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Search: Posts Made By: Ferpe
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Forum: Rumours & News
7th May 2019, 07:48
Replies: 482
Views: 1,022,889
Posted By Ferpe

Landing bounce most probably caused by PIO

When I saw the bounce video I immediately thought they were in direct law. This is now confirmed by the Russian interviews with the Pilot. The SSJ FBW is very good according to pilots I've spoken...
Forum: Rumours & News
28th Mar 2019, 05:39
Replies: 5,109
Views: 13,251,828
Posted By Ferpe

infrequentflyer789 answered the question. Stall...

infrequentflyer789 answered the question. Stall ID is Boeing speak for when the SYMD has identified an AoA above the stall threshold for a 737ng. This triggers Stick shaker, Increased stick force...
Forum: Rumours & News
27th Mar 2019, 08:07
Replies: 5,109
Views: 13,251,828
Posted By Ferpe

We have full Stall ID in the case of JT610 by a...

We have full Stall ID in the case of JT610 by a margin of some 10 degrees. Stall ID on the 737ng triggers: Stick shaker, Feel pressure increase and trim actions very similar to MCAS (though with the...
Forum: Tech Log
27th Nov 2013, 16:51
Replies: 53
Views: 29,505
Posted By Ferpe

Why icing in 2 spool and not 3 spool?

I happen to have the temp versus station diagrams for the GEnx and the T1000 (I analyze engines over at Airliners.net) so I thought I post them here as well, here the link to the Airlines post:
...
Forum: Tech Log
26th Jan 2011, 06:59
Replies: 746
Views: 210,934
Posted By Ferpe

There is one piece of evidence to what is the...

There is one piece of evidence to what is the root cause of the oil pipe cracking which has not been debated here. In the court filing that Qantas filed there is the following statement (from...
Forum: Tech Log
26th Dec 2010, 11:54
Replies: 746
Views: 210,934
Posted By Ferpe

Thanks Turbine D for your analysis, to me it...

Thanks Turbine D for your analysis, to me it makes sense.

You seem to know your way around a jet turbine:) (guess your name stands for turbine designer, is 70 correct though or are you still...
Forum: Rumours & News
24th Dec 2010, 10:45
Replies: 1,964
Views: 1,341,569
Posted By Ferpe

Yes, the between HP and IP shafts there is a...

Yes, the between HP and IP shafts there is a space where the oil can go outwards (red 1 in picture) and follow the IP shaft forwards, there seems to be a labyrinth between the IP and HP shafts at the...
Forum: Rumours & News
23rd Dec 2010, 18:15
Replies: 1,964
Views: 1,341,569
Posted By Ferpe

TheTrent 500 cutaway is very good, one can...

TheTrent 500 cutaway is very good, one can clearly see the bearing box and the scavange oil pipe going downward from the box. Here how such a box works in principle:

...
Forum: Rumours & News
8th Dec 2010, 04:26
Replies: 1,964
Views: 1,341,569
Posted By Ferpe

Aerodynamic transfer of thrust

@Blade Master

as stated before in this thread 95% or more of the thurst is transfered via aerodynamic pressure differences between rotor discs and the casing walls in the different cavities in the...
Forum: Rumours & News
6th Dec 2010, 05:19
Replies: 1,964
Views: 1,341,569
Posted By Ferpe

Stub oil pipe

Hi guys,

think I found a picture of where the stub pipe is, it takes the lube oil the last bit from the inner casing to the bearing box (arrow):
...
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