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Search: Posts Made By: PETTIFOGGER
Showing results 1 to 35 of 52
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Forum: Tech Log
8th Jul 2010, 16:34
Replies: 120
Views: 33,217
Posted By PETTIFOGGER

Wizofoz Fair enough. Concerning there is much...

Wizofoz
Fair enough. Concerning there is much to choose from, e.g. http://www.imsc.res.in/~iagrg/IagrgSite/Activities/IagrgMeetings/25th_Iagrg/VRtalk.pdf...
Forum: Tech Log
8th Jul 2010, 11:45
Replies: 120
Views: 33,217
Posted By PETTIFOGGER

PBL Yes, I noticed, and also noticed that the...

PBL Yes, I noticed, and also noticed that the philosophy of physics appears to have been banned by Wizofoz. I am aware of some of the literature on determinism/causation.
Forum: Tech Log
8th Jul 2010, 09:45
Replies: 120
Views: 24,202
Posted By PETTIFOGGER

Isn’t this just a trick question? Groundspeed is...

Isn’t this just a trick question? Groundspeed is simply distance/time at that level when other speed influencing factors are accounted for, one of those being the slight increase in distance...
Forum: Tech Log
8th Jul 2010, 09:14
Replies: 120
Views: 33,217
Posted By PETTIFOGGER

Capt PB Er. Interesting but not very...

Capt PB Er. Interesting but not very convincing, since the atmosphere of Mars is 1 % of that of earth and is mostly carbon dioxide.
Wizofoz Not quite. Gravity or the gravitational...
Forum: Passengers & SLF (Self Loading Freight)
6th Mar 2010, 22:19
Replies: 219
Views: 30,658
Posted By PETTIFOGGER

How disappointing to read this thread. I don’t...

How disappointing to read this thread. I don’t have to use BA any more, so I don’t. I travel to the Far East up to 4 times a year in business class, and SQ, MH, CX, BR, BI, QF, TG, EK could all teach...
Forum: Rumours & News
11th Feb 2010, 16:46
Replies: 3,239
Views: 1,139,694
Posted By PETTIFOGGER

SFLY I do not speak for the crew but ~ ...

SFLY
I do not speak for the crew but ~
What you have written above is an interpretation of the AAIB report which is almost accurate, but not quite. I prefer to keep to the exact text of the...
Forum: Rumours & News
11th Feb 2010, 12:18
Replies: 3,239
Views: 1,139,694
Posted By PETTIFOGGER

SFLYThe "some sort of distraction" to which you...

SFLYThe "some sort of distraction" to which you refer was quite obviously the double roll-back. See pages 139 to 141 of the AAIB report. Which parts of the report do you find confusing?
Something...
Forum: Rumours & News
10th Feb 2010, 20:17
Replies: 3,239
Views: 1,139,694
Posted By PETTIFOGGER

My apologies for suggesting that you might have...

My apologies for suggesting that you might have sworn.. It would have been an entirely reasonable thing to do, in my view. No slur was intended. And apologies to your wife too. Oh, and well done!...
Forum: Rumours & News
9th Feb 2010, 22:56
Replies: 3,239
Views: 1,139,694
Posted By PETTIFOGGER

No doubt. But when sliding along on the grass?...

No doubt. But when sliding along on the grass? Have a look at this at 2.08 to 2.16
BBC News - BA crash captain: 'I thought it was my time to die' (http://news.bbc.co.uk/1/hi/uk/8505239.stm)
This...
Forum: Rumours & News
9th Feb 2010, 18:07
Replies: 3,239
Views: 1,139,694
Posted By PETTIFOGGER

I'm not and I don't. I believe the AAIB's report...

I'm not and I don't. I believe the AAIB's report to be well researched, well written and comprehensive in scope. I believe that they have reached the right conclusions and have provided sufficient...
Forum: Passengers & SLF (Self Loading Freight)
8th Aug 2009, 02:03
Replies: 74
Views: 9,856
Posted By PETTIFOGGER

Hi Porfot, Join the fly ba last club. Just bin...

Hi Porfot,
Join the fly ba last club. Just bin the airmiles and forget about it.
Forum: Passengers & SLF (Self Loading Freight)
6th Aug 2009, 21:25
Replies: 39
Views: 7,078
Posted By PETTIFOGGER

turbulence

As a passenger, I believe that it is ineffective to keep the seat belt sign on all the time, unless it is rough. When the sign is used judiciously, people take more notice. Experienced passengers...
Forum: Spectators Balcony (Spotters Corner)
5th Aug 2009, 13:16
Replies: 28
Views: 3,693
Posted By PETTIFOGGER

Groundloop, Hi, and thanks for straightening that...

Groundloop, Hi, and thanks for straightening that out for me. I remember now. Here is the link http://www.boeing.com/commercial/news/feature/dreamliner.html ...
Forum: Spectators Balcony (Spotters Corner)
5th Aug 2009, 10:14
Replies: 28
Views: 3,693
Posted By PETTIFOGGER

787

Hi Boe 777. Re your comment “…glitches notwithstanding I am sure they would have considered all pros and cons before assembling the aircraft……” it does not look like it to me, and I doubt that it...
Forum: Spectators Balcony (Spotters Corner)
4th Aug 2009, 23:07
Replies: 28
Views: 3,693
Posted By PETTIFOGGER

Parabellum.... Well you were done! Six years...

Parabellum.... Well you were done! Six years later, the streamlined 'Escort' cost about GBP 650 for export; and it didn't leak too much.
rgds pf
Forum: Spectators Balcony (Spotters Corner)
4th Aug 2009, 18:26
Replies: 28
Views: 3,693
Posted By PETTIFOGGER

787 problems

Seeing the Varsity and the Anglia does remind one about the questionable aesthetic design capability of some. And I don’t think anyone can seriously claim these designs were necessary to allow...
Forum: Rumours & News
1st Aug 2009, 23:00
Replies: 3,239
Views: 1,139,694
Posted By PETTIFOGGER

Mr Optimistic, Hi. I am not sure what...

Mr Optimistic, Hi.
I am not sure what uncertainty you are referring to and why that would be unsettling, particularly after Swedish Steve's post just above. Can you say more?
rgds, pf
Forum: Spectators Balcony (Spotters Corner)
1st Aug 2009, 22:38
Replies: 78
Views: 26,572
Posted By PETTIFOGGER

A380 landing

I don't know about the landing from a handling point of view, but it looked OK to me. I don't understand what all the fuss is about. I was expecting something thrilling, sphincter-tightening and...
Forum: Tech Log
28th Jun 2009, 23:23
Replies: 20
Views: 5,457
Posted By PETTIFOGGER

lateral shakes

I thought that it was well known that any aircraft with the thrust distributed across the wings hundreds of feet apart, can be prone to minor lateral accelerations, or “the shakes”, most keenly felt...
Forum: Rumours & News
1st Apr 2009, 00:05
Replies: 952
Views: 526,283
Posted By PETTIFOGGER

Has anyone built and tested one of these yet?...

Has anyone built and tested one of these yet? http://www.patentstorm.us/patents/6133857/description.html (http://http//www.patentstorm.us/patents/6133857/description.html) Not that I have seen, but...
Forum: Tech Log
17th Feb 2009, 03:08
Replies: 82
Views: 39,520
Posted By PETTIFOGGER

I think that this is a good quick reference...

I think that this is a good quick reference guide:
The Aviation History OnLine Museum Theory of Flight Index (http://www.aviation-history.com/theory/index-theory.html)
Forum: Tech Log
16th Feb 2009, 12:59
Replies: 82
Views: 39,520
Posted By PETTIFOGGER

I am no Mr Bernoulli, but the "equal transit...

I am no Mr Bernoulli, but the "equal transit time" principle has been shown to be incorrect in most cases. See the third link in deHavillandDave's post of 30 December.
rgds pf
Forum: Rumours & News
2nd Feb 2009, 09:00
Replies: 3,239
Views: 1,139,694
Posted By PETTIFOGGER

- as the AAIB noted some time ago in Safety Rec...

- as the AAIB noted some time ago in Safety Rec 2008-49, page 20 of their interim report on G-YMMM.
Forum: Tech Log
30th Jan 2009, 23:52
Replies: 34
Views: 6,803
Posted By PETTIFOGGER

I will have a light-hearted go at this. No idea...

I will have a light-hearted go at this. No idea what caused the 'ring', but I would guess that the apparent side lobes around no.4 engine are vortices generated above the wing by the use of the...
Forum: Tech Log
25th Jan 2009, 00:07
Replies: 1
VSE
Views: 858
Posted By PETTIFOGGER

Not without knowing the context. It could be a 3...

Not without knowing the context. It could be a 3 letter airport code, or convey a host of other meanings.
rgds
pf
Forum: Tech Log
20th Jan 2009, 23:54
Replies: 82
Views: 39,520
Posted By PETTIFOGGER

Fakepilot, 1.Please see my short post above....

Fakepilot,
1.Please see my short post above. The lift is caused by the forward motion of the wing through the air (the differential velocity). The forward motion is caused by the thrust of the...
Forum: Rumours & News
20th Jan 2009, 23:26
Replies: 3,239
Views: 1,139,694
Posted By PETTIFOGGER

Phil gollin, See my post 1689 of 2 September....

Phil gollin,
See my post 1689 of 2 September. What follows is speculation, but consider this. Boeing, RR and the AAIB realized that there was not enough water to produce a sufficient quantity of...
Forum: Tech Log
20th Jan 2009, 22:13
Replies: 82
Views: 39,520
Posted By PETTIFOGGER

I propose a simple explanation. Lift is caused by...

I propose a simple explanation. Lift is caused by differential velocity between a flat plate solid and a Newtonian fluid. The amount of lift (and drag) is caused by the pressure ratio which may be...
Forum: Rumours & News
19th Jan 2009, 22:39
Replies: 3,239
Views: 1,139,694
Posted By PETTIFOGGER

airfoilmod, See my post #1689 of 2 September. ...

airfoilmod,
See my post #1689 of 2 September.
rgds
Forum: South Asia and the Far East
7th Dec 2008, 22:49
Replies: 493
Views: 169,892
Posted By PETTIFOGGER

Nkosi, I believe so. I think they regained full...

Nkosi,
I believe so. I think they regained full approval in September. C check was completed on RBJ at Berakas last month.
rgds
Forum: Tech Log
30th Nov 2008, 18:52
Replies: 21
Views: 5,713
Posted By PETTIFOGGER

Hi Adam, At a quick glance, the mathematics do...

Hi Adam,
At a quick glance, the mathematics do not appear to support your suspicion. You may wish to check:
Turbofan Thrust (http://www.grc.nasa.gov/WWW/K-12/airplane/turbfan.html)
Turboprop...
Forum: Tech Log
30th Nov 2008, 03:55
Replies: 21
Views: 5,713
Posted By PETTIFOGGER

barit1, Yes, exactly, thank you. My apologies...

barit1,
Yes, exactly, thank you. My apologies for being slapdash.
rgds
Forum: Tech Log
30th Nov 2008, 01:13
Replies: 21
Views: 5,713
Posted By PETTIFOGGER

It is the gas generator that produces all the...

It is the gas generator that produces all the energy by continuous thermal reaction. Most of the thrust is produced by converting this energy to rotational force to drive the fan; some thrust is...
Forum: Tech Log
28th Nov 2008, 23:22
Replies: 21
Views: 5,713
Posted By PETTIFOGGER

Answers seriatim: It is the relative speed of the...

Answers seriatim: It is the relative speed of the air that is important for thrust. Higher bypass ratios are getting bigger because they use or ‘recover’ more energy produced by the gas generator, or...
Forum: Rumours & News
26th Nov 2008, 11:23
Replies: 59
Views: 23,713
Posted By PETTIFOGGER

Strongresolve, As I recall, DC 10s were grounded...

Strongresolve, As I recall, DC 10s were grounded for a while following the 1979 engine separation at O'Hare. But these are wider issues. Perhaps a new thread would be appropriate to share your more...
Showing results 1 to 35 of 52
 
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