A German super-cannon designed by Saar Roechling during World War II; also known as the Hochdruckpumpe (HDP), 'Fleissiges Lieschen', and 'Tausend Fussler'. The 140-meter V-3 was capable of sending a 140-kg shell over a 165km range. Construction began of a bunker for the cannons i... Found on http://www.daviddarling.info/encyclopedia/V/V-3.html
Long-range smooth-bore gun designed to fire shells with up to 10kg (22lb) high-explosive warhead and a range of 93km - never very successful as most installations were destroyed by bombing before they could be used Found on https://www.encyclo.co.uk/local/20490