how to...calculate take off speeds

[dave76]

guys what do you use to clculate take off speeds.......please do not say nothing

Edited May 18, 2023 by dave76

[BuzzLine]

experience  

[razo+r]

Depends on which type of player you are.

The general DCS Sim pilot just pulls on the stick and takes off when the plane takes off.

The more realistic pilot might go on the internet, find the manual with the performance charts in it and do the calculations that are provided by the manual.

[dave76]

Just now, razo+r said:

Depends on which type of player you are.

The general DCS Sim pilot just pulls on the stick and takes off when the plane takes off.

The more realistic pilot might go on the internet, find the manual with the performance charts in it and do the calculations that are provided by the manual.

ok...manual...roger....but a program for performance ( fuel, speeds.....) for dcs does not exist??

[BuzzLine]

Actual F16 manuals are easy to find on the Internet but I'm not sure they can be shared here. The supplement with the appendices has all the charts you may want to use to adjust based on gross weight, altitude, temperature, pitch angle, center of gravity, etc.

I found someone rule-of-thumbed it to "70kts + 3*gross_weight_in_kpound" so a 30k lbs tow gets you 3x30+70=160 t/o speed. Rotation speed is 15kts lower if on afterburner, 10kts lower if dry. That gets you 145/150kts for the rotation which seems about right for a light plane in normal conditions (altitude/temperature-wise).

Edited May 18, 2023 by BuzzLine

[Raptor9]

The DCS F-16 early access guide includes a takeoff speed chart in the Procedures chapter as well as Appendix A. Look for the Takeoff section.

[silverdevil]

i dont know about anyone else, but i just had a RTM moment.

[SickSidewinder9]

Even loaded, you accelerate so fast, it's almost worth it to just start pulling back a little at 150.  As long as you don't pull more than 13 degrees and scrape the tail, you're fine.  Unless you're going for some kind of max performance climb, just bring the nose up to around 10 or so degrees and you take off just fine.  YMMV without afterburner.

[VarZat]

https://www.digitalcombatsimulator.com/en/files/3306442/

[dave76]

thanks Varzat

[Nealius]

Aft stick once above 100kts and wait for the nose to come up; once it does stabilize it at around landing AoA and wait for liftoff 

Edited May 24, 2023 by Nealius

[VarZat]

12 minutes ago, Nealius said:

Aft stick once above 100kts and wait for the nose to come up; once it does stabilize it at around landing AoA and wait for liftoff 

 

Think that would make your takeoff roll longer then it needs to be.

[Nealius]

Depends. In some modules (IIRC the Mirage F1) the procedure is to hold AoA until airborne.

[VarZat]

Would not be the correct way for the F-16.

[Willdass]

Agree with @VarZat. From the -1, page 2-21:

" When airspeed is approximately 10 knots below computed takeoff speed for non-AB or 15 knots for AB, initiate rotation to establish takeoff attitude (8-12 degrees). Do not apply aft stick at airspeed lower than 10-15 knots below computed takeoff speed. Early rotation can lead to overrotation, skipping, wallowing due to early liftoff, and increased takeoff distance."

[ACME_WIdgets]

I just use mild aft stick at 150kts, it will take off when ready. Let the pitch come up to 10 degrees and then neutral stick.

[Braunn]

Yeppers. No need to rotate before take off lift at all. I rarely ever use AB anymore on take off unless the rwy is short. Once you got speed she climbs very fast after rotation. Use the whole runway. 

Edited June 3, 2023 by Braunn