Powerplant Flashcards

0
Q

Qual a relação entre TQ e NP na definição do POWER?

A

Inversamente proporcionais
+TQ -NP
-NP +TQ

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1
Q

Quais os power ratings (SHP) e limites de tempo para RTO, TO e MCT?

A
RTO = 2.750 SHP limitado a 10 min
TO = 2.475 SHP limitado a 5min
MCT = 2.500 SHP Sem limite
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2
Q

Com quantos % de NH, abre-se o combustível para que haja ignição do motor?

A

10%

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3
Q

Capacidade do tanque de óleo do motor

A

14.4 L

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4
Q

Características da IGNITION

A
  • Alimentado pela DC ESS BUSS
  • dispara de 5 a 6 centelhas durante 25” no starter
  • caso haja indicação de NH abaixo de 60%, A+B entra automaticamente
  • caso haja indicação de NH abaixo de 30%, o IGNITION fica inibido por considerar flame out
  • se o EEC nao estiver selecionado, pode-se ativar o IGNITION através do MAN IGN Pb
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5
Q

Propeller control

A

PIU lê os parâmetros manualmente estados pelo piloto, envia os dados para a PEC, que os analisa e junta com parâmetros externos (altitude, airspeed) e envia um sinal para a PVM, a qual automaticamente controla os parâmetros de sincronismo das hélices.

PIU = propeller interface unit
PEC = propeller electronic control
PVM = propellervalve module
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6
Q

Ângulos de passo considerados pela PVM (propeller valve module)

A

-14 degrees (reverso) < Bref (passo 0) < 78,5 (feather)

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7
Q

Características do HOTEL MODE operation

A
  • supre a acft com energia DC e gera ar condicionado
  • não há rotação de hélice
  • consumo de 110kg/h de combustivel
  • limite de tailwind para acionamento: 10kt
  • não acionar com a service door aberta
  • ao chegar de voo,coma NP em 20%, pode-se travar a hélice
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8
Q

Normal Operation (sem hotel mode)

A
  • Realizado com 2 ou motor,

- CL deve estar em AUTO

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9
Q

Nacele overheat

A

Ocorre somente no motor #2 com 170 degrees ( o #1 não tem nem sensor)

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10
Q

Motor do atr 600

A

PW 127M

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11
Q

Componentes da Reduction Gear Box (RGB)

A

– the ACW generator
– the Propeller Valve Module (PVM)
– the propeller pump (HP) and overspeed governor
– the auxiliary feathering pump
– the propeller brake (on RH engine only)

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12
Q

ACCESSORY GEAR BOX driven by the HP spool Drives:

A
  • the DC starter/generator
    – the HP fuel pump
    –the engine oil pumps
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13
Q

Com a CL em AUTO, a % de NP entregue nas posições do PWR MGT (TO, MCT, CLB, CRZ) são:

A
  • TO → NP = 100%
    – MCT → NP = 100%
    – CLB → NP = 82%
    – CRZ → NP = 82%
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14
Q

ATPCS works…

A

ARM on ground:
- PWR MGT = TO
- PL 1+2 > 49 degrees and both TQ > 46%
# caso haja pelo menos 1 TQ < 18% ocorre UPTRIM no motor bom e após 2.15 segundos…
- UPTRIM no motor bom + Autofeather no motor afetado para ajudar na performance. Uma vez que ocorra essa situação, para cancelar, somente tirando a PWR MGT de TO ou o ATPCS Pb OFF ou PL1 or 2 retarded.

ARMED in FLIGHT = Autofeather ativado no motor afetado
OBS : em voo normal, após tirar o PWR MGT de TO, o ATPCS desarma.

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15
Q

EEC Pb works…

A

Controls the EEC of the associated engine

ON : (pb pressed in) EEC adjusts HMU action, by controlling the stepper motor which lowers fuel flow ordered by HMU.

OFF : (pb released) The HMU controls only NH as a function of PL angle. OFF light illuminates white.

FAULT : When EEC failure is detected: Flashing amber :The fuel flow is frozen to maintain the power, when FAULT flashes, never deselect the EEC. Retard first, the PL in the green sector (FAULT become steady: PL < 52°) Reversion to HMU base law is achieved when the PL are retarded in the green sector Steady amber : automatic reversion to HMU base law

16
Q

HMU (HydromechanicalUnit) works…

A

Controla a dosagem de combustível e devolve o excesso (controla a mistura.

  • TOP LAW (acft voa com EEC ativo)
  • BASE LAW (acft voa com EEC fora - tipo carburador e diminui a potência do motor para preservá-lo)