Fearless American skydiver Luke Aikins will leap out of a plane at 25,000 feet without a parachute and attempt to land safely in the California desert in a live television broadcast dubbed "Heaven Sent".

The married 42 year-old third-generation skydiver, who has made about 18,000 jumps in his 25-year career, will leap on July 30 and land on his back on a device which organisers would only describe as a "slide".

"I'm going to do something that's definitely out there and most people in the world will think is crazy," Aikins said on Monday.

Aikins, who claims it will be a world record for jumping without a parachute, previously worked with Felix Baumgartner on the Austrian daredevil's 2012 record skydive which started 38 km above earth.-Reuters