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Bell 205A1, UH-1H
Inlet Barrier Filter (IBF) System
Bell 205A-1, TC UH-1H
Bell 205A1, UH-1H
● Maximum engine debris/FOD protection which allows
consistent flight operations and extends engine time on
wing. Improved protection over an inertial design and
significantly better protection than a FOD screen.
● Pleated barrier filter element provides improved air flow
versus inertial separation vortex/swirl tubes typical with
IPS.
● Return on Investment (ROI):
• Less premature engine removals, meet expected engine TBO.
• Long-life filter assemblies, 4,500 hour (15 - 300 hour
intervals).
• Reduction in corrosive salt air entering engine.
• Engine overhaul cost reduction due to elimination of erosion
and contamination on all rotating and pneumatic
components.
• Reduced maintenance time with improved plenum access.
• Common Line Replaceable Units (LRU) for mixed IBF fleets.
• Bleed air system maintenance eliminated with IBF.
Donaldson IBF Benefits
Bell 205A1, UH-1H
● Operational Considerations:
• Improved power margin for high/hot operations and
confined landing zones. Certified for operation with
basic inlet charts.
• Engine performance retention after barrier filter
installation.
• Inlet air bypass system backup not available with IPS
for added safety margin.
• Certified for flight in falling and blowing snow IAW
helicopter manufacturers flight manual requirements.
• Improved engine inlet and drive shaft access.
• Common components with other Donaldson certified
systems.
• Integrated engine water wash capability does not
require filter removal.
• Over 10 pounds lighter than IPS.
• IBF environmental cover included with kit.
Donaldson IBF Benefits
Bell 205A1, UH-1H
● IPS utilize traditional inertial particle separation technology,
barrier filter uses current technology and state of the art
integration.
● Barrier filter does not require the use of engine bleed air as the
IPS does which reduces engine power available.
● Inertial separation vortex/swirl tubes routinely become clogged
with straw, leaves and bugs degrading performance, barrier filter
is immune to this type debris and operates without degradation.
● Barrier filters have significantly higher separation efficiency
than inertial separators. Barrier filter typically >99% capture
efficient on ISO Coarse & Fine dust, inertial separator typically
<96% capture efficiency on ISO Coarse dust and far less on ISO
Fine dust.
● Barrier filters are effective regardless of engine power setting,
inertial separators only effective when they have adequate
engine bleed air typically available above flight idle power
setting.
● Significant decrease in fine sand ingestion reduces engine
erosion damage, offsite landings in unprepared sites no longer a
concern.
● Engine bleed air system maintenance eliminated along with
chance of engine stall margin reduction from leaking valves and
lines.
● IBF is approximately 10 lbs lighter than EAPS.
Donaldson IBF System Considerations
Bell 205A1, UH-1H
● Key Features:
• Sealed plenum design composed of sheet metal,
machined aluminum and composite parts.
• Donaldson IBF replaces Engine Air Particle Separator
(EAPS), Improved Particle Separator (IPS) or FOD screen
assemblies.
• Upper plenum houses 4 filters and mounts to aircraft
structure similar to IPS.
• Compression seal between upper & lower inlet plenum.
• Actuator driven dual bypass doors, actuator common with
Donaldson Bell 407 and 206L-3/4 IBF.
• Lower plenum mounts to engine front face.
• Dual bypass door to eliminate distortion in bypass
operational mode.
• System disassembles in 5 Pieces.
• Quick Release Latches and Fasteners.
• Optional FOD screen configuration interchangeable with
barrier filter assemblies.
Donaldson IBF Features
Bell 205A1, UH-1H
Donaldson IBF Features
Dual Bypass
Doors
FMA
US Patent
6,595,742
Bell 205A1, UH-1H
Donaldson IBF Features
Interchangeable
FOD Screens
Engine Water
Wash Fittings
Bell 205A1, UH-1H Previous 205/UH-1H EAPS & IPS Systems
Pleated Screen/Foam Filters
With FOD Screen Improved Particle Separator
(61 Lbs)
Inertial Particle Separator
With Pleated Screen
Bell 205A1, UH-1H
Each engine mount
shimmed up to .300
inch to align engine
with transmission.
Lower
plenum
mounted to
engine.
Different
engine
shimming
adjustments
on individual
aircraft shift
position of
lower plenum
to adjust for
aircraft to
aircraft
variations.
Upper
plenum
mounted to
fixed
structural
deck.
IBF Installation
Sealed upper and lower plenum to restrict unfiltered air from entering engine inlet
Bell 205A1, UH-1H
Donaldson IBF Flow Path
Airflow
Hover Air to
Side Filters
Hover Air to
Upper Filters
Transmission
Bay
Forward
Flight Airflow
Hover Airflow
Bell 205A1, UH-1H
Access and Basic Components
Step 1 Step 2
Remove
Upper Plenum
(4 Bolts)
Remove Upper
Inner Duct Assy
(4 Latches)
Bell 205A1, UH-1H
Step 3 Step 4
Remove Lower
Driveshaft
Cover Assy
(4 Bolts, 4 Stud Nuts)
Remove OEM
Drive Shaft
(2 V-Band Clamps)
Remove Lower
Plenum Assy
(8 Bolts)
Access and Basic Components
Bell 205A1, UH-1H
Step 5
Remove Inlet
Ring Assy
(1 V-Band Clamp,
18 bolts)
Component
Est.
Weight
(Lbs.)
4 Filters** 19.6
Upper Plenum
Assy 16.1
Upper Inner Duct
Assy 1.7
Lower Plenum
Assy 6.1
Inlet Ring Assy 7.7
Total 51.2*
Access and Basic Components
*IPS & Drain Weight = 65 lbs
**Weight of dirt not included
Bell 205A1, UH-1H
● Common cockpit switch with the Donaldson IBFs for the Bell 205A, 206L-1/3/4, 407, 430, AgustaWestland AW119, AW139, Airbus AS350, EC130.
● Easily viewed and accessed cockpit annunciator/switch for bypass operation.
● LED illuminated, momentary push button (Optional NVIS Yellow Class B compatible).
● “FILTER” - indicator illuminated based on signal from differential pressure sensor, Caution - high pressure drop indication.
● “BYPASS” - illuminates whenever the bypass door is open based on door position switch, Caution – Bypass is open.
● “FILTER” - indicator will also extinguish once door opens and pressure drop has been reduced, redundant indication for pilot.
Donaldson IBF System Cockpit Switch
Bell 205A1, UH-1H
● Pre and Post flight indication of filter contamination level, maximum pressure drop.
● Allows flexibility for mission planning with predictable service cycles, particularly in high tempo desert environments.
● Verification of post cleaning effectiveness.
● Provides the capability for “On Condition Maintenance,” between established cleaning intervals, eliminating unnecessary service.
● Measures plenum pressure versus ambient, across the filter system.
● Similar FMA used on other Donaldson IBFs for the Bell 205A, 206B, 206L-1/3/4, 407, 430, AgustaWestland AW119, AW139, Airbus AS350, EC130, MD Helicopters MD500.
Donaldson IBF System
Filter Maintenance Aid (FMA)
Bell 205A1, UH-1H
Donaldson IBF Compatible with ‘Eagle Single’ Conversion
Eagle Copters’ ‘Eagle Single’ can be equipped with
the Donaldson IBF System
For Maximum Engine Protection
Bell 205A1, UH-1H
Bell 205/UH-1H, Huey II IBF System
Current Operators ● U.S. Department of State Air Wing – Worldwide (Afghanistan, Pakistan)
● Cal Fire/California Dept. of Forestry – California
● Vancouver Island Helicopters – Canada/Worldwide
● Coast to Coast Helicopters – Canada
● Custom Helicopters – Canada
● Tunisian Air Force - Tunisia
● Great Slave Helicopters – Canada
● Heli-Excel – Canada
● Kachina Aviation – Idaho/Nationwide
● Pacific Valley Aviation - California
● PJ Helicopters – California/Nationwide
● San Diego Sheriff Air Unit – California
● Summit Aviation – Virginia/Nationwide
● Mustang Helicopters – Canada
● National Research Council – Canada
● Pacific Western Helicopters – Canada
● Prism Helicopters – Canada
● Kern County Fire Dept. – California
● Kern County Sheriff – California
● Colombian National Police – Colombia
● Royal Thai Air Force – Thailand
● Iraqi Air Force – Iraq
● Yemeni Air Force – Yemen
● Georgian Air Force – Georgia
● Yellowhead Helicopters – Canada
● Bell Helicopter – Ozark, Alabama
● Northwest Helicopters – Washington
Bell 205A1, UH-1H
Donaldson Contact Information
Aerospace Americas (636) 300-5221 [email protected]
Aerospace Europe 00 800-63292750 [email protected]
