martinpk

Thanks Dan, I do agree with you on the HMU. If the engine had redlined the numbers will be showing red as an exceedence. As stated I am just not used to seeing such a high N2. PMDG has made a terrific job modeling the aircraft and look forward to the new B747-400.

Okay, I guess that I am just used to operating the smaller fan engines. I did have an AMM and here are some numbers. These are for the GE90-100 series engines. N1 max 2602 rpm - 110.5 percent, N2 max 11292 rpm - 121.0 percent. For a typical max take off power run these are the numbers: Air temperature of 75 degrees, N1 81.24 percent, N2 109.1. these numbers used for power assurance runs to ensure that the engine will make takeoff power with out exceeding EGT limits. Thanks to all, Martin Picke'

Thanks folk, Maybe then I stand corrected. I am a commercial pilot and aircraft mechanic. I have spent many hours on the flight decks of most of the Boeing and Douglas fleet performing various functions and tests. Been around the CFM56,CF6,RB211 and PW engines but very little time on the B777 variants. I can't give exact numbers from a graph as I don't have access to an AMM or ops manual. From what 777 simmer and skelsey have both stated with numbers, perhaps I am incorrect although 108 does seem rather high for a derated power setting 94 percent. The aircraft use a squat switch that senses weight on wheels, this puts the aircraft in ground mode so the engine goes from flight idle to ground idle. Flight idle is higher due to the chance having to perform a go around. I will do a little more research and see what I find. Martin Picke'

Hello Kyle, I based my observations on the previous FSX install and real life operation of turbine engines. At idle I get 70 percent N2 which is closer to a flight idle rpm than a ground idle, should be about 60-65 percent. At a takeoff power of 94 percent N1, I am getting an N2 of 108 which is at the redline and to high in relationship to the N!. I would expect somewhere around 98 to 102 percent N2. As stated if this is an issue with the steam edition or the update. Any help would be appreciated. Thanks, Martin

Just installed the latest version of the PMDG B777 in to FSX Steam. I noticed that the N2 engine indicator is reading about 10 percent to high. Not sure if this is a problem relating to FSX Steam or not. I do know that the previous version that was installed in FSX non steam reads correctly. Wondering if anyone else has seen issue. Not sure if it has something to do with simconnect. Thanks.