Referee's report by Ernest Frederick Relf, on a paper 'The general motion of the aeroplane' by S Brodetsky Sectional Committee: Engineering Recommended for publication in the 'Proceedings of the Royal Society of London'. The treatment of the problem is new, but 'it is difficult to see when and how it will develop into a form useful in prectice but this does not detract from its value as an indication of a new way of treating aeroplane motions'. The section on airscrew thrust is the least convincing. Refers to work of Frederick William Lanchester. Suggests adding a summary. [Published in the Philosophical Transactions of the Royal Society] Endorsed on verso as received 27 February 1939. [February 1939]