Robinson R44
Robinson R44 | |
---|---|
Type: | Light multipurpose helicopter |
Design country: | |
Manufacturer: | |
First flight: |
March 31, 1990 |
Commissioning: |
1993 |
Number of pieces: |
> 5000 |
The Robinson R44 is a four-seat, single-engine , piston -engine helicopter produced by the US company Robinson Helicopter Company.
General
It is the slightly larger version of the Robinson R22 and can carry four people. It is equipped with a six-cylinder boxer engine from Lycoming . Its TBO (= Time Between Overhaul ) for the engine, airframe and important mechanical components is given as 2200 hours. A more powerful variant with drive by a shaft turbine instead of the piston motor is called the Robinson R66 .
Versions
The following versions of the R44 are available:
- Astro , original version without hydraulic support
- Raven I (carburetor engine)
- Raven II (injection engine)
- of which one clipper variant with special equipment for sea operations (such as floats and improved corrosion protection)
- Cadet (from 2016), two-seater version with improved flight characteristics, based on the Raven I.
Incidents
In the mid-1990s, crashes with light helicopters of the technically related Robinson R22 and R44 types, in which the main rotor collided with the fuselage or the tail boom, increased. The Luftfahrt-Bundesamt (LBA) then recommended, among other measures, the cessation of flight operations with this type of helicopter. However, the recommendation was not implemented due to the LBA's own considerations, as changed technical instructions could reduce the risk of the rotor-hull contact causing the accident far enough.
There were repeated incidents with the model. One of the victims was the Ukrainian politician Taras Kutovyj on October 21, 2019 . When his Robinson R44 crashed near the village of Tarassenkowe (Tarasenkova, Orschytsja district), he was killed on the flight from Kiev to Poltava Oblast .
Technical specifications
Parameter | Data |
---|---|
crew | 1 |
Passengers | 3 |
Length (trunk) | 8.97 m |
Main rotor diameter | 396 in (10 m) |
Inside rotor blade depth | 10.6 in (269 mm) |
Outside rotor blade depth | 10 in (254 mm) |
Rotor blade twisting | −6 ° |
Height (torso) | 3.02 m |
Max. Blade tip speed (at 102% engine speed; corresponding to 2718 min −1 ) | 214.88 m / s (705 ft / s ) |
Empty mass | 1,506 lb (683 kg) |
Max. Takeoff mass | 2,400 lb (1,089 kg) |
Fuel tank capacity AvGas 100 LL main tank (without / with bladder tank) | 120 L (31.6 gallons ) / 115 L (30.5 gal) |
Additional tank capacity (without / with bladder tank) | 70 l (18.5 gal) / 65 l (17.2 gal) |
Top speed (up to 998 kg TOW without floats) | 240 km / h |
Cruising speed | 210 km / h |
Range | 644 km |
Max. permissible flight altitude | 4,270 m (14,000 ft ) |
Climb rate, ISA , at max. Takeoff mass | 5.1 m / s (1000 ft / min) |
Max. Hovering altitude IGE , ISA, at max. Takeoff weight | 2730 m (8950 ft) |
Max. Hovering altitude OGE , ISA, at max. Takeoff weight | 1370 m (4500 ft) |
Engine | 1 × Lycoming O-540 -F1B5 (1 × Lycoming IO-540-AE1E5 for Raven II) |
Base price 2007 (without transport, VAT, etc.) | € 310,000 |
It is driven by the motor via four double V-belts with a reduction of 0.778: 1 to the gearbox. This reduces the main rotor in a ratio of 11:57 by means of bevel gears and translates the compensating rotor in a ratio of 31:27.
Comparable helicopter types
gallery
literature
- Marcus Aulfinger: The great helicopter type book - helicopters of the world. Motorbuch Verlag, Stuttgart 2002, ISBN 3-613-01787-3 .
Web links
Individual evidence
- ↑ Investigation report by the Federal Bureau of Aircraft Accident Investigation on the increased number of R22 and R44 accidents in the 1990s ( memento of the original from March 4, 2016 in the Internet Archive ) Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice. (PDF, accessed on August 8, 2013)