R66

What’s the difference between R44 and R66 in width, length and height?. 8 inches wider, 8 inches taller, 1 inch longer. 5 inches wider, 5 inches taller, 2 inches longer. Same dimensions.

Where is the datum located?. 100 inches forward of main rotor centerline. At main rotor centerline. 50 inches aft of main rotor.

What is the HP of RR 250-C300/A1?. 270 HP at 6016 RPM. 300 HP at 6016 RPM. 224 HP at 6016 RPM.

What is the 5-minute takeoff limitation on R66?. 224 HP at 6016 RPM. 300 HP at 6016 RPM. 270 HP at 6016 RPM.

What is the maximum continuous power on R66. 224 HP at 6016 RPM. 270 HP at 6016 RPM. 300 HP at 6016 RPM.

What is the purpose of coning hinges on R66. Remove bending loads from rotor blades. Increase rotor RPM. Reduce drag.

If I have an exceedance, what exceedance am I having for. R66 transmission. Rolls Royce engine. Main rotor blades.

What is the purpose of the 2 coning hinges and 1 teeter. Remove dissymmetry of lift. Increase blade rigidity. Improve fuel efficiency.

Are the 3rd and 4th turbine disks connected to?. Yes, mechanically connected. Not connected, free turbine gas coupled. Connected by gearbox.

What accessories are driven by N1?. Fuel pump, Starter Generator, Oil pump, FCU, N1 speed sensor. PTG and N2 sensor. Hydraulic pump only.

What accessories are driven by N2. Fuel control unit. PTG and N2 speed sensor. Oil pump.

How many bearings are in the engine. 7. 8. 9.

At what percentage does the starter disengage. 40%. 58% commanded by GCU. 65%.

What type is the landing gear?. Hydraulic type. Spring and yield type. Rigid steel type.

Can we repair the seats. Yes, field repair. Yes, with approval. No, must be sent to factory.

What percentage of N1 is used for cooling. 60%. 75%. 90%.

N1 speed sensor is looking at. Main rotor shaft. Spur adapter gear shaft. Transmission output shaft.

What transducers are installed on the engine?. Oil pressure and torque. Fuel pressure only. Hydraulic pressure only.

Where are the MGT thermocouples installed?. Before compressor. Between 2nd and 3rd turbine disks. After exhaust.

What triggers the red cabin oil pressure annunciation?. Oil transducer. Pressure switch independent in engine. Low fuel pressure.

Lower oil chip detector collects oil from?. Engine. Gearbox. Hydraulic system.

Upper chip detector sees all the oil?. True. False.

How many scavenge elements are in the engine?. 3. 4. 5.

Why do we have shims on flexplate driveshaft?. Reduce vibration. Remove axial preload. Increase torque.

Is the TRDS supported?. Yes, at front. No. Yes, at rear.

Which side collects fuel tank info?. Right. Center. Left.

Correct position of blue/gold and red balls in ventilation?. Red up, blue down. Blue/Gold up, red bottom. Both center.

Reference date for inspections?. Manufacturing date. Initial CofA date / 8130-3 for components. First flight.

Hourmeter feed from to be activated?. Avionics bus. Transmission oil & electrical. Battery only.

Can some components be replaced by R44 parts?. Yes, but lower service life penalty. No. Yes, no limitation.

How many degrees is the engine installed?. 25. 37. 45.

Engine-to-transmission driveshaft is preloaded?. False. True (gearbox moves up in flight). Only on ground.

Purpose of hanger bearing?. Increase torque. Anti-vibration unit. Oil lubrication.

Why full collective down switch turns AC off?. Save battery. Preserve MR kinetic energy. Reduce noise.

Gearbox pumps are for?. Bottom transmission oil & upper hydraulics. Bottom hydraulics upper transmission.

Is Telatemp primary source?. Yes. No, secondary. only for Hydraulics.

Hydraulic Telatemp should exceed gearbox Telatemp?. True. false.

What gives precone in tail rotor blades?. Blade twist. Spacers. Pitch links.

If TR can’t be balanced, check?. Tail rotor gearbox. Pitch link material (aluminum vs steel). Bearings.