bottom line, 37,500lbs.
if you are able to put 37,500 lbs on the large white building at the HQ, the radar will die.
Dropping bombs NEAR the white building, or KINDA hitting close to the white building just won't cut it.
IF you PUT 37,500lbs of bombs on the white buiilding, and 37,500lbs of bombs HIT said building, that HQ is gonna die.
No other factors but aim. Either you hit it or not.
Reminds me of a thread I read once where a guy was SCREAMING in this post about how ack was porked, and how he emptied a gazillion round of .50cal ammo into an ack and it wouldn't die. He even filmed it.
HT reviewed the film, and after doing some HTC magic, found that only a handful of rounds actually hit the field ack. The guy sprayed a ton, came near lots, ALMOST hit it bunches, but only a couple rounds actually "hit" the ack.
This is the exact same situation. You can have 100 lanc's dropping 420,000lbs worth of eggs. If you don't hit the target, it won't get damaged.
Bottom line.