Indeed the E190’s (and most other planes) we use are inaccurate on their own for simbrief. However, we’ve done the following:
Created a custom simbrief fleet with appropriate passenger limits
Run extensive testing to confirm performance factors (for example, with a jetBlue passenger load, we’ve found that the E190 runs on a simbrief Perfomance Factor of -9, but it is still a bit squirrelly)
For example: (and I’m adding you to this @schyllberg so that perhaps you can make use of some of our data here)
Our simbrief fleet is setup like this:
Our A320 is setup like this:
Note the performance factor of -15
We’ve changed the weights to match exactly what IF says and also changed the maximum pax to what jetBlue uses-including recently changing our A320 to hold 162 pax. With that in mind however, changing the pax number in simbrief doesn’t particularly matter as the simbrief weight for pax of 230lb doesn’t match up to the IF pax weights for the same number of pax.
The trick to this is to setup your pax and cargo weights FIRST in IF-like this:
Notice we’ve taken all the fuel out, set our passengers and cargo to get a Zero Fuel Weight of 132,070 lbs. We then take that ZFW number (rounding up to 132.1) and set it in SB as seen below:
The ZFW is the ONLY weight we touch in SB, we leave the pax and cargo settings alone/in auto. If you’re at a big/busy airport like KATL adjust the sliders for taxi time accordingly. (15min=300lb for our A320)
Also notice the climb/descent profiles. We climb out as prescribed by simbrief, 250kt to 10K, 300kt above 10K, .78M from 280 to cruise alt, then .80M for cruise and then the REVERSE of that in the descent. We also use the simbrief TOC waypoint and set it in In Flight Assistant’s VNAV but not their TOD as there are often crossing/speed restrictions on the arrivals that SB seems to ignore. 🤷♂️
Generating our flightplan gives us our fuel load of 16188lb, so we load as close to that as possible and again, mind you-the taxi times matter.
I was able to get 16197lbs loaded but generally, within 50-100lb will work.
If you take off at the SB takeoff weight using ~90-95% power (more weight=more power) you’ll have burned ~300lbs taxiing, rotate and climb out sensibly (eg: no yanking and banking or rushing to cruise altitude!) at V2+15 or so to 1500’ AGL, then reduce your thrust, pitch down and accelerate to 250kt settling in at around ~2200-2400 VS til 10K, reducing VS to accelerate to 300kt above 10K and you climb at a VS to hit the SB top of climb waypoint at your TOC, then you’ll be within +/- 200lbs of the simbrief calculations for fuel burned and within +/- 400lbs of fuel remaining on each of your waypoints going forward.
For example as shown here, at the waypoint OTK you’d have between 12.3 and 11.7 remaining fuel and you’d have burned between 4.0 and 4.2
A few side notes to this
The numbers at each waypoint are very close on -15 but in the high drag configuration when landing the burn can go up a bit more.
For some reason IF always has a touch more remaining than has been burned even when the fuel is within 50lb or right on the money-for example if I taxi and burn my 300lb allotment, I should have roughly 15897 left, usually it’ll be 75-100lb more. Dunno why this happens.
You may be or SEEM behind the curve for a few waypoints on a longer flight and/or see the red warning for ETD/FUEL, the red WILL go away and you will likely catch up/be close to the simbrief numbers a few waypoints down the line.
If you cruise at less than FL280, you MUST pay attention to the IAS indicated at each waypoint and fly it at your cruise level.
See the pic here:
You can indeed set stepclimbs on longer flights.
I know this might seem complex, but with having the aircraft plugged into SB, it only takes a few minutes to setup.
If anyone has any questions or would like some copies of our aircraft numbers, please don’t hesitate to reach out.
I also must give credit to @Aquila for the info on how to set this all up.