Stephen's bubblecar scaled down worked out at a length of 8ft!
Thats y im not building it any more!
for a 442, Each coah would proably work out like this:
3 1/2" gauge: Each coach would be about 4 foot long but it would be uncomfortable to ride on it at both gourn level and rasied!
5": Each coach would be about 6 foot long, also not that comfortable for ride on at ground level noramlly caohes are made over scale so you can ride on them!
7 1/4" gauge: Each coach would be about 9 foot long, now if you have 5 coaches thats a 45 foot train, good luck with finding soem wherer to keep that! although its mroe comfortabel at ride on at that scale!!