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Search: Posts Made By: JohnFTEng
Showing results 1 to 35 of 41
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Forum: Tech Log
17th Apr 2020, 16:59
Replies: 16
Views: 6,461
Posted By JohnFTEng

Re the bloody great pin that some steel alloys...

Re the bloody great pin that some steel alloys are rated at 100 tons per square inch in tension. So not too many pins are needed to support the air loads. Probably more for redundancy in multiple...
Forum: Tech Log
29th Mar 2020, 13:02
Replies: 7
Views: 2,202
Posted By JohnFTEng

IIRC they got the lift distribution wrong at...

IIRC they got the lift distribution wrong at design stage and only found it at early flight test. Quick solution was to reduce TE torque by cutting back outboard area. This from memories reAding...
Forum: Safety, CRM, QA & Emergency Response Planning
20th Feb 2020, 08:32
Replies: 74
Views: 54,490
Posted By JohnFTEng

Early 70's on Jaguar flight test one prototype...

Early 70's on Jaguar flight test one prototype had recurring issues with low fuel pressure and collector box warnings, Eventually traced to a packet of safety matches stuck in pump intake. Centre...
Forum: Rumours & News
2nd Nov 2019, 11:28
Replies: 93
Views: 66,714
Posted By JohnFTEng

I saw a wonderful example of this at Luxor last...

I saw a wonderful example of this at Luxor last year. Cleaner was carrying five loose toilet rolls thro to toilets and armed guard made him put them thro the scanner. It was confusing and sort of...
Forum: Rotorheads
14th Mar 2018, 16:41
Replies: 464
Views: 182,214
Posted By JohnFTEng

Sorry if similar has been posted already but try...

Sorry if similar has been posted already but try searching for bbc astronaut trading water escape to see what it's like in clear swimming pool with multiple instructors and safety guys. Now do it...
Forum: Military Aviation
15th Mar 2017, 21:48
Replies: 66
Views: 24,710
Posted By JohnFTEng

About a lifetime ago -73 or 74 - did the loads...

About a lifetime ago -73 or 74 - did the loads work on Jaguar arrestor hook trials at Boscombe with the RHAG there IIRC the max design deccel was 1g at 200kts The hook was about 25 x 25mm solid...
Forum: Rumours & News
26th Jan 2016, 08:44
Replies: 49
Views: 25,939
Posted By JohnFTEng

I agree with Stone69 - inversion was a much...

I agree with Stone69 - inversion was a much better option.
Thread drift warning!
As a very junior Flight Test Engineer some 40 years ago I needed a -1g/M1.0/1,000ft test point The senior FTE...
Forum: Biz Jets, Ag Flying, GA etc.
16th Dec 2015, 07:28
Replies: 17
Views: 6,060
Posted By JohnFTEng

Why put engines on wing

Also:
* No carry through structure so simple fuselage that is lighter and has more usable space
* Wing bending moment relief
Forum: Rumours & News
15th Jul 2015, 08:00
Replies: 165
Views: 70,374
Posted By JohnFTEng

Fan Cowl Interlocks

On most consumer appliances there is an interlock that prevents operation when casing is open. On a highly automated machine like an Airbus why is there nothing similar - Fan cowl unlocked > start-up...
Forum: North America
29th Apr 2015, 07:50
Replies: 21
Views: 8,615
Posted By JohnFTEng

No paper maps on board?

Good job they were still on the ground. Reminds me of a time some years when a Jaguar prototype from Warton went to an airshow on east coast. The very new nav system crashed on return leg and pilot...
Forum: Flight Testing
29th Jan 2015, 08:01
Replies: 21
Views: 17,198
Posted By JohnFTEng

The French may have spin tested their versions at...

The French may have spin tested their versions at Istres but UK also did spin testing. I wasn't part of that team but did see the extensive work done in prep for the tests. Jag was fitted with usual...
Forum: Military Aviation
3rd Oct 2014, 16:00
Replies: 33
Views: 9,820
Posted By JohnFTEng

I recall the last(?) Canberra off to Argentina. A...

I recall the last(?) Canberra off to Argentina. A touch overweight perhaps. Good job the lights at Freckelton were green. loL
Forum: Spectators Balcony (Spotters Corner)
3rd Oct 2014, 15:24
Replies: 12
Views: 5,336
Posted By JohnFTEng

Probably because they've only just got EASA...

Probably because they've only just got EASA certification. See this article dated 30th Sept.

EASA Certifies Airbus A350-900 | Commercial Aviation content from Aviation Week...
Forum: Rumours & News
22nd Sep 2014, 11:22
Replies: 274
Views: 154,133
Posted By JohnFTEng

Red Arrows hit yacht mast - Brighton(??) about...

Red Arrows hit yacht mast - Brighton(??) about 1979/80 - lost outer 2ft of wing and crucially aileron - led to a/c loss.
Forum: Tech Log
24th Jul 2014, 07:41
Replies: 2,133
Views: 1,673,657
Posted By JohnFTEng

This sounds similar to a parametric design...

This sounds similar to a parametric design process used at BAC Warton in '70s. Used data of size, weight, power, etc to predict features of future aircraft. No idea how far it went as I was flight...
Forum: Tech Log
26th Feb 2014, 17:22
Replies: 18
Views: 4,710
Posted By JohnFTEng

Many years ago as an aero eng student I visited...

Many years ago as an aero eng student I visited the Concorde thermal test lab at Farnborough during which we were told that humans radiate about 110-120 watts/hour. Hence the need for cooling.
Forum: Tech Log
9th Aug 2013, 16:53
Replies: 13
Views: 5,506
Posted By JohnFTEng

HUDs use raster displays

I think not. I believe they use symbol generators because they are vector displays and not raster. However, I'm an aero engineer not an avionics man so i could be wrong.
Forum: Tech Log
29th Apr 2013, 08:53
Replies: 12
Views: 3,672
Posted By JohnFTEng

How about lack of commonality & associated cost...

How about lack of commonality & associated cost of spares. Very significant to the civil marketplace - less so to the military. There have been other multi-engined a/c with "handed" props - one that...
Forum: Military Aviation
15th Mar 2013, 13:10
Replies: 3
Views: 1,494
Posted By JohnFTEng

Smile I have a very nice large framed publicity photo...

I have a very nice large framed publicity photo of the Harrier in the hover with station in background courtesy of the father in law when we both worked at HSA/BAe. Also similar one of Sea Harriers...
Forum: Military Aviation
26th Sep 2011, 07:49
Replies: 90
Views: 17,663
Posted By JohnFTEng

C-17 - a successful programme? I seem to recall...

C-17 - a successful programme? I seem to recall huge cost overruns - several BILLION dollars - and long progamme delays due to wing failures and control system problems. It's easy to buy "off the...
Forum: Tech Log
19th Aug 2011, 07:43
Replies: 12
Views: 5,252
Posted By JohnFTEng

Torsional Loads

Beech18Bob
I recall, late 60's, seeing Airspeed Ambassadors doing engine runs on their twin Centaurus radials. The torsional oscillations of the triple finned rear fuse was quite alarming - at...
Forum: Flight Testing
6th Jun 2011, 09:28
Replies: 3
Views: 4,044
Posted By JohnFTEng

Try googling rockwell b-1 g-limits and wonder of...

Try googling rockwell b-1 g-limits and wonder of wonders the answer is there.
Simples!
Forum: Rumours & News
17th Nov 2010, 19:33
Replies: 1,964
Views: 1,335,480
Posted By JohnFTEng

IP Turbine Disk

What intrigues me is the fact that the IP turbine disk contained no blades at all. Any ideas on how the blades released themselves from the disk? There were no broken roots left - just clean fir...
Forum: Tech Log
19th Feb 2009, 12:24
Replies: 33
Views: 16,267
Posted By JohnFTEng

For the uninitiated or those simply wanting to...

For the uninitiated or those simply wanting to recall the sounds you can find some examples at AEHS Home (http://www.enginehistory.org) and look for the "sounds" tab on LHS. Theres lot of details...
Forum: Flight Testing
11th Feb 2009, 12:43
Replies: 9
Views: 2,664
Posted By JohnFTEng

On the subject of hard landings

This was another exaple of a hard landing at a Farnborough airshow a few years back.

YouTube - deHavilland DHC-5 Buffalo Crash (http://www.youtube.com/watch?v=ZmYpP-6r7Lo)

Luckily no one hurt...
Forum: Flight Testing
5th Feb 2009, 08:31
Replies: 13
Views: 3,572
Posted By JohnFTEng

Have you tried your local library. While they...

Have you tried your local library. While they won't have it in they will be able to get it via inter library loan. The British Library has a "depositry" some up in South Yorkshire somewhere that...
Forum: Military Aviation
11th Nov 2008, 14:36
Replies: 268
Views: 51,370
Posted By JohnFTEng

I agree with your comments about these three last...

I agree with your comments about these three last heroes of WW1 at Cenotaph this AM - most moving.

Recently re-read, for umpteenth time, CS Lewis book Sagittarius Rising. he describes in...
Forum: Aviation History and Nostalgia
23rd Oct 2008, 15:25
Replies: 47
Views: 11,835
Posted By JohnFTEng

Hi, While I was at Uni I did a 6 month spell on...

Hi,
While I was at Uni I did a 6 month spell on shop-floor at Brough in '68 or '69 and saw the low-level photos on the notice board. They were doing some low level flow visualisation work with...
Forum: Tech Log
8th Oct 2008, 08:00
Replies: 19
Views: 4,174
Posted By JohnFTEng

ghlcarl, I'm sorry but I simply reported that...

ghlcarl,
I'm sorry but I simply reported that "the authorities" felt it necessary to dig the stuff up rather than leave it at the crash site. Not hysteria or any other thing. I personally do not...
Forum: Tech Log
6th Oct 2008, 14:43
Replies: 19
Views: 4,174
Posted By JohnFTEng

Depeleted Uranium (DU)

IIRC this caused a "problem" when the KAL 747F crashed at Stanstead about 10 years ago. The recovery took a while as they had to dig some tonnes of earth to recover the lost DU ballast weights.
Forum: Tech Log
22nd Jul 2008, 09:15
Replies: 11
Views: 1,186
Posted By JohnFTEng

This really is Aero101! There are four basic...

This really is Aero101! There are four basic forces acting on your a/c - thrust and drag in fore/aft plane, and, lift and weight in vertical plane. The lift opposes the weight - so your 60 tonnes...
Forum: Tech Log
21st Jul 2008, 09:34
Replies: 11
Views: 4,898
Posted By JohnFTEng

A good example of this "solidity" is the...

A good example of this "solidity" is the Hercules. early models with Allisons had 4-blade props with high solidity ratio. The newer c130k have 6-blade props with low solidity. Judging by the...
Forum: Tech Log
22nd Jun 2008, 17:49
Replies: 16
Views: 2,038
Posted By JohnFTEng

No roaring afterburners there. IIRC Conceorde...

No roaring afterburners there. IIRC Conceorde could supercruise on dry-thrust.
Forum: Tech Log
22nd Apr 2008, 09:39
Replies: 21
Views: 3,332
Posted By JohnFTEng

Genghis, Why I did Aeronautical eng at City in...

Genghis,
Why I did Aeronautical eng at City in 67-70 we did principles of rocket flight, basic orbital mechanics, transfer orbits, etc. We did concentrate on structures, aerodynamics, S&C bu the...
Forum: Military Aviation
25th Mar 2008, 08:43
Replies: 55
Views: 12,088
Posted By JohnFTEng

Jaguar Motorway "operations"

In '73/'74 a Jaguar operated by BAe as part of the flight test programme at Warton did make one test landing/takeoff from an un-opened stretch of motorway from Preston to Blackpool (M56?). It was to...
Showing results 1 to 35 of 41
 
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