VSKYLABS Guimbal Cabri G2 Pilot’s Operating Handbook
WARNING: DO NOT USE FOR REAL FLIGHT OPERATIONS
VSKYLABS Guimbal Cabri G2
VSKYLABS CABRI G-2 Specs & Checklists
The following information and checklists are NOT to be used in real-life training and flying. For real world flying use ONLY official, updated real-world manuals, checklists and supplements.
Performance and Specifications
General Performance and Specifications:
Equipped empty weight: 420 kg (925 lb)
Maximum Gross Weight: 700 kg (1542 lb)
Maximum level speed @ 100% (s.l. ISA): 100 kt (185 km/h)
Cruise speed @ 85%: 90 kt (166 km/h)
Vne (s.l.): 130 kt (240 km/h)
IGE hovering ceiling (@ 700 kg): 5000 ft
Hovering ceiling (2x77 kg + fuel 2 hrs): 7500 ft
Range @ 85 % (15 min reserve): 380 NM (700 km)
Maximum endurance @ 50 kt (no reserve): 5 hr 40
Main Rotor:
Type: Articulated, soft-in-plane
Number of blades: 3
Diameter: 7.2 m (23.6 ft)
Chord: 180 mm (7.1 in)
Speed: 530 RPM
Tail Rotor:
Type: Fenestron®
Number or blades: 7
Diameter: 0.6 m (23.6 in)
Chord: 42 mm (1.6 in)
Speed: 5148 RPM
Transmission:
Primary transmission: Belt with a reduction ratio of 0.855/1
Main gearbox: Bevel spiral gear with a reduction ratio of 11/47
Tail Gearbox: Bevel spiral gear wit a multiplication ratio of 25/11
Powerplant:
Engine model: Textron Lycoming O360-J2A
Type: Horizontally-opposed, four-cylinder, air-cooled, carburetted, Double-ignition with one magneto and one electronic ignition.
Displacement: 361 cu.in (5.9 litres)
Max continuous power: 145 shp @ 2585 - 2700 tr/min (108 kW)
Nominal speed: 2650 RPM
Fuel:
Max capacity: 170 litres (45 US Gal)
Unusable quantity: 1.5 litre (0.4 US Gal)
Approved fuel type: Avgas 100 LL
General Limitations
Only day VFR is approved.
Aerobatic flight is prohibited.
Voluntary in-flight engine shut down is prohibited.
Flight in known icing conditions is prohibited.
Flight under snow is prohibited.
Operation is approved with either or both doors removed. In these cases, no loose object is allowed in the cabin. Speed limitations are the same as ones with doors installed and closed.
Flight Envelope Limitations
Altitude Limitation:
Maximum operating altitude (Zp) .................................. 13 000 ft
OAT Limitations:
Maximum temperature ..................................................................ISA + 30°C
limited to + 45°C
Minimum operating temperature ....................................... - 20°C
Minimum storage temperature ......................................... - 30°C
Airspeed limits (-2 kt IAS per 1000 feet):
Vne power-on .....................................................130 kt IAS
Vne power-off ....................................................110 kt IAS
Caution range .................................................0 – 45 kt IAS
Rotor Speed Limits:
Power-on:
Maximum............................................................. 540 RPM
Green arc ................................................... 515 to 540 RPM
Minimum............................................................. 515 RPM
Power-off:
Maximum............................................................. 610 RPM
Caution range................................................... 540-610 RPM
Normal range.................................................... 515-540 RPM
Caution range................................................... 450-515 RPM
Minimum............................................................. 450 RPM
Rotor brake operation:
Maximum............................................................. 150 RPM
High NR horn ...................................................... >594 RPM
Low NR horn ....................................................... <466 RPM
Rotor brake operation:
Take-off and climbs................................................50 kt IAS
Best range.........................................................80 kt IAS
Autorotation...................................................... 50 kt IAS
Never-exceed speed (Vne ), power on ............................. 130 kt IAS
Never-exceed speed (Vne ), power off..............................110 kt IAS
(-2kt IAS per 1000 feet)
Doors:
Operation with one or two door(s) removed is allowed with no additional limitation in the whole flight envelope.
NORMAL OPERATIONS
Before Engine Start:
Harnesses..................................................... Both fastened
Cockpit ...............................................All objects correctly secured
Pedals .....................................................Full travel free
Collective ............................. Friction released, full travel free
Cyclic .....................................................Full travel free
Breakers................................................................. In
Hour Meter ......................................................... Checked
Fuel shut-off valve ..............................................Checked ON
Collective ................................................Down, friction on
Altimeter............................................................... Set
All switches............................................................ OFF
Carburetor heating switch ............................................. Auto
MASTER switch............................................................ ON
NR switch............................................................ Backup
NR green light ...................................................Checked ON
Lights and NR horn automatic check .................. Monitored, all working
NR/EPM operation is the VSKYLABS Guimbal Cabri G2 is being
simulated in a simplified way. Some operational differences
may be encountered.
Governor ........................................OFF, check GOV OFF light ON
Mixture ..................................................Forward, full rich
Note: Before starting, NR green light, GOV OFF, OIL P, ALT.
lights are on. CLUTCH light may also be ON.
Engine Start:
Headset.................................................................. ON
Radio.......................................................... ON if needed
Altimeter setting .......................... Correlated with ATC information
Compass heading indication ........................................ Verified
Strobe................................................................... ON
Fuel pump ................................. ON, check Fuel pressure increase
Manual fuel injections............................................ As needed
Throttle...Monitor on MLI :
START as required between 0% and 15%
Rotor brake ......................... Apply - check the light - lock forward
Mixture ...................................................Full rich forward
Ignitions, Magneto and Plasma.............................. ON, check beeper
Area...................................................................Clear
Radio clearance if needed
Starter.............................................................Activate
STARTER light................checked ON and back OFF when switch is released
After engine starts, Throttle..........................Idle, 0% START on MLI
Alternator .......................................... ON, check ALT goes off
Check oil pressure light.................. OFF within 30 seconds of starting
If not, shutdown the engine by mixture off
Set engine speed to:
Warm engine.............................................................idle
Cold engine.........................................................1000 RPM
CLUTCH .......................... Engage and lock switch – check light is ON
Rotor and Engine indicators......................................................Synchronized
CLUTCH light....................................................Wait for OFF
Ignition Test:
Set engine speed to......................2000 RPM (upper purple radial mark)
Plasma OFF 5 sec. – maximum drop ............... 300 RPM (lower radial mark)
Magneto OFF 5 sec. – maximum drop .................................. 100 RPM
Set rotor speed ................................................NR < 450 RPM
Wait for Oil temperature to increase as needed.
Set rotor speed to ................................................. 530 RPM
Check BARC backup green light lights ON
CARB. HEAT.............................................................. HOT
Wait for an additional Carb brick to pop
Check that NR drops
CARB. HEAT..............................................................COLD
Wait for the additional Carb brick to disappear
Check that NR increases
CARB. HEAT ............................................................ AUTO
Roll-off throttle to idle................... Check needles desynchronization
Check lower BARC light blinks when NR in yellow arc
Check warning horn when NR approaches lower red limit
Switch BARC to mute warning horn. This will also switch to normal mode
Check idle stabilization
Governor ON, Roll-in throttle:
Check governor engages from NR = 400 RPM
Check rotor speed in green arc
Note-1: The VSKYLABS Guimbal Cabri G2 engine and rotor RPM values might differ from the real aircraft due to simulation limitations. These will gradually tune up as the project development plan is also including this aspect.
Note-2: Current configuration of the throttle and governor in the VSKYLABS Guimbal Cabri G2 is not allowing manual throttle management when the governor is ON. This issue will be addressed in future versions of the project.
Before Takeoff:
Oil temperature................................................. 30°C (86°F)
minimum recommended 60°C (140°F) minimum for max power
Doors.......................................... Closed or secured with strap
Harnesses .....................................................Both fastened
Pressures and temperatures ...................................... Green arcs
Warning and caution lights...............................................OFF
Performance calculation ......................... first limit checked on MLI
Landing light and NAV. light ......................................As needed
Radio .............................................................As needed
Collective friction.................................................Released
Takeoff Procedure
Apply collective pitch progressively to stabilize hover at 2 feet skid height.
Adjust cyclic trim.
Check engine parameters in green arcs and warning / caution lights OFF.
Apply a slight forward cyclic to accelerate at a constant height.
At 45 kt IAS, rotate to reach and maintain 50 kt IAS.
Once climb is stabilized, adjust power as needed. Rate of climb should not exceed 500 ft/min below 100 feet in order to ease piloting in case of an engine failure.
Follow take-off profile shown on Height-Velocity diagram in the manual page 5-3
Climb
Prescribed climb speed is 50 kt IAS.
Adjust power to obtain desired rate-of-climb. Maximum allowed power is indicated by 100% on MLI.
If full throttle is reached (100 % FLOW on the MLI), the rotor speed may decrease. In this case, slightly lower the collective to recover rotor speed.
Cruise
All parameters .................................................. Green arcs
Warning and caution lights...............................................OFF
Fuel remaining.........................................................Check
Economy cruise is obtained with ..................................90% on MLI
Fast cruise is obtained with ....................................100% on MLI
Maximum endurance speed is........................................ 50 kt IAS
Best range speed is .............................................. 80 kt IAS
