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Search: Posts Made By: peter kent
Showing results 1 to 35 of 82
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Forum: Tech Log
25th Nov 2023, 18:22
Replies: 14
Views: 3,448
Posted By peter kent

I can confirm Clive's assessment: The HP...

I can confirm Clive's assessment:

The HP turbine cooling air came from the 5th stage of the 7 stage HP compressor. Incidently 5th stage air required for cooling and sealing the compressor bearings...
Forum: Military Aviation
22nd Sep 2014, 21:34
Replies: 11
Views: 3,806
Posted By peter kent

Thank you for your replies. ASWDU was at St...

Thank you for your replies. ASWDU was at St Mawgan for this time period.

I've just noticed that Chris Ashworth's "The Shackleton" has a couple of answers.
Trial 303 was ASV Mk.13 performance and...
Forum: Military Aviation
21st Sep 2014, 21:04
Replies: 11
Views: 3,806
Posted By peter kent

ASWDU trials 1951-4/8

Does anyone know what any of these trials were about (Dad's nav log book)?
1951-54
Anson: Trial 305
Lancaster: 294, 302, 304, 308
Sycamore: 312
Sunderland: 300
Neptune: 317, 351
Shackleton 1:...
Forum: Tech Log
27th Jun 2014, 22:19
Replies: 2,133
Views: 1,678,169
Posted By peter kent

Ted Talbot's book

Reading for a second time to see what I missed the first time.

On p86 he says 'It followed the idea of multi-vane auxiliary air inlets into history."

Anyone know the story on these inlets?
...
Forum: Tech Log
28th May 2014, 01:09
Replies: 198
Views: 64,545
Posted By peter kent

Since starting this topic, which generated a lot...

Since starting this topic, which generated a lot of discussion on the relevance of ramjet terms in describing the engine, I've done a lot of digging so why keep it to myself when a few of you showed...
Forum: Tech Log
25th May 2014, 21:46
Replies: 198
Views: 64,545
Posted By peter kent

Hello Brian, I have gone through old posts...

Hello Brian,

I have gone through old posts to see what I missed.......



The engine didn't need any ram to run in its cruise operating mode, just the right inlet temperature and pressure....
Forum: Tech Log
25th May 2014, 19:07
Replies: 198
Views: 64,545
Posted By peter kent

tdracer Thank you for your comments. ...

tdracer

Thank you for your comments.



Russian turboramjet experiments of the same era using a MIG-21 engine kept the engine windmilling after transition to a ramjet. They identified the...
Forum: Tech Log
22nd May 2014, 19:56
Replies: 198
Views: 64,545
Posted By peter kent

Since raising this question (ie what did David...

Since raising this question (ie what did David Campbell mean...) over a year ago (post #1) I can now tie up my loose ends. I have concluded his statements are most insightful. I hope I've interpreted...
Forum: Tech Log
22nd May 2014, 17:52
Replies: 7
Views: 2,885
Posted By peter kent

If you search "Wave Drag Characteristics of an...

If you search "Wave Drag Characteristics of an Over-the-Wing Nacelle Business Jet Configuration" you get the complete Hondajet engine position story.
Forum: Tech Log
7th Jan 2014, 20:20
Replies: 2,133
Views: 1,678,169
Posted By peter kent

Jet noise

Were the primary nozzle spade silencers mentioned in this Flight article used on production aircraft?

Also, again in this article, was it a production feature to open the primary nozzle to reduce...
Forum: Tech Log
27th Nov 2013, 19:34
Replies: 16
Views: 11,385
Posted By peter kent

Note there are only 2 questionable values in this...

Note there are only 2 questionable values in this table so it must be good:ok:
Forum: Tech Log
17th Oct 2013, 00:57
Replies: 2,133
Views: 1,678,169
Posted By peter kent

New Concorde book

Just out ..

CONCORDE - A Designer's Life by Ted Talbot

I've just found an earlier pprune post educating me on the author

QUOTE]If I may, I would now like to mention the 'some oil lamps...
Forum: Tech Log
10th Oct 2013, 00:12
Replies: 2,133
Views: 1,678,169
Posted By peter kent

SNECMA reheat

I've always seen it mentioned as SNECMA reheat until the other day..

The ORIGINAL design for the reheat was done by SNECMA, but due to them getting into all sorts of trouble with the fuel...
Forum: Tech Log
7th Oct 2013, 19:34
Replies: 198
Views: 64,545
Posted By peter kent

A couple of dimensions to add to the data bank,...

A couple of dimensions to add to the data bank, Clive/ Brian.

I was at Duxford a while ago and there are 2 J-58s under the Blackbird.
Someone thoughtfully displayed them with one nozzle fully...
Forum: Military Aviation
23rd Sep 2013, 20:46
Replies: 18
Views: 3,548
Posted By peter kent

Thanks All for your answers.

Thanks All for your answers.
Forum: Military Aviation
22nd Sep 2013, 01:47
Replies: 18
Views: 3,548
Posted By peter kent

U-2 vulnerability question

Does anyone have any thoughts on how a U-2 would have fared against the US inventory of air defence measures in the same period it roamed with impunity over the USSR (1956-April 1960)?

eg would...
Forum: Tech Log
8th Sep 2013, 01:45
Replies: 14
Views: 3,266
Posted By peter kent

YC-14 exhaust over wing

Check out this article on YC-14 and YC-15



1975 | 0193 | Flight Archive (http://www.flightglobal.com/pdfarchive/view/1975/1975%20-%200193.html)

see page 152 also for more details on...
Forum: Flight Testing
8th Sep 2013, 01:23
Replies: 42
Views: 29,757
Posted By peter kent

high tail is best....

Here's a summary of why the high tail on the C-141 (It saved 7800 lb TO weight)

Google this AIAA paper:

Effect of horizontal stabilizer vertical location on the design of large transport...
Forum: Tech Log
8th Sep 2013, 00:15
Replies: 14
Views: 3,266
Posted By peter kent

Hondajet story

Honda's justification for overwing engines


http://hondajet.honda.com/pdf/tech_papers/Journal_of_Aircraft_Vol40_No6_P1177_P1184_Wave_Drag_OTWEM.pdf
Forum: Tech Log
16th Feb 2013, 17:21
Replies: 198
Views: 64,545
Posted By peter kent

Hello Lyman, I agree with your reasoning. ...

Hello Lyman,
I agree with your reasoning.

The increase in engine thrust at the afterburner nozzle (gross) is, I believe although not quoted, of the same order as the airflow increase. I guess the...
Forum: Tech Log
15th Feb 2013, 16:31
Replies: 198
Views: 64,545
Posted By peter kent

Clive, Extra background, the F-12 with...

Clive,

Extra background, the F-12 with chines at M3 had L/D about 6.6 as you figured for the SR-71.
See Fig 6 "F-12 Series Aircraft Aerodynamic and Thermodynamic Design in Retrospect" Ben Rich.
...
Forum: Tech Log
15th Feb 2013, 13:32
Replies: 198
Views: 64,545
Posted By peter kent

Hi gums, TurbineD said it all with, for...

Hi gums,


TurbineD said it all with, for example


I have found 2 photographs which illustrate the plumbing nightmare and how tight it was to get 2 of the tubes out of the compressor case. For...
Forum: Tech Log
15th Feb 2013, 01:36
Replies: 198
Views: 64,545
Posted By peter kent

gums, Thanks for your reply.:ok:

gums,
Thanks for your reply.:ok:
Forum: Tech Log
15th Feb 2013, 01:28
Replies: 198
Views: 64,545
Posted By peter kent

Clive, I'll find where I got that. I'm sure...

Clive,
I'll find where I got that. I'm sure there is a lot of other stuff that goes with it that may help.

Here it is, Fig 12 at M2.8

Access forbidden!...
Forum: Tech Log
14th Feb 2013, 00:36
Replies: 198
Views: 64,545
Posted By peter kent

Hi gums, Your comments prompted me to...

Hi gums,



Your comments prompted me to look up a couple of things.

"During (TF-41) development testing with M61 gun and missile firing the only sign of engine malfunction was a slight pop...
Forum: Tech Log
13th Feb 2013, 23:46
Replies: 198
Views: 64,545
Posted By peter kent

Clive, My original question basically...

Clive,



My original question basically revolved around the above interpretation of mine, ie the heating up of the induced flow took place before it got to the ejector,ie heating it up with max...
Forum: Tech Log
13th Feb 2013, 19:21
Replies: 198
Views: 64,545
Posted By peter kent

Brian, He's referring to M2.2 and M3+...

Brian,



He's referring to M2.2 and M3+ from his Table 1 of 'Propulsive thrust distribution'.

It's on page 672 of the paper.

Thanks for the intake patent.
Forum: Tech Log
13th Feb 2013, 14:47
Replies: 198
Views: 64,545
Posted By peter kent

bypass

Hi gums,


My understanding comes from reading the patent and other first-hand writings by Dr A.
Having calculated what was required to do the job, ie to sort out the compressor and then use the...
Forum: Tech Log
11th Feb 2013, 20:46
Replies: 198
Views: 64,545
Posted By peter kent

Bulls-eye, Clive. Thanks

Bulls-eye, Clive.
Thanks
Forum: Tech Log
10th Feb 2013, 14:46
Replies: 198
Views: 64,545
Posted By peter kent

Clive/ Brian, This is probably too-simplistic a...

Clive/ Brian,
This is probably too-simplistic a viewpoint to have any merit for such a complex subject, but have to ask.

A lot of interest is always shown in the thrust contribution from the...
Forum: Tech Log
8th Feb 2013, 16:29
Replies: 198
Views: 64,545
Posted By peter kent

New question

Where would the intake contribution to the +47% come from? ie not the fundamentals of where intake thrust comes from, but specifically what would have caused the change.

eg would it have been from...
Forum: Tech Log
7th Feb 2013, 02:17
Replies: 198
Views: 64,545
Posted By peter kent

Clive, I've just noticed a Pj/Ps of 0.29 for...

Clive,
I've just noticed a Pj/Ps of 0.29 for the SR-71 at M3.2 (Peter Law's presentations on AEHS website). Can that tell us anything by itself on how the SR71 installation compared to Concorde?
Forum: Tech Log
7th Feb 2013, 01:36
Replies: 198
Views: 64,545
Posted By peter kent

Hello Lyman, Don't know if I can help but for...

Hello Lyman,
Don't know if I can help but for an attempt can you be a bit more explicit?

Do you mean, for example, why/how do we get an increase in thrust as a result of the bleed flow becoming...
Forum: Tech Log
6th Feb 2013, 22:38
Replies: 198
Views: 64,545
Posted By peter kent

Clive, I've gone through your flow explanation...

Clive,
I've gone through your flow explanation and appreciate it.
I'd like to add, ref

From, for example, "Fast Jets - the history of reheat development at Derby" by Cyril Elliott "... in...
Forum: Tech Log
3rd Feb 2013, 22:55
Replies: 198
Views: 64,545
Posted By peter kent

Turbine D, I'm not sure how PMs work so I'm...

Turbine D, I'm not sure how PMs work so I'm figuring it out and will reply. I thought it meant previous messages but have made one step forward from there so far.
PK
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