Simviation Forum - Learjet at high altitude

Apr 1^st, 2004 at 6:58am

baypilot Offline
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Queensland, Australia

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According to the specs in FS2004 the Learjet 45 has a service ceiling of 51,000 feet. I've tried flying it to this height, but at 47,000-49,000 feet it becomes unresponsive and threatens to stall. IAS is around 105 knots with N1 at full power. I have the de-icer on and have reduced the fuel load to 20%, but can't get it to the specified ceiling. Any ideas?

A lousy day's flying beats a good day at the office every time.

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Reply #1 - Apr 1^st, 2004 at 8:47am

garymbuska Offline
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The specs might not be correct and may appaly only with certain conditions. ALTIMETER setting and overall weight of aircraft could also effect the service celling. I fly the lear alot but have never tried to reach its service celling. Because in the real world this is something you would not do unless you had no other choice such as to fly over weather. But try different weights and fuel loads and change the altimeter setting and see if that will allow you to do this. Roll Eyes

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Reply #2 - Apr 1^st, 2004 at 6:10pm

Aviator Offline
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Hi there....

try to climb after passing FL290 on mach number ...may be MN.82 or MN.84 will do the job.

Best wishes.

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Reply #3 - Apr 1^st, 2004 at 7:11pm

nickle Offline
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San Diego, Ca

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Good point on Mach .82 or .84.
REM: Service ceiling is defined as the altitude at which the a/c will climb at 100 (one hundred) feet per minute.
Has much to do with weight. Bet your petut that fuel is near flameout.
Did I mention that performace is predicated and adjusted to standard day?

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Reply #4 - Apr 2^nd, 2004 at 4:23am

IanK Offline
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my Harrier?

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Hi,
there lots of different LRJs. You are quoting the specs for the turbojet LRJ from FS4 to ? but the newer LRJs in FS2K are turbo fans and don't have anything like that ceiling. Check the model number it is and use those specs

Ceiling FL450 for newer ones??

Ian

Quote:

According to the specs in FS2004 the Learjet 45 has a service ceiling of 51,000 feet. I've tried flying it to this height, but at 47,000-49,000 feet it becomes unresponsive and threatens to stall. IAS is around 105 knots with N1 at full power. I have the de-icer on and have reduced the fuel load to 20%, but can't get it to the specified ceiling. Any ideas?

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