John D. Knapton

John Douglas Knapton, a brilliant research physicist, international weapons expert, and devoted patriarch, passed away peacefully in Towson, Maryland, on October 4, 2026, at the age of 94.

Born on November 24, 1931, in Quincy, Massachusetts, John was the son of the late Alfred Taylor Knapton, a WWI veteran, and Ella Adams Johnson Knapton. Growing up during the hardships of the Great Depression, he learned the values of hard work and independence early on. He received his bachelor's degree from the University of Massachusetts in 1954, and his masters degree from Williams College in 1956. On August 18, 1957, John married Joan Jacobson in Quincy, Massachusetts. Together, they built a beautiful life and became the proud parents of seven children.

John honorably served his country, first as a commissioned Second Lieutenant in the U.S. Army, and later through a distinguished 39-year civilian career with the United States military. For decades, he served as a career research physicist for the U.S. Army Ballistic Research Laboratory (BRL) and the U.S. Army Research Laboratory at the Aberdeen Proving Ground in Maryland.

John was a pioneering authority in interior ballistics and experimental gun propulsion. He specialized in liquid propellant gun technology, studying ignition systems, flame temperatures, and pressure dynamics. He co-authored Liquid Propellant Gun Technology for the American Institute of Aeronautics and Astronautics, alongside numerous Defense Technical Information Center (DTIC) reports.

His professional life took him on adventures abroad, where he enjoyed traveling throughout Europe for work, particularly to Sweden, Germany, Switzerland, and Russia.

John loved spending time in the wilderness, hiking, skiing, and climbing Mount Washington and exploring the White Mountains and Colorado.

He enjoyed listening to classical music, watching British television, and gathering together with his large family. He was a generous man and family historian, writing a 300-page memoir titled Earth, Air, Water, Fire, and Color.

Above all, John was dedicated to his family. He was preceded in death by his beloved wife, Joan (Jacobson) Knapton, and his son, Alan Knapton. He is survived by his six children, Edward (Ellen) Knapton, Debbie Dunbar, Julie (David) Lynn, Mary (Charles) Goldsborough, Carolyn (Nathan) Barcomb, William (Alison) Knapton; son-in-law Mike Dunbar and daughter-in-law Diana Knapton; 25 grandchildren—Lindsey, Kaleigh, Douglas, Clara, Adam, Julianna, Michael Jr., Christina, Conner, Ryan, Natalie, John, Anna, Nigel, Charles IV, John Emmerson, Graham, Conrad, Hannah, Phoebe, Alice, Owen, Iris, Oliver, Eve; and six great-grandchildren—Aiden, Aspen, Felix, Theodore, Alexander, and Margaret, in whom he took immense pride.

John leaves behind a legacy of profound curiosity, quiet kindness, intellectual achievement, and an enduring love of life