[thatguy96]

What I was going with was that the Napalm 500 was close to the BLU-1/B which is a "750 lb" canister with between 90-100 gallons of naplam. The Napalm 250 was, as you said, the 500 lb canisters with between 60-70 gallons rough appoximation. I then created the AN/M47A3, by tweaking numbers out of numbers from a 250 lb bomb (seeing as the M47's case is thicker than later canisters) and also working from the napalm numbers.