The Sikorsky S-40

 

S-40 in Flight Photo: Florida State Archives	S-40's over Miami - 1931 Photo: Florida State Archives	Pan American Airways S-40 1931 Photo: Florida State Archives
S-40 at Dinner Key 1931 - Miami, FL Photo: Florida State Archives	S-40 at Dinner Key Miami, FL Photo: Florida State Archives	S-40 at Dinner Key Miami, FL Photo: Florida State Archives
S-40 at Dinner Key Miami, FL Photo: Florida State Archives	S-40 at Dinner Key Miami, FL Photo: Florida State Archives	S-40 at Dinner Key Miami, FL Photo: Florida State Archives
S-40 at Dinner Key Miami, FL Photo: Florida State Archives	Boarding the S-40 at Dinner Key Miami, FL Photo: Florida State Archives	1931 Photo: Florida State Archives
S-40 Maintenance Photo: Florida State Archives	1930 Photo: Florida State Archives	Passengers boarding an S-40 Photo: Florida State Archives
The cabin of NC80V Photo: Florida State Archives	Pan American Airways Cabin - S-40 Photo: Florida State Archives	Pan American Airways Cabin - S-40 Photo: Florida State Archives
S-40 - Wind Tunnel Model New England Air Museum, July 2004	S-40 - Wind Tunnel Model New England Air Museum, July 2004	Sikorsky motor boat with hull model on boom
S-40 Hull Test Models

Span                                       114 ft 0 in
Chord                                            16 ft
Length (overall)                            76 ft 8 in
Hull Length                                 48 ft 0 in
Height (overall)                           23 ft 10 in
Angle of Incidence                           2-1/2 deg
Diehedral                                    1-1/2 deg
Airfoil                                           GS-1

Wing Area (incl ailerons and struts)        1875 sq ft
Ailerons                                     100 sq ft
Fin                                         49.5 sq ft
Rudder                                      57.5 sq ft
Stabilizers                                  149 sq ft
Elevators                                  104.5 sq ft

Gross Weight                                 34,000 lb
Empty Weight                                 24,748 lb
Useful Load                                   9,252 lb
Payload                                       5,902 lb
Seats                                               44

Wing Loading                             14.4 lb/sq ft
Power Loading                              14.76 lb/hp

High Speed                                   134.7 mph
Cruise Speed                                 115.0 mph
Landing Speed                                 65.0 mph

Ceiling                                      13,000 ft
Climb (at S.L.)                                712 fpm
Range                                           875 sm

Powerplant      4x P&W Hornet (575 hp * 1900 rpm each)
Fuel Capacity                                1040 gals
Oil Capacity                                   80 gals

Certification                                  ATC 454
Year of Introduction                              1931
Production                    3 (NC80V, NC81V, NC752V)
Cost                                          $139,000
Manufactured by               Sikorsky, Bridgeport, CT

Wing Construction: Dural Spars, channel ribs, fabric covered

Hull Construction: Dural, Alclad covered

Landing gear: Retractable, Sikorsky Brakes, Oleo-spring shock
              absorbers.

S-40 Names:
NC80V "American Clipper"
NC81V "Caribbean Clipper"
NC752V "Southern Clipper"

Sikorsky S-40-A Specifications

Useful Load                                  10,813 lb

Span                                       114 ft 0 in
Length (overall)                            76 ft 8 in
Hull Length                                 48 ft 0 in

High Speed                                     140 mph
Cruise Speed                                   120 mph
Landing Speed                                   65 mph

Range                                           900 sm

Powerplant    4x P&W Supercharged Hornet (660 hp each)

Certification                                  ATC 562
Year of Introduction                              1935
Production                                        None
Conversions                   3 (NC80V, NC81V, NC752V)