In October 1948 a Boeing team was at Wright Field, Ohio, when a USAF officer rejected their turboprop bomber and told them to come back with an all-jet, swept-wing design. Over one weekend at the Hotel Van Cleve in Dayton, Ed Wells, George Schairer, Vaughn Blumenthal and colleagues reworked the entire concept, produced fresh three-view drawings and a written proposal, and built a hand-carved balsa-wood scale model bought from a nearby hobby shop. By Monday they had the aircraft that became the B-52.

Details vary in the telling — sources give the proposal as 33 or 35 pages, and disagree over who carved the model — but the essence is agreed: one of the longest-serving combat aircraft in history was sketched out over a single weekend. More than seventy years later, that same basic airframe is being upgraded to fly on for decades more.

Under the Commercial Engine Replacement Program (CERP), all eight ageing Pratt & Whitney TF33 turbofans are being replaced with eight Rolls-Royce F130 engines — a military version of a business-jet engine, built in Indianapolis. Crucially it is an eight-for-eight swap: the Air Force studied re-engining with four larger engines and rejected it, because the redesign and engine-out control problems outweighed the benefits. The gains come from efficiency and reliability, not raw thrust. Combined with a new AESA radar (fielded as the AN/APQ-188, derived from fighter radars), the upgraded H-models are re-designated B-52J — upgraded aircraft, not new builds. CERP cleared its critical design review in 2026, though the wider modernisation has slipped, with initial operating capability now expected around the early 2030s.

Early B-52s carried four .50-calibre machine guns in a tail turret; the B-52H swapped them for a single 20mm cannon. During Operation Linebacker II in December 1972, B-52 tail gunners were officially credited with shooting down two MiG-21s — SSgt Samuel Turner on 18 December and A1C Albert Moore on 24 December, both firing .50-cal guns from B-52Ds. The U.S. Air Force treats both as confirmed, though gunners claimed five kills and only two were credited, and Vietnamese records do not acknowledge those particular losses. Even hedged, they stand as the last — and only jet-age — air-to-air gun kills scored by a bomber’s own tail guns. All B-52 tail guns were removed by the mid-1990s.

The U.S. Air Force lists a unit cost of $84 million in FY2012 dollars; the often-quoted 1962 flyaway figure of about $9.3 million (roughly $95–100 million today) is a widely-repeated legacy number rather than a first-tier source, so treat it as an estimate. What matters strategically is the operating cost: the B-52 flies for roughly $62,000–$70,000 per hour depending on year and accounting — far below the stealth B-2’s figure of around $170,000. That affordability, as much as any upgrade, is why a 1960s bomber keeps outlasting the exotic aircraft built to replace it.