An official website of the United States government
Here's how you know
A .mil website belongs to an official U.S. Department of Defense organization in the United States.
A lock (lock ) or https:// means you’ve safely connected to the .mil website. Share sensitive information only on official, secure websites.

100th Anniversary Logo with the 100 in large letters and the museum logo
Open 9 a.m. to 5 p.m. seven days a week.
FREE Admission & Parking

MD-3 Ground Power Unit

This unit was designed to provide 28-volt DC 1500 amp, 115/220-volt AC three-phase electrical power for B-47 aircraft for ground operation and start. It also can be used with other aircraft (such as the T-33) that have power requirements compatible with its output. It uses a Continental 180-hp six-cylinder reciprocating engine to drive its electrical generators.

The unit was restored for the museum by the 4950th Field Maintenance Squadron, Wright-Patterson Air Force Base, Ohio, in 1979-1980.

Click here to return to the Cold War Gallery.