U.S. Navy/Mass Communication Specialist 1st Class James Kimber
The Navy is researching a new coating that could be used on submarines and other ships to help them glide more easily through the water, reducing fuel costs.
The substance, known scientifically as a superhydrophobic coating, repels water, reducing the drag created by a hull moving through the water. The Navy says it could save millions of dollars in ship fuel costs.
The coating has millions of pockets of air trapped underneath, which essentially create an air film that causes water to slide off a surface. That results in lower friction and significantly reduces drag.
"As much as 60 percent of fuel can be used on drag, maybe higher depending on speed. We have the potential of cutting that significantly," said Anish Tuteja, an associate professor of materials science and engineering at the University of Michigan, whose research the Office of Naval Research is sponsoring.
These repellent coatings aren't new. Tuteja's group has been doing this research for more than a decade, but it's hard to find a solution that's durable, especially when the environment is as harsh as the ocean.
"For this particular application, you have to get the texture exactly right. If the pores are too big, the water can essentially go into the pores and then it gets in and the drag actually increases, and if the pores are too small it doesn't create enough drag, so it had to be in the right regime to create drag," Tuteja said.
Tuteja and his team analyzed hundreds of chemical combinations before finding the right mix.
The goal is to make the coating last for several years, Tuteja said, and it could be applied by a spray similar to how paints are currently applied to the hull of a ship. The coating has a rough white surface because it has to be textured to create the air pockets, Tuteja said.
His team is also working on coatings that repel other liquids beside water, like oil, alcohol, and even peanut butter. Those coatings are being tested for a range of Pentagon uses such as for soldiers' uniforms and protective eye wear.
While there are various commercial applications for these coatings like preventing stains from liquids such as soda, juice, and alcohol on carpets and clothing, coatings for Navy application require "a lot more proving out," Tuteja said. It would be at least a few years out before they go onto ships.
Benjamin Franklin nailed it when he said, "Fatigue is the best pillow." True story, Benny. There's nothing like pushing your body so far past exhaustion that you'd willingly, even longingly, take a nap on a concrete slab.
Former President George W. Bush is calling for an end to the partial government shutdown, which is about to hit the one-month mark and is currently the longest shutdown in US history.
In an appeal made on Instagram, the 43rd president called on "leaders on both sides to put politics aside, come together, and end this shutdown." The caption was posted with an image of him and former First Lady Laura Bush giving pizza to their Secret Service detail.
Staff Sgt. Daniel Christopher Evans was arrested on Jan. 29, 2018. (Photo courtesy of Wilmington Police Department, North Carolina.)
A special operations Marine is due in court on March 7 after being arrested last year for allegedly assaulting his girlfriend, Task & Purpose has learned.
Staff Sgt. Daniel Christopher Evans was arrested and charged with assault inflicting serious injury on July 29, 2018, according to Jennifer Dandron, a spokeswoman for police in Wilmington, North Carolina. Evans is currently assigned as a Critical Skills Operator with the 2nd Marine Raider Battalion at Camp Lejeune, North Carolina, according to the Marine Corps Personnel Locator.
U.S. Army 1st Lt. Elyse Ping Medvigy conducts a call-for-fire during an artillery shoot south of Kandahar Airfield, Afghanistan, Aug. 22, 2014. Medvigy, a fire support officer assigned to the 4th Infantry Division's Company D, 1st Battalion, 12th Infantry Regiment, 4th Infantry Brigade Combat Team, is the first female company fire support officer to serve in an infantry brigade combat team supporting Operation Enduring Freedom. U.S. Army photo by Staff Sgt. Whitney Houston (Photo by U.S. Army photo by Staff Sgt. Whitney Houston)
Following Trump's inauguration, some supporters of ground combat integration assumed he would quickly move to reinstate a ban on women in jobs like the infantry. When this did not happen, advocates breathed a collective sigh of relief, and hundreds of qualified women charted a course in history by entering the newly opened occupational fields.
So earlier this week when the Wall Street Journal published an editorial against women in ground combat by conservative political commentator Heather Mac Donald, the inclination of many ground combat integration supporters was to dismiss it outright. But given Trump's proclivity to make knee jerk policy decisions in response to falling approval ratings and the court's tradition of deference to the military when it comes to policies affecting good order and discipline, it would be unwise to assume the 2016 lifting of the ban on women in ground combat is a done deal.