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| Handling Notes |
|
| Lockheed L.414 Hudson I (Controllable Prop Demonstrator) |
|
|
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| 3/2011 |
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Lockheed L.414 Hudson I Pilot's Handling Notes
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The two Wright R-1820-G102A Cyclone dual fuel engines
have automatic mixture controls, and are carburetted with manually applied carb
heat controls. These engines drive Hamilton Standard controllable two pitch
aircrews optimised for take off and anti submarine patrolling. They are rated
900hp at 2300 RPM at 6700 feet (ISA).
Use of 92 Octane military grade fuel (or better) allows
use of full throttle and below 600 feet (ISA) it is then permissible to
generate 43.5 inches MAP, and up to 2350 RPM, thus generating 1100hp for up to
five minutes for TOGA and WEP. While running on airline grade (87 Octane) AVGAS
these engines must instead be throttled to 37.5 inches MAP and 2300 RPM.
These engines have (need) no cowl flaps.
WARNING: Compliance with the relevant MAP limit will not
prevent engine overspeed.
WARNING: With military grade fuel (or better) DO NOT EXCEED
2350 RPM.
WARNING: With airline grade fuel DO NOT EXCEED 2300 RPM.
WARNING: AVOID - RUNNING Cyclone engines UNDERSQUARE (MAP
must always exceed RPM divided by 100).
WARNING: CRITICALLY WEAK FLAPS - Vfe = 115 MIAS
This Hudson I is loaded with the maximum possible =
normal 4,080lbs of British high lead, high density, 87 Octane AVGAS. Bombload
is therefore restricted to 2 x 250lb anti submarine bombs.
This aircraft is unpressurised and the five crew have no
oxygen supply. Under King's Regulations do not exceed FL100 by day or FL80 by
night.
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Take Off and Obstacle Clearance phase:
PITCH =
FINE
<<<<<<<<<<<<
CARB HEAT = COLD
FLAP = STAGE 1
(10 degrees)
TRIM = 9
degrees (45%) UP (to target Vx)
LINE UP
BRAKES = ON
MAP = 34.5
inches ( 87 Octane Fuel)
BRAKES = OFF
YOKE =
NEUTRAL
ROTATE = 90
MIAS (Vr)
GEAR = UP
ACCELERATE = 110 MIAS
ACHIEVE = 200 feet AGL
Above all local obstacles:
PITCH =
COARSE
<<<<<<<<<<<<
FLAP = UP
VSI =
minimal or zero
ACCELERATE = 135 MIAS
COMMENCE = Climb
phase
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MAP = 34.5 inches
IAS = 135 MIAS
Anti sub patrol typically FL65
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IAS = 135 MIAS
MAP = as required
RADAR = SEARCH
Plan = 300 PPH
Yield = 130 KTAS at FL65
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Tactical (day bomber) cruise:
MAP = 25 inches
Plan = 500 PPH
Yield = 174 KTAS at FL100
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Max Cruise:
MAP = 29 inches
Typically 670 PPH
Typically 198 KTAS
at FL100
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Arrival = Descent phase:
VSI = vary to
deliver
IAS = prior
cruise IAS
MAP = OVERSQUARE
(follow RPM down)
Prior to IAF, hold or circuit:
MAP = OVERSQUARE (follow RPM down)
VSI = 0
IAS = 135 MIAS
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Holding phase:
FLAP = UP
IAS = 135 MIAS
MAP = as required
Plan = 300
PPH
HOLD until < 15,650lbs = MLW
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Before descent to MDA:
IAS = 135 MIAS
FLAP = UP
On Descending to MDA:
MAP = trickle barely oversquare
IAS < 155 MIAS
When maintaining MDA:
IAS = reduce to 135 MIAS
MAP = oversquare
Look for landing runway
Adjust to circuit altitude
Downwind in visual circuit:
GEAR = DOWN
WHEN IAS < 115 MIAS
FLAP = STAGE 2
IAS = 110 MIAS
PITCH = FINE
<<<<<<<<<<<<<
Final in visual circuit:
To achieve Vref = 85 MIAS (at 14,000lbs)
FLAP = STAGE 3
MAP = INCREASE if
necessary
Cross airfield boundary @ 85 MIAS
MAP = UNDERSQUARE ALLOWED
FLARE and LAND
BRAKES as required
Clear of runway:
FLAP = UP
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Straight In Approach:
Avoid if possible!
Before descent to MDA:
IAS = 135 MIAS
GEAR may be used
as brake
IAS = 110 MIAS
FLAP = STAGE 1
IAS = 110 MIAS
MAP = as required
On Descending to MDA:
FLAP = STAGE 2
MAP = do NOT
alter
VSI = minus 600
UNTIL = MDA
Look for runway lights
Only while maintaining MDA:
IAS = 110 MIAS
MAP = as required
Look for runway lights
ONLY IF visual with runway:
On descending:
GEAR = DOWN
PITCH = FINE
<<<<<<<<<<<<<
To achieve Vref = 85 MIAS (at 14,000lbs)
FLAP = STAGE 3
MAP = INCREASE if
necessary
Cross airfield boundary @ 85 MIAS
MAP = UNDERSQUARE ALLOWED
FLARE and LAND
BRAKES as required
Clear of runway:
FLAP = UP
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