This hardly seems super fast, but it is a 37 knot cruiser

I wanted to see how fast a fairly well-protected cruiser could be. This one is a 37 knot light cruiser that has only 9-6in/55 QF, 6-4.7in AA, and 16-2pdr AA guns. The design does have a torpedo bulkhead and a 2in deck. This is the Springsharp report:

GB/CL/1921 very fast, Great Britain Light Cruiser laid down 1921 (Engine 1950)

Displacement:
 14,253 t light; 14,669 t standard; 15,603 t normal; 16,351 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
 (724.65 ft / 714.00 ft) x 68.00 ft x (19.00 / 19.74 ft)
 (220.87 m / 217.63 m) x 20.73 m  x (5.79 / 6.02 m)

Armament:
      9 - 6.00" / 152 mm 55.0 cal guns - 100.00lbs / 45.36kg shells, 150 per gun
   Quick firing guns in turret on barbette mounts, 1921 Model
   3 x Single mounts on centreline ends, majority forward
  1 raised mount - superfiring
      6 - 4.70" / 119 mm 45.0 cal guns - 52.35lbs / 23.75kg shells, 150 per gun
   Anti-air guns in deck mounts, 1921 Model
   6 x Single mounts on sides, forward deck aft
  6 raised mounts
      16 - 1.57" / 40.0 mm 45.0 cal guns - 2.00lbs / 0.91kg shells, 150 per gun
   Anti-air guns in deck mounts, 1921 Model
   4 x 2 row twin mounts on sides amidships
  4 raised mounts
      Weight of broadside 1,246 lbs / 565 kg

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 3.00" / 76 mm 480.00 ft / 146.30 m 12.00 ft / 3.66 m
 Ends: Unarmoured
   Main Belt covers 103 % of normal length
   Main belt does not fully cover magazines and engineering spaces

   - Torpedo Bulkhead:
  0.80" / 20 mm 480.00 ft / 146.30 m 19.00 ft / 5.79 m

   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 4.00" / 102 mm 3.00" / 76 mm  4.00" / 102 mm

   - Armoured deck - multiple decks: 2.00" / 51 mm For and Aft decks
 Forecastle: 2.00" / 51 mm  Quarter deck: 2.00" / 51 mm

   - Conning towers: Forward 4.00" / 102 mm,  Aft 0.00" / 0 mm

Machinery:
 Oil fired boilers, steam turbines, 
 Geared drive, 4 shafts, 193,743 shp / 144,532 Kw = 37.00 kts
 Range 5,400nm at 16.00 kts
 Bunker at max displacement = 1,682 tons

Complement:
 697 - 907

Cost:
 £3.273 million / $13.093 million

Distribution of weights at normal displacement:
 Armament: 430 tons, 2.8 %
 Armour: 2,744 tons, 17.6 %
    - Belts: 706 tons, 4.5 %
    - Torpedo bulkhead: 270 tons, 1.7 %
    - Armament: 400 tons, 2.6 %
    - Armour Deck: 1,314 tons, 8.4 %
    - Conning Tower: 54 tons, 0.3 %
 Machinery: 4,635 tons, 29.7 %
 Hull, fittings & equipment: 6,443 tons, 41.3 %
 Fuel, ammunition & stores: 1,351 tons, 8.7 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   20,829 lbs / 9,448 Kg = 192.9 x 6.0 " / 152 mm shells or 2.4 torpedoes
 Stability (Unstable if below 1.00): 1.12
 Metacentric height 3.5 ft / 1.1 m
 Roll period: 15.3 seconds
 Steadiness - As gun platform (Average = 50 %): 66 %
   - Recoil effect (Restricted arc if above 1.00): 0.27
 Seaboat quality  (Average = 1.00): 1.32

Hull form characteristics:
 Hull has rise forward of midbreak,
   an extended bulbous bow and a round stern
 Block coefficient (normal/deep): 0.592 / 0.597
 Length to Beam Ratio: 10.50 : 1
 'Natural speed' for length: 26.72 kts
 Power going to wave formation at top speed: 60 %
 Trim (Max stability = 0, Max steadiness = 100): 50
 Bow angle (Positive = bow angles forward): 12.00 degrees
 Stern overhang: 3.00 ft / 0.91 m
 Freeboard (% = length of deck as a percentage of waterline length):
    Fore end,  Aft end
    - Forecastle: 30.00 %,  36.00 ft / 10.97 m,  31.00 ft / 9.45 m
    - Forward deck: 30.00 %,  31.00 ft / 9.45 m,  31.00 ft / 9.45 m
    - Aft deck: 25.00 %,  23.00 ft / 7.01 m,  23.00 ft / 7.01 m
    - Quarter deck: 15.00 %,  23.00 ft / 7.01 m,  23.00 ft / 7.01 m
    - Average freeboard:  28.40 ft / 8.66 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 148.5 %
  - Above water (accommodation/working, high = better): 263.6 %
 Waterplane Area: 35,245 Square feet or 3,274 Square metres
 Displacement factor (Displacement / loading): 117 %
 Structure weight / hull surface area: 109 lbs/sq ft or 532 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.93
  - Longitudinal: 1.93
  - Overall: 1.00
 Hull space for machinery, storage, compartmentation is cramped
 Room for accommodation and workspaces is excellent
 Good seaboat, rides out heavy weather easily