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Forum: Military Aviation

16th Dec 2022, 15:50

Replies: 106

F-35 accident Fort Worth 15/12/22 - pilot ejected ok

Views: 54,357

Posted By Janner200

If the lift fan drive fails forward of the LP...

If the lift fan drive fails forward of the LP compressor, the power from the LP turbine is no longer being absorbed by the lift fan and the excess power will instantaneously accelerate the LP...

Forum: Rumours & News

12th Jan 2021, 06:11

Replies: 871

737-500 missing in Indonesia

Views: 963,811

Posted By Janner200

fdr Thankfully uncontained failures are...

fdr

Thankfully uncontained failures are rare, If it does occur however despite designing to keep critical systems and components outside the burst zone the final outcome is heavily dependant on...

Forum: Rumours & News

11th Jan 2021, 07:48

Replies: 871

737-500 missing in Indonesia

Views: 963,811

Posted By Janner200

The man on the left of post #147 photo is holding...

The man on the left of post #147 photo is holding what appears to be a section of the HP Turbine nozzle guide vane assembly. The damage is not what would be expected if the impact was the primary...

Forum: Rumours & News

14th Feb 2018, 09:06

Replies: 89

UA1175 emergency landing Honolulu

Views: 86,884

Posted By Janner200

Towards the end of cruise, the NL will be well...

Towards the end of cruise, the NL will be well below red line so to lose the intake and fan cowl doors as well - presuming the fan blade loss was the primary failure - is unexpected. The reports give...

Forum: Tech Log

17th Oct 2017, 08:42

Replies: 14

Open Rotor

Views: 6,043

Posted By Janner200

The RB211 fanshaft failures were due to LP...

The RB211 fanshaft failures were due to LP location bearing (intershaft) ball bearing wear/break-up that allowed excessive axial/radial movement that resulted in heavy rubbing of the air-oil seals....

Forum: Aviation History and Nostalgia

24th Jan 2016, 19:47

Replies: 5

Turbofan engine ID please?

Views: 1,614

Posted By Janner200

DH - it's not a roller as the blading indicates...

DH - it's not a roller as the blading indicates the shaft rotates the wrong way and there aren't any service pipes in the annulus.Could still be PW or GE on a747 Classic. Damage at rear of LPT...

Forum: Tech Log

17th Jan 2016, 13:49

Replies: 3

Engine vibration units

Views: 1,567

Posted By Janner200

Genghis - velocity (inches per second) is the...

Genghis - velocity (inches per second) is the normal parameter for engine vibration. I'm no expert on vibration, but the velocity is the product of frequency (number of cycles per second) and...

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