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Carbon aerogels have a shorter history than silica aerogel, but they also possess remarkable properties and promising applications. One simple property is extreme blackness, caused by internal scattering and absorption of light by the graphite molecules that make up the aerogel (Figure 5). In a broad wavelength range from 0.25 to 14.3 µm, the reflection coefficient of carbon aerogels is only 0.3%. This makes the material ideal for some forms of solar-energy collectors.
New applications continually turn up for carbon aerogels, which come in a variety of forms. University of Cambridge physicists this year announced the production of a carbon aerogel made not of graphite particles but of nanotubes (see The Industrial Physicist, August/September 2004, pp. 13–14, "Smoke spun into fiber", item 4). The aerogel is highly elastic rather than rigid, so it can be spun into pure nanotube fibers with unique electrical properties and a strength greater than that of Kevlar.
Originally posted by clay2 baraka
Originally posted by prevenge
in the TR-3A and B what's the T and R stand for?
TR = "Tactical Reconnaissance"
SR = "Strategic Reconnaissance"
Originally posted by sovietman
well there is some evidence for the tr-3a triangular flying wing recon aircraft actually...
there were some sightings and of course the gap... such a plane would be very usefull today and there is no such project in white world... there is also huge black budget, while only few UAVs were made public... and it is known that northrop grumman (has much experience with flying wings) got a huge amount of money for "black projects"...
Originally posted by Aziroth
The T and R come from the company who patented the crafts, Teledyne Ryan, the company was bought out by Northrop Grumman in the late 90s. The TR-1 was the U2 bomber and the TR-2 was an unmanned spy plane resembling the Predator. All of these concepts were patented back in the late 70s, most were never built, but they were all progressive for their time, which gave in to the "alien design" nature of these crafts by TR.
The second production batch of the U-2R was initially designated TR-1A (and TR-1B for the two-seat trainer). This was purely for political reasons, to emphasize the reconnaissance role of the aircraft. While the "R" primary mission letter and the design number 1 are text book examples for correct use of the designation system, the "T" prefix letter is not! In the TR-1, it stands for "Tactical", apparently to contrast it from the "SR - Strategic Reconnaissance" designator of the SR-71. In 1991, when the Cold War and the need for such "diplomatically correct" designations had ended, the TR-1A/B was redesignated as U-2R/TU-2R.
Originally posted by Aziroth
Now my opinion if it is worth anything, is that the crazy triangle craft that everyone is seeing out of area51 is the prototype for the B2, they only built 1 or 2 before they decided to go with the project and build the final B2 that we all know and love. Other tid bit of fun, Teledyne Ryan was the company to create the zero dialectic paint they use on the B2, x-44, tr-3, and some variants of the f-35.
[edit on 21-9-2009 by Aziroth]