Show Big Plane Makes l Test By Radio Control ALAMEDA Cal April 11 OP PIts P- P Its final test flight completed the Pan American Airways seaplane Pioneer Clipper rested at its mooring mooring- today with the trail blazing flight over a transpacific air route to China expected to start next Week On Its Us test yesterday the big four motored craft was flown blind through clouds and fog off the California California Cali Cali- fornia coast under radio guidance Radio station officials said the entire entire en en- tire flight was charted and directed from land the thc crew having no idea of or the course to be followed when the plane took off |