|Role||Light utility and trainer helicopter|
|First flight||18 December 2008|
|Developed from||Schweizer S-333|
|Variants||MQ-8 Fire Scout|
The Sikorsky S-434 is a light, turbine-powered helicopter. The S-434 is an improved development of the Schweizer S-333.
Design and development
The prototype S-434 first flew on 18 December 2008 at Horseheads, New York. The S-434 evolved from the S-333, and has many features developed for the MQ-8 Fire Scout. It shares its cockpit layout with the S-333, which gives the crew very good visual capacities and handling characteristics.
- based on improvements developed for the MQ-8B; powered by one Rolls-Royce 250-C20W turboshaft engine of 320 shp.
Sikorsky® Schweizer™ S‑434™ Helicopter 
height overall, extended: 11.00 ft (3.35 m)
height overall, compressed: 10.49 ft (3.20 m)
length overall: 30.83 ft (9.40 m)
landing gear tread width, extended: 6.29 ft (1.92 m)
landing gear tread width, compressed: 7.00 ft (2.13 m)
cabin width at seat: 67.6 in (172 cm)
cabin height at seat: 53.3 in (135 cm)
fuel capacity, Jet-A: 84.00 gal (317.97 l)
basic empty weight, approximate: 1,345 lb (610.08 kg)
gross weight, normal category: 2,900 lb (1,315 kg)
gross weight, with external load: 3,200 lb (1,451.49 kg)
useful load, with external load: 1,855 lb (841.41 kg)
Rolls Royce 250-C20W, nominal power rating: 420 shp (313.19 kW)
maximum take-off power, S-434 application limited: 320 shp (238.62 kW)
maximum continuous power, S-434 application limited: 280 shp (208.80 kW)
4 blades, 471 rpm nominal
diameter: 27.51 ft (8.38 m)
effective disk area: 792 sq ft (73.58 sq m)
diameter: 4.25 ft (1.29 m)
- Related development
- Aircraft of comparable role, configuration and era
- Sikorsky S-434 page
- "Saudi Ministry of Interior takes delivery of Sikorsky's first pair of S434 helicopters". arabianaerospace.aero. Retrieved 7 March 2013.
- "Sikorsky® Schweizer™ S‑434™ Helicopter, 1483_SZR-008_S434_SS.indd 1". sikorsky.com. 15 February 2008. Retrieved 14 June 2013.
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