Originally Posted by
B2N2
Your V1 is essentially out the door.
Given the additional length you could still safely reject above the calculated V1, you just don’t know by how much.
So right after your calculated V1 you have a catastrophic failure for which you could have rejected had you requested new performance calculation.
Now you’re forced to take a sick puppy airborne.
Which is well and good in the sim but in the real world with a low overcast and a crosswind and 100 people screaming in the back it’s different
I’m not a performance engineer, but I so believe we all do takeoffs such as this every single day.
Let’s assume you are doing a ferry flight will full thrust off a very long runway. Your calculated V1(min) and Vr are 120kts, but you could safely stop with V1(max) 180kts. Are you going to use V1max, just in case something catastrophic happens?
Unless there is a 10000ft mountain dead ahead, I’m assuming the answer will be no.