Which 'Flying Twenty'? The Standard Motor Car Company model (the 'Flying Standard' models) called the 'Flying Twenty' because of its 20hp engine (the other two were the 'Flying Twelve' and 'Flying Sixteen')? The planing keelboat sailboat design by Uffa Fox (companion design to his 'Flying Fifteen' and 'Flying Twenty-Five')? Or the flying club in San Jose? Or the pay advance recruits received from which they were expected to buy all the toiletries they needed prior to entering basic training?