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[WIP] Level Acceleration time is off by as much as 38% (or more in one case)


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Posted

Test conditions:

Standard day, GW 20000 lb, no stores.

 

Note: we consider a drag index of 0, because DCS doesn't simulate pylon drag and weight even though pylons are attached to the aircaft

 

MIL POWER ACCELERATION

 

Sea level, acceleration at MIL power, from 200 KIAS to 550 KIAS

 

Real life: 29 seconds

DCS: 35 seconds

 

 

10.000 feet, acceleration at MIL power, from 200 KIAS to 550 KIAS

 

Real life: 48 seconds

DCS: after 1 minute 30 seconds, the aicraft reaches a top speed of 543 KIAS

 

 

As a test, even if we considered the drag of the pylons that are visible on the F-16 3d model (even though I am sure this is not calculated in the FM), this would amount to a drag of ~65.

 

For a drag of 50, the results would be:

 

10.000 feet, acceleration at MIL power, from 200 KIAS to 500 KIAS

 

Real life: ~41 seconds

DCS: 48 seconds

 

MAX AB ACCELERATION

 

Sea level, acceleration at MAX AB power, from 200 KIAS to 750 KIAS

 

Real life: 25 seconds

DCS: 30 seconds

 

10.000 feet, acceleration at MAX AB power, from 200 KIAS to 750 KIAS

Real life: 34 seconds

DCS: 47 seconds

 

 

 

All tests were performed starting from a speed lower than 200 Kts to allow time for the engine to spool up, I started timing when the speed passed 200 Kts and stopped once it reached the 500, 550 or 750 markpoint according to each test.

 

Track attached in case it's needed.

F-16 level acceleration discrepancies.trk

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  • ED Team
Posted (edited)

Hi, thanks for the report, but as we said, the engines are still being tuned, so best to wait till the dust settles on that. Thanks.

 

We also need to know what the real world example is that is being compared to as well, to make sure you are comparing to the correct version.

Edited by NineLine

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