Fand of model aeroplanes are often perceived as "a bunch of old silly buggers playing with balsa wood and tissue," but Bill DeRenzy says the world he flies in is much more than that.
The landscape is changing as the sport evolves, with high-spec multi-rotor aircraft "taking off like crazy" as pilots wear goggles and utilise on-board cameras and touch-screen transmitters to fly.
Endless YouTube footage has captured the global phenomenon which shows miniature versions of the aircraft tearing through forestry and zooming across urban terrain.
Electric aeroplanes have also grown in popularity, Bill says, as batteries become smaller and lighter and costs reduce with some good foam replicas available from $200.
The Tauranga Model Aircraft Club president and former New Zealand Airforce engineer says the new technologies and composite materials are revolutionary and there is no doubt about that. But his heart lies with gliders.