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The single rear axle allows Class 7 ratings, but this one’s decidedly Class 8, with axles...
The Cummins ISL9 is masked by plumbing, but daily fluid checks are within easy reach. The... A big windshield and sloping hood allow good views of traffic ahead, even if it’s annoyingly...
The interior has lots of plastic and vinyl, but still looks good. Gauges and controls are where... This Granite galvanized steel cab is rugged and roomy. The fuel tank and blue-capped DEF tank...
Kenworth's Advantage tractor-trailer is a working concept vehicle engineered to produce optimum...
Manufacturers use wind tunnel testing to optimize aerodynamic drag while maintaining brand...
The first of its kind, the FlowBelow Tractor AeroKit consists of aerodynamic wheel covers and...

A Change in Aerodynamics

Most of the low-hanging aerodynamic fruit has already been plucked from the engineering tree. Truck makers and their design teams are now actively exploring options they would have ignored a decade ago. It's all about the cost of fuel. The big shift to slope-nosed aero trucks began nearly 20 years ago, and since then engineers and designers have been refining the design. Today we see tweaks and twists yielding just the tiniest of gains, yet they are all steps in the right direction. What follows is a pictorial review of some of the changes we've seen in recent years -- some dramatic, some very subtle, but all aimed at killing fewer bugs. By Jim Park, Equipment Editor

Trucks at the Green Fleet Conference Ride & Drive
Chevy Bi-Fuel Silverado CNG
2013 F-550 Bi-fuel CNG

Trucks at the Green Fleet Conference Ride & Drive

The Ride & Drive event at the Green Fleet Conference in Phoenix Oct. 1 gave attendees a chance to drive everything from Segways and an electric Smart Car to bi-fuel heavy-duty pickups and a medium-duty electric hybrid. Here's a sampling of the cargo vans and commercial trucks on display.

Test Drive: Freightliner NG Cascadia 113
The passive three-way-catalyst exhaust aftertreatment system used onspark-ignited natural gas...
The aft section of the 40 DGE compressed natural gas fuel tank has twofill ports; one for use at...
Test Drive: KW T800, ISX12 G Paired
This tall cabinet behind the Kenworth T800’s cab houses four “bottles” that carry CNG for the...
More than a “spare,” this switch opens or closes gas flow to the KW’s engine. If it’s off, the...
Inside TMC's 2013 SuperTech Competition
Inside TMC's 2013 SuperTech Competition
Photos by Marsh Galloway, courtesy of the Technology & Maintenance Council, http://tmc.trucking.org.

Inside TMC's 2013 SuperTech Competition

The Technology & Maintenance Council of ATA said 128 technicians from around the U.S. won their way to Pittsburgh for the 2013 SuperTech competition by topping hundreds more competitors in state-level contests. SuperTech, now in its ninth year, is the highest level in the nationwide competition that encourages talented young people to become truck technicians and honors them for their prowess. Photos by Marsh Galloway, courtesy of the Technology & Maintenance Council, http://tmc.trucking.org.

This six-axle FDB6000 for Ohio has three air-suspended lift axles, including a hydraulically...
A stainless steel cab offers more leg and head room for drivers. A joystick operates chute,...
Compared to previous models, the front driving axle is 16 inches farther forward, steering gear...

Test Drive: Terex FDB6000

HDT Editor Tom Berg recently took a Test Drive of the Terex FDB6000. Check out the slide show of this front-discharge mixer.

Kenworth Medium-Duty Editors Event
Kenworth Medium-Duty Editors Event
The K270 Cabover Aero Van is a full COE and was equipped with a PX-6 engine mated to an Allison...

Kenworth Medium-Duty Editors Event

Kenworth hosted several medium-duty truck editors and journalists at an event in the Seattle, Wash., area, including a drive on their technical track in Bellevue, Wash.