Nervous’ nine-year-old girls complete wing walk record attempt

Girls, 9, wing walk in record attempt 1:00

LONDON -- Soaring into the skies at speeds of up to 100 mph, a pair of British nine-year-old girls completed a remarkable wing walk Wednesday in the hope of setting a world record.

Nine-year-old cousins Rose Brewer, left, and Flame Brewer prepare before their attempt to become the world's youngest formation wing walkers. Matt Cardy / Getty Images

Cousins Flame Brewer and Rose Powell were strapped to a pair of Boeing Stearman biplanes and flown to heights of 500 ft over a private airfield in Cirencester, a town west of London.

"We were mostly screaming and waving," Rose Powell told NBC News' U.K. partner, ITV News. "And we did a little Superwoman pose."

"It was amazing. It was so cool looking up and seeing all the tiny houses."

Flame added that the flight had been, "a little bit scary" but when they'd started to fly it was, "really, really fun."

"I was excited and a bit nervous at the same time," she said.

Flame's brother, Tiger, is already a record-holder - he became the world’s youngest wing walker in 2009, at the age of eight.

The girls hope to become the youngest wing walkers to fly in formation, but officials from Guinness will need to verify the attempt before it can enter the record books.

Nine-year-old cousins Rose Brewer and Flame Brewer attempt to become the world's youngest formation wing walkers in Cirencester, England. Tim Ireland / Pool via Getty Images

Flame and Rose were raising money in the battle against Duchenne Muscular Dystrophy, which six-year-old friend Eli Crossley suffers from.

“It feels really nice to be doing something to help Eli,” Rose added. “It is dreadful that the older children like Eli get, the less able they become to do things that I take for granted.”

The cousins will become the third generation of their families to wing walk on planes owned by their grandfather Vic Norman, who leads and owns the Breitling Wingwalkers.

Norman will pilot one of of the planes.

Eli’s mom, Emily Crossley, said she was “honored” that the girls were helping to raise awareness of the disease that is caused by a mistake on the genetic code in a gene called dystrophin.

“For other young children to be moved to help our child and hundreds of thousands of boys like him is very humbling and we wish them all the very best,” she said.