Professional engineer who worked at the Royal Aeronautical Establishment and contributed to books written by J.F. Clay, the Newcomen Society Transactions and demonstrated his credentials in a Backtrack letter on Stanier's "thoughts" on steam turbine locomotives.
Newcomen Society contributions:
Quellmalz, J. Thermodynamic aspects of the design of German Standard steam locomotives: compound vs. simple expansion. 165-198. Discussion: 199-202