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Topic: 421


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In the News (Sun 6 Dec 09)

  
  Airliners.net: Cessna 421 & 414
The lineage of the 421 and 414 traces back to the 411, the 421 beginning life as a pressurised development of the 411.
First improvements to the 421 were offered with the 421A of 1969, but the 421B Golden Eagle of 1970 featured a number of significant improvements including lengthened nose and wing span, while the engines retained their power to higher altitudes than before.
The final expression of the 421 was the 421C available from late 1975, with a bonded wet wing and no tip tanks, higher vertical tail, more efficient props and new trailing link undercarriage.
www.airliners.net /info/stats.main?id=154   (470 words)

  
  Markarian 421
Markarian 421, the Brightest Known TeV Gamma-Ray Blazar, by John Mattox (WEBT project)
Markarian 421 across the spectrum, by Bill Keel
Active Galaxy Markarian 421 by Michael Oates (Manchester Astronomical Society)
www.seds.org /~spider/spider/Misc/mrk421.html   (87 words)

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