Luftwaffe
Actually, i'm not surprised that you can't find thiat info to even get a basic answer to your question you have to go the the performance data (which even on the smallest GA aircraft presents a blinding array of charts and graphs)
Can a ATR42-500 take off and land at an airfield with a 800m runway? Operating conditions: ISA+25, 340NM (170+170), average pax. weight 75kg +10kg baggage per pax.
however this can be approached in several ways
1. "340NM (170+170)"
(JAR 25??) Payload/range for a 0.6x M cruise
these charts may list the assumed number of pax?
2. "ATR42-500 take off and land at an airfield with a 800m runway? Operating conditions: ISA+25".
JAR 25 take off rwy length standard day + 25, may assume ZER0 wind and ZER0 rwy gradient..ditto JAR Landing RWY required.
Obstacles are another thing
Boeing provides basic wat curves on its site but you have to look carefully to get to them perhaps ATR does the same...I can't be any more helpful somebody will tell you here...rhov