We didn’t build anything in the dinky ranges pre-war, so I used 1943 N3 data for the US. Be careful, though, because there were 3 different types of N3s; recip-oil, recip-coal, and diesel. They were way different from one another.
Included the measured hold capacity from the US builder’s records, for both bale and grain cubic. I expressed it in register tons of 100 cubic feet. If you need or want measurement tons, just multiply by 2.5
There are two design differences between Japanese and US designs; one minor and one major. The minor one is that the Japanese prewar diesel installations tended to be heavier than average, thereby adding some extra poundage onto light ship displacement. That’s why the pre-war Japanese vessels required a larger load displacement for a given deadweight.
The major one is the difference between the moulded load draft and the depth at height of weather deck: ours were about 15’ for C2s and C3s, Japanese were about 12’ for contemporary Yamashita and Nippon designs. A USMC C2 or C3 design could overload by 16-17% and still retain the reserve buoyancy of a contemporary Yusen-S or Yusen-N type vessel.
Have fun!
