1. Small Helicopters:
- Robinson R22: Approximately 53 gallons (200 liters) of fuel.
- Airbus Helicopters H125 (AS350): Approximately 110 gallons (416 liters) of fuel.
2. Medium-Sized Helicopters:
- Leonardo AW109 GrandNew: Approximately 250 gallons (946 liters) of fuel.
- Sikorsky S-76: Approximately 365 gallons (1382 liters) of fuel.
3. Heavy-Lift Helicopters:
- Boeing CH-47 Chinook: Approximately 1,260 gallons (4,773 liters) of fuel.
- Mil Mi-26: Approximately 2,061 gallons (7,800 liters) of fuel.
It's worth noting that these are just rough estimates, and the actual fuel capacity of a helicopter can vary based on specific configurations and modifications. Helicopters may have additional fuel tanks or auxiliary fuel systems to increase their range or endurance during long missions.