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jwcook
20th May 2007, 09:53
Typhoons PIRATE IRST

"The one eyed wonder"

source :-http://www.defenseindustrydaily.com/2007/05/ncade-an-abm-amraam/index.php
http://www.defenseindustrydaily.com/images/AIR_B-2_Close_View_IR.gif

B-2 Spirit stealth bomber, lifted from EADS Eurofighter's presentation to the Norwegian government.

Interesting huh, does anyone have that presentation?, is it restricted or can anyone say the context in which this picture was used?.

Just by looking at the picture you have to admit the B-2 looks pretty clever in the IR department.

Cheers

pba_target
20th May 2007, 15:02
Very even IR profile it has to be said! Albeit from below, but then that's where most of the IR threat is from...

Looks like someone has been taking cheeky snaps whilst parked at airshows doesn't it!

cooheed
20th May 2007, 15:34
Am sure this is part of the footage of BWOS' Rapier FSC unit tracking the B-2 at Farnborough back in 1996 when the system was first introduced. Bit of a non event really. It was optically tracked.

R 21
20th May 2007, 17:23
Cooheed

your right they use it as an example at the AWC.

jwcook
20th May 2007, 22:43
Deary me.. IMHO its a bit cheeky using Rapier FCS vision in a fighter presentation, but I should wait till I read the presentation and the context

Cheers.

claude liardet
21st May 2007, 08:59
Yep, 100% Rapier footage. Since it was taken - as has previously been pointed out - while the B2 was flying at about 500 feet down the Farnborough runway about half a mile from the Fire Unit it isn't perhaps the most convincing demonstration of counter-stealth technology, and to my knowledge nobody who knows what they are talking about has ever claimed it to be such. Still, nobody talks up a piece of kit like the man trying to sell it to you!

jwcook
21st May 2007, 10:06
I've since read the paper, its seems reasonable in the context it was used, I've asked if i can post the link to it and will do if I get the OK, so you can all have a look at the public presentations to Norway for JSF Gripen and Typhoon, some interesting tidbits.

Cheers

LowObservable
21st May 2007, 13:11
The IRST issue is an interesting one. I don't think anyone has quoted an official, unclassified range for any IRST, which in any event would need to be qualified for target size and thermal signature - which is affected by speed, altitude and propulsion mode - not to mention altitude and weather. There are also IR suppressive coatings and (at least in theory) the ability to cool things. However, IRST has presumably improved with time (physics not, processing yes) and has its advantages.

TMor
21st May 2007, 15:08
Hi everyone.

As I talked to JWCook about those presentations, here is a link to my webpage where you can download 3 PDFs on the first page :
http://morisson.thomas.free.fr/

:ok:

Green Flash
21st May 2007, 20:35
Presume the F-15's that escorted the B2 at Fairford were there to mess up the IR and radar signature of the bomber, should any interested party be trying to draw a bead on the beast?

jwcook
21st May 2007, 23:46
Page 52 of the Eurofighter pdf, is its fuel fraction and wing loading better than the F-22 and the JSF?.

and page 46 shows a graphic with the radar hot spots for the Typhoon, There not in the places that most forum speculation has assumed, if its at all accurate.

Cheers
and thanks Tmor

Eurofighter_Capability.pdf (http://morisson.thomas.free.fr/Eurofighter_Capability.pdf)
JSF_Capability.pdf (http://morisson.thomas.free.fr/JSF_Capability.pdf)
Gripen_Capability.pdf (http://morisson.thomas.free.fr/Gripen_Capability.pdf)

jwcook
22nd May 2007, 00:01
The IRST issue is an interesting one. I don't think anyone has quoted an official, unclassified range for any IRST, which in any event would need to be qualified for target size and thermal signature - which is affected by speed, altitude and propulsion mode - not to mention altitude and weather. There are also IR suppressive coatings and (at least in theory) the ability to cool things. However, IRST has presumably improved with time (physics not, processing yes) and has its advantages.
There have been some quotes that suggested a range of ~80nm for a fighter sized object (this was quite a while back now, So I assume that PIRATE has changed a little bit).
It all depends on the conditions, and its also been said the Pirate system has picked up Venus:), so range is rather dependent on the objects tempreture and its background context.

Are there any public domain pictures taken from a pirate sensor?