Engines JetStream 31

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    EnginesEngines

    andand

    PropellerPropeller

    Turbine

    Engine

    PanAm International Flight Academy, Inc. 2001

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    Garrett TPE-331

    dash 10 for the 3100

    dash 12 for the 3200

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    Single shaft comprising

    2 centrifugal compressors

    reverse annular urn

    ! stage a"ial turines

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    #eduction $ear

    converts engine #P% to Prop #P%

    drives accessory section

    starter

    oil pumps

    hydraulic pumps

    fuel pumps

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    &onstant Speed Prop

    pitch of lades

    varies to provide

    thrust

    #P% remainsconstant

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    Engine is high RPM with low Torque (41,30 RPM!

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    gear"o# $on%erts this to

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    Pro&eller with low RPM and 'igh Torque (1,)1 RPM!

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    engine &uts out a"out 4000 'P

    redu$tion gears $onsu*e a"out 3000 'Plea%ing a"out 1000 'P for the Pro&

    )40 'P for the 3100

    1020 'P for the 3200

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    %easurements

    'or(ue

    primary instrument for setting po)er

    *$'

    temperature is the enemy, so )e monitor

    #P%measured at gearo", so oth engine and

    propeller #P%

    dual gauge for precision

    primary instrument for determining ifengine running or not

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    Sections

    Air Flo)

    &ompressed

    &ompressed again

    ')o 1+0s and

    ignited

    Another 1+0 turn

    *nergy turns the turines

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    Airflo) station numersStation 1 - amient

    Station 2 - inlet pressure and temperature

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    P2 &ro"e - &ressure at station 2

    so*eti*es a P2+T2 &ro"e - &ressure and te*&erature

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    Station !

    &ompressor outlet

    Point of highest pressure- tap off air for air conditioning, anti-ice etc.

    P! air

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    Station - 'urine Inlet

    &ritical temperature areaPoint of highest speed and energy

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    *ngine 'emperature %easurement

    'I' - measured at the 'urine Inlet

    I'' - measured et)een 'urine stages

    *$' - measured at the *"haust pipe

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    Station / - *"haust area

    *"haust $as 'emp area

    some engines also measure pressure at

    this point and compare to P2 *P#

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    *ngine &ooling

    one cooling inlets and outlets

    *"haust pipe cooling is a special case

    ot *"haust $ases

    Fuel 'an3

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    Scarf 4o55les

    6cup7 in e"haust stream to force air circulation around e"haust

    pipe

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    ooing u& tail&i&e

    .$arf no//les

    *$' proes

    8viously, scarf no55les introducing cool air have to e do)nstream

    from the *$' proes

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    8il System

    lurication of the gearo"

    cooling

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    8il #eservoir

    engine left side

    availale to pilot through

    access panel

    4ote the 9nfeather Pump

    )ill discuss later, ut

    note for no) that itta3es oil directly from

    the reservoir.

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    #eservoir

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    Access to oil reservoir

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    8il 'emperature

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    8il temperature Indication

    Same gauge as 8il Pressure

    :o)nstream of reservoir, prior to

    engine driven pressure pump

    8il temperature ;imitations

    minimum for ta3e off // tor(ue 110 #P%

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    Huestions on the 8I; system

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    Huestions on the *ngine