Mobile Air and Light



Arlington, Virginia

Air & Light


The Arlington County, Virginia Fire Department contracted with Hackney to manufacture eight (8) High Performance Mobile Air Units for the National Capital Region (NCR). These jurisdictions include the Arlington County Fire Department, District of Columbia Fire Department, Montgomery County Fire Department, Prince George's County Fire Department, City of Alexandria Fire Department, Fairfax County Fire-Rescue, Prince William County Fire-Rescue, and the Loudoun County Fire Department. There units can be used as required by each of the jurisdiction, as required, for local incidents and are rapidly deployable for use anywhere in the National Capital Region.

The units were purchased under a Department of Homeland Security grant known as U.A.S.I. (Urban Area Security Initiative). Battalion Chief Doug Insley of the Arlington County FD was the project manager for this initiative which is part of the NCR firefighter respiratory protection program. Chief Insley led a task group to design a mobile air unit that would be able to sustain operations during any type of regional or localized emergency or disaster operation with the NCR. These include such target hazards as the Pentagon in Arlington County, the Capitol and White House in DC, the CIA in Fairfax and all the other sensitive federal installations in the region, as well as the Metro Rail System which is the second largest in the United States with an annual ridership of 190 million people.

The task group worked closely with Hackney and Scott Air to design a mobile unit that would meet the establish performance for filling not less than sixty one-hour, 4500 psi SCBA's per hour over a sustained period of time. The concept also required the ability to transport not less than ninety-six (96) filled one-hour bottles and twenty (20) complete SCBA's with filled one-hour cylinders. Another important criteria was to minimize the wheelbase to a manageable length due to the dense traffic pattern and tight operations zones in which the units would be required to respond.

The compressor is a 65 cfm, air-cooled block rated at 6000 psi. Scott designed an automatic manifold system that permits three RevolveAir 2X2 fill stations to be operations simultaneously. The RevolveAir technology vastly increased the number of fills at each station, documented at 25% faster than conventional cascading methods. The system provides for two bottles to be filled while two are being removed and two empties are attached. By the time these functions are complete, the two in the fill chamber are completely charged, allowing the operator to rotate the full bottles out while simultaneously rotating the empties into the chamber. Fast and simple. The electronics incorporated into the system provide automatic fill rates and keeps the ten (10) 6000 psi ASME's fully charged between SCBA charge cycles. One of the three stations provides for conventional cascading should air quality shut-down the compressor. There is one station on each side of the body and one in the rear providing an unobstructed for each operator. All three stations are provided with electrically controlled awnings.

Using the exclusive Hackney drop/pinch frame technology allowed Hackney to squeeze all the requirements into a compact wheelbase (223") using a 19.5-ft body with all roll-up doors. The massive 75,000 watt generator is mounted inside the left front compartment, protecting it from corrosive road spray. A four-lamp light tower is mounted inside a limb guard on the body roof. Two (2) MagnaFire flood lights are installed on the upper left and right sides of the body. High pressure and low pressure utility air hose reels and cord reels in strategically provided. The mobile units are NFPA 1901 compliant and feature a 100% multiplexed electrical system with digital and graphic LCD screen controls and diagnostics. All emergency lighting, compartment lighting and clearance and tail lights are LED.