunnel tested on scale models prior to final manufacture.
“Key areas were tested, such as the landing leg area and at the rear of the trailer, where we left the area open to allow for the air to pass under the chassis and out the rear of the trailer. This was proven to create less drag than enclosing the areas with aerodynamic panels.
“The Transport Research Laboratory ensured a third party monitored all road trial testing, and we are convinced it is the best system available today.’’
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