I have 5 tile long runway, but planes leave the ground at the end of the second. That doesn't look right. Although planes in Simutrans don't really need a longer runway, I'm pretty sure they used the entire runway before. Planes still use the entire runway when landing.
Can you post savegame? Which plane/pak is affected?
Sounds like a problem I had that the guys got sorted:
http://forum.simutrans.com/index.php?topic=8394.msg
could be a new problem ...
Sorry, forgot the basic facts: r5821, pak64 r919. Seems to affect all planes. Should be reproducible in any game. I just tested with a new map and a different plane.
Do you have an estimate since this behavior occurs?
Probably last two months, but not the last week. I don't have many airports, so it might have gone a long time without me noticing. I also haven't been playing much lately, so I haven't been up to date with trunk for most, if not all, of June.
Update:
It's from after r5776.
I aparently broke this when using kg for loads. Have to investigate.
EDIT: Just using old routines with weight divided by 1000 does not work. Hmm.
EDIT2: Did forget to extend the actual type in vehikel_besch_t -> solved.