ARGUS (2nd Dec., 1917) Late Liner
Displacement: 14,450 tons standard; 15,750 tons (full)
Length: (p.p.) 535 ft, (w.l.) 560
ft, 565 ft (o.a.)
Beam: 68 ft
Draught: 21 ft (mean)
Aircraft: about 20
6 - 4 inch AA
4 - 3 pdr.
Machinery:Parsons turbines. 4 screws. Designed S.H.P.: 20,000
= 20.2 kts. Boilers: 12 cylindrical with Howdens forced draught.
Fuel: 2000 tons oil.
General notes: Begun 1914, by Beardmore, for Italian
Lloyd Sabaudo Line, as S.S. Conte Rosso. All work on her ceased
in 1914. She was purchased in 1916 and converted to Aircraft
Carrier. Completed September, 1918. Refitted 1925-26, and Bulges
fitted, extending from Section 4 to Section 19.
Capacity : Hangar is 350 ft long by 68 ft wide and 48
ft clear width, 20 ft clear height. Its divided into four section
by fire-proof screens, and can accommodate 20 aeroplanes of sea
and land types.
Handling gear: Two electrically controlled lifts for raising
airdraft from hangar to flight deck. Forward lift, 30 ft x 36
ft. After lift, 60 ft x 18 ft. When forward lift is at flight
deck level, two roller platforms slide to the sides to the sides
and uncover well opening. When lift descends, the platforms are
closed together and give a 20-ft platform for flying off. When
a deck load of aeroplanes is carried, wind-breaking palisades
can be raised simultaneously to 14 ft above flying deck. Two
derricks with electric winches amidships on flight deck and two
electric cranes at stern on hangar deck level; all to pick up
aeroplanes from the water.
Engineering notes: At the time designs were got out, a
0.4 inch scale model was prepared for testing in the air tunnel
at the National Physical Laboratory, Teddington, to solve various
structural problems and to test eddy-making effects of hull.
It was found that the emission of hot furnace gases from the
usual type of funnels created such serious air disturbances.Safe
landings would be very difficult. Accordingly, horizontal smoke-ducts
with big expelling fans were fitted, to deliver all furnace gases
and smoke out abaft hangar, or alternatively through flight deck.
Designes for 18 kts, but modifications during conversion raised
speed by 2 kts. Mean H.P. on trial, 21,376 = 20.5kts.