Robinson R66 Flashcards
R66 length and height
Length - 38.25’
Height - 11.42’
R66 main and tail rotor diameter
Main - 33’
Tail - 5’
R66 engine model and HP
Engine - RR 250c-300/A1
Horse Power - 300 SHP
- MCP 224 SHP
- 5 min 270 SHP
R66 VNE power on and off
VNE power on (sea level)
- above 2200lbs - 130kts
- bellow 2200lbs - 140kts
VNE power off - 100kts
Additional
- 65kts max above 83% torque
- 100kts max doors off
R66 Rotor limits power on/off
Power on - 99%-101%
Power off - 88%-106%
R66 gas generator max (N1)
105%
R66 output shaft speed (N2)
Max continuous - 101%
Min continuous - 99%
Max transient - 106%
R66 MGT limits (°C)
5 min limit - 782°
Max continuous - 706°
Max transient - 843° 6 sec
Max start - 927° 10 sec
R66 torque limits
5 min Take off - 100%
MCP - 83%
Note* MAX torque above 65kts indicated - 83% due to vertical stab efficiency.
R66 max oil temp
107°c
R66 oil pressure limits
Max during start and warm up - 150psi
Max operating - 130psi
Min above 94% N1 - 115psi
Min bellow 78% N1 - 50psi
Min from 78% - 94% - 90psi
R66 min and max weight
Max gross - 2700
Min gross - 1400
R66 max seat and baggage weight
Max seat - 300lbs (50 under)
Max baggage - 300lbs (50lbs per sqft)
R66 max and min operating temp
Max - isa plus 35°c. Not to exceed 50°c
Min - (-40°c)
R66 fuel capacity and burn rate
Capacity - 73.6 gal usable
Burn rate - 23 gph
R66 enhanced auto configurations
Max glide - 90 kts and 90% rotor rpm 1nm per 1,100’
Minimum descent - 60kts and 90% rotor rpm 1300fpm
R66 air restart
-If N1 is above 20%, press start button for restart.
- if N1 bellow 20%
- fuel cutoff – off
- throttle – closed
- start button – press and release
- N1 15% or above – fuel cutoff on
- after peak MGT – throttle full open
R66 engine fire during start or shutdown
- Fuel cutoff – pull off
- Starter button – press on and release
- Fuel valve knob – pull off
- Battery switch – off when MGT decreases to 150°c or fire worsens
- If time permits, apply rotor break
- Exit aircraft
R66 engine fire in flight
- immediately enter autorotation
- cabin heat – off (if time permits)
- if engine is running, land immediately, pull fuel cutoff and fuel valve off
- if engine stops running, pull fuel cutoff, fuel valve off, complete auto
- if time permits, apply rotor break
- exit aircraft
R66 electrical fire
- Battery and generator – off
- open cabin vents
- land immediately
- pull fuel cutoff, fuel valve off
- apply rotor break if time permits
- exit aircraft
R66 HYD failure
- verify HYD switch – ON
- if hydraulics not restored – HYD switch off
- adjust airspeed and flight conditions for comfort
- land as soon as practical, run on landing recommended.
R66 governor failure
- if N2 overspeeds, attempt to control rpm with throttle
- if N2 underspeeds, verify throttle full open, reduce collective to control rpm
- land as soon as practical
Note* if rpm cannot be controlled, close throttle and perform auto
R66 MR TEMP/PRESS warning light
Land immediately
R66 engine oil warning light
- check pressure gauge
- pressure low – land immediately
- pressure normal – land as soon as practical
- n1 bellow 50% – possible flame out, attempt air restart
