reported Cold/Hot start difference in post cat shot FCS behavior

[Nealius]

Tracks attached.

In hot starts, cat shots are normal, however from cold starts under the same conditions the FCS does not seem to stabilize and establish climb the same way as it does from a hot start. Both shots are clean aircraft, trim set 16NU per NATOPS and other manuals, MIL shots, hands off all the way through 3,000ft, 27kts WoD (8kts natural wind, 19kts carrier wind).

In hot start behavior once off the deck, the aircraft's vertical velocity is thus: +40fp, -> -20fpm -> positive climb established.
Note at 183kts checkpoint, altitude has increased 10ft and climb is at around +1deg, +400fpm, AoA 5.3.
Note at 1,000ft checkpoint VV is around +13deg of climb, +6350fpm, AoA 3.9.

In cold start behavior once off the deck, the aircraft's vertical velocity is thus: +20fpm -> -170fpm -> 0fpm -> -130fpm -> positive climb established. 
Note at 183kts checkpoint, altitude has not increased and the aircraft is descending at -70fpm, AoA 4.0.
Note at 1,000ft checkpoint VV is around +9deg of climb, +5330fpm, AoA 2.7.

When heavily loaded with ordnance, despite proper NATOPS trim (17NU or 18NU) this is exacerbated, in some cases with my jet wanting to go into the water after launch.

In summary, in cold starts It's oscillating more, descending more, and failing to climb or put on AoA as aggressively as in hot start launches.

Hot start screenshots (183kts checkpoint, 1,000ft checkpoint):

Cold start screenshots of same checkpoints:

 

ColdClean.trk HotCleanNoWait.trk

[Lord Vader]

Hi @Nealius

Most of the times, most people just bump to afterburner and pick up the stick after wheels up, so maybe most will miss this difference.

I believe there is something going on here and have raised this internally. Thanks for the report.