UK Stealth Drone Unveiled
The Brits want to get out of the traditional fighter jet business, and start putting robots in the cockpits, instead of blokes.
After the F-35 Joint Strike Fighter is done, the Ministry of Defence is looking to build unmanned combat aerial vehicles, or UCAVs, according to Jane's International Defence Review. But developing killer drones takes time. So Brits are working now with the American military on a "Project Churchill... an effort that is focused on the joint, airborne command and control" of the UCAVs."
The drone pictured here -- called the Corax -- is one of two robo-planes that the Ministry will use as platforms for their UCAV development. (Jane's doesn't mention whether the cancellation of the American killer drone effort will affect the project. One suspects it might.)
"The jet-powered Corax had performed several successful flights as early as 2004 – taking off and landing under computer control," New Scientist notes. "The aircraft is curved in a manner than resembles existing 'stealth" aircraft. The special shape of such craft is designed to defeat radar detection by reflecting radar away from a radar sensor instead of back at it. Corax also lacks a conventional tail, which should make it more aerodynamic but also more difficult to control."
All of which reminds Jane's of the infamously secretive DarkStar stealth drone, cancelled in 1999. It also had "a tail-less configuration, and a long-span unswept wing mounted at the rear of a short body section."
However, there are important differences. The body section is straight-edged and pointed rather than being a half-disc shape. The wing is tapered and mounted relatively further forward, and there are two pitch-control surfaces on each side of the exhaust. This avoids one problem with the DarkStar, which was the limited pitch authority available from the win trailing-edge surfaces: a factor in the loss of the first DarkStar in April 1996. Compared with DarkStar, which was designed with an emphasis on a low side-on signature - matching its side-looking sensors - Corax is optimised for all-round stealth.
(Big ups: JQP, SH)
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EAP:
Once upon a midnight dreary, while I pondered, weak and weary,
Over many a quaint and curious volume of forgotten lore,
While I nodded, nearly napping, suddenly there came a tapping,
As of someone gently rapping, rapping at my chamber door.
" 'Tis some visitor," I muttered, "tapping at my chamber door;
Only this, and nothing more."
Ah, distinctly I remember, it was in the bleak December,
And each separate dying ember wrought its ghost upon the floor.
Eagerly I wished the morrow; vainly I had sought to borrow
From my books surcease of sorrow, sorrow for the lost Lenore,.
For the rare and radiant maiden whom the angels name Lenore,
Nameless here forevermore.
And the silken sad uncertain rustling of each purple curtain
Thrilled me---filled me with fantastic terrors never felt before;
So that now, to still the beating of my heart, I stood repeating,
" 'Tis some visitor entreating entrance at my chamber door,
Some late visitor entreating entrance at my chamber door.
This it is, and nothing more."
Presently my soul grew stronger; hesitating then no longer,
"Sir," said I, "or madam, truly your forgiveness I implore;
But the fact is, I was napping, and so gently you came rapping,
And so faintly you came tapping, tapping at my chamber door,
That I scarce was sure I heard you." Here I opened wide the door;---
Darkness there, and nothing more.
Deep into the darkness peering, long I stood there, wondering, fearing
Doubting, dreaming dreams no mortals ever dared to dream before;
But the silence was unbroken, and the stillness gave no token,
And the only word there spoken was the whispered word,
Lenore?, This I whispered, and an echo murmured back the word,
"Lenore!" Merely this, and nothing more.
Back into the chamber turning, all my soul within me burning,
Soon again I heard a tapping, something louder than before,
"Surely," said I, "surely, that is something at my window lattice.
Let me see, then, what thereat is, and this mystery explore.
Let my heart be still a moment, and this mystery explore.
" 'Tis the wind, and nothing more."
Open here I flung the shutter, when, with many a flirt and flutter,
In there stepped a stately raven, of the saintly days of yore.
Not the least obeisance made he; not a minute stopped or stayed he;
But with mien of lord or lady, perched above my chamber door.
Perched upon a bust of Pallas, just above my chamber door,
Perched, and sat, and nothing more.
Then this ebony bird beguiling my sad fancy into smiling,
By the grave and stern decorum of the countenance it wore,
"Though thy crest be shorn and shaven thou," I said, "art sure no craven,
Ghastly, grim, and ancient raven, wandering from the nightly shore.
Tell me what the lordly name is on the Night's Plutonian shore."
Quoth the raven, "Nevermore."
Much I marvelled this ungainly fowl to hear discourse so plainly,
Though its answer little meaning, little relevancy bore;
For we cannot help agreeing that no living human being
Ever yet was blessed with seeing bird above his chamber door,
Bird or beast upon the sculptured bust above his chamber door,
With such name as "Nevermore."
But the raven, sitting lonely on that placid bust, spoke only
That one word, as if his soul in that one word he did outpour.
Nothing further then he uttered; not a feather then he fluttered;
Till I scarcely more than muttered, "Other friends have flown before;
On the morrow he will leave me, as my hopes have flown before."
Then the bird said, "Nevermore."
Startled at the stillness broken by reply so aptly spoken,
"Doubtless," said I, "what it utters is its only stock and store,
Caught from some unhappy master, whom unmerciful disaster
Followed fast and followed faster, till his songs one burden bore,---
Till the dirges of his hope that melancholy burden bore
Of "Never---nevermore."
But the raven still beguiling all my sad soul into smiling,
Straight I wheeled a cushioned seat in front of bird, and bust and door;
Then, upon the velvet sinking, I betook myself to linking
Fancy unto fancy, thinking what this ominous bird of yore --
What this grim, ungainly, ghastly, gaunt and ominous bird of yore
Meant in croaking "Nevermore."
Thus I sat engaged in guessing, but no syllable expressing
To the fowl, whose fiery eyes now burned into my bosom's core;
This and more I sat divining, with my head at ease reclining
On the cushion's velvet lining that the lamplight gloated o'er,
But whose velvet violet lining with the lamplight gloating o'er
She shall press, ah, nevermore!
Then, methought, the air grew denser, perfumed from an unseen censer
Swung by seraphim whose footfalls tinkled on the tufted floor.
"Wretch," I cried, "thy God hath lent thee -- by these angels he hath
Sent thee respite---respite and nepenthe from thy memories of Lenore!
Quaff, O quaff this kind nepenthe, and forget this lost Lenore!"
Quoth the raven, "Nevermore!"
"Prophet!" said I, "thing of evil!--prophet still, if bird or devil!
Whether tempter sent, or whether tempest tossed thee here ashore,
Desolate, yet all undaunted, on this desert land enchanted--
On this home by horror haunted--tell me truly, I implore:
Is there--is there balm in Gilead?--tell me--tell me I implore!"
Quoth the raven, "Nevermore."
"Prophet!" said I, "thing of evil--prophet still, if bird or devil!
By that heaven that bends above us--by that God we both adore--
Tell this soul with sorrow laden, if, within the distant Aidenn,
It shall clasp a sainted maiden, whom the angels name Lenore---
Clasp a rare and radiant maiden, whom the angels name Lenore?
Quoth the raven, "Nevermore."
"Be that word our sign of parting, bird or fiend!" I shrieked, upstarting--
"Get thee back into the tempest and the Night's Plutonian shore!
Leave no black plume as a token of that lie thy soul hath spoken!
Leave my loneliness unbroken! -- quit the bust above my door!
Take thy beak from out my heart, and take thy form from off my door!"
Quoth the raven, "Nevermore."
And the raven, never flitting, still is sitting, still is sitting
On the pallid bust of Pallas just above my chamber door;
And his eyes have all the seeming of a demon's that is dreaming.
And the lamplight o'er him streaming throws his shadow on the floor;
And my soul from out that shadow that lies floating on the floor
Shall be lifted---nevermore!
Posted by: Wolf at February 9, 2006 12:27 PM