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15th Aug 2022, 20:48
Replies: 225
Views: 42,930
Posted By iranu

Here are my own thoughts: Mirror...

Here are my own thoughts:

Mirror image/reflection in water.

There are a few debunkers who are speculating that the symmetry of the "UFO" (for want of a better word) in the image could be caused...
15th Aug 2022, 19:21
Replies: 225
Views: 42,930
Posted By iranu

I did some analysis: Someone overlaid part of the...

I did some analysis: Someone overlaid part of the photo with the view that is claimed the point the photo was taken from. Here is the brief Youtube video. It's bang on. Yes the fence posts aren't...
25th Sep 2021, 13:15
Replies: 108
Views: 49,036
Posted By iranu

I very much doubt it. In order to lift this...

I very much doubt it. In order to lift this thing onto the truck and get it onto the RCS pole it will require a crane to do the job. Considering the position is directly opposite the RCS pole...
26th Jul 2021, 19:38
Replies: 160
Views: 59,581
Posted By iranu

I believe extensive studies were performed at the...

I believe extensive studies were performed at the time and the complications were more significant than first realised. The reduction in fuel burn over the rest of the life-time of the fleet wasn't...
8th Jun 2021, 08:46
Replies: 7,437
Views: 2,385,708
Posted By iranu

You don't, you sail the QE in a task force with a...

You don't, you sail the QE in a task force with a US carrier that can. We now have a capability far greater than what we used to have and one we can actually afford. The cats/traps, nuke propulsion...
1st Jun 2021, 23:53
Replies: 3
Views: 1,202
Posted By iranu

BL14902 is highly likely the part number. RR is...

BL14902 is highly likely the part number. RR is typically Rolls Royce. RR633 is more likely to be an engine type rather than a Rolls Royce Material Specification i.e what alloy the blade is made...
9th Mar 2021, 11:46
Replies: 7,437
Views: 2,385,708
Posted By iranu

These articles always appear at the time of...

These articles always appear at the time of defence reviews and always get the same response. Capping at 48. Buying a mix of C and B. Mothballing one carrier. Navalised Typhoon! Navalised...
8th Mar 2021, 12:39
Replies: 288
Views: 260,416
Posted By iranu

Dye pen can only be used on the outer surface. ...

Dye pen can only be used on the outer surface. The method of flaw detection for internal surfaces is Thermal Acoustic Imaging (TAI). This is a P&W technique developed in 2005 for the specific...
4th Mar 2021, 11:47
Replies: 621
Views: 76,807
Posted By iranu

Trajectory: Courtesy of Jack Beyer on Twitter

Trajectory:

Courtesy of Jack Beyer on Twitter
24th Feb 2021, 14:54
Replies: 288
Views: 260,416
Posted By iranu

DaveReidUK Probably because that's the part...

DaveReidUK

Probably because that's the part description as per the drawing as well as what's in the engine/overhaul manual.

The PW4000 series is a 2 spool engine with a fan (LPC 1) and 4, 5, 6...
24th Feb 2021, 14:28
Replies: 288
Views: 260,416
Posted By iranu

Feathers McGraw This process is known as...

Feathers McGraw

This process is known as superplastic forming and diffusion bonding (SPF/DB).
20th Dec 2020, 23:48
Replies: 33
Views: 13,564
Posted By iranu

Here's the info regarding RB-199 post...

Here's the info regarding RB-199 post introduction development:


https://cimg1.ibsrv.net/gimg/pprune.org-vbulletin/791x1018/1986_08641024_1_f3cd802a93895140f09d82f164c2942bc0e4c11a.jpg...
20th Dec 2020, 13:27
Replies: 33
Views: 13,564
Posted By iranu

He wouldn't have required a ladder coming out the...

He wouldn't have required a ladder coming out the other end either. :yuk:.
20th Dec 2020, 13:07
Replies: 33
Views: 13,564
Posted By iranu

There were a number of programmes ongoing...

There were a number of programmes ongoing throughout the life of the engine to improve performance and reliability. Need to get my post count to 10 before I can post pictures/urls as I found some...
18th Dec 2020, 22:16
Replies: 33
Views: 13,564
Posted By iranu

I was a member of the RB-199 Repair Engineering...

I was a member of the RB-199 Repair Engineering team at RR Filton towards the end on the 1990s. I never came across anything to suggest that individual engines were configured for low v medium/high...
19th Nov 2020, 11:07
Replies: 96
Views: 69,436
Posted By iranu

Just to add to DaveReidUK's comment. The pictures...

Just to add to DaveReidUK's comment. The pictures posted of the disc segment with blade roots and 2 damaged blades still attached is a fan disc (LPC) not a turbine disc.

I can't post links, but...
23rd Dec 2017, 22:16
Replies: 12,075
Views: 3,595,277
Posted By iranu

It's off topic, but: Availability of Rhenium...

It's off topic, but:

Availability of Rhenium will not be an issue when ceramic matrix composite (CMC) turbine blades become the norm.

I was involved with research into ceramic materials for...
3rd Nov 2015, 16:38
Replies: 2,082
Views: 2,489,986
Posted By iranu

Third time lucky. AIRWORTHINESS DIRECTIVE ...

Third time lucky.

AIRWORTHINESS DIRECTIVE

AD No.: 2014-0177

Date: 25 July 2014

Fuselage – Rear Fuselage Clips, Shear Webs and Angles –
Replacement
3rd Nov 2015, 08:58
Replies: 2,082
Views: 2,489,986
Posted By iranu

Not sure if my original post is still in...

Not sure if my original post is still in moderation or got binned. However, considering the above and subsequent drawings I'll repost.

2014-0177 : Fuselage – Rear Fuselage Clips, Shear Webs and...
8th Jan 2014, 04:36
Replies: 12
Views: 3,156
Posted By iranu

I was working on Shaped Metal Deposition (SMD)...

I was working on Shaped Metal Deposition (SMD) using Ti 6/4 over 10 years ago. This isn't quite the same as 3D printing of metal parts using l@ser sintering of powders, but gives similar results and...
Forum: Rotorheads
2nd Dec 2013, 16:25
Replies: 2,934
Views: 2,212,147
Posted By iranu

PW206B Engine

Someone was asking about how the engines power the gear box.

http://img223.imagevenue.com/loc1169/th_001536673_PW2040B_122_1169lo.jpg...
Forum: Rotorheads
2nd Dec 2013, 16:16
Replies: 2,934
Views: 2,212,147
Posted By iranu

schematic EC135 MGB

Schematic for MGB - hope this helps people to visualise the mechanics as asked for previously.

(click thumbnail for bigger picture)
...
Showing results 1 to 22 of 22


 
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