An earlier flying boat design by John was this Grumman Albatros powered by two 4-stroke engines.  Another fantastic flying boat design.
Bill Foster's recent post on the HEFA website brought back some memories of the fantastic float flies held at John Hawkin's residence in Chezzetcook, Nova Scotia.

John is a talented model designer and builder and here are some photos of his "Emily", a japanese four engined flying boat.

John drew the plans for this rather large machine and built and flew it successully powered by four 4-stroke engines.