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Originally posted by gariac
reply to post by StargateSG7
This recon F-117 story sounds dubious. By the time the 90s rolled around, we had good satellites. Further, the F117 isn't undetectable, but rather hard to target. Overflights would have been detected. Last of all, aircraft don't really scale. A larger F117 would be a different looking aircraft. Not radically different, but not supersized either. And if the airframe was different, you might as well make it more aerodynamic since the computer simulation for stealth shapes would have surely been advanced for a second generation aircraft.
In 1976 when the Have Blue program was started, the faceted Have Blue hull shapes were drawn BY HAND and verified ONLY by computerized math calculations and real-world flight and model-based wind tunnel testing.
Originally posted by Zaphod58
reply to post by StargateSG7
Having a wide field of view camera on a low flying plane doesn't make sense though. One of the points of the wide field of view camera was for high altitude overflights, so they could see a lot more. At low altitude, you're going to have a very small area that you can see, whether you are using a normal camera, or a wide field of view, just because you're so low.
Aerial re-fueling would have taken place over Thailand/Vietnam or near Japan.edit on 2013/2/25 by StargateSG7 because: more info
The VAX barely worked for engineering. [Yes, I used one.] It wasn't even a one mips machine. If you had a DEC and had money, it was probably the DECsystem 20.
The multi-angle lenses and imagers is probably one reason why the interior of a RECON version of the F-117 would be larger so that cooling systems and gyroscopic stabilizers could be added for those perfectly stable up-close shots.
Before discussing passive radar, several other radar and sensor systems are worth mentioning in terms of counterstealth capa-bility. One of the most significant counters to stealth, namely conventional very high frequency (VHF) and ultra high frequency (UHF) radar, has been around since World War II and is still in use today for long-range air surveillance. Most LO techniques are designed to defeat acquisition and fire control radar in the X band, which uses centimeter wavelength. VHF- and UHF-band radar, however, uses decimeter- to meter-long wavelength. In general, the RCS of an aircraft increases as wavelength of the illuminating radar increases. Furthermore, when the radar wavelength is in the same order of magnitude as the aircraft or parts of it, the radar waves and the aircraft resonate, which significantly increases the RCS of the aircraft.
Originally posted by gariac
At 1500ft AGL, you would need acoustic stealth. ;-)
I had mode-s gear and have caught the FBI doing surveillance/mobile-repeater work at 1500 AGL in a Cessna. Very audible.
I have my doubts about risking a plane as unique as the F-117a for that stupid of a mission.
Thus making it ideal for Pakistan, Afghanistan, Mongolia/China, Yemen, Somalia, etc. The aircraft STILL WORK, they're STILL pretty good at what they do and most modern day threats are NOT coming from Russia or even China, it's the many whatever-'STANS that are causing the problem...and going REALLY LOW and SLOW would make for IDEAL in-yer-face photographic evidence for counter-insurgency or simple troop patrols.