R66 Limitations for A/s + physical aircraft components

Stage 1

Color Code for Instrument Markings

• red: operating limit

  • edge of red line indicates limit

  • pointer should not enter red during normal operation

• red cross-hatch: Power-off VNE

• Yellow: Precautionary or special operating procedure range

• Green: normal operating range

VNE for 2200 lb TOGW or above

130 KIAS

VNE for below 2200 lb TOGW

140 KIAS

Power Off / Autorotation VNE

100 KIAS

VNE for above 83% torque

65 KIAS

VNE for any cabin doors removed

100 KIAS

Rotor rpm Speed Limits - Power ON

limited by N2 limits

min continuous: 99%

max continuous: 101%

Rotor rpm Speed Limits - Power OFF

min: 88%

max: 106%

N2 (output shaft speed) RPM limits

• continuous: 99-101%

  • note: intentional operation outside Continuous RPMl imits is prohibited

• maximum transient overspeed: 106%

  • note: avoid large, rpaid power changes. governor reacts slowly and RPM excursions may occur

• yellow arc: transient operation only (if there for longer than a minute, EMU logged)

N1 (gas generator speed) RPM lim

max: 105%

Measured Gas Temp (MGT)

Normal ops (after engine starts):

• continuous: 0 to 706 ^oC (unlimited time)

• 5 min limit (yellow): 706 to 782 ^oC (5 min)

• Transient limit: 782 to 843 ^oC (6 seconds)

Limit during start:

• via POH: above 782 (10 sec)

  • via EMU logging: above 810 ^oC for 10 sec

• immediately above 927 ^oC

Torque limits

• continuous: up to 83%

• 5 min limit: from 83 to 100%

Oil temperature, max

107 ^oC

Oil pressure

• Yellow arc:

  • min below 78% N1: 50 psi

  • min from 78% to 94% N1: 90 psi

• min above 94% N1: 115 psi (not indicated)

• Green arc:

  • continuous operating max: 130 psi

• max during start and warm up: 150 psi (indicated by red line)

Oil quantity min for T/O

4 qts

Max gross weight

2700 lbs

min gross weight

1400 lbs

max per seat (including under-seat compartment)

300 lbs

max in any under-seat compartment

50 lbs

Baggage compartment - max distributed load

50 lbs/ft²

Baggage compartment - max total load

300 lbs

CG limits

refer to W and Balance plot charts

our reference datum is 100 in in front of the main rotor shaft centerline (POH 1-8)

• note:

  • a solo pilot of 160 lbs or greater can fly with all doors installed and no load in baggage compartment

  • if nighter than 160 lbs, compute W&B; removable ballast may be required to obtain CG @ or fwd of aft limit

Fuel Capacity

total: 74.6 gal

usable: 73.6 gal

• remaining is at the bottom that cannot be reached

fuel we use

Jet A

• anti-icing additive required when ambient temperature is below 4 ^oC (40 ^oF)

• not approved for ambient te,ps below -32 ^oC (-25 ^oF)