HMS K4 was a K-class submarine of the British Royal Navy. Launched on 13 July 1916, she was commissioned on 1 January 1917.
K4 had an accident prone career, first being stranded on Walney Island in January 1917, followed by a collision with HMS K1 on 17 November 1917. This resulted in the loss of K1 although her crew were rescued.
On 31 January 1918, during a night time fleet exercise K4 was sunk after colliding with K6 and K7, while she was attempting to avoid K3. HMS K4 was lost with all hands.
HMS K-4 at sea with diesel engines runningHMS K4 at seaHMS K3 and HMS K4 at seaHMS King George V at anchor in the Firth of Forth, 1917 with the submarine HMS K4 alongsideHMS K-4 on the shallows of Walney Island at low tide, January 1917HMS K4 BeachedHMS K-4 on the shallows of Walney Island at low tide, January 1917
The third of the Conte di Cavour-class battleships, Leonardo da Vinci was launched on14 October 1911 and commissioned into the Italian Regia Marina on 17 May 1914. She saw no action during the First World War and was sunk by internal explosion on 2 August 1916. Italy blamed the loss on Austro-Hungarian saboteurs although the loss may have been accidental.
The wreck was refloated and righted, but plans to refurbish her were cancelled due to budgetary constraints. The hulk was sold for scrap in 1923.
Displacement
23,088 long tons (23,458 t) (standard) 25,086 long tons (25,489 t) (deep load)
3 × triple, 2 × twin 305 mm (12 in) guns 18 × single 120 mm (4.7 in) guns 14 × single 76.2 mm (3 in) guns 3 × 450 mm (17.7 in) torpedo tubes
Armor
Waterline belt: 80–250 mm (3.1–9.8 in) Deck: 24–40 mm (0.94–1.57 in) Gun turrets: 240–280 mm (9.4–11.0 in) Barbettes: 130–230 mm (5.1–9.1 in) Conning tower: 280 mm (11 in)
Conte di Cavour class battleshipConte di Cavour-class main weaponsLeonardo Da Vinci Being LaunchedLeonardo da VinciLeonardo da VinciLeonardo da VinciLeonardo da VinciLeonardo da Vinci leaving Taranto Harbour in July, 1916Leonardo da Vinci in the flooded Bacino Ferrati, July 1916Leonardo da VinciLeonardo Da Vinci
Leonardo Da Vinci Being Refloated
August 3, 1916, The capsized battleship Leonardo da VinciLeonardo da Vinci upside downLeonardo Da Vinci Being RefloatedUpside down Leonardo da VinciLeonardo da Vinci being rightedLeonardo Da Vinci Being RefloatedLeonardo Da Vinci After Being RefloatedLeonardo da Vinci battleship wreckage being righted on 25 January 1921.Leonardo da Vinci after being raised with funnels, gun turrets and masts removedLeonardo da Vinci, raised and turned right side up again after its 1916 sinking, moored in the Mar Piccolo of Taranto, 1922Wreck of Leonardo da VinciTwo triple 305 mm turrets of the sunken battleship Leonardo da Vinci, after being salvaged, February 1921
Designed and constructed during the final months of the First World War, the Mannesmann Giant Triplane was still under construction at the time of the armistice. Although designed as a transport, the Inter-Allied Aeronautical Control Commission believed that it was a bomber designed to reach New York.
The finished aircraft would have had a length of 46m and a wing span of 50m.
Mannesmann giant triplaneMannesmann giant triplane – fuselage interior viewWing of the Mannesmann Giant Triplane being transportedWing of the Mannesmann Giant TriplaneFuselage of the Mannesmann Giant Triplane being transportedFuselage of the Mannesmann Giant Triplane being transportedFuselage of the Mannesmann Giant Triplane being transportedFuselage of the Mannesmann Giant Triplane being transportedFuselage of the Mannesmann Giant Triplane being transportedFuselage of the Mannesmann Giant Triplane being transportedFuselage of the Mannesmann Giant Triplane being transportedFuselage of the Mannesmann Giant Triplane being transportedFuselage of the Mannesmann Giant Triplane being transportedFuselage of the Mannesmann Giant Triplane being transportedAllied inspection posing with one of the wheels of the incomplete Mannesmann triplane, 1919
