950 Twin power multirole helicopter.

2011-12. PTD appointed by a start-up aviation company to study and design the elicopter overall interior ergonomics, its shell and supporting structure considering the entire location of all required technical equipments. The design is under developement towards prototyping and tests before its final implementation for serial production. The project take its inspiration from the Boeing CH 47 Chinook.

General dimensions:

Total Length: 9500 mm.
Max Height : 4000 mm.
Cabin Width : 1520 mm.
Cabin Internal Height: 1500 mm.
Rotor Diameter : 10 m.
Main Rotor Chord Length : 203 mm.
Blades: 3 + 3

Weights and Capacities:

Gross Weight: 2400 Kg.
Empty Weight: 1500 Kg.
Useful Load : 900 Kg.
Standard Fuel Capacity: 400 l - 88 U.S. Gallons ( n° 4 tanks ) Standard tanks.
Oil Capacity: 40 l - 10.4 US gallon.
Radiator Capacity: 2 x 25 lt.

Cargo Capacity and Configurations - Flexibility and multi-role capability:

Economy class configuration: Seats 7 + 1
Tender: Pilot + 5 business class seats.
VIP : Pilot + Body guard or mini bar + 4 First Class seats.
Patrol : 3 Seats + extra tank.
Ambulance: 4 seats +2 stretchers + medical equipments.
Cargo: 2 seats + 400 Kg up to 1000 Kg - with extra power engines - Volume: 4 cum.
Combo: 4 seats + 300 Kg - 500 Kg with extra power engines - Volume: 3 cum.

Performance:

Maximum speed: ( VNE ) 160 Km/h - 100 MPH - 87 kts.
Cruise Speed: 153 Km/h - 85 MPH - 74 kts.
Consumption: 68 x 2 lt/h = 136 lt/h ( 36 US Gall/h ) Total max. consumption.
Endurance with 400 l tank : 2 h 30' + reserve.
Range with 400 l tank: 380 Km approx.
Max rate of climb: 950 F.P.M ( 290 m/min ).
Service Ceiling: 3000 m - 10,000 ft.
Hover IGE : 2100 m - 7,000 ft.

Engines:

Power - Standard Configuration : 520 HP ( 2 x 260 HP ) @ 3400 rpm.
Special configuration: 600 HP ( 2 x 300 HP ).
Max. engine power output : 1010 HP ( 2 x 505 HP ) @ 6300 rpm.
Engine type LS 7 - GM -
Stroke : 4
Cylinders: V 8
Compression ratio: 11.0 : 1
Displacement : 427 cubic inches - 7.0 lt
Torque: 475 lb.-ft
Fuel Type : Automobile fuel - Unleaded Gasoline - 91 Octane
Cooling: water + oil

Long Range configuration:

Endurance with 800 l ( 176 US gallons ) : 5 h + reserve.
Range with 800 l ( 176 US gallons ): 760 Km approx.

Rotor System:

Three blades per hub ( Two hubs ).
Fiberglass construction.
Speed: 220 r/min.

Controls:

Dual full controls.
FADEC ( Fully Automated Digital Electronic Control ) Electronic Throttle Governor.

Overhaul:

All components were designed by Sikorsky for 1200 flight hours.
The LS7 engine has an overhaul period of 3000 hours.

Structure:

4130 Chromo alloy steel aircraft tubing airframe.
Aluminum sheet metal cabin for long life and durability.
Oil bath geared transmission housings.
Maintenance free auto-engagement clutch assembly.
Corrosion protection from salt air environments.
Titanium used in both rotor heads and transmission shafts.

Avionics:

Engine controls - Garmin updated avionics.
Transponder mode 3A/C - Etc.

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