Anyway, my latest discovery is a 1958 volume entitled
PRIESTS' PROBLEMSAmongst the gems in this book is the question: Would a priest enjoying a portable altar indult, which included celebration in a ship, violate any grave law by celebrating Mass in an aeroplane? In the course of the answer we discover: There is no express prohibition against celebrating in aeroplanes. On the contrary, it was expressly permitted by papal indult as long ago as 1936, on the voyage of the dirigible Hindenburg from Friedrichschafen to New York, and the celebrant Fr. Schulte O.M.I., is said to have been the first priest to celebrate in the air..
Being answers to a large variety of questions on points of moral, canonical, liturgical and rubrical interest
by the late
CANON E.J. MAHONEY, D.D.
Selected and edited by
REV. L.L. McREAVY, J.C.D., M.A
One presumes that last clause excludes St. Joseph of Cupertino.
Now availible on the Vatican website are the pictures from the Pope's Corpus Christi procession. If you look closely you might see Zadok in this shot. :)