The Julia was intended to be usable several times, not just once like the Natter, thus it should take off from this ramp and land on skids. Without landing gear, it could be smaller and developed more quickly.
According to a Heinkel development engineer, 1 prototype of the Julia was tested in tow, similar to the Bachem Natter, but it was never used.
This was done at Heinkel in Vienna-Schwecht and the fuselage was built in wood by carpenters.