Sikorsky S-40


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Sikorsky S-40

When built the Sikorsky S-40 was the largest amphibian in the world. Powered by four 428kW Pratt & Whitney Hornet engines, it had accommodation for 28 passengers and the added luxury of a smoking room with three chairs. It entered service with Pan American Airways on 19 November 1931.

Sikorsky S-40A three-view drawing (734 x 912)

 ENGINE4 x Pratt & WHitney "Hornet B", 425kW
  Take-off weight15400 kg33951 lb
  Wingspan34.8 m114 ft 2 in
  Length23.4 m77 ft 9 in
  Height7.3 m24 ft 11 in
  Wing area174.0 m21872.92 sq ft
  Max. speed210 km/h130 mph
  Cruise speed185 km/h115 mph
  Ceiling5550 m18200 ft
  Range w/max.fuel925 km575 miles

Sikorsky S-40

Barry, 30.03.2016 12:02

Only three were built NC80V Caribbean Clipper NC81V Amrican Clipper and NC752V Southern Clipper.


Don Mitchell, e-mail, 06.08.2015 09:44

Little known fact, the stress analyst for the S-40 was Karel Jan Bossart, who years later designed the Atlas missile.


Dave Paulley, e-mail, 05.07.2012 21:56

In the May 1999 issue of Airpower magazine, page 50 a photo is shown of a S-40 loading at Oakland,CA for a flight to Honolulu. These aircraft were flown mainly in the Caribbean so this seems to me to be a special flight. Does anyone have info on the flight or flights to and from Hawaii like dates etc: Would appreciate any help. Thanks, Dave Paulley


John Britton, e-mail, 09.06.2012 15:17

There is a book out, Pan Am and it's planes (R.E.G. Davies), that gives illustrations; that is, if you can find it. It was available on Amazon a couple of years ago. If memory serves, Clippers of that era were bare aluminum, aluminum dope on fabric controls, black bottom, balck or dk blue anti-glare, and international orange recognition on the top of the wing. Same for S-42 and M-130. My father flew all 3. Photo above looks llike dark leading edges, but that is probably shadow.


CHUCK SAVA, e-mail, 06.05.2012 12:28

it would appear that not all of the s-40s were amphibian. is this true as i cannot see any wheels on one of them. Secondly. since I am building a model of one I would like to know where or how to find out the color scheme used on the first machine especially on the upper surface of the wing,


wanshan, 20.06.2011 14:04

what type of engine used in the aircraft.pls explain about engine specification


Roy Lindberg, e-mail, 19.06.2011 16:09

As the note above says the engines in this aircraft were Pratt & Whitney Hornet B , 575 HP. These were 9 cylinder radial, air cooled. Bore stroke 6.3 (159) x 6.8 (171), displacement 1860 cu. inches


saravana, e-mail, 09.03.2010 15:52

what type of engine used in the aircraft.pls explain about engine specification


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