Runway requirement variation within an aircraft type.

[qunow]

So I have tried to schedule a flight from EZE to BRE.
As the runway of BRE is only 2040m long, the TOW of my 332s are heavily restirected in term of payload.
And some 332 apparently unable to takeoff from the airport and complete the return trip at all.
In combinations I have tried, a 242t CF6-equipped 332 is able to do the return trip with 38 passenger, however a Trent-equiped 230t 332, and a CF6-equipped 233t 332 are not able to complete the trip even without any payload. They have same seating config so that shouldn't cost a different.
1. Where can I check the runway requirement of every subversion of an aircraft type?
2. Why would a version with higher MTOW have better runway performance than one with lower MTOW? supposedly higher MTOW mean higher OEW and should have less desirable runway performance unless the MTOW increase also includde engine uprate?

[Amelie090904]

I am wondering too at times. Example in my case is Miami to Aberdeen. Aberdeen has some 1800m runway or so.

767 is highly limited (max 193 pax)
A300/A310 is even more limited (155 pax)
A330 makes no sense (144 pax)

So what did I do? In the long-haul challenge I use fricking A340-500HGW on that route with normal cabin config. 5 times daily! 

Could not believe it myself, but if it works...

[JumboShrimp]

1. Where can I check the runway requirement of every subversion of an aircraft type?

Maybe a better question would be: Where can I find out how many passengers can every sub-version of the aircraft type carry?

The answer is the same as your question: Nowhere

Right now, the system will present to you the worst case scenario of each sub-fleet type (332, 333, 342, 343).

The real estate on the Open Route screen is limited, so every combination of aircraft and engine cannot really be shown.

I think an enhancement could be implemented where the system would just let the user know that some aircraft could be runway / range limited, just one line, and clicking on it could bring a pop up listing all combinations.

2. Why would a version with higher MTOW have better runway performance than one with lower MTOW? supposedly higher MTOW mean higher OEW and should have less desirable runway performance unless the MTOW increase also includde engine uprate?

I don't know the answer, but if I were to venture a guess, the higher MTOW version of the aircraft may have engines spec'd for higher thrust.