Video: Nine-year-olds break wingwalking record Two nine-year-old schoolgirls have become the world's youngest formation wingwalkers. Reaching speeds of up to 100mph and flying only yards apart, Rose Powell and Flame Brewer took to the skies on two of their grandfather's vintage biplanes over Gloucestershire. They became the third generation of their families to wingwalk on the Boeing Stearman aircraft when they took off from RFC Rendcomb airfield, near Cirencester. The cousins, both from London, were inspired to undertake the feat by the plight of their six-year-old friend Eli Crossley, who suffers from Duchenne Muscular Dystrophy. His parents have set up the Duchenne Children's Trust to raise money to research a treatment or cure in time to save Eli's life. The girls' grandfather, Vic Norman, was at the controls of Rose's plane while Martyn Carrington, director of flying at Aerosuperbatics Ltd, piloted Flame's aircraft.