WesWorld

Intended for Long-endurance work in the Northern/Polar territories, and built with the experience gained from the St. Roch type Schooners and the converted 2,000 ton tramp steamers.

Would've been nice to build some Polar 8's, but I they'd cost as much (and take as long) as additional Canadas... ><


HMCS Sir John Franklin, Canadian Polar Navigation Ship laid down 1936

Displacement:
9,999 t light; 10,439 t standard; 17,791 t normal; 23,673 t full load

Dimensions: Length overall / water x beam x draught
392.43 ft / 386.00 ft x 65.00 ft (Bulges 80.00 ft) x 25.00 ft (normal load)
119.61 m / 117.65 m x 19.81 m (Bulges 24.38 m) x 7.62 m

Armament:
6 - 5.50" / 140 mm guns (2x3 guns), 83.19lbs / 37.73kg shells, 1936 Model
Dual purpose guns in turrets (on barbettes)
on centreline ends, evenly spread
32 - 1.57" / 40.0 mm guns (4x8 guns), 1.95lbs / 0.89kg shells, 1936 Model
Anti-aircraft guns in deck mounts
on side, all amidships, all raised mounts - superfiring
12 - 0.79" / 20.0 mm guns (6x2 guns), 0.24lbs / 0.11kg shells, 1936 Model
Machine guns in deck mounts
on side, evenly spread, 4 raised mounts
Weight of broadside 565 lbs / 256 kg
Shells per gun, main battery: 250

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 2.00" / 51 mm 220.00 ft / 67.06 m 25.00 ft / 7.62 m
Ends: 4.00" / 102 mm 50.00 ft / 15.24 m 25.00 ft / 7.62 m
116.00 ft / 35.36 m Unarmoured ends
Main Belt covers 88 % of normal length

- Torpedo Bulkhead and Bulges:
2.00" / 51 mm 350.00 ft / 106.68 m 25.00 ft / 7.62 m

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 1.00" / 25 mm 0.50" / 13 mm 0.50" / 13 mm
2nd: 0.50" / 13 mm - -

Machinery:
Diesel Internal combustion generators plus batteries,
Electric motors, 2 shafts, 22,634 shp / 16,885 Kw = 20.00 kts
Range 20,000nm at 20.00 kts
Bunker at max displacement = 13,234 tons

Complement:
769 - 1,001

Cost:
£2.627 million / $10.507 million

Distribution of weights at normal displacement:
Armament: 71 tons, 0.4 %
Armour: 1,365 tons, 7.7 %
- Belts: 693 tons, 3.9 %
- Torpedo bulkhead: 648 tons, 3.6 %
- Armament: 25 tons, 0.1 %
- Armour Deck: 0 tons, 0.0 %
- Conning Tower: 0 tons, 0.0 %
Machinery: 635 tons, 3.6 %
Hull, fittings & equipment: 4,928 tons, 27.7 %
Fuel, ammunition & stores: 7,792 tons, 43.8 %
Miscellaneous weights: 3,000 tons, 16.9 %

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
49,658 lbs / 22,524 Kg = 596.9 x 5.5 " / 140 mm shells or 12.9 torpedoes
Stability (Unstable if below 1.00): 1.42
Metacentric height 4.8 ft / 1.5 m
Roll period: 15.3 seconds
Steadiness - As gun platform (Average = 50 %): 50 %
- Recoil effect (Restricted arc if above 1.00): 0.03
Seaboat quality (Average = 1.00): 1.14

Hull form characteristics:
Hull has rise forward of midbreak
and transom stern
Block coefficient: 0.807
Length to Beam Ratio: 4.83 : 1
'Natural speed' for length: 23.14 kts
Power going to wave formation at top speed: 60 %
Trim (Max stability = 0, Max steadiness = 100): 44
Bow angle (Positive = bow angles forward): 15.00 degrees
Stern overhang: 0.00 ft / 0.00 m
Freeboard (% = measuring location as a percentage of overall length):
- Stem: 24.00 ft / 7.32 m
- Forecastle (20 %): 20.00 ft / 6.10 m
- Mid (50 %): 20.00 ft / 6.10 m (14.00 ft / 4.27 m aft of break)
- Quarterdeck (15 %): 14.00 ft / 4.27 m
- Stern: 14.00 ft / 4.27 m
- Average freeboard: 17.32 ft / 5.28 m

Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 50.1 %
- Above water (accommodation/working, high = better): 95.8 %
Waterplane Area: 23,066 Square feet or 2,143 Square metres
Displacement factor (Displacement / loading): 287 %
Structure weight / hull surface area: 142 lbs/sq ft or 693 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 1.40
- Longitudinal: 2.73
- Overall: 1.50
Hull space for machinery, storage, compartmentation is excellent
Room for accommodation and workspaces is adequate

Automatic Dual-Purpose twin 5.5" guns simmed as triples.
Aviation Facilities - 500 tons
Winterization Package - 250 tons
Misc. Supplies - 2000 tons

old ship is old, but i put together a graphic for it rather than just using a 1980s concept sketch for the Polar 8s;

Nicely worked up. It's too bad some of the parts aren't just a wee bit sharper in quality, or it would really look excellent.

I spent most of the night redoing a lot of the lines from the graphic I nabbed most of the detail from. I may take another pass at it tomorrow and firm up some more of the detailing.

Cleaned up a bit.

Very interesting, just the sort of vessel the RCN needs.

I like it, not sure whether the 5.5in are really needed on this design, a smaller DP weapon might have sufficed but its certainly an interesting ship.

Needs proper weaponry to take on the Polar Bears.

Well, the USCGC Bear has 4 5/38s, the Russian icebreakers have 4 130mm guns, and the Phillipino antarctic ship has a pair of 6 inch guns. So it seemed prudent at the time.

Two more old ships;

the two freighters Canada seized in the early 30s as auxilliaries.

Creed-derived testbed (of which Chile bought six, Canada has one)

Quoted

Originally posted by ShinRa_Inc
Well, the USCGC Bear has 4 5/38s, the Russian icebreakers have 4 130mm guns, and the Phillipino antarctic ship has a pair of 6 inch guns. So it seemed prudent at the time.

And let's not forget the Chinese antarctic ship, which has 3x8"...

The drawing of the Lockhart shows a rather interesting-looking set of deck gear - is there anything special about the layout or function? From the fact that they are set on what look to be deck-houses, I'd expect the ships to carry quite a lot of outsized deck cargo.

Quoted

Originally posted by Hood
Very interesting, just the sort of vessel the RCN needs.

I like it, not sure whether the 5.5in are really needed on this design, a smaller DP weapon might have sufficed but its certainly an interesting ship.

The Atlantean polar exploration vessel Adventure has two twin 5.1" guns so the 5.5" gun wouldn't be too far outside the acceptable size range. I assume that the triples acctually sim as twins.

Quoted

Originally posted by BruceDuncan
The drawing of the Lockhart shows a rather interesting-looking set of deck gear - is there anything special about the layout or function? From the fact that they are set on what look to be deck-houses, I'd expect the ships to carry quite a lot of outsized deck cargo.

Nothing special; in fact, the arrangement is lifted off my Provider-class sketch. They are fairly large ships, so the prospect of them being used to move outsized deck cargo would not be too unusual.

Quoted

Originally posted by thesmilingassassin
The Atlantean polar exploration vessel Adventure has two twin 5.1" guns so the 5.5" gun wouldn't be too far outside the acceptable size range. I assume that the triples acctually sim as twins.

Yes, if you note the date on the original post, the actual ships were built some years ago (and are already plying the Northwest Passage), when I was still using the triple-as-twin-auto method for the early 5.5". It took me a while to get around to making a graphic for them I liked; the placeholder was the 1980s Polar 8 concept, which was entirely too modern.

I've reorganized and detailed the remainder of the RCN Auxilliary and RCMP's encyclopedia details;

RCN Auxilliaries





RCMP Maritime Division

Nice work, very interesting drawings.

Indeed, a most interesting set of vessels.

aaaawwweessoomme!

Nicely drawn, Shin.