https://en.wikipedia.org/wiki/De_Lackner_HZ-1_Aerocycle
Perfect event vehicle, nothing else to say.
Specifications on Wikipedia:
Crew: 1 pilot
Height: 2.1m
Empty wgt: 78kg
Gross wgt: 206kg
Fuel capacity: 1 singular U.S Gallon
Main rotor diameter: 2 × 15 ft (4.6 m)
Maximum speed: 75 mph (121 km/h, 65 kn)
Cruise speed: 55 mph (89 km/h, 48 kn)
Range: 15 mi (24 km, 13 nmi)
Endurance: 45 minutes
Service ceiling: 5,000 ft (1,500 m)
Yes, it is amphibious. Here's a 1 minute archive vid: https://www.youtube.com/watch?v=1oYS_5SgU_0
The HZ-1 Aerocycle, also known as the YHO-2 and by the manufacturer's designation DH-5 Aerocycle, was an American one-man "personal helicopter" developed by de Lackner Helicopters in the mid-1950s. Intended to be operated by inexperienced pilots with a minimum of 20 minutes of instruction, the HZ-1 was expected to become a standard reconnaissan...
De Lackner HZ-1 Aerocycle, also known as the YHO-2 and by the manufacturer's designation DH-4 Heli-Vector




