One of the main reasons for the blunt-appearing rounded nose cone on the earlier builds of the Citation series was for the prevention of ice accumulation. A sharp nose cone is better at building up ice compared to a blunt, rounded nose cone.

In the Cessna Citation series, not building up ice on the nose was important as that ice could break loose and get sucked into one of the rear-mounted jet engines, causing engine damage. In the sleek-nosed Learjet 20 and 30 families, anti-icing fluid is "seeped" around the nose cone to prevent ice accumulation that could damage the engines.

Source: Flying, April 2009. "Triple-A rated Plus" by J. Mac McClellan, p40.

While professional golf legend Arnold Palmer is best known for being the first golfer to exceed $1 million in earnings, he also has over 18,000 hours in the cockpit. In 1976 he captained a Gates Learjet 36 dubbed 200 Yankee on a record-setting around the world flight in celebration of the United States Bicentennial. The flight had nine stops and took 57 hours, 25 minutes and 42 seconds.

Palmer currently flies a Cessna Citation X.

Source: Aviation History, May 2009. "Milestones", p15.

*There will be no aviation trivia until Sunday, 22 March as I will be on vacation and am unsure as to what 'Net access I will have. 'Till then, blue skies and VFR!