Hello Jasper,
Here is a combination formula from TNE and T4.
Length as determined using TNE:
50-dton Modular cutter
Cutter with module = 50 dtons;
Hull Rate of 50 has Base Length of 11.2 TNE p. 11.
Length Mod for a SL Cylinder Hull is 2 TNE p. 12.
Total Length = 11.2 x 2 = 22.4 m
I think that in T4 the base length of the hull is determined by using volume to get diameter or length:
T4 p. 102 Volume of 700 m^3 = 50 dtons = base diameter or length of 11 m for the complete package.
</font><blockquote>code:</font><hr /><pre style="font-size:x-small; font-family: monospace;">Hull Shape Mods Table T4 p. 104
Length Width Height
Long Cylinder (3.5:1) 2 .57 .57</pre>[/QUOTE]TNE/T4
Cutter w/module
Total Length = 11.2 * 2 = 22.4 m
Width & Height = 22.4 * .57 = 12.77 m
</font><blockquote>code:</font><hr /><pre style="font-size:x-small; font-family: monospace;">Cutter w/module
Length x Width X Height
22.4 m 12.77 m 12.77 m</pre>[/QUOTE]T4
Cutter w/module
Total Length = 11 * 2 = 22 m
Width & Height = 22 * .57 = 12.54 m
</font><blockquote>code:</font><hr /><pre style="font-size:x-small; font-family: monospace;">Cutter w/module
Length x Width X Height
22 m 12.54 m 12.54 m</pre>[/QUOTE]Module without cutter
Module = 30 dtons;
Hull Rate of 30 has Base Length of 9.2 TNE p. 11.
Length Mod for a SL Cylinder Hull is 2 TNE p. 12.
Total Length = 9.2 x 2 = 18.4 m
TNE/T4 Module
</font><blockquote>code:</font><hr /><pre style="font-size:x-small; font-family: monospace;">Length x Width X Height
18.4 m 12.77 m 12.77 m</pre>[/QUOTE]T4 p. 102 Volume of 420 m^3 = 30 dtons = base diameter or length of 9.29 m for the module.
Total Length = 9.29 * 2 = 18.58 m
Width & Height = 18.58 * .57 = 10.59 m
T4 Module
</font><blockquote>code:</font><hr /><pre style="font-size:x-small; font-family: monospace;">Length x Width X Height
18.58 m 10.59 m 10.59 m</pre>[/QUOTE]Width & Height of the T4 module should be equal to that of the Cutter.
The above is based on materials I have readily available and my understanding of the two systems. Which could be out to lunch
.
GURPS Traveller: Modular Cutter pp. 28-29
50-dton cutter dimensions: 21 ft x 21 ft x 72 ft or 6.4 m x 6.4 m x 21.95 m
Module dimensions: 21 ft x 21 ft x 42 ft or 6.4 m x 6.4 m x 12.8 m
Hope that the above helps you.