Hi all I am seeing very high N1 fan speeds when on approach with flaps 30 at around 80-82% N1. I cannot believe that this is how the real bird operates and would like someone to shed soem light on why this might be happening. I have not altered the airfile or aircaft.cfg file in any way so I am peplexed as to why I am seeing such high N1 speds. my weight on landing was 112,000 lbs for my last flight . regards, J Stevens CYOWP.S. I wanted to attach a picture but for some reason when I upload it and then close the attchment window it brings me back to the login window-why??

I cannot believe that this is how the real bird operates That's pretty confidant isn't it J? If you are at LEVEL flight at flaps 30 what do you think the engines will be doing? For approach one starts out about 60% N1. You ever hear a NG on approach before the FAF with flaps 30 deployed? [h4]Best Wishes,Randy J. Smithhttp://www.precisionmanuals.com/images/forum/betaimg.jpgAMD 64 3200+ | ASUS KV8 DELUXE | GFORCE 5700 ULTRA @535/1000 | WD SATA 80 GIG | 512 DDR 400 |

well I was under the impression that due to the aerodynamics and the fact that the wings would probably give quite a bit of lift that it would be more in the 60-65% N1 NOT 80%. anyways I would like a real NG pilot or perhaps the guy that designed the flight model for this aircraft to respond. J Stevens

Well sure maybe EV is around and can comment on this or one of the many pilots who visit here. I can say thatthe PMDG model is the most accurate ever made for FS in regards to an airliner and I have 100% confidance in it being dead on ;-)[h4]Best Wishes,Randy J. Smithhttp://www.precisionmanuals.com/images/forum/betaimg.jpgAMD 64 3200+ | ASUS KV8 DELUXE | GFORCE 5700 ULTRA @535/1000 | WD SATA 80 GIG | 512 DDR 400 |

I remember reading in the manual (8-38 rev1.4) regarding reduced thrust clims that a 3% decreace in N1 resulted in a 8% decreace in thrust, and that a 6% decreace in N1 resulted in a 16 % decreace in N1. So whilst it may be numerically high it is perhaps not so high in thrust terms.Also where are you flying, what altitude and how hot is it. I thought that both altitude and temperature would affect N1 speeds.There is one other possibility that I have occasionally done (a-hem) when first flying the 737NG. If I had been using spoilers in flight to reduce airspeed I sometimes forgot to stow them on arriving at the desired airspeed. See if this is part of your landing "procedure", it would definitely equate with high N1.cheers, Nick

Hi,In the real aeroplane a Flaps 30, 3 degree descent (this is a normal ILS approach) you will be around the 60%N1 figure. If you are flying level.. which would be highly unusual IRL .. then you would need a HEAP of power and 80% would be a ball-park, pluck-a-number-out-of-my-bum guess at it :)Do you by any chnace have the speedbrakes out? That will certainly require a lot of wasted fuel and excess noise. IRL Speedbrakes should not be used at greater than Flap 10 or below 1000' AGL (from Mr Boeing)This help at all?Brad Marsh

Hey J,Never had it up at 80% N1 on finals, normally it won't go above 60. It's usually down at the mid 40's to 50's. Even landing the 900 at Mlw and flaps 40 didn't require it that high. As Nick points out, if your at a hot and high airport your RPM will be higher than usual. Can you give more specific details? I.e. Where you were landing, weather at the time, which aircraft, what loading config etc.As for the attachment - I've no idea what's going on, usually works without a hitch.Randy, no need to be so nippy and blunt with him, he was only asking. CheersDavid

Please do not preach forum ethics to me David, I said nothing rude to J just commented on his aboslute statement which was both a comment and a question..[h4]Best Wishes,Randy J. Smithhttp://www.precisionmanuals.com/images/forum/betaimg.jpgAMD 64 3200+ | ASUS KV8 DELUXE | GFORCE 5700 ULTRA @535/1000 | WD SATA 80 GIG | 512 DDR 400 |