Bild has a report today of a 1,000 Kilo Glider - bomb (Segel-Bomber ) which was to be released from a bomber and guided down at a speed up to 1125 Kph by a pilot who would evacuate and parachute down.
These detailed pencil drawings are said to have been found in July 1945 in Hitler's Reich's Chancellery in Berlin and are being sent for sale to a London auction house.
All seems very unlikely.
UPDATE : Not so unlikely after all Daily Telegraph has a story later - The drawings were found in Berlin by Richard Rex who had been sent to Germany in 1945 to help establish a medical dispensary.
International Autograph Auctions is selling the plans on Dec 13 at the Radisson Edwardian Hotel, Heathrow, London. They are estimated to fetch between £2,000 and £3,000.
See also as Stef suggests looking at this Wikipedia page Natter (Adder) the Bachem Ba 349 experimental rocket powered interceptor aircraft.