World of Warplanes closed beta will start May 31, 2012.
Since Global Alpha launch on February 23 this year, World of Warplanes has got more than 600,000 applications for global alpha from players around the world, with 100,000 coming in first 24 hours. Thousands of players have been granted access to World of Warplanes alpha version, and the army of test pilots will be increased drastically once the game enters Closed Beta.
Applications made during global alpha stage will be eligible for priority processing in closed beta.
You can apply here:
NA - https://na.worldofwarplanes.com/ga/new/
EU - https://eu.worldofwarplanes.com/ga/new/