The Do 24 ATT was a modified Do 24T, still recognisable by the old fin shape. The Do 24/72 would
have been newbuilt aircraft, based on the Do 24T, but with several modifications.
From FlugRevue 4/1976:
Modifications: Longer fuselage (24,35m against 21,95m) with headroom in the middle aisle, primary structure
made of NC-milled parts. Wings with longer span (28,00m against 27,00m) and larger wing-area (110 m² against
108m²), higher aspect ratio (7,12 against 6,75) and less taper, central wing using the NACA 23016 and outer wings
the NACA 4412, pneumatical de-icing. The Do 24/72 would have been orderable as a pure flying boat, too, but weight
penalty for the landing gear was estimated as about 500 kg only.
Proposed engines were the PT 6A-50 or the Avco-Lycoming T 53-21A at first, but later only the PT 6A was mentioned.
To prevebt water-ingestion a special intake was designed (see picture)
