Another DD class, this time from 1916-20. The Yelm Class was built in four groups, each differing in armament and machinery. Depicted is Group 1, built in 1916-17. Groups 2 & 3 were built in 1917 and group 4 was post-war, built from 1918-20. A total of 100 were planned with 86 laid down and 73 being completed and commissioned.
Group 1 - 29
Group 2 - 20
Group 3 - 13
Group 4 - 11 (13 cancelled after being laid down, 14 cancelled before being laid down)
GROUP 1
Displacement: 932 t standard; 1,015 t normal; 1,081 t full load
Length: 301'
Beam: 27'
Draught: 10'
Propulsion: 3 Boilers; 2 Steam Turbines; 2 shafts
Speed: 32 knots
Range: 3200 NM @ 12 knots
Complement: 106
Armament:
4 x 4"/40 QF (4 x 1)
3 x 12 Pdr QF (3 x 1)
4 x .303 MG (4 x 1)
4 x 21" Torpedo (2 x 2)
(Groups 2 & 3 will come later)