Hi everyone! Since Infinite Flight aircraft often have overpowered performance, I wanted to share a method for estimating their actual thrust using SimBrief.
Step 1: Locate Thrust Selection
In SimBrief, scroll to the bottom of your custom aircraft’s “Airframe Performance” section. Find the “T/O Thrust” entry. Set the unit to “LBF” (pounds of force) for easier adjustments.
Step 2: Select Flat Runways
Infinite Flight doesn’t simulate sloped runways, so choose ones with a 0.00% slope. In SimBrief, go to Performance and Tools and search for flat runways. Examples include KSFO’s 1R/19L and MKJS’s 7/25. Use Maximum Performance settings (full thrust, MTOW, etc.) to ensure accurate data. Note the calculated slope gradient and V1 speeds. Additionally, make sure your altimeter is set to 1013. It’s the standard used in IF and irl. If incorrect, it will mess up the data.
Step 3: Test in Infinite Flight
Spawn at your selected runway. Set the aircraft to MTOW, match all SimBrief settings, and use full thrust until V1. Then, perform a rejected takeoff (RTO):
Use MAX autobrakes (if available).
Apply max reverse thrust until it disengages, then manually brake to stop.
Step 4: Measure Stopping Distance
Estimate the remaining runway using the white aiming point markers (each is 150 feet long). Add their lengths and approximate any smaller gaps to the end of the runway threshold. Additionally, test on the other side of the runway as well and calculate (change runway settings in SimBrief too). Then, average them out.
Step 5: Adjust Thrust Numbers
Return to SimBrief and adjust the T/O Thrust in increments (e.g., 1,000 LBF, then smaller increments like 100 or 10) until your calculated stopping distance matches your in-game results.
Step 6: Repeat as Needed
Refine your numbers with further tests until they closely match SimBrief values.
Why This Helps
Once you’ve calculated accurate thrust, it becomes much easier to plan takeoffs and landings in Infinite Flight. Your performance calculations will be more realistic, helping you achieve smoother and more precise operations.
Good Luck!
P.S. let me know if there’s something wrong in this.