reported earlier INACCURATE TOT FUNCTION

[Gizzy]

Keeping TOT indicator aligned results in significant errors upon arrival at TGT WP.  Attached example is arout 50 seconds early on a 8min flight.

Screenshot, track & miz attached.
 

Thanks...

nullnull

inaccurate tot.trk

crazy file size limit.  miz file available if desired.  Thanks

[Gizzy]

Looked into this further, it was mentioned here long ago in 2019 that if you enter GROUNDSPEED for the last leg from IP to TGTWP then the TOT function becomes inaccurate - it seems DCS / F18 cannot handle the demanded change of speed from IP to TGT.

I've no idea if this was ever fixed or formerly reported as a BUG and has now reappeared.... no idea.

So, please report this matter  and hopefully it can be sorted ...

To clarify if you do not enter GROUNDSPEED in the HSI / DATA / SEQ  and then follow the fast / slow indications it all works fine, on time.....

Thanks

[Frederf]

They must not have done the math right for the fixed leg case.

[maxTRX]

I gave it a shot and it was close enough for the government (whichever government that may be... :/)   I dropped 8 Mk83's on a column of trucks and tanks from a loft delivery and had to break away around 3nm from TGT. At that point I had 20 secs to go, for 15:12Z TOT.  I watched the targets on FLIR and at the time the bombs hit the AUTO midpoint, I had 2 secs to go.

https://youtu.be/OgSoKmdLN68?t=116

 

[BIGNEWY]

Hi, 

we do already have a report open for checking TOT

thank you