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In 1928, Muntz co-founded Airwork Ltd with Nigel Norman. In 1929, the company opened Heston Aerodrome that was active in private, commercial and military aviation until its closure in 1947. In the same period, architect Graham Dawbarn joined the pair to form an airport consultancy firm called Norman, Muntz &amp; Dawbarn In 1932, he co-founded Misr Airwork SAE, with Talaat Harb Pasha, Banque Misr, Cairo. In 1933, he helped R.E. Grant Govan to found Indian National Airways Ltd. In 1937, he founded Alan Muntz &amp; Co. Ltd to develop the Pescara free-piston engine system and other inventions.