“A Cub climbing to FL350?! — yes, really. Airline crews couldn’t believe it either. Listen to hear the LIVE ATC recording! On October 28, 2025, the CubCrafters Carbon Cub UL, piloted by Jon Kotwicki (@fly8ma), climbed to 37,609 ft (11,460 m / 7.12 mi/ pressure altitude 35,790 ft) over the California coast — setting an unofficial world altitude record for Cub-type aircraft. That record hadn’t been surpassed since 1951, when Caro Bayley reached new heights in a PA-18 Super Cub over Miami, FL, earn