Each main rotor is mounted on a vertical mast over the top of the helicopter, as opposed to a helicopter tail rotor, which. Robinson r44, main rotor blade failure, waikaia, southland, 23 january 2015. R22 pilots operating handbook and faa approved rotorcraft flight manual. Robinson produces three models the twoseat r22, the fourseat r44, both of which use lycoming piston engines, and the fiveseat r66, which uses a turbine engine. Data from robinson r44 raven ii pilots operating handbook and faa approved rotorcraft flight manual, dated june 2005. The engine on the robinson r44 is a sixcylinder piston engine driving the main and tail rotors.
When using the dynavibedynatrack system for track and balance procedures, the dynatrack optical blade tracker is mounted to the windscreen with a suction cup and a tach is mounted to the aircraft close to the main rotor. The transport accident investigation commission is an independent crown entity established to determine the circumstances and causes of accidents and incidents with a view to avoiding similar. The cadet features the same airframe, rotor system, and lycoming o540 engine as the proven r44 raven i. All semirigid rotor systems twobladed are susceptible to catastrophic inflight breakup if the helicopter experiences low g conditions and the pilot does not recover properly vertical magazine. The aircraft is a single engine helicopter with a semirigid, twobladed main rotor and a twobladed tail rotor. Lengthening both pitch links equally will increase autorotation rpm. Tail rotor direction of rotation on the r44 is reversed compared to the r22 for improved yaw control authority.
The robinson r44 is operated by many private individuals, companies, and flying clubs. On 23 january 2015 a robinson r44 helicopter was being used to spray. The versatile twoseat r44 cadet helicopter is ideally suited for flight training. Compliance deadline approaching for robinson r22 and r44. The helicopter has an enclosed cabin with two rows of side by side seating for a pilot and three passengers. The helicopter had been operated primarily for agricultural flying, usually at. It gets its name from the fact that it does not have a leadlag hinge, the way a fully articulated rotor system does. Scroll through the entire factory parts list below to find exactly the right part number, description or pricing information. The rotor system can be said to be rigid inplane, because the blades are not free to lead and lag, but they are not rigid in the flapping plane through the use of a. The primary fuselage structure is welded steel tubing and riveted aluminum sheet. Helicopter rotor system and design helicopter rotor.
R44 illustrated parts catalog robinson technical publications are the property of robinson. The national transportation safety boards special investigation of accidents involving loss of main rotor control by the robinson helicopter company rhc r22 was prompted, in part, by an accident that occurred during an instructional flight near richmond, california, on june 29, 1992. Introduction one aspect of the project urbanoise is a study of the noise impact of traffic on the urban environment. Ottobrunn helicopter special airfield edmr and flew west around munich to. This video covers the three types of main rotor system rigid, semirigid and fully articulated and how the rotor blades can move in each system. Veer basic introduction this is what helicopter is. R22 how engine powers main rotor and tail rotor drive. The tail rotor s position and distance from the center of gravity allow it to develop thrust in the same direction as the main rotor s rotation, to counter the torque effect created by the main rotor. The atsb found that one of the main rotor blades struck and separated a. Rhc technical publications, in whole or in part, are not otherwise permitted to be reproduced, transmitted. The r44 ii is a fourplace, single main rotor, single engine helicopter constructed primarily of metal and equipped with skidtype landing gear. The purpose of this civil aviation safety alert casa is to alert owners and operators of robinson helicopter r44, r44 ii and r66 helicopters of possible fatigue cracks on part numbers pns c0167 and f0162 main rotor blades and. Part number description price 000300434 crystal 58.
The safari main rotor system has four basic adjustments. Main rotor disc vortex interference 285 315 degrees winds within this region can cause the main rotor vortex to be directed onto the tail rotor. R44 maintenance manual robinson technical publications are the property of robinson. Tail rotor direction of rotation on the r44 is reversed compared to the r22 for improved yaw control. The robinson helicopter company, based at zamperini field in torrance, california, is a manufacturer of civil helicopters. As a result of this incident, the manufacturer developed a modification for main rotor blades in service, and made design changes to new main rotor blades for r44 and r66 helicopters. If you are currently operating a robinson r22 helicopter with main rotor blades with part numbers a0164 or an robinson r44 with part number. Robinson r44 main rotor blade fatigue cracks civil. Part 2 normal procedures of the flight manual contained the caution. R44 raven or r44 raven i is used as a marketing designation for the r44 with hydraulic controls. Descriptive data 1 robinson r44 raven ii poh descriptive data. R44 pilots operating handbook robinson helicopter company. Faa announces 5 year retirement on r22 and r44 main rotor. The tail rotor is a smaller rotor mounted so that it rotates vertically or nearvertically at the end of the tail of a traditional single rotor helicopter.
The illustrated parts catalog and maintenance manual, used in conjunction, compliment each other. Consult the robinson r44 illustrated parts catalog 2015 robinson r44 parts price list. The new ad 20142316 which is to become effective january 9th, 2015 stipulates continued prescribed inspection procedures, but includes a terminating action requiring replacement of effected r22 and r44 main rotor blades within a 5 year period from the effective date of the airworthiness directive no later than january 9th, 2020. R22 how engine powers main rotor and tail rotor drive train. The regs do mention that you have to replace life limited parts to maintain airworthiness though, and for the r44 thats a long list at 2,200hrs. The hydraulic system consists of a pump, three servos, a reservoir, and interconnecting lines. R44 astro is used as a marketing designation for the r44 with electric trim system without hydraulic controls. The tailcone is a monocoque structure in which aluminum skins carry most primary loads. Inflight breakup involving robinson r44, vhznz, 41 km.
Painting r22 and r44 main rotor blades civil aviation. Robinson r44, zkipy, lochy river, near queenstown, 19 february 2015. A helicopter main rotor or rotor system is the combination of several rotary wings rotor blades and a control system that generates the aerodynamic lift force that supports the weight of the helicopter, and the thrust that counteracts aerodynamic drag in forward flight. The robinson r22 is a twobladed, single engine light utility helicopter manufactured by. Warning refer to safety data sheets sds and observe precautions when working in proximity to hazardous materials. It has an enclosed cabin with two rows of sidebyside seating for a pilot and three passengers. Downloads robinson r22 and r44 main rotor blade disbonds pdf 174. Actual helicopter forces on helicopter when the blades are spinning then the natural reaction to that is for the fuselage of the helicopter to start spinning in the opposite direction to the rotors. The r44 is a singleengined helicopter with a semirigid twobladed main rotor, a twobladed tail rotor and a skid landing gear. Inspect the main rotor blade skin around both inboard trim tab alignment rivets as.
Panels to the side of the engine were removed, the main rotor head, blades, teeter and coning bearings, swashplate and the control systems were thoroughly. Interim report bundesstelle fur flugunfalluntersuchung. The vibration was thought to have originated from the main rotor system and this was given the most attention. The robinson r22 is a twobladed, singleengine light utility helicopter manufactured by. Robinson r22 and r44 main rotor blade disbonds civil. There are three main models of robinson helicopters in new zealand. Robinson r44 12 r44 panel please note that not all warning lights may be operational.
Two people are dead after a robinson helicopter crashed. This topic takes on an almost mystical tone with some nonaviation writers, but it is mostly a matter of physics and it is not unique to the r44. Due to the issues relating to a low inertia rotor system and a teetering main rotor, operation by any pilot in the united. R44 raven i single main rotor blade including spindle and spare blade root with spindle with 1012 hours. Designed like a jacket with sleeves and no collar, the rotor hub cover fastens together below each blade with delrin buckles. One or two accelerometers are mounted on the airframe depending on the specific procedure being followed. Engine r44 raven i o540 225 bhp 5 minutes 205 bhp max continuous engine r44 raven ii io540 245. Schedule of airworthiness directives robinson r44 series helicopters ad r44 10 amdt 1 main rotor blade 1498 dm applicability. Cooling fans in piston engine helicopters cancelled pdf 29. The robinson r44 is a fourseat light helicopter produced by robinson helicopter company.
Robinson r44 helicopter main rotor gearbox corrosion pdf 259. Select tech support from the automated phone system. R22 inputs from swashplates to rotor blades youtube. Issues related to the robinson helicopter corporation rhc r22 main rotor drive system pdf 49. Main items other than the blades are the complete main and tail rotor gearboxes as well as the upper frame, which means a complete strip. The left quartering headwind forces the downwash from the main rotor system into the tail rotor, interfering with the normal efficiency of the tail rotor. Systems description general the r44 ii is a fourplace, single main rotor, single engine helicopter constructed primarily of metal and equipped with skidtype landing gear.
Manual, rtr 461, dated 10 december 1992, with revisions through 20 april 2007, or later. Airworthiness directive adr4410 amdt 1 main rotor blade. If you wish to receive future changes to r44 pilots operating. R44 illustrated parts catalog robinson technical publications are the property of robinson helicopter company, inc. Model r44 helicopters, serial numbers 0002 through 0486, with main rotor blades part number pn c0161 installed. If this torque isnt controlled, the helicopter would just. Rotor hub covers overlaps with the blade covers to ensure complete protection for the entire main rotor system. Note verify aircraft is on level ground when evaluating gearbox oil level. Adjusting blade track will move lateral vibrations along the. Helicopter rotor system and designsumeet guide mrs. This helicopter is approved as a normal category rotorcraft. Lengthening a pitch link by one turn will lower the blade tip 2 inches. The information below is for informational purposes only.
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