Integration biggest challenge for railgun.

• Author: Versprille, Allyson
• Position: Global Defense

* As the Navy prepares to test its electromagnetic railgun at sea for the first time in 2016, service leaders said one of the biggest challenges will be integrating the new technology onto existing platforms.

The railgun is expected to increase the military's lethality and effectiveness by firing shells at Mach 6--six times the speed of sound--and hitting targets more than 100 nautical miles away.

The weapon's use of electricity as opposed to chemical propellants eliminates the hazards of high explosives in the ship and unexploded ordnance on the battlefield, according to an Office of Naval Research factsheet. The Navy is testing the technology for the first time at sea late in the summer of 2016 aboard the USNS Trenton, a Spearhead-class joint high-speed vessel.

"A joint, high-speed vessel--when you don't have Marines or people on it--has 600 tons of available margin," said Vice Adm. William Hilarides, commander of Naval Sea Systems Command. "That is a lot of space, weight and center of gravity."

Electric generators will be added to the top of the vessel in storage containers called conex boxes along with devices installed on the ship's deck that will pull in seawater to cool the system. The extra space and weight available on the ship will allow the service to add the technology with relative ease, he said at a conference.

Hilarides said he is positive the Navy will successfully demonstrate the weapon's ability to fire from the Trenton, but one of the biggest challenges will be configuring the railgun so that it fits within the power structure of other existing platforms.

"Those are not 600-ton margin ships," he said. "If they have 60 tons, if they have 16 tons, then we'll be talking about what do we take off our...