Giovanni de Brigante. 1920s Air Racer Source: Corbis |
He was one of the daring European air race pilots of his day. He probably understood his flying machine, how to extract the most performance from it, what was critical to the successful operation of the plane and where its technological standing was relative to the existing state of the aeronautical art in his time. He probably knew what he was talking about when it came to bleeding-edge technology of the day.
This is Giovanni de Briganti (with an 'i'):
Giovanni de Briganti: Aero 'Jpournalist' (graphic by SMSgt Mac) |
This Giovanni de Briganti is… none of the above.
This Giovanni de Briganti pens what is IMHO best described
as Euro-propaganda with an aeronautics angle. He's written some incredibly stupid things about ‘some’ advanced
aerospace projects. To this observer, it appears his targeted ‘some’ projects are selected according to a ratio inverse
to amount of advertising space purchased on his website. (Just Sayin'!)
His latest (perhaps even “Euro-sponsored”?) piece is a doozy. We could take him to task for trying to pass
off the simplistic logic he uses to redefine fighter generations, or how he relates a
simplified (for simpletons?) narrative on the state of the F-35’s HMD (a better
one here). among other things. He manages to repeat every Euro-canard program’s
PR trope on sensor-fusion and interoperability in going down the list of ‘5th
Gen’ capabilities as well.
But to save time and really highlight that Mr. de Briganti
knows NOTHING about the key technologies involved and which he feels empowered to write about, let us use his own words
concerning Low Observability, aka ‘Stealth’.
Only part of two paragraphs are necessary to show Giovanni
de Briganti is a complete tyro when it comes to modern fighter technology. de Briganti's first revelatory failure:
In any case, detection by radar
matters less and less because by switching on its radar a fighter becomes as
visible as someone turning on a flashlight in a dark room.
Which seems almost verbatim what the once-highly respected
Thomas S. Amlie* tried to claim concerning the B-2’s ‘Low Probability of
Intercept Radar’ (LPIR). F-22 and F-35 AESA
radars are of the very latest generation of Active Electronic Scanned Array
(AESA) systems. AESA’s are such a good idea, ‘4th Gen’ aircraft
makers (including LM with the F-16) are scrambling to field AESAs on older
aircraft. Installations on older designs can be problematic from a
power/cooling perspective so there may tend to be more trade offs in radar performance
to make the newer radars compatible with older systems, but that is beside the
point. The point is, there is a tremendous effort going on to come up with ways
that would make AESAs more ‘detectable’ because
finding them, tracking them, and locking on to them is for all practical
purposes, nearly impossible to do reliably. And that my friends is NOT at all the same as
becoming “as visible as someone turning
on a flashlight in a dark room”. If Mr de Briganti had anything close to a clue concerning AESA radar technology, he seems to have lost it. Mr. Amlie was wrong because he didn’t know about new and then mostly classified technology. Mr. de Briganti apparently isn’t aware of twenty-year (plus!) old unclassified technology because....he's ignorant?
de Briganti’s second failure:
So
the preferred detection sensors are optical, like Infra-Red Scan and Track
(IRST), and in this case the large and very hot exhaust plume of the F-35’s
45,000-lb thrust engine is as visible as a blowtorch in the same dark room.
Heh. I’ll just repeat
part of the observations I made over at Solomon’s SNAFU! blog a little while back (Typos corrected of course) :
IRST tracking is a short range capability. Just like for
visible light digital detection systems, digital infrared detection requires at
a minimum 1 pixel with detectable contrast to surrounding pixels. (Analog
systems, such as the human eye require 1/2 arc-seconds 'width' contrasting
against the field of view).These are clear-sky minimums. Any kind of moisture
in the air between target and detector, or behind the target will reduce
detection range. Typical operating altitudes commonly have a lot of this
moisture equal or above them.
The total target contrast is attenuated by the physical
properties of the atmosphere itself. The major constituent gases 'absorb'
Medium IR frequencies, and those just happen to be the part of the bandwidth
emitted by the jet exhaust. The Low IR and High IR bands aren't absorbed nearly
as much, so the management of these emissions is accomplished by selection of
outer mold line shaping, coating colors and surface textures. And then you
get to F-35 formations, tactics and sensor fusion. Sneaking up on an F-35 with
an IRST will be a very dangerous game for the attacker …
…. Just because you can see a LO asset doesn't mean you can
engage it. If you can engage the LO asset, it doesn't mean you can actually hit
it. Think about it -- there's a reason why we've [US have] never gone in big on
IRSTs for air-to-air combat.
So much for the hyperbolic blowtorch.
He should read more. Suggested topic: Kill Chain. Then he couldn't help to write less drivel.
Now the only question is: are we prepared for the 'gems' he'll present in his "Part 2"?
*If you want to read where Amlie really ‘stepped in it’ (his
failure was that his technical knowledge of radar was past its expiration date
and he wrote his argument down for the world to see) get a copy of the book The
"Pentagon Paradox" and read Appendix C (pp355-56) for his letter (with
equations!) describing how a dish antenna system would always be detectable. Too bad a LPIR radar doesn't use a dish. Mr. Amlie passed away fairly recently, and I find it
fitting that the obituaries seem to have overlooked this singular event, as it probably
did not rise to be worthy of mention on the balance sheet of an otherwise outstanding career.
3 comments:
They are both de Briganti with an "I" ...trust me
In general I feel disagreement could be expressed less abrasively.
Heh. When I first went to the link where the pic was they had it misspelled then (now?). Anyhooo, I was told the Euroshill hisself was using that pilot photo on his Twitter file.
P.S. I save 'abrasive' for the more egregious offenders of truth and logic. De Briganti qualifies.
I need to update some of this post, as I've decided a PhD would be a waste of time for me, but the 'civility' part still applies:
http://elementsofpower.blogspot.com/2006/02/cautionary-note-on-civility.html
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