RB211-524G/H-T
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RB211-524G/H-T
Hey all,
Just 2 quick questions with regard to the RB211-524G/H-T engine. Having studied the left hand side of the IP/LP turbine case, there seems to be what looks like a TCC (Turbine Case Cooling) inlet. The first question is, could someone please corroborate this? I know that the earlier RB211-535E4 engine, has an IPT TCC inlet located on its turbine case that is fed with bypass air. The cold air is then fed to the TCC inlet via ducting on the underside of the C duct reverser half to control case expansion and subsequent blade tip clearances.
My second question therefore is, due to the fact that the 524G/H-T doesn't incorporate 2 C duct reverser halves (it's 1 unit), from where would the bypass air be collected from and how would that air be ducted to the TCC inlet?
Many thanks folks!
Just 2 quick questions with regard to the RB211-524G/H-T engine. Having studied the left hand side of the IP/LP turbine case, there seems to be what looks like a TCC (Turbine Case Cooling) inlet. The first question is, could someone please corroborate this? I know that the earlier RB211-535E4 engine, has an IPT TCC inlet located on its turbine case that is fed with bypass air. The cold air is then fed to the TCC inlet via ducting on the underside of the C duct reverser half to control case expansion and subsequent blade tip clearances.
My second question therefore is, due to the fact that the 524G/H-T doesn't incorporate 2 C duct reverser halves (it's 1 unit), from where would the bypass air be collected from and how would that air be ducted to the TCC inlet?
Many thanks folks!
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there seems to be what looks like a TCC (Turbine Case Cooling) inlet
The scoop/duct you see, (which is also duplicated on the R/H side) feeds air into the "interservices" area. This air cools the area but the main reason for this air is to feed the "Fan Air Metering Valve" which directs air to the pre-cooler, which cools the engine bleed air before being delivered to the airframe.
The first question is, could someone please corroborate this?
My second question therefore is, due to the fact that the 524G/H-T doesn't incorporate 2 C duct reverser halves (it's 1 unit), from where would the bypass air be collected from and how would that air be ducted to the TCC inlet?
Last edited by Spanner Turner; 28th Dec 2012 at 12:05.
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I know that the earlier RB211-535E4 engine, has an IPT TCC inlet located on its turbine case