Submarine
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Submarine 101
Wet Sub
Planing Wet Sub
Dry Ambient Sub
Submarine Yacht
Escape
Design Evolution
Cutting Aluminum
Building the Hull
Thrusters
Kort Nozzles
Battery & Chargers
Waterproofing
Engine & Jet Drive
Engine Tune-Up
Gearbox
Hull Cooler
Wet Manifold
Engine Mounts
Engine Box
Jet Pump Valve
Helm Controls
Ballast Sled
Landing Gear
Trim Tanks
Wiring Harnes
Hydrophone
Tow Truck
Rules of Thumb
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BCI GROUP NUMBERS, AND DIMENSIONAL SPECIFICATION
BCI

Group

Number

Maximum Overall Dimensions
Millimeters Inches
L W H L W H
PASSENGER CAR AND LIGHT COMMERCIAL_BATTERIES 12-VOLT (6 CELLS)
21 208 173 222 8 3/16 6 13/16 8 3/4
22F 241 175 211 9 1/2 6 7/8 8 5/16
22HF 241 175 229 9 1/2 6 7/8 9
22NF 240 140 227 9 7/16 5 1/2 8 15/16
22R 229 175 211 9 6 7/8 8 5/16
24 260 173 225 10 1/4 6 13/16 8 7/8
24F 273 173 229 10 3/4 6 13/16 9
24H 260 173 238 10 1/4 6 13/16 9 3/8
24R 260 173 229 10 1/4 6 13/16 9
24T 260 173 248 10 1/4 6 13/16 9 3/4
25 230 175 225 9 1/16 6 7/8 8 7/8
26 208 173 197 8 3/16 6 13/16 7 3/4
26R 208 173 197 8 3/16 6 13/16 7 3/4
27 306 173 225 12 1/16 6 13/16 8 7/8
27F 318 173 227 12 1/2 6 13/16 8 15/16
27H 298 173 235 11 3/4 6 13/16 9 1/4
29NF 330 140 227 13 5 1/2 8 15/16
33 338 173 238 13 5/16 6 13/16 9 3/8
34 260 173 200 10 1/4 6 13/16 7 7/8
34R 260 173 200 10 1/4 6 13/16 7 7/8
35 230 175 225 9 1/16 6 7/8 8 7/8
36R 263 183 206 10 3/8 7 1/4 8 1/8
40R 277 175 175 10 15/16 6 7/8 6 7/8
41 293 175 175 11 3/16 6 7/8 6 7/8
42 243 173 173 9 5/16 6 13/16 6 13/16
43 334 175 205 13 1/8 6 7/8 8 1/16
45 240 140 227 9 7/16 5 1/2 8 15/16
46 273 173 229 10 3/4 6 13/16 9
47 246 175 190 9 11/16 6 7/8 7 1/2
48 306 175 192 12 1/16 6 7/8 7 9/16
49 381 175 192 15 6 7/8 7 3/16
50 343 127 254 13 1/2 5 10
51 238 129 223 9 3/8 5 1/16 8 13/16
51R 238 129 223 9 3/8 5 1/16 8 13/16
52 186 147 210 7 5/16 5 13/16 8 1/4
53 330 119 210 13 4 11/16 8 1/4
54 186 154 212 7 5/16 6 1/16 8 3/8
55 218 154 212 8 5/8 6 1/16 8 3/8
56 254 154 212 10 6 1/16 8 3/8
57 205 183 177 8 1/16 7 3/16 6 15/16
58 255 183 177 10 1/16 7 3/16 6 15/16
58R 255 183 177 10 1/16 7 3/16 6 15/16
59 255 193 196 10 1/16 7 5/8 7 3/4
60 332 160 225 13 1/16 6 5/16 8 7/8
61 192 162 225 7 9/16 6 3/8 8 7/8
62 225 162 225 8 7/8 6 3/8 8 7/8
63 258 162 225 10 3/16 6 3/8 8 7/8
64 296 162 225 11 11/16 6 3/8 8 7/8
65 306 190 192 12 1/16 7 1/2 7 9/16
70 208 179 196 8 3/16 7 1/16 7 11/16
71 208 179 216 8 3/16 7 1/16 8 1/2
72 230 179 210 9 1/16 7 1/16 8 1/4
73 230 179 216 9 1/16 7 1/16 8 1/2
74 260 184 222 10 1/4 7 1/4 8 3/4
75 230 179 196 9 1/16 7 1/16 7 11/16
76 334 179 216 13 1/8 7 1/16 8 1/2
78 260 179 196 10 1/4 7 1/16 7 11/16
85 230 173 203 9 1/16 6 13/16 8
86 230 173 203 9 1/16 6 13/16 8
90 246 175 175 9 11/16 6 7/8 6 7/8
91 280 175 175 11 6 7/8 6 7/8
92 317 175 175 12 1/2 6 7/8 6 7/8
93 354 175 175 15 6 7/8 6 7/8
95R 394 175 190 15 9/16 6 7/8 7 1/2
96R 242 173 175 9 9/16 6 13/16 6 7/8
97R 252 175 190 9 15/16 6 7/8 7 1/2
98R 283 175 190 11 3/16 6 7/8 7 1/2
PASSENGER CAR AND LIGHT COMMERCIAL BATTERIES 6-VOLT(3 CELLS)
1 232 181 238 9 1/8 7 1/8 9 3/8
2 264 181 238 10 3/8 7 1/8 9 3/8
2E 492 105 232 19 7/16 4 1/8 9 1/8
2N 254 141 227 10 5 9/16 8 15/16
17HF 187 175 229 7 3/8 6 7/8 9
HEAVY-DUTY COMMERCIAL BATTERIES 12-VOLT (6 CELLS)
4D 527 222 250 20 3/4 8 3/4 9 7/8
6D 527 254 260 20 3/4 10 10 1/4
8D 527 283 250 20 3/4 11 1/8 9 7/8
28 261 173 240 10 5/16 6 13/16 9 7/16
29H 334 171 232 13 1/8 6 3/4 9 1/8 10
30H 343 173 235 13 1/2 6 13/16 9 1/4 10
31 330 173 240 13 6 13/18 9 7/16
             
ELECTRIC VEHICLE BATTERIES 6-VOLT (3CELLS)
GC2 264 183 270 10 3/8 7 3/16 10 5/8
GC2H 264 183 295 10 3/8 7 3/16 11 5/8