Expanding on this post regarding 100 and 250lb bombs on city squares - what about the odd ball 50/60 and 100kg bombs when used on these?... would a box of three bombers dropping a single 100kg, or two 50/60kg bombs have the same effect as the 100x2 amd 250x1 or will they fall short?... (particlarly the 100kgx1 option, that seems a shame if it would come up that short.... i really dont get how the "313lbs [= 1 250lbs bombs]" bit works, but I know it is what it is).
313lbs is the exact aboumt of damage a factory building takes to be destroyed, as can be seen in the 'object settings' in the arena. And this is also the exact amount of damage a 250lbs bomb does inflict.
This is because only the 1,000 lbs GP bomb has actually 1,000lbs damage rating. The smaller bombs are more effective compared to their weight (the more the smaller they are), while larger bombs are less effective (the less the bigger it is):
GP bombs
4000lbs - 3125lbs of damage
2000lbs - 1718lbs of damage
1000lbs - 1000lbs of damage
500lbs - 562lbs of damage
250lbs - 312lbs of damage
100lbs - 156lbs of damage.
As for your question on the 100kg bombs on the city square - They fall just short of it, one drop (3x100kg) is not enough for a city block (Which is a pity, would have given the Ki-67 some interesting strat capability)
100kg - ~275lbs of damage (have to retest it to confirm exact value). I haven't checked the 60kg yet, I would expect between 171 and 205lbs, probably the latter.