A helicopter can weigh anywhere from 1370 pounds for a very small (Robinson R22 Beta II) to over 33,300 pounds (Sikorsky CH-53K). ~ The Robinson R22 Beta II can lift around 400 pounds and has 131 hp.
~ The Sikorsky Ch-53K can lift over 36,000 punds and has 18,436 hp.
a helicopter that lifts heavy objects
It is a military heavy cargo helicopter
7.6 tonnes
An aircrane is a helicopter with the ability to lift heavy items.
300 Pounds
It has a very extreme effect, if it is too heavy, it will not rise.
Sikorsky CH-53 Super Stallion is the largest US production helicopter.
The alliteration for helicopters could be higher helicopters or heavy helicopters
For lifting heavy objects that would be awkward or hard for a regular crane to do.
make your blades out of carbon fibre
No, tanks are too heavy to be transported by a helicopter. Some Light Armored Vehicles can be transported, but not a tank. There are a couple of commercial helicopters that have the lifting power to move a tank, but it is not military and it is lifted externally, not internally.
Marine Heavy Helicopter Squadron 361 had to bivouac in a field next to the airstrip during the military exercise.