STT VS TWS tracking and TTI

[captain_dalan]

Hello there. Did some 1 on 1 BVR's last night in the F-14 and as usual, i went up against an AI set to expert, flying the F-15C. I was trying to figure out the best ways to engage AI controlled birds with an AIM-54, both Mk60 A's and Mk47 C's. I used look up, look down and co-altitude patterns, along with cranking and notching. From distances ranging between 20 - 45 NM. Both with a "hard" PD-STT lock, and with a "soft" TWS lock. Aside from the things we already know about the state of affairs in DCS AI's and missile guidance, i notices something else as well.

 

Namely, despite the starting conditions of the engagement being the same or different, the TTI value varied greatly based on which locking method i used. In PD-STT the number was always smaller for launches performed at same mach, altitude and closure values. So, what gives?

 

Is it he trajectory which the missile follows different in PD-STT then it is in TWS? Or is the TTI computed in a different way?

 

Cheers and keep up the good work! Can't wait for the A model and the new missile guidance! :thumbup:

[sLYFa]

Intersting find. I also noticed that TTI is way too high most of the time. I sometimes get the missile hitting the target with 40s on left on the TTI counter(45nm mid altitude TWS shot). Sometimes the difference between projected and actual impact time is less but TTI is always too high in my experience. Is this realistic or will this change someday?

[captain_dalan]

Yeah. This first came to my attention during close range shots, 20-30NM away, 15-35000ft. The TTI went something like 40+s which seamed highly unlikely for such a fast missile, fired from a mach 1.2+ platform at a closing bandit. But i was thinking like, hey, maybe it's the loft or something. And then when going STT (the second part of the session) i noticed TTI times almost halved.

[captain_dalan]

Nobody else noticed this? Weird, i guess virtually everyone uses 54's in TWS then :huh:

 

I guess we'll have to ask HB then, is there an actual difference in the guidance of the missile when fired in STT and TWS?

[dundun92]

Did you look at the tacview ans measure the actual TOF's?

[captain_dalan]

Did you look at the tacview ans measure the actual TOF's?

 

Good call. Just did and it seams like there is hardly any difference. Tried with the ACM cover off too. Still the same. Am/was i hallucinating at the time? :huh: