Sikorsky S-434

S-434

Role	Light utility and trainer helicopter
Manufacturer	Sikorsky Aircraft
First flight	18 December 2008
Status	Active In production
Primary user	Ministry of the Interior
Produced	2008–present
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.

On June 15, 2009, Sikorsky announced the delivery of the first two S-434s to Saudi Arabia's Ministry of the Interior, the first of a total of nine.^[1]

Variants

S-434: based on improvements developed for the MQ-8B; powered by one Rolls-Royce 250-C20W turboshaft engine of 320 shp.^[2]

Operators

Saudi Arabia

Ministry of the Interior^[3]

Specifications (S-434)

Sikorsky Schweizer S‑434 Helicopter^[4]

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)

Turboshaft Engine:

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)

Main Rotor:

4 blades, 471 rpm nominal

diameter: 27.51 ft (8.38 m)

effective disk area: 792 sq ft (73.58 sq m)

Tail Rotor:

diameter: 4.25 ft (1.29 m)

References

↑ Sikorsky Global Helicopters to Deliver First Two S-434 Military Helicopters
↑ 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" (PDF). sikorsky.com. 15 February 2008. Retrieved 14 June 2013.

External links

Wikimedia Commons has media related to Sikorsky helicopters.

S-434 page on Sikorsky.com

Sikorsky aircraft
Fixed-wing aircraft (company designations)	S-1 S-2 S-3 S-4 S-5 S-6 S-7 S-8 S-9 S-10 S-11 S-12 S-13 S-14 S-15 S-16 S-17 S-18 S-19 S-20 S-21 S-22 S-23 S-24 S-25 S-26 S-27 S-28 S-29-A S-30 S-31 S-32 S-33 S-34 S-35 S-36 S-37 S-38 S-39 S-40 S-41 S-42 S-43 VS-44 S-45
Fixed-wing aircraft (military designations)	C-6 C-28 JRS JR2S PS RS XBLR-3 XPBS XSS XV-2
Helicopters (company designations)	VS-300 (S-46) S-47 S-48 S-49 S-50 S-51 S-52 S-53 S-54 S-55 S-56 S-57 S-58 S-59 S-60 S-61 S-61L/N S-61R S-62 S-63 S-64 S-65 S-66 S-67 S-68 S-69 S-70 S-71 S-72 S-74 S-75 S-76 S-80 S-92 S-97 S-300 S-333 S-434
Helicopters (military designations)	SH-3 HH-3E/F R-4 H-5 H-6 H-18 H-19 H-34 CH-37 XH-39 HH-52A CH-53 CH-53E CH-53K CH-54 HLH HH-60G HH-60J MH-60R/S SH-60B/F SH-60J/K UH-60 VH-60 RAH-66 H-92 CH-124 CH-148
Experimental aircraft	Cypher Cypher II Firefly X2 XBLR-3 XV-2

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