LIMITS

Here's a pretty comprehensive list of all the limits you'll need to know for the phrog.

Click | here for printable format.

'''Engines: T58-GE-16'''

1870 shp (mil)

1770 shp (norm)

10-stage axial comp

annular combustion

2-stage axial gas turbine

2-stage power turbine

Ng:
100% Ng = 25,200 RPM

Min Idle: 48% (based on T2)

Normal Idle: 53-59% Normal: 101.9-103.4% Max Cont: 103.4% Transient: 103.5-106.4%, Avoid sustained ops Transient: 106.5-108.4%, 15 sec Never exceed: 108.4%

Variable Stator Vanes: 65-95% Starter/Ign Drop-off: 46% (Start bleed closes 5 sec later)

Nf:
100% Nf = 19,500 RPM

Min: 88% Normal: 88-109.1% Max Cont: 109.1% Transient: 109.2-123.1%, Avoid sustained ops Never exceed: 123.1% Beep Trim: 94 – 113% Mech Overspeed: 124%

Torque:
Dual Normal: 0-100% Dual Transient: 101-106%, 10 sec Dual Transient: 107-114%, 5 sec Single Normal: 0-134% Single Transient: 135-142%, 60 sec Single Max: 143% Balls: 107, 134, 143%

T5:
Norm: 300-785 C

Max Cont: 785 C Military Power: 786-805 C, 30 min Topping: 806-835 C, 5 min Transient: 836-870 C, 10 sec Transient: 871-950 C, 2 sec

Oil:
Tank Capacity: 3.5 gal (2.1 gal oil) Primary Oil: O-156

Oil Press: Crank: > 0 psi ECL Start: 12 psi min ECL Fly: 20 psi min Normal: 20-62 psi Max: 62 psi Caution Light: 12 psi Check valve open: 6 psi Relief valve: 100 +- 5 psi

Oil Temp: Oil cooler max temp: 250 F Oil cooler min temp: 160 F

Transmissions:
Mix Box Reduction: 7.6:1

Overall Reduction: 73.6:1

Oil Temp: Min: -12 C Norm: -12-100 C Max: 110 C Caution Light: 110 C

Oil Press: Min: 20 psi Norm: 20-85 psi Max: 85 psi Caution Light: 20 psi

Primary Oil: O-156

Fwd Quantity: 3.5 gal sump

Aft Quantity: 5.8 gal sump

Filter Bypass: 25-30 psi (Indicates at 15-18 psi) (Thermal bypass 105-125F) Cooler Bypass: 106F

Hydraulics:
Utility: APU Min: 3000 psi APU Norm: 3300-3450 psi, 14 gpm APU Nominal: 3400 psi APU Max: 3800 psi

Aft Xmsn Min: 3000 psi Aft Xmsn Norm: 3350-3550 psi, 56 gpm Aft Xmsn Nominal: 3500 psi Aft Xmsn Max: 3800 psi

PTU Operation: 3350 psi in, 1500 psi out PTU solenoid ctl valve flow limiter: 0.45 – 2.70 gpm

APU & Xmsn pump replacement indicators: 2 gpm drain fluid

200” Accum: 700 psi N2, 1400-1630 psi @ 70F 5” Accum: 1400-1600 psi Air collection tank: 1 qt liquid capacity Fluid reservoir relief valve: 3700 psi Hydraulic filler: 1 qt

Press/Return Filter Ind: 75 +- 10 psi (Incorporates temp compensating device) (Press filter does NOT bypass;

Ret filter bypass @ 100 +- 10 psi)

Pressure reducer sends 3000 psi to: Reservoir Cooler 5 & 200” acc RoPoMo Ramp/Hatch

Cooler: cools drain fluid from all pumps and motors 85-91°C - Fan comes on

63-68°C - Fan turns off

149°C+/-3 - Light on

133-142°C - Light off  Subsystems: Rotor Brake Cargo Winch Rescue Hoist EAPS APU/Engine start Ramp/Hatch Rotor Pos Motor
 * 1) 2 Flight Boost PTU

Fwd Isol: Hoist, Winch, Rotor Brake

Ramp/Hatch: Cockpit: 10 sec open/close Manual: 10 sec norm (500 psi), 3-4 sec high (3000 psi) EAPS: Auto off @ 75-85 Kts; Auto on @ 55-65 Kts Hoist: 3500 psi Rotor Brake: 25” acc, 700 psi N2; 1215 psi charged (through press. reducer)

Boost:
Min: 1050 psi Norm: 1300-1750 psi Pumps: 1500 psi Max: 1750 psi Caution light: 1000 psi Ctl Boost Interlock: 1000 psi

Quantity: 5 pints each 12-in accum press: 700 psi precharge

Primary Fluid: H-537 mil-prf-83282

Rotors:

25.5 ft x 18.75 in

Pitch: 1 – 17 deg

Nr:
100% Nr = 264 RPM

Min: 88% Transient: 88-93% below 6000 DA Transient: 88-99% at or above 6000 DA Normal: 94-104% below 6000 DA Normal: 100-104% at or above 6000 DA Transient: 105-113% (No maint action) Transient Overspeed: 114-125% (Maint action) Never exceed: 125%

Folding/Unfolding: 45 kt, any quadrant

Engage/Disengage: 000-030: 20 kt 031-040: 30 kt 041-340: 45 kt 341-359: 30kt

Primary Oil: C-642

Fuel
Primary: JP-5, JP-4, JP-8

Volume: 330 gal/side

Boost Pressure: 20 psi

Boost Caution Light: 3 psi

Boost Required above 8000 PA

Fuel Jettison: 1550 lbs, 330 ppm (692 lbs, or 65 mins normal cruise, post-jettison)

Fuel Low Caution Light: 325 lbs (14%, 20 mins flight)

AF Filter Bypass: 1.56-1.91 psi (Button @ 0.93-1.15 psi)

Hi-Press Gear Pump: 1000+ psi

Computing Section of FCU: Fuel Press, Ng, Fuel Dens, T2, P3

Single-Point Refuel: 4 minutes, max 55 psi

Gear Pump: 	Idle – 4.6 gpm @ 240 psi

Normal – 7.75 gpm @ 950 psi

Military – 9.7 gpm @ 1050 psi

APU:
Weight: 69.5 lbs

Power: 65 shp

Oil: 3 qt

Fuel Consumption: 92 pph

Start Fuel Pressure: 100-120 psi

Motor/Pump switch: 90% speed

Pump Pressure: 3350 psi

Generator Ouptut: 10 kVA

Oil Pressure Shutoff: 5 psi

Thermal Shutoff: 560 C

Overspeed Shutoff: 110% (Not overridden during main start)

Electrical:
115/200V, 3-phase, 400-Hz AC and 28V DC

Max Ouptut: 40 kVA @ 92% Nr

Battery: 24V, 7.5 amp-hr, lead-acid

Gen Dropout: 88% Nr

AFCS:
Min AS for Pitch/AS retention: 40KIAS

Single AFCS Max AS: 110KIAS

DASH to neutral: 1” or 1.4”/sec cyclic movement or 18 deg nose up

LCTA: TAXI < 90KIAS, < 6000 ft DA	 FWD > 90KIAS, > 6000 ft DA

Altitudes:

Airspeeds (KIAS):
Vne: 145 kt/ CGI Lim

Failed Cyclic Trim Actuator: 0-65 kt, or 0-90 kt in TAXI

Sideward: 35 kt

Rearward: 30 kt

Single AFCS: 110 kt

Ext Hoist: 100 kt max

Cabin door opening/closing: 30 kt max

Cabin door rescue pos: 50 kt max

HEFS deployed: 90 kt

Auto w/HEFS installed: 100 kt

Maneuvering:
No aerobatics

Coord turns: 45 deg or CGI lim Inop CGI: <6000 DA: 45 deg when AS <= 80% Vne

<6000 DA: 30 deg when AS > 80% Vne

>6000 DA: 30 deg when AS <= 80% Vne

>6000 DA: 15 deg when AS > 80% Vne

Service celing: 15 deg

Hovering Turns: <= 20,800 GW: 360 in >= 10 sec 20,800-24,300 GW: 360 in >= 15 sec

Landing:

Touchdown, power on: 60 kt

Touchdown, power off: 60 kt

VSI: Norm GW: 480 fpm Max GW: 360 fpm

Slope: Upslope: 10 deg Downslope: 10 deg Cross slope: 6 deg

Fuel: 200 lbs/side

G-lims:

20,800 lbs GW: +2.5, -0.5 G

23,300 lbs GW: +2.26, -0.5 G

24,300 lbs GW: +2.14, -0.5 G

Caution Lights:
(Amber)

Fuel Low: 14%, or 325 lbs fuel remaining (3 deg nose down)

Xmsn Oil Press: < 20 psi

Xmsn Oil Hot: > 110 C

Cont Boost: < 1000 psi

Boost Pump: < 3 psi

Util Hyd Hot: > 149 C

Ess Bus: Incorrect/No voltage on bus

Xmsn Chip: Chips detected

Gen Fail: Gen is inop, mainline contactor open, or Gen Off

DC Bus: Incorrect/No voltage on bus

Eng Oil: < 12 psi

AFCS Off: AFCS Inop or Off

Rotor Brake On: Brake is on.

IRCM: AN/ALQ-157 mlfxn

Eng AGB Chip: Chips detected

(Green) MNL Trim: Mnl trim activated, or fail-freeze

Eng Anti-Ice: Heating elements are below 4C with anti-ice on

Alt Hold On: Alt Hold is On

Park Brake On: Parking Brake is On

DASH Low Rate: DASH has failed or is slow until actuator, AS, stick pos, and attitude coincide. (Cyclic moves > 1”, moves >1.4”/sec, pitch is > 18 deg nose up)

Misc:

Ignition: 2 min on, 3 min off, 2 min on, 23 min off

Alt: 5 min on, 55 min off

Norm GW: 20,800 lbs

Max GW: 24,300 lbs

Tire Pressure: Main Gear: 180-185 psi Aux Gear: 150-155 psi

Max Cont Mission Operation: 8 hrs