B-52 Utility system

Windshield wipers

Eliminates excessive moisture

Variable speed control switch location

Pilots forward instrument panel

Variable speed control, how many positions and what are they

6 positions, park, off, full, 3/4, 1/2, low

Electric motor

2 each

• provides rotary motion

Converter

2 each

• changes rotary motion from motor to oscillating motion

How many wiper blades

2 each

Bleed air

Provides air for engine start, reservoir pressurization, cabin pressurization, air conditioning, and engine anti-icing

Bleed air is provided by

15th stage engine compressor

Ground service receptacle

Manifold switch is located

Copilots side panel

Manifold switch directs

Bleed air from left side to right side

Anti-icing

Prevents icing on engine inlets, ram air scoop, ram air inlets, and pitot tubes

Anti-icing switches located

Pilots forward instrument panel

Engine nacelle

To anti ice critical areas of the fan inlet

Engine nacelle allows

bleed air from the engine to circulate within the inlet guide vane shroud

Air conditioning ram air scoop

Engine bleed air is used around the ram air scoop lip (left inbd. CE wing)

Retractable ram air scoop/q spring ram air inlet

Anti-iced by heating element

Air conditioning

Receives air normally from no.2 nacelle, no. 3 nacelle alternate

Temperature switch located

Copilots side panel and navigator’s station

Heat exchanger (pre-cooler)

No. 2 nacelle

Cools 15th stage air

Air conditioner pack (acp)

Maintains temperature range selected by crew

Air conditioner pack (acp) located

Left forward MLG wheel well

Air vents located

At each ejection seats

Bleed selector switch

-center aisle stand

Normal LH INBD -No.2 nacelle

emergency RH INBD -No. 3 nacelle

Bleed selector switch

-Open manifold (crossover) valve

To allow no.3 nacelle to operate acp

Cabin pressurization

Allows crew to operate at high altitudes

Cabin pressurization uses

The air conditioning system by holding a varying back pressure on an almost constant airflow for pressuring the cabin

Cabin pressurization master switch location

Forward end center aisle stand

Cabin pressurization master switch

Rotary switch with off - ram - 7.45 PSI and combat (4.50) positions

Pressure release switch

• dump position

Electrically operated dump valve

Pressure release switch

• reset position

Closes valve after dumping