“China Shipbuilding Industry Corp has never announced the angle, but the blueprint for the Liaoning shows that the angle on its ramp is 14 degrees,” Beijing-based naval expert Li Jie said.
“But based on the thrust of the J-15 fighter jet, many experts believed the ramp angle on the Shandong would have to be reduced a little,” he said.
Hong Kong-based military commentator Liang Guoliang said the ski-jump angle on the Liaoning – a Soviet-designed Kuznetsov-class carrier China bought from Ukraine in 1998 – was designed to accommodate Russian Su-33 Flanker fighters.
“Four options for the ski-jump ramp angle – eight, 12, 14 and 16 degrees – were tested,” Liang said. “More powerful aircraft need a lower angle, and it’s a fact that China’s J-15 is more powerful than the Su-33.”
The Chinese r pragmatic & don't do anything more complicated than necessary, so it's a safe bet the rump on the CV-17 has lower angle.