August 12, 20223 yr So I ran across an interesting topic while scrolling. With the LearJets, someon here are claiming that on takeoff the pilots just sent the throttles all the way to the wall and then a click down. Some claim all the way to the wall and just leave it. Then there’s me that for the past 2 years have just been setting my N1 to 96%. Or as close to it as I can. So which one is correct? Because if I just set full power my N1 speed would be above 100% which would damage the turbines in real life right?
August 12, 20223 yr 39 minutes ago, Deltaair1212 said: So which one is correct? I can't advise on the Learjet specifically, but some general factors apply to all jet aircraft. Firstly, all jet engines are rated for use at full power, subject to temperature limits, but they may also have time and minimum altitude restrictions. There will usually be additional operating limits placed on the use of full power, to increase engine life and reduce costs. Using maximum power, within the engine restrictions, will not cause any immediate damage to the engine, but will result in reduced engine life and usually, increased fuel consumption, compared with using lower power settings. In real life, with all aircraft types, the various operators will decide what limits to apply to takeoff and emergency power settings, based on advice from the engine and airframe manufacturers. The over riding factor will usually be cost efficient operation. The general principal is to use sufficient power to achieve a safe takeoff and acceleration on climbout for the runway in use and the prevailing weather conditions. On some aircraft that may mean quite often using close to full power, while others may have sufficient power to rarely require more than 90 per cent unless the runway is very short. Hopefully there will be a real life Learjet pilot on here to give more specific details. John B
August 13, 20223 yr 52 minutes ago, Biggles2010 said: Hopefully there will be a real life Learjet pilot on here to give more specific details. richjb2 is a "real life" Learjet pilot and was a Learjet instructor at Flight Safety. https://www.avsim.com/forums/topic/618054-takeoff-thrust-settings/ Al
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