The Hall PH was an American flying boat of the 1930s. It was a twin-engined biplane, developed from the Naval Aircraft Factory PN and could hence trace its lineage back to the Felixstowe flying boats
Hall PH-3
XPH-1 prototype in flight. Note the open pilots cockpit.
The Supermarine Scapa was a British general reconnaissance flying boat built by Supermarine that was used by the Royal Air Force between 1935 and 1939. It was developed from the Southampton and formed
Hall PH
…Saro London Supermarine Scapa Supermarine Stranraer…
A Supermarine Scapa at the MAEE at Felixstowe, in 1933
Cut-away illustration of the Scarpa from Flight magazine (June 1935)