A participant in the Paper Wings World Finals 2019 competes in Salzburg, Austria.
If you've ever wanted to earn your wings ecologically, economically and quietly while breathing healthy Alpine air, read on, because you can.
Welcome to the paper plane world championship, which Austria hosts this weekend as the erstwhile pastime of the bored schoolkid morphs into a competitive fest with a world "title" at stake.
Competitors -- around 180 people from around the globe -- were able to travel ultra lightly to Salzburg with their "kit" composed of simple pieces of standard A4 size paper.
A classic tourist trip to the city would more normally entail a little Mozart or, for the less classically-inclined, a peek at the backdrop to the Sound of Music.
But, for one weekend only, competitors will be out to see who can launch their "fighter aircraft" the furthest or loop the loop most spectacularly or else stay in the air the longest
The winner of each category will take home a world title in a showdown which had its own qualifying tournament spread across 58 countries.
Most participants say they came to the event, organised by Austrian firm Red Bull, just "by chance" or "for fun".
But once engaged, the competition has really drawn them in, organisers say.
Paper, scissors... chuck
Ryan Naccarato, from Los Angeles, won the "acrobatic" category in 2012 and wears the calm mien of that successful experience as he prepares for his third event in a competition first held in 2006.
"You have to adapt to the parameters of each event: the quality of the paper, weight, air temperature, humidity," explains the 29-year-old, a big fan of origami.
That art of paper folding originated in Japan, which is where 54-year-old Emmei Shinichi -- the oldest competitor in a mainly male field -- comes from.
Counting down to the event, Shinichi was studiously putting the final touches to a complex model he hopes can remain airborne longer than anyone else's.
In the acrobatic category, all designs are allowed as long as the creation comprises nothing more than paper, some glue and a little judicious use of scissors to trim wing or fuselage.
The last edition in 2015 saw 53.22 metres sufficient to land the distance title for a flight time of 14.36 seconds.
All planes have to be made onsite in the organisers' Hangar7, home to historical planes and Formula One cars.
The venue has a view of the majestic Alps... as well as Salzburg airport's runways -- albeit too far away to have its airspace affected.
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