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Search: Posts Made By: Old Engineer
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Forum: Tech Log
8th Mar 2011, 18:03
Replies: 746
Views: 209,560
Posted By Old Engineer

Torsional stiffness

Just as background to the information posted by sound asleep, the torsional stiffness of a hollow prism (such as a wing) would depend on the area enclosed by the structural cross-section of object,...
Forum: Tech Log
18th Feb 2011, 04:01
Replies: 746
Views: 209,560
Posted By Old Engineer

That is a very interesting set of comments. I've...

That is a very interesting set of comments. I've been intending to put up some information about splines, spline design matters, and my thoughts on vibration related to splines. I just wanted to find...
Forum: Tech Log
30th Jan 2011, 18:36
Replies: 746
Views: 209,560
Posted By Old Engineer

Engine oil

Turbine D has drawn a little heat for asking some questions, in the last few posts above. But nonetheless one of Turbine D's questions was of considerable interest to me, that regarding the...
Forum: Tech Log
29th Jan 2011, 21:55
Replies: 746
Views: 209,560
Posted By Old Engineer

DERG wrote under the header First Failure as...

DERG wrote under the header First Failure as follows, today at 12:38:



This is a 15-page document. Four pages in at paragraph 2.3.c there seems to me to be a failure to comply, in the matter...
Forum: Tech Log
29th Dec 2010, 21:56
Replies: 746
Views: 209,560
Posted By Old Engineer

The ball thrust bearings - some background

My comments are based on, or inferred from, information which I believe was developed at Stonehouse. It was stated that it was believed to have possible application to a contemplated aircraft...
Forum: Tech Log
29th Dec 2010, 05:06
Replies: 746
Views: 209,560
Posted By Old Engineer

bearfoil Now there is resolution-- 14...

bearfoil

Now there is resolution-- 14 megapixels times 3 layers for the colors, I think. Is there a similar camera copy for the report showing the LP shaft that might show the condition of the...
Forum: Tech Log
28th Dec 2010, 04:53
Replies: 746
Views: 209,560
Posted By Old Engineer

firstfloor Yes, that is the...

firstfloor

Yes, that is the counter-argument. It is too bad that the CVR is not available.

Turbine D

I hadn't thought of the test machine, and you can't forget that bang. But with...
Forum: Tech Log
27th Dec 2010, 20:32
Replies: 746
Views: 209,560
Posted By Old Engineer

firstfloor wrote: Well,...

firstfloor wrote:






Well, let me agree (now that I've re-read the 12/3 ATSB report and the 12/8 interview with Sr Chk Capt (SSC) that I cannot know for sure that the FO took any action...
Forum: Tech Log
27th Dec 2010, 01:02
Replies: 746
Views: 209,560
Posted By Old Engineer

bearfoil Yes, I was going to try to...

bearfoil

Yes, I was going to try to time-correlate all that data as well, but I just never had time to do it, so Annex14's effort is appreciated.

On another tack on the issue of bearing...
Forum: Tech Log
26th Dec 2010, 23:18
Replies: 746
Views: 209,560
Posted By Old Engineer

bearfoil, Turbine D, and Annex14: Let me...

bearfoil, Turbine D, and Annex14:

Let me throw a little more grist into the mill that is grinding away on the behavior of the oil circuit:

Recall in the exclusive interview, the SrCheckCapt...
Forum: Tech Log
25th Dec 2010, 05:52
Replies: 746
Views: 209,560
Posted By Old Engineer

A possible source for the ball bearings that...

A possible source for the ball bearings that resist thrust in this part of the engine is New Hampshire Ball Bearing, HiTech Division. Airbus notes their product as being in the A380. The bearings...
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