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Italy's SIAI Marchetti SM.75; Savoia-Marchetti SM.75 Marsupiale (marsupial) transport

Photos

  • Savoia-Marchetti SM.75 Marsupiale (marsupial) transport
  • Savoia-Marchetti SM.75 Marsupiale (marsupial) transport
  • Savoia-Marchetti SM.87 floatplane transport

Design

The SIAI Marchetti SM.75 was a civilian transport and was very successful commercially and was designed by Alessandro Marchetti in 1935. It was originally to be a 24 - 30 passenger aircraft that would replace the SM.73P. The design of the SM.75 eventually led to the Savoia-Marchetti SM.79 bomber.

The SM.75 was made from a composite structure and covering.

The passenger cabin had heating and ventilation.

Landing Gear

The SM.75 was the first aircraft designed by Marchetti that had retractable landing gear.

Production

  • SIAI Marchetti SM.75:
    • Manufacturer: SIAI Marchetti
  • Savoia-Marchetti SM.87:
    • Production: 1938 - ?

Variants

  • SIAI Marchetti SM.75:
  • SIAI Marchetti SM.87: Float plane version of the SM.75.
  • SIAI Marchetti SM.87: Float plane version of the SM.75 with Pratt & Whitney engines intended for use in Argentina.

Usage

Civilian Use

In 1938 the Ala Littoria first started using the SM.75s.

Pilots N. Prota and G. Bertocco flew a SM.75 at a speed record of 207 mph over a 621 mile course and 205 mph over a 1,242 mile course while carrying 22,000 lb on January 9, 1939.

Military Use

When World War II broke out the Italian Air Force took over the civilian aircraft.

Some of the transports were used as bombers.

In June 1940 thirteen SM.75s were taken over from civilian use and assigned to the 601a - 603a Squadriglie of the 147° Gruppo "T" at Littorio.

Sole Survivor

In September 1943 the only remaining SM.87 was flown to join the Co-Belligerent Air Force.

After World War II

Some of the SM. 75s survived World War II and remained in use until 1949.

Specifications

  SM.75 - Alfa Engines
Type Transport
Crew 3, 4 - 5
Passengers 18, 24
Engine (Type) 3: Alfa Romeo 126 RC 34
Cylinders Radial 9
HP 750 each
Cooling Air
Dimensions  
Span 97' 5"
Length 70' 10", 70' 10 3/16", 73' 1"
Height 16' 8.75", 16' 9", 17' 4"
Wing area 1,276.1 sq ft
Weight  
Empty 20,900 lb
Loaded 28,700 lb, 31,900 lb, 32,000 lb
Performance  
Speed 230 mph
Speed at 10,070' 229 mph
Speed at 13,120' 225 mph
Speed - Cruising 202 mph
Climb to 13,120' 18 minutes
Service Ceiling 20,500', 22,960'
Range 875 miles, 1,070 miles, 1,416 miles
Armament 1: machine gun
  SM.75 - Piaggio Engines
Type Transport
Passengers 24
Engine (Type) 3: Piaggio P.XI RC/40
Cylinders Radial 14
HP 1,000 each
Cooling Air
Dimensions  
Span 97' 5"
Length 70' 10 3/16"
Height 16' 8.75"
Wing area 1,276.1 sq ft
Weight  
Empty 21,560 lb
Loaded 32,560 lb
Performance  
Speed 245 mph
Speed - Cruising 214 mph
Climb to 13,120' 19 minutes
Service Ceiling 29,520'
Range 621 miles
  SM.87 - Alfa Engines
Type Float Plane Transport
Passengers 24
Engine (Type) 3: Alfa Romeo 135 R.C.32
Cylinders Radial 18
HP 1,350 each
Dimensions  
Span 97' 5"
Length 70' 10 3/16"
Height 19' 4 7/8"
Weight  
Empty 26,400 lb
Loaded 37,400 lb
Performance  
Speed 255 mph
Speed - Cruising at 11,480' 224 mph
Climb to 13,120' 20 minutes
Service Ceiling 23,945'
Service Ceiling - with two engines 15,745'
  SM.87 - Pratt & Whitney engines
Type Float Plane Transport
Passengers 24
Engine (Type) 3: Pratt & Whitney SC3G
Cylinders Radial 14
HP 1,050 each
Dimensions  
Span 97' 5"
Length 70' 10 3/16"
Height 19' 4 7/8"
Weight  
Empty 23,100 lb
Loaded 31,240 lb
Performance  
Speed at 12,465' 227 mph
Speed - Cruising 193 mph
Climb to 13,120' 23 minutes

Sources:

  1. World War II Airplanes Volume 1, Enzo Angelucci, Paolo Matricardi, 1976
  2. Aeronautics Aircraft Spotters' Handbook, Ensign L. C. Guthman, 1943
  3. Italian Civil and Military Aircraft 1930-1945, Jonathan Thompson, 1963
20th Century American Military History Crucial Site