In 1943 Britain seriously planned to fight U-boats from a warship the length of six football fields, built not from steel but from frozen water mixed with wood pulp. It was bulletproof, nearly unsinkable, and backed by Churchill himself. A scale model spent three summers refusing to melt in a Canadian lake — and then the whole idea quietly disappeared.
The plan: a 2,000-foot, 2-million-ton aircraft carrier of reinforced ice to close the mid-Atlantic 'air gap' where U-boats hunted convoys beyond aircraft range.
A tight, well-told primer on how a genuinely absurd-sounding idea got Cabinet-level backing during the darkest stretch of the Battle of the Atlantic.
Geoffrey Pyke: escaped WWI prisoner, failed commodities speculator, and self-taught inventor whose wild memos somehow reached the top of the British war effort.
Freeze water with 14% wood pulp and you get a material as strong as concrete, slow to melt, and — famously — able to stop a pistol round cold.
A hands-on look at pykrete's bizarre properties — including the legendary demonstration where a bullet fired into a block ricocheted back at the room.
The full narrative — Mountbatten reportedly bursting into Churchill's bath with a block of pykrete, and the scale prototype that survived three summers on a lake in Alberta.
Ballooning costs, monstrous refrigeration needs, and — decisively — longer-range aircraft that closed the air gap first. How a wonder-weapon became a footnote.