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Search: Posts Made By: jh5speed
Showing results 1 to 35 of 42
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Forum: Aviation History and Nostalgia
19th May 2021, 17:54
Replies: 41
Views: 10,979
Posted By jh5speed

The BMA 360 shuttle was known as the Shoebox at...

The BMA 360 shuttle was known as the Shoebox at East Midlands (in the cleaning team at least - I did two summers' worth).
Adding an s to a company's name seems to be a common aerospace thing:...
Forum: Tech Log
26th Jun 2019, 22:52
Replies: 15
Views: 9,978
Posted By jh5speed

I was talking about what a controller might do at...

I was talking about what a controller might do at high power in response to AI being selected. No pilot action was involved - sorry if I gave that impression.

OK - so we are taking about an...
Forum: Tech Log
26th Jun 2019, 14:52
Replies: 15
Views: 9,978
Posted By jh5speed

For a given pilot demand (throttle lever...

For a given pilot demand (throttle lever position) engines are controlled to ('rated to', or 'rated on') a looked-up value of a particular measured engine parameter. That looked-up value is the...
Forum: Tech Log
26th Jun 2019, 11:55
Replies: 15
Views: 9,978
Posted By jh5speed

I doubt if bleed extraction changes the...

I doubt if bleed extraction changes the performance of the speed control loop in any significant way. If the engine is rated on LP spool speed (I'm assuming here...), maybe there is a debit applied...
Forum: Aviation History and Nostalgia
16th Sep 2018, 19:55
Replies: 38
Views: 7,508
Posted By jh5speed

There's one as a gate guard at the Safran...

There's one as a gate guard at the Safran (Snecma) plant at Villaroche just outside Paris
Forum: ATC Issues
10th Mar 2016, 10:37
Replies: 176
Views: 57,497
Posted By jh5speed

The thought occurred to me whether this is the...

The thought occurred to me whether this is the only radar head in captivity. Are these things usually preserved in museums (we'll discount Lasham as a museum of course...).

I guess you guys are...
Forum: ATC Issues
4th Mar 2016, 17:19
Replies: 176
Views: 57,497
Posted By jh5speed

OK, let's see whether anything appears now ... ...

OK, let's see whether anything appears now ...


http://www.pprune.org/members/132046-jh5speed-albums-jh5speed-picture224-dsc00027.jpg

At East Midlands Aeropark ...
Forum: ATC Issues
2nd Mar 2016, 19:50
Replies: 176
Views: 57,497
Posted By jh5speed

For what it's worth - here's the one at East Mids...

For what it's worth - here's the one at East Mids Aeropark

https://picasaweb.google.com/111857309911638530878/Aero
Forum: Spectators Balcony (Spotters Corner)
19th Aug 2015, 17:08
Replies: 0
Views: 1,756
Posted By jh5speed

EMA last Sunday pm - what did I miss?

Late afternoon (16th Aug) - I drove past the Aeropark and there were loads of folk waiting for something. Didn't have time to stop ...

What did I miss?
Forum: ATC Issues
24th Feb 2013, 18:32
Replies: 267
Views: 76,781
Posted By jh5speed

Thanks HD - thinking about this, I must have...

Thanks HD - thinking about this, I must have wrongly linked a passing comment about the not-so-ideal placing of the Heathrow radar, and a CCTV (again early 80's) at East Midlands tower to cover a...
Forum: ATC Issues
23rd Feb 2013, 11:43
Replies: 267
Views: 76,781
Posted By jh5speed

I also had the pleasure of visiting in 1984 as...

I also had the pleasure of visiting in 1984 as part of my prep for the ATCO board interview (I didn't succeed - became an engineer instead). As I recall it was a 'give us a call when you are outside...
Forum: Tech Log
14th Mar 2012, 08:05
Replies: 25
Views: 136,219
Posted By jh5speed

Slasher - it may suck volume - but only that...

Slasher - it may suck volume - but only that which is enough to do the job. If you have dense fuel you do not need so much volume flow rate, so you can throttle back ...
Forum: Tech Log
22nd Feb 2012, 11:50
Replies: 155
Views: 42,084
Posted By jh5speed

Without a doubt, though probably the extra cost...

Without a doubt, though probably the extra cost of control-system improvements would outweigh the efficiency gain (however calculated - I guess it would need a labour cost element as well as fuel...
Forum: Tech Log
22nd Feb 2012, 07:14
Replies: 155
Views: 42,084
Posted By jh5speed

Lomapaseo – quite right, we do (and should) pick...

Lomapaseo – quite right, we do (and should) pick up stuff around the edge of the discussion, however I was addressing what I considered to be the main question. And yes – it is fun.

Lyman, you...
Forum: ATC Issues
21st Feb 2012, 19:53
Replies: 176
Views: 57,497
Posted By jh5speed

Filton had a 424 or similar - I think its gone...

Filton had a 424 or similar - I think its gone now. The big (264?) on the hill went in the last couple of years too. A shame - quite a landmark.

The East Midlands 424 is indeed in the Aeropark -...
Forum: Tech Log
21st Feb 2012, 07:03
Replies: 155
Views: 42,084
Posted By jh5speed

Starting is an entirely separate issue. Claarly,...

Starting is an entirely separate issue. Claarly, the stable flow/burning process needs to be initiated by persuading everything to flow in the right dierction. However what this thread is all about...
Forum: Tech Log
20th Feb 2012, 18:12
Replies: 155
Views: 42,084
Posted By jh5speed

I read all the above and reckon there’s room for...

I read all the above and reckon there’s room for another angle on this so I’m going to resurrect this thread and wade in here – this is one of those questions which keeps me awake at night –...
Forum: Aviation History and Nostalgia
6th Mar 2010, 21:25
Replies: 25
Views: 19,321
Posted By jh5speed

There is a picture of the building of EMA in BG...

There is a picture of the building of EMA in BG Cramp's British Midland Airways book ...

Slightly larger this time ...

Also just remembered that EMA retained a grass NE/SW (ish) runway until...
Forum: Tech Log
2nd Jun 2009, 20:56
Replies: 35
Views: 8,372
Posted By jh5speed

... and for what its worth, the A400M with its...

... and for what its worth, the A400M with its TP400 engines has opposing sense for inboard and outboard engines

i.e. from rear: cw/acw/cw/acw
Forum: Tech Log
2nd Jun 2009, 20:03
Replies: 4
Views: 1,348
Posted By jh5speed

Just resurrecting this thread... Someone...

Just resurrecting this thread...

Someone I was talking to the other day suggested that the tailplane was modified on all 810 series (not just BMAT) due to the change in trim arising from the...
Forum: Aviation History and Nostalgia
25th Jul 2008, 20:27
Replies: 150
Views: 25,932
Posted By jh5speed

I'm just starting now, where my father started...

I'm just starting now, where my father started with me 35 years ago! My son is 7 and we have - just today - gone to get a kit 'for the holidays'. He (we) chose a P38 Lightning - I mentioned to him...
Forum: Tech Log
19th Apr 2008, 17:47
Replies: 9
Views: 1,872
Posted By jh5speed

As the circle tightens (radius decreasing), more...

As the circle tightens (radius decreasing), more centripetal force is required to maintain the circle (assume same speed (v) and mass (m) : F = mv**2/r). The centripetal force is provided by lift...
Forum: Tech Log
19th Apr 2008, 10:32
Replies: 4
Views: 8,392
Posted By jh5speed

Turboprops Some turboprops have independent...

Turboprops
Some turboprops have independent speed control (via a separate lever : the condition lever is sometimes used as an rpm demand input e.g. PT6?); some have have speed demand as a function...
Forum: Tech Log
18th Apr 2008, 19:03
Replies: 9
Views: 1,872
Posted By jh5speed

Exactly the same way as it does the right way up...

Exactly the same way as it does the right way up - only less well - unless the aircraft was vertically symmetrical that is, and then it'd be just as good (but then nobody would know it was upside...
Forum: Aviation History and Nostalgia
9th Apr 2008, 22:13
Replies: 19
Views: 4,887
Posted By jh5speed

331 I remember one particular baggage...

331

I remember one particular baggage handler at EMA who used to amuse himself by leaning with gloved hands against a running-down Viscount prop spinner, while the rest of the baggage gang were...
Forum: Aviation History and Nostalgia
28th Feb 2008, 20:43
Replies: 19
Views: 4,887
Posted By jh5speed

Some interesting memories above ... The...

Some interesting memories above ...

The dentist flying AXIX was the same chap that flew (flies?) the BMA SF260 BAGB - used to be regularly seen doing aerobatics to the north.

Grass runway :...
Forum: Aviation History and Nostalgia
22nd Feb 2008, 18:13
Replies: 19
Views: 4,887
Posted By jh5speed

East Midlands in the 70's

... a consequence of another thread elsewhere - not sure whether it belongs here or in Spotters' Corner.

I spent many happy hours back in the 70's (Sunday afternoons mostly) with a pair of...
Forum: Tech Log
12th Feb 2008, 19:56
Replies: 54
Views: 7,899
Posted By jh5speed

Thanks for all the interest in this folks. ...

Thanks for all the interest in this folks.

Quote : Amber 1 "If you did it properly and at the right speed, the props would spool all the way up with no "dip". Most people got the hang of it but...
Forum: Tech Log
9th Feb 2008, 09:16
Replies: 4
Views: 2,471
Posted By jh5speed

They are still called decks - I issued one only...

They are still called decks - I issued one only the other day!
Forum: Tech Log
9th Feb 2008, 09:14
Replies: 54
Views: 7,899
Posted By jh5speed

Basil : quote : 'some misguided souls considered...

Basil : quote : 'some misguided souls considered placing them to FF an amusing way to commence taxi. RPM would drop and TGT rise. Not a great idea.'

Is this the answer to my original question...
Forum: Tech Log
8th Feb 2008, 15:36
Replies: 54
Views: 7,899
Posted By jh5speed

Chris - Thanks - you just got in before me: ...

Chris - Thanks - you just got in before me:

Just to note the Dart is a single spool animal - prop is connected to the one (and only) shaft. 2 stage of compressor (centrifugal) and 2 turbine...
Forum: Tech Log
8th Feb 2008, 15:21
Replies: 54
Views: 7,899
Posted By jh5speed

Paradism - I assure you that this is not about...

Paradism - I assure you that this is not about the Doppler effect. What I (i.e. the lad at perimeter fence all those years ago) am talking about is the spool-up behaviour at the end of the runway...
Forum: Tech Log
7th Feb 2008, 16:02
Replies: 4
Views: 1,348
Posted By jh5speed

link to photo now sorted ...

link to photo now sorted ...
Forum: Tech Log
6th Feb 2008, 21:35
Replies: 4
Views: 1,348
Posted By jh5speed

Asymmetric Viscount Tailplane

If I've done this right - you should see a view of Viscount G-BMAT (taken 1985 or 86).

http://i258.photobucket.com/albums/hh254/jh5speed/G-BMAT.jpg


Why asymmetric t/p please? Propwash...
Forum: Tech Log
6th Feb 2008, 20:07
Replies: 54
Views: 7,899
Posted By jh5speed

Javelin - I think you're right - and what's more...

Javelin - I think you're right - and what's more I reckon it's doing a little dip too !
Showing results 1 to 35 of 42
 
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