Pneumatic starter motor??
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Pneumatic starter motor??
I'm hoping that someone might be able to answer a couple of questions?
1) Where is the hot bleed air that is used to drive the pneumatic starter on a turbofan engine expelled?
2) How is the starter connected to the N2 shaft so that it doesn't block the passage of the bypass air from the N1 fan? (considering that the starter is housed on the outside of the engine?
1) Where is the hot bleed air that is used to drive the pneumatic starter on a turbofan engine expelled?
2) How is the starter connected to the N2 shaft so that it doesn't block the passage of the bypass air from the N1 fan? (considering that the starter is housed on the outside of the engine?
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This is from a CF6-50 engine. Other engines have different location of the accessory gearbox.
In the picture above you can see the location of the starter in relation to the fan.
Above is a picture of the starter. Bleed air enters at the front and is expelled out through the mesh into the nacelle. It is eventually discharged overboard through vents in the cowling.
Above is a picture of how the starter is connected to the HP spool via the accessory gearbox, transfer gearbox and tower-shaft.
In the picture above you can see the location of the starter in relation to the fan.
Above is a picture of the starter. Bleed air enters at the front and is expelled out through the mesh into the nacelle. It is eventually discharged overboard through vents in the cowling.
Above is a picture of how the starter is connected to the HP spool via the accessory gearbox, transfer gearbox and tower-shaft.