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Sikorsky S-37


 Despite the S-35 tragedy, Capt. Rene Fonck decided to try again, in a new Sikorsky aircraft, the S-37 NX1283 Ville de Paris. Powered by two 500hp Jupiters, it cruised at 190km/h and had a designed range of over 6400km, which would have taken it to Paris with fuel to spare.

Tests at progressively increased loads included the overload weight needed for the transatlantic flight, but the planned attempt was abandoned after the Orteig prize had been won by Charles Lindbergh.

The S-37 was sold by Fonck's sponsors to American International Airways of Argentina as the Southern Star airliner for twenty passengers. During its delivery flight, begun on 30 June 1929, it became the first commercial transport to cross the 5700m Andes mountains, carrying eight people and a total useful load of 2300kg. Further flights over the Andes, between Buenos Aires and Santiago, became routine for several years.


Sikorsky S-37-1 AIA in Lima Perú R1283
First selling for $15,955, R1283 was modified as a sixteen passenger with 525hp P&W Hornet engines (the Jupiters went to S-37-B) for service in South America. It was scrapped by PAA in 1930.
The 1927 S-37-2 NX3698 (ATC 2-170) was built under a contract from Consolidated Co as their Model 12, for Army evaluation as five-place XP-496 bomber with two 525hp P&W R-1690 engines.
Sikorsky amended the suffix to "-B," but while in the service it never did get an official Army designation.
Sikorsky S-37-2 NR942M
It did not meet Consolidated's requirements, either, and was rebuilt in 1929 by Sikorsky from eight passenger to 21 passenger transport with two 675hp P&W Hornets, which were replaced by the Jupiters from the S-37-1.
Sikorsky S-37-B
Rebuilt again and re-registered in 1934 as NR942M, it crashed at sea in 1934.
Sikorsky S-37-2 NR942M
S-37-1 Guardian
Engines: 2 x Gnôme-Rhône Jupiter, 520hp
Wingspan upper: 100'0"
Wingspan lower: 58'0"
Length: 44'0"
Useful load: 7000 lb
Max speed: 135 mph
Cruise: 115 mph
Stall: 57 mph
Capacity: 20 pax
S-37-2 / S-37-B / Model 12
Engines: 2 x P&W Wasp, 500hp
Wingspan upper: 100'0"
Wingspan lower: 58'0"
Length: 45'6"
Useful load: 7000 lb
Max speed: 140 mph
Cruise: 120 mph
Stall: 53 mph
Ceiling: 15,000'
Capacity: 8 pax
S-37-2 / S-37-B / XP-496
Engines: 2 x P&W R-1690 Wasp, 525hp
Useful load: 6315 lb
Max speed: 108 mph
Stall: 57 mph
Range: 575 mi
Engines: 2 x P&W Hornets, 675hp
Capacity: 21 pax

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