What is the minimum recommended HLZ size?

What is the minimum recommended HLZ size?

• A. 50x50
• B. 100x100
• C. 150x150
• D. 200x200

Answer: (B)

HLZ size is driven by the need for safe clearance around the rotor disc during landing and takeoff, including room for approach, descent, and wind drift. A 100 by 100 feet area provides a practical safety buffer for most helicopters, accommodating the rotor diameter plus space to keep people, equipment, and obstacles clear from the rotor arc and downwash. It balances safety with practicality as the minimum standard. Smaller zones would not leave enough margin for safe maneuvers, while larger zones are helpful when the helicopter has a bigger rotor, there are obstacles nearby, or winds are unfavorable.

HLZ size is driven by the need for safe clearance around the rotor disc during landing and takeoff, including room for approach, descent, and wind drift. A 100 by 100 feet area provides a practical safety buffer for most helicopters, accommodating the rotor diameter plus space to keep people, equipment, and obstacles clear from the rotor arc and downwash. It balances safety with practicality as the minimum standard. Smaller zones would not leave enough margin for safe maneuvers, while larger zones are helpful when the helicopter has a bigger rotor, there are obstacles nearby, or winds are unfavorable.