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Search: Posts Made By: PDR1
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Forum: Tech Log
26th Oct 2023, 07:43
Replies: 15
Views: 1,719
Posted By PDR1

If you were listening to the audience at the...

If you were listening to the audience at the Farnborough events it's worth considering that at least one of the more vocal opponents on the FCC has been given an ASBO for his sustained, truth-free...
18th Dec 2022, 21:13
Replies: 106
Views: 53,973
Posted By PDR1

I may be wrong, but IIRC the GRP front nozzles...

I may be wrong, but IIRC the GRP front nozzles were only used on the P1127/Kestral; one came off while exploring supersonic dives so they were replaced with metal nozzles from the Harrier GR1.

PDR
17th Dec 2022, 07:32
Replies: 106
Views: 53,973
Posted By PDR1

Simple observation. The aeroplane bounces and is...

Simple observation. The aeroplane bounces and is in a stable hover when suddenly it pitches violently nose-down, rotating about the rear nozzle. The engine is clearly still producing thrust and the...
16th Dec 2022, 14:26
Replies: 106
Views: 53,973
Posted By PDR1

The SHAR had an engine "dump valve" which...

The SHAR had an engine "dump valve" which diverted fuel flow to filling a sump as soon as it got weight on wheels* to ensure that when it touched the deck it stayed firmly there rather than being...
25th Nov 2022, 14:23
Replies: 74
Views: 19,580
Posted By PDR1

The press isn't needed for the manufacture or...

The press isn't needed for the manufacture or maintenance of weapons - just for treatment of nuclear waste. The solution is thus obvious. The raw nuclear waste should be placed in containers and...
24th Nov 2022, 23:16
Replies: 55
Views: 10,938
Posted By PDR1

The Sea Fury was developed from the Tempest,...

The Sea Fury was developed from the Tempest, which was originally designed to have the liquid-cooled Napier Sabre (with its Tornado stablemate that was intended to have the liquid-cooled Rolls Royce...
24th Nov 2022, 08:11
Replies: 55
Views: 10,938
Posted By PDR1

I don't think history supports that. RR were...

I don't think history supports that. RR were developing the Merlin and Griffon side-by-side and only abandoned the Peregrine because there was little point in developing the last stretch of a 21Litre...
22nd May 2022, 12:37
Replies: 81
Views: 8,974
Posted By PDR1

Look she's 18, ok? If you don't believe me I can...

Look she's 18, ok? If you don't believe me I can show you the mail-order invoice.

PDR
24th Apr 2022, 08:59
Replies: 23
Views: 2,896
Posted By PDR1

I borrowed my wife's laptop the other day and all...

I borrowed my wife's laptop the other day and all the ads were for divorce lawyers.

I guess she must have lent it to someone...

PDR
24th Mar 2022, 12:41
Replies: 64
Views: 7,385
Posted By PDR1

(deleted) ​​​​​​

(deleted)
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20th Feb 2022, 12:49
Replies: 81
Views: 24,260
Posted By PDR1

It still comes down to an automation in a primary...

It still comes down to an automation in a primary flight control which operates silently and uses only a single data source. Even Boeing know that's not the right way to design aeroplanes, which is...
30th Nov 2021, 08:42
Replies: 97
Views: 13,701
Posted By PDR1

I assumed this was a tongue-in-cheek post as it's...

I assumed this was a tongue-in-cheek post as it's a fairly well established myth. Maxim (and Ader, and many others) built things in the latter years of the 19th century which became airborne (usually...
29th Nov 2021, 09:52
Replies: 97
Views: 13,701
Posted By PDR1

Not actually true, I'm afraid. Most modern...

Not actually true, I'm afraid. Most modern automotive engines use "stratified charge" combustion to get the efficiency - a concept which generates layers of lean and rich mixture inside the...
28th Nov 2021, 17:08
Replies: 97
Views: 13,701
Posted By PDR1

I think Rolls Royce, Napier, Bristol and...

I think Rolls Royce, Napier, Bristol and DeHavilland, Hispana, BMW, Junkers and quite a few others might be coughing & spluttering a bit at that.

PDR
28th Nov 2021, 15:39
Replies: 97
Views: 13,701
Posted By PDR1

I accept that that there was good patronage on...

I accept that that there was good patronage on both sides (to quote Agent Orange).

I'm not particularly promoting batteries either, just (as I said) making the point that it is not a clear binary...
28th Nov 2021, 12:17
Replies: 97
Views: 13,701
Posted By PDR1

On a point of information - PDR1 does not need to...

On a point of information - PDR1 does not need to be patronised* on this topic, and nor does he need to do any research because PDR1 is actually involved in studies around future aircraft propulsion...
28th Nov 2021, 10:36
Replies: 97
Views: 13,701
Posted By PDR1

That's my point - hydrogen is not an energy...

That's my point - hydrogen is not an energy source, merely an energy transfer mechanism. You need energy made by some other means and then you "transform" it into hydrogen in a process that's...
28th Nov 2021, 08:32
Replies: 97
Views: 13,701
Posted By PDR1

Most battery failure modes are age and...

Most battery failure modes are age and environment related, so unless one battery is explicitly required to be half the age of the other there's a high-ish probability that both will be dead on that...
28th Nov 2021, 08:26
Replies: 97
Views: 13,701
Posted By PDR1

Great. Where are you going to get the hydrogen...

Great. Where are you going to get the hydrogen from? It may be different in your part of the world, but around here hydrogen mines are a little thin on the ground...

PDR
25th Nov 2021, 14:09
Replies: 97
Views: 13,701
Posted By PDR1

The automotive systems that control injector...

The automotive systems that control injector operation/timing, ignition timing, knock-sensing etc include software in what would be (in an aviation application) a safety critical branches of the...
3rd Oct 2021, 07:33
Replies: 37
Views: 5,600
Posted By PDR1

Lots of people contributed to the Battle of...

Lots of people contributed to the Battle of Britain in lots of different ways. One of the points made by Derek Wood in the meticulously researched "Narrow Margin" is the way British industry...
3rd Oct 2021, 07:15
Replies: 2
Views: 1,878
Posted By PDR1

CASA steps up the battle against drones

Well it's more effective than trained dogs!

https://youtu.be/eF7yVnjyLzU
3rd Sep 2021, 14:59
Replies: 20
Views: 3,112
Posted By PDR1

I think the ideal spot would be about 12 miles...

I think the ideal spot would be about 12 miles east south-east of Maidenhead.

PDR
20th Aug 2021, 18:09
Replies: 41
Views: 10,815
Posted By PDR1

That would surely suggest that the aeroplane is...

That would surely suggest that the aeroplane is flying over the top of the sun (looking at where the shadow of the wing lies on the fuselage). The Hurricane was a big step-up in performance when it...
20th Aug 2021, 11:51
Replies: 41
Views: 10,815
Posted By PDR1

Having just looked that up I discovered that the...

Having just looked that up I discovered that the fabric-covered and stressed-skin wings were fully interchangeable at 1st line, having identical mountings, winging/plumbing and weight/CG. Indeed it...
20th Aug 2021, 09:37
Replies: 41
Views: 10,815
Posted By PDR1

This is a common artefact of the way the shutter...

This is a common artefact of the way the shutter sweeps across the frame, so different parts of the photograph are actually taken at slightly different times. You often see a similar effect with...
4th Aug 2021, 23:02
Replies: 132
Views: 67,241
Posted By PDR1

It was always their intent to remain in EASA...

It was always their intent to remain in EASA *provided* that we could do so without having the ECtJ as the ultimate arbiter, because the whole Brexit Mendocracy was rooted in the idea than we...
Replies: 92
Views: 28,432
Posted By PDR1

Absolutely, although those definitions of C.Eng...

Absolutely, although those definitions of C.Eng are rather out of date - there is no proscriptive definition of the time required in further training or professional practice, merely a specification...
Replies: 92
Views: 28,432
Posted By PDR1

Negan We've been through this before - it's...

Negan

We've been through this before - it's an apples and oranges thing. Degrees (indeed all level 6 quals) must involve an element of original research. That's not really appropriate for pilot...
19th Feb 2021, 07:31
Replies: 136
Views: 36,639
Posted By PDR1

Not sure there's much "futility" in an aeroplane...

Not sure there's much "futility" in an aeroplane that was designed for manufacturability. IIRC according to "Narrow Margin" it took around a third of the man-hours to make a 109 compared to a...
6th Feb 2021, 03:37
Replies: 136
Views: 36,639
Posted By PDR1

Well the Beverley wasn't actually a Blackburn...

Well the Beverley wasn't actually a Blackburn design - it was designed by General Aircraft who were subsequently taken over by Blackburn. There are more than sufficient true Blackburn examples...
6th Feb 2021, 02:39
Replies: 136
Views: 36,639
Posted By PDR1

Well if you want "ugly" you surely have to...

Well if you want "ugly" you surely have to include the exceptional efforts put in by Blackburn to include almost everything they ever made. Whether it be the Blackburd:
...
16th Oct 2020, 20:29
Replies: 109
Views: 41,294
Posted By PDR1

Well the'd struggle to get higher without...

Well the'd struggle to get higher without tanking...

PDR
4th Oct 2020, 22:45
Replies: 36
Views: 7,764
Posted By PDR1

Yes, we have that too (even when on flying club...

Yes, we have that too (even when on flying club sites), but only for over 250g models/drones. There was a fuss when it was first set up, but to be honest it's a pretty negligible effort increase....
4th Oct 2020, 08:28
Replies: 36
Views: 7,764
Posted By PDR1

FWIW - here in the UK any use of a drone or model...

FWIW - here in the UK any use of a drone or model aeroplane by or in support of a commercial operation (ie the usual "for hire or reward" thing) requires a form of Air Operator Certificate from the...
Showing results 1 to 35 of 1000
 


 
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