Lancaster Lowry, 71, a chemical engineer for the Navy Department and a member of the original band of the Washington Redskins football team, died at Prince George's General Hospital Friday as the result of a stroke.

Mr. Lowry went to work for the Navy in 1926 at the same time he was taking night courses at George Washington University. He earned both bachelor's and master's degrees in chemical engineering at the school and remained in the government service until his retirement in 1959.

In 1937, the Redskins' first season in Washington after they moved from Boston, Mr. Lowry became a clarinet player in the team band, originally pickup organization, and remained with it until he retired in 1974 as the result of a disability.

Mr. Lowry also was active in civic affairs in Mount Rainier, where he had lived since he came to the Washington area in 1925 from his hometown in Johnstown, Pa. He received the Mount Rainier Civic Association's Outstanding Citzens Trophy in 1957 and headed the city's civil defense office for 20 years until his retirement last May.

He was a member of the American Electroplaters Association and was a past president of its Baltimore-Washington branch, a member of the American Chemical Society and a member of the Washington Society of Engineers. He also was a member of the Friendship Oddfellows Lodge No. 100 for 43 years.

Survivors include his wife, Mary Westcott Lowry, of the home in Mount Rainier