British-Belgian Mack Rutherford, 16, takes off from a tiny airport in Bulgaria for his attempt to become the youngest person to fly solo around the world -- after his elder sister managed her own inspirational feat just months ago. Piloting the same Shark ultralight plane his sister used for her journey, the teenager aims to circumnavigate the globe alone and beat Briton Travis Ludlow's same achievement set when he was 18 years and 150 days. Rutherford's sister Zara, 19, became the youngest female to fly solo around the world earlier this year after she spent just over five months navigating the Earth's skies and inspired her brother to follow in her steps. IMAGES AND SOUNDBITES