Morning from the Pacific Northwest,

I've run into another bump in Donald McKinney's edited version of A MegaTraveller Starship Design Example.

I was able to match all the basic life support values using the total hull volume of 1,012,500. I did not match the Extended Life Support volume of -3,030 kl, but I feel this is errata and should be -3,037.5.

In the edited version Donald included a design pointer from the Traveller Q&A of the Travellers' Digest Number 21 page 28. The pointer concerns recalculating the basic and extended life support systems by excluding the Regal's fuel tankage. In the Locomotion step the Jump fuel tankage was calculated as 253,125 kl and per the article "Let's look at what happens when we remove the life support from the Jump fuel space:"

To verify the numbers I did the following:

Total Hull Volume = 1,012,500 kl

Jump Fuel Tankage Volume = 253,125

Modified Hull Volume = 1,012,500 - 253,125 = 759,375

Basic Life Support Power = 0.001 x 759,375 = 759.375 MW the listed power is 672.08.

Extended Life Support Power = 0.001 x 759,375 = 759.375 MW the listed power is 1,344.16.

Taking the listed basic life support power of 672.08 I determined the modified hull volume as 672,080 and the the fuel tankage volume as being 1,012,500 - 672,080 = 340,420 kl.

Taking the listed extended life support power of 1,344.16 I determined the modified hull volume as 1,344,160 and the the fuel tankage volume as being 1,012,500 - 1,344,160 = -331,660 kl.

The value of 340,420 kl matches the power plant fuel tankage calculated if the Fuel and Miscellaneous section. Unfortunately, the extended life support power requirement does not match.

Did I correctly remove the Jump fuel tankage from the total hull volume to calculate the required basic and extended life support power requirements and if I did the process correctly is this in need of errata?

Tom Rux