Conversation so far:
What is the H-4 hercules?
HK-1 Hercules flying boat.
What was the use of the flying boat?
use during World War II to transport troops and equipment across the Atlantic as an alternative to seagoing troop transport ships that were vulnerable.
How much did the hercules cost to make?
CANNOTANSWER.

Question: Was the hercules used for many missions?
Self-contained rewrite: Was the Howard Hughes' H-4 Hercules used for many missions?