If you go to KEDW and spawn in the C-130J-30 at runway 35, overload it to the max and turn off engine 1 and 4, you will get the longest (I think) possible takoff run ever, even at 100% power!
Here’s the challenge:
You have to keep the flaps at 0% whilst on ground (you’ll bloody well need them later).
In order to lift off, you need at least 200 kts IAS, which you will only reach at the end of the 39 000 foot long runway.
It is only possible to turn and land if you set the flaps to 100% and turn back on engines 1 and 4.
Edit: You need to lift off at some point though, so don’t set 100 kts tailwind.
Pics for info:
Have fun!