He not only flew as test pilot for many experimental planes such as the Douglas A2D Skyshark but also flew drop planes such as the B-29 Superfortress for other flight tests such as carrying the Douglas D-558-2 Skyrocket piloted by Bill Bridgeman.
Born in Willows, California in 1921, he learned to fly crop dusting planes at the Nolta Air Service.
Jansen flew B-24 Liberators from England during World War II including the famous Ploesti Raid.
After the war he Joined Douglas Aircraft Co. as a test pilot, flying many aircraft including the A2D, A3D, B-66 and the B-29 drop plane for the rocket powered Douglas D-558-II Skyrocket, which set an altitude record of over 79,000 ft. at a speed of Mach 1.4.
After his death in the 1990s he was honored with a Plaque in Lancaster, California near Edwards Air Force Base.