zlacker

>>jnsaff+(OP)
This is probably the worst way a plane could go down in terms of damage caused. Maximum effect in term of damage. Cargo plane apparently reached V1 (go/no go speed) on the runway, and suffered a catastrophic engine failure. They passed V1, so they knew they were going down. Engine was shedding large debris, including the housing (!!!) which is a shrapnel shield.

They were on fire just as they reached V1.

Plane was fully loaded with 38,000 LB of fuel for 12 hour flight to hawaii. Worst case scenario.

Pilots did the heroic thing - they tried to take off instead at 160 MPH to minimize collateral damage (highway and warehouses at the end of the runway) and crash and die somewhere else, instead of go beyond the runway at that speed. Accelerating a fully loaded jet plane at ground level beyond the runway has obvious consequences. They had one choice.

Instead, they clipped the UPS factory because they were so low, they tried to clear it but did not. Plane then hit the ground port wing down, shearing it off entirely, smearing a fireball of jet fuel across half a mile (not an exaggeration) before the plane flipped. Crew were likely dead by before this, footage shows the cockpit being slammed into the ground like a mousetrap by the flip once the port wing was gone and gravity took the starboard wing over.

Physics took over. Plane flipped and rolled upon loss of port wing, smearing a rolling fireball of the remaining fuel load from the starboard wing for another half a mile.

Louisville is now a firestorm as a result.

Respect to the flight crew; rest in peace, they made the best they could out of a really shitty scenario. They flew it all the way down.

Footage:

https://x.com/osinttechnical/status/1985845987684855969?s=46

https://x.com/faytuksnetwork/status/1985849267152699741?s=46

https://x.com/faytuksnetwork/status/1985848132500885995?s=46

https://x.com/faytuksnetwork/status/1985843126934614297?s=46

>>octaan+en
Sorry for ignorance but why is the right thing to continue to take off with an engine on fire?

>>chzblc+Bp
V1 is the speed at which you can still stop the plane before the end of the runway. (It is computed for each takeoff based on runway length, aircraft mass, takeoff engine power setting, flaps, wind, runway condition, etc.)

When the plane reaches V1, pilots take the hand off the throttle: they're committed to takeoff, even if an engine fails. It is better to take off and fix the problem or land again, than to smash into whatever is beyond the end of the runway.

>>FabHK+Zu
Isn't there any margin? Does it calculate stopping before end of runway or before causing damage?

Surely uncertainty about the situation contributes to defaulting to committing, but what if it's a passenger plane and at V1 pilots know they've lost power? Wouldn't veering into highway at 30 mph be weighted against certain, big loss of life?

Edit: I now see that this has been partially answered by uncle comment

>>panxyh+ey
V1 is the decision speed with respect to a single engine failure in a multi-engine aircraft. It's the speed below rotation speed at which the decision to abort safely can no longer be made.

Captains can make the decision to abort the takeoff in the case of absolute power loss or for 'failure to fly' (where the aircraft is clearly not going to fly, e.g. the elevator/pitch controls aren't responding). But the training is adamant: if you're uncertain what has happened after V1 you try to fly the plane away from the runway.

>>hugh-a+Pj1
> abort safely

That's what I'm getting at. I want to abort unsafely. Imagine 400 meters of grass field after the end of the runway, and a water body. I'm asking wether such factors are accounted for, or if plane on ground beyond runway does-not-compute.

>>panxyh+lr1
You should never plan to use your safety margin!

That "extra" 400m of grass? That's for all the other things that can still go wrong even when you follow procedure. e.g., you're below V1 so you abort takeoff, close throttles and hit the brakes. You should be able to safely stop on the runway.

But now your brakes fail because maybe the reason you had to abort was a fire that also managed to burn through your brake lines, or it started to rain just as you were taking off, or...

Now that's where the 400m of safety margin comes in to save your ass (hopefully). It's "extra", you don't plan on using it.