The S.73P was a long-range commercial transport powered by three 522kW Piaggio Stella IXRC or other engines of similar output. Accommodation provided for 18 passengers. Deliveries to commercial operators began in 1935; many were impressed by the Regia Aeronautica as troop transports during World War II, although a specific military version was produced as the S.73M.
| ENGINE||3 x Alfa Romeo 126 RC.10, 597kW|
| Take-off weight||10800 kg||23810 lb|
| Loaded weight||7300 kg||16094 lb|
| Wingspan||24.0 m||79 ft 9 in|
| Length||18.37 m||60 ft 3 in|
| Height||4.45 m||15 ft 7 in|
| Wing area||92.2 m2||992.43 sq ft|
| Max. speed||325 km/h||202 mph|
| Ceiling||7000 m||22950 ft|
| Range||1000 km||621 miles|
|A three-view drawing (680 x 908)|
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