"Also it shouldnt be possible to lower flaps at more than, say 300kph." At some speed it should probably rip the flaps/wing off but none of that damage modelling or weight changes (weapons firing) is modeled in ARMA it seems which to me is not surprising. Infantry game...
I decided to look into it more so I talked less in generalities.
Stall speeds from the Albatross data sheet though there may be variants...
Clean: 195 kmh
1 Stage: 176 kmh
2 Stage: 165 kmh
These should be at max takeoff weight.
Doing a test flight I get these numbers:
Clean: 155 kmh
1 Stage: 155 kmh
2 Stage: 162 kmh
I'm using a mouse so it was a bit hard to get completely accurate numbers but I pretty confident that there is something amiss.
I did like how squirly it was near stall. A lot like my plane. I would like a good snap roll on stall but not even flight sims manage that well :-(
As for should it able to take off on full flaps. Depends on whether the engine can overcome the high induced drag AND ground friction long enough to get airborne. I can't find anything that says anything about it.
As to automatic flap reduction. Some modern jets have them but this isn't a modern jet. It is a cheap ancient thing used by underfunded factions!
As to "higher angles should reduce ground/air speeds not increase them". Absolutely true in flight. Bit of a warning sign that one :-)