JamesA321 Posted June 19, 2021 Report Share Posted June 19, 2021 Hi everyone, Just out of curiosity, what do people use for performance calculations? I've been using the well-known freeware calculator available on the Xplane forums. I know there is also Qsimplanner but that only gives you flex temps. But my main problem is figuring out what the CG of the aircraft is? It's so annoying because the load factor can be loaded via the Feelthere payload manager but not the fuel, so then you have to do that manually via P3D. Considering all this I still have no indication of what my CG is, which surely is critical for performance. Link to comment Share on other sites More sharing options...
JamesA321 Posted June 19, 2021 Author Report Share Posted June 19, 2021 Just to add, when mentioning the CG for performance calculations. This is critical for the correct trim settings on takeoff. But the manual doesn't contain this information... Link to comment Share on other sites More sharing options...
scoobflight Posted June 19, 2021 Report Share Posted June 19, 2021 The simulation doesn't change CG based in load. Link to comment Share on other sites More sharing options...
JamesA321 Posted June 19, 2021 Author Report Share Posted June 19, 2021 @scoobflightSorry what do you mean? Link to comment Share on other sites More sharing options...
scoobflight Posted June 20, 2021 Report Share Posted June 20, 2021 There is only one station in the simulation so changing payload (aka passengers, cargo and fuel) doesn't move the CG. Link to comment Share on other sites More sharing options...
JamesA321 Posted June 20, 2021 Author Report Share Posted June 20, 2021 Oh really! What would be the best CG to enter into the performance calculator then? As it gives a different trim setting for different CG entries? Thanks Link to comment Share on other sites More sharing options...
atav757 Posted June 20, 2021 Report Share Posted June 20, 2021 13 hours ago, scoobflight said: There is only one station in the simulation so changing payload (aka passengers, cargo and fuel) doesn't move the CG. Not quite true, a change to any of those stations (even though there is only one station per load) has an effect on the CG in the simulator. You can see this because the CG indicator moves when you add / remove fuel and pax. 4 hours ago, JamesA321 said: Oh really! What would be the best CG to enter into the performance calculator then? As it gives a different trim setting for different CG entries? Thanks I'll try and come up with an excel based CG calculator you can use for the Embraer. But does the calculator you use give you trim settings? If so I'd love to know which it is! I've been using airplane toolbox. Link to comment Share on other sites More sharing options...
C2615 Posted June 20, 2021 Report Share Posted June 20, 2021 I have the realworld data table for Trim setting for 170/175and 190, but it just doesn't help for feelthere's Ejets at all. As scoob said, CG is not simulated, and also even the green band of trim on E190 is totally out. 2 Link to comment Share on other sites More sharing options...
JamesA321 Posted June 21, 2021 Author Report Share Posted June 21, 2021 @atav757This is what I thought! If you google Ejets performance calculator it's the only one on the Xplane forums. Really good calculator to be honest. It's give V speeds and trim settings. But you need to enter a CG for accurate calculations. 1 Link to comment Share on other sites More sharing options...
JamesA321 Posted June 21, 2021 Author Report Share Posted June 21, 2021 @C2615 This is bad on Feelthere's half if this is true. All other good paywear airliners have accurate CG etc representation if that makes sense... 1 Link to comment Share on other sites More sharing options...
Matty260191 Posted June 23, 2021 Report Share Posted June 23, 2021 the cg doesn't change so the trim wont just the speeds. use that calculator and put 20 or something for CG its irrelevant in this aircraft for now. I use that calculator with qsim planner for working out flex. Link to comment Share on other sites More sharing options...
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