Rahul Sharma (Editor)

Sikorsky S 434

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Top speed
222 km/h

9.4 m

610.1 kg

First flight
December 18, 2008

724 km

Cruise speed
194 km/h

Engine type
Allison Model 250

Sikorsky S-434 wwwhelistartcompicturess434jpg

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.


based on improvements developed for the MQ-8B; powered by one Rolls-Royce 250-C20W turboshaft engine of 320 shp.


 Saudi Arabia
  • Ministry of the Interior
  • Specifications (S-434)

    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)

    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)


    Sikorsky S-434 Wikipedia

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