Point Class-

Point Class, Colony of Victoria Torpedo Boat laid down 1905

Displacement:

177 t light; 183 t standard; 196 t normal; 206 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)

(165.53 ft / 165.03 ft) x 15.49 ft x (6.50 / 6.72 ft)

(50.45 m / 50.30 m) x 4.72 m x (1.98 / 2.05 m)

Armament:

2 - 1.85" / 47.0 mm 40.0 cal guns - 3.04lbs / 1.38kg shells, 250 per gun

Breech loading guns in deck mounts, 1905 Model

2 x Single mounts on centreline ends, evenly spread

2 raised mounts

2 - 0.30" / 7.7 mm 45.0 cal guns - 0.01lbs / 0.00kg shells, 1,000 per gun

Breech loading guns in deck mounts, 1905 Model

2 x Single mounts on sides, forward deck aft

2 raised mounts

Weight of broadside 6 lbs / 3 kg

2 - 18.0" / 457 mm, 18.00 ft / 5.49 m torpedoes - 0.784 t each, 1.568 t total

In 1 sets of deck mounted centre rotating tubes

Armour:

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)

Main: 0.50" / 13 mm - -

Machinery:

Coal fired boilers, simple reciprocating steam engines,

No drive to shaft, 2 shafts, 4,658 ihp / 3,475 Kw = 25.07 kts

Range 2,000nm at 7.27 kts

Bunker at max displacement = 23 tons (100% coal)

Caution: Delicate, lightweight machinery

Complement:

26 - 34

Cost:

£0.024 million / $0.096 million

Distribution of weights at normal displacement:

Armament: 3 tons, 1.4 %

- Guns: 1 tons, 0.6 %

- Torpedoes: 2 tons, 0.8 %

Armour: 2 tons, 1.2 %

- Armament: 2 tons, 1.2 %

Machinery: 126 tons, 64.0 %

Hull, fittings & equipment: 47 tons, 23.8 %

Fuel, ammunition & stores: 19 tons, 9.7 %

Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:

Survivability (Non-critical penetrating hits needed to sink ship):

35 lbs / 16 Kg = 11.1 x 1.9 " / 47 mm shells or 0.1 torpedoes

Stability (Unstable if below 1.00): 1.40

Metacentric height 0.5 ft / 0.2 m

Roll period: 8.8 seconds

Steadiness - As gun platform (Average = 50 %): 39 %

- Recoil effect (Restricted arc if above 1.00): 0.08

Seaboat quality (Average = 1.00): 0.60

Hull form characteristics:

Hull has raised forecastle,

a normal bow and a round stern

Block coefficient (normal/deep): 0.413 / 0.420

Length to Beam Ratio: 10.66 : 1

'Natural speed' for length: 12.85 kts

Power going to wave formation at top speed: 69 %

Trim (Max stability = 0, Max steadiness = 100): 50

Bow angle (Positive = bow angles forward): 0.00 degrees

Stern overhang: 0.50 ft / 0.15 m

Freeboard (% = length of deck as a percentage of waterline length):

Fore end, Aft end

- Forecastle: 20.00 %, 9.00 ft / 2.74 m, 9.00 ft / 2.74 m

- Forward deck: 30.00 %, 6.50 ft / 1.98 m, 6.50 ft / 1.98 m

- Aft deck: 35.00 %, 6.50 ft / 1.98 m, 6.50 ft / 1.98 m

- Quarter deck: 15.00 %, 6.50 ft / 1.98 m, 6.50 ft / 1.98 m

- Average freeboard: 7.00 ft / 2.13 m

Ship tends to be wet forward

Ship space, strength and comments:

Space - Hull below water (magazines/engines, low = better): 208.3 %

- Above water (accommodation/working, high = better): 62.0 %

Waterplane Area: 1,586 Square feet or 147 Square metres

Displacement factor (Displacement / loading): 12 %

Structure weight / hull surface area: 14 lbs/sq ft or 68 Kg/sq metre

Hull strength (Relative):

- Cross-sectional: 0.46

- Longitudinal: 1.81

- Overall: 0.53

Hull space for machinery, storage, compartmentation is extremely poor

Room for accommodation and workspaces is cramped

Caution: Lacks seaworthiness - very limited seakeeping ability

Designed to replace the aging and entirely obsolete Lonsdale and Nepean, the Point Class was the Colonies first attempt at a 20th century combat vessel. The design phase was slow and added 40t to the displacement as 4 years of development was contributed, by the end of 1903 the design was complete but budgeting saw construction delayed by 14 months. Governor Brassey had a large amount of input, but regardless the ships were considered mediocre by the standards of 1905 but were a vast improvement over the previous boats which they were to replace eventually.

*placeholder for HMSAS Sir William Jervois

Point Class, Colony of Victoria Torpedo Boat laid down 1905

Displacement:

177 t light; 183 t standard; 196 t normal; 206 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)

(165.53 ft / 165.03 ft) x 15.49 ft x (6.50 / 6.72 ft)

(50.45 m / 50.30 m) x 4.72 m x (1.98 / 2.05 m)

Armament:

2 - 1.85" / 47.0 mm 40.0 cal guns - 3.04lbs / 1.38kg shells, 250 per gun

Breech loading guns in deck mounts, 1905 Model

2 x Single mounts on centreline ends, evenly spread

2 raised mounts

2 - 0.30" / 7.7 mm 45.0 cal guns - 0.01lbs / 0.00kg shells, 1,000 per gun

Breech loading guns in deck mounts, 1905 Model

2 x Single mounts on sides, forward deck aft

2 raised mounts

Weight of broadside 6 lbs / 3 kg

2 - 18.0" / 457 mm, 18.00 ft / 5.49 m torpedoes - 0.784 t each, 1.568 t total

In 1 sets of deck mounted centre rotating tubes

Armour:

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)

Main: 0.50" / 13 mm - -

Machinery:

Coal fired boilers, simple reciprocating steam engines,

No drive to shaft, 2 shafts, 4,658 ihp / 3,475 Kw = 25.07 kts

Range 2,000nm at 7.27 kts

Bunker at max displacement = 23 tons (100% coal)

Caution: Delicate, lightweight machinery

Complement:

26 - 34

Cost:

£0.024 million / $0.096 million

Distribution of weights at normal displacement:

Armament: 3 tons, 1.4 %

- Guns: 1 tons, 0.6 %

- Torpedoes: 2 tons, 0.8 %

Armour: 2 tons, 1.2 %

- Armament: 2 tons, 1.2 %

Machinery: 126 tons, 64.0 %

Hull, fittings & equipment: 47 tons, 23.8 %

Fuel, ammunition & stores: 19 tons, 9.7 %

Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:

Survivability (Non-critical penetrating hits needed to sink ship):

35 lbs / 16 Kg = 11.1 x 1.9 " / 47 mm shells or 0.1 torpedoes

Stability (Unstable if below 1.00): 1.40

Metacentric height 0.5 ft / 0.2 m

Roll period: 8.8 seconds

Steadiness - As gun platform (Average = 50 %): 39 %

- Recoil effect (Restricted arc if above 1.00): 0.08

Seaboat quality (Average = 1.00): 0.60

Hull form characteristics:

Hull has raised forecastle,

a normal bow and a round stern

Block coefficient (normal/deep): 0.413 / 0.420

Length to Beam Ratio: 10.66 : 1

'Natural speed' for length: 12.85 kts

Power going to wave formation at top speed: 69 %

Trim (Max stability = 0, Max steadiness = 100): 50

Bow angle (Positive = bow angles forward): 0.00 degrees

Stern overhang: 0.50 ft / 0.15 m

Freeboard (% = length of deck as a percentage of waterline length):

Fore end, Aft end

- Forecastle: 20.00 %, 9.00 ft / 2.74 m, 9.00 ft / 2.74 m

- Forward deck: 30.00 %, 6.50 ft / 1.98 m, 6.50 ft / 1.98 m

- Aft deck: 35.00 %, 6.50 ft / 1.98 m, 6.50 ft / 1.98 m

- Quarter deck: 15.00 %, 6.50 ft / 1.98 m, 6.50 ft / 1.98 m

- Average freeboard: 7.00 ft / 2.13 m

Ship tends to be wet forward

Ship space, strength and comments:

Space - Hull below water (magazines/engines, low = better): 208.3 %

- Above water (accommodation/working, high = better): 62.0 %

Waterplane Area: 1,586 Square feet or 147 Square metres

Displacement factor (Displacement / loading): 12 %

Structure weight / hull surface area: 14 lbs/sq ft or 68 Kg/sq metre

Hull strength (Relative):

- Cross-sectional: 0.46

- Longitudinal: 1.81

- Overall: 0.53

Hull space for machinery, storage, compartmentation is extremely poor

Room for accommodation and workspaces is cramped

Caution: Lacks seaworthiness - very limited seakeeping ability