Hello, I was wondering if anyone knew the complete specifications for an aircraft to be able to qualify for Red Bull Air Race. I know nothing about it but deceded to try to build a plane with correct spec in the game.

The plane turned out good, but I really struggled to find spec design rules.
I have found the standard propeller and engine specs, also the max wingspan. I also believe fixed wheels are compulsory, but everything else has been guesswork.

Anyone know more? Or is anyone else tried building air race planes?