Mil V-12, with a gross weight of 105,000 kg. More information can be found at the related link posted at the bottom.
what is the name of the largest pyramid ever built
The Russian built Mi-26.
the titanic was the largest ship ever built in 1911
If you mean "first" , i beleive that was the Sikorsky R4.
The massive Islamic Cultural Center in Madrid is the largest mosque ever built in Spain.
The Russian Mil Mi-26 "Halo" is the heaviest helicopter with an empty weight of 28,200 kg (62,170 lb) whereas the American Boeing CH-47 Chinook is only 10,185 kg (23,400 lb).For Western forces the CH-47 would be the heaviest helicopter but worldwide the Mi-26 wins hands down.The Mil V-12 ("Homer") would have been the largest helicopter ever built, if it had actually been built.
England
Airbus A380
The Russians have built the 2 largest helicopters. One of them, the Mil26 T is currently working in northern BC doing logging in remote areas.
yes on their time....
Saturn V
Igor Sikorski built the first practical helicopter