Originally Posted by George Bynum
Originally Posted by Astro14
Greenville is 7,000' long.
Official records show 5,393' but I dug into the tech specs on the plane; it can land in less than 2000'. Takeoff would be a little tighter if fully loaded.
Originally Posted by Astro14
From the speed with which the airplane left the runway - it either touched down way past the "touchdown zone*" or the spoilers weren't armed/deployed.
The airport manager was interviewed and said he saw it land out of his window; all looked normal.
I've a friend who has some right seat experience in an Eclipse and Citation. He discussed the different systems of spoiler deployment and use and WONDERS it the wrong thing was done. NON-PROFESSIONAL REPORTS say the plane sounded at full throttle as it exited the runway. Perhaps he thought the clamshell (my term, I don't know the right one) was deployed and throttle had to be advanced to brake? Perhaps something else was wrong and he didn't reach liftoff velocity for a go-around?
I understand that the aircraft was equipped with a flight data recorder. The NTSB should give us a prelim report in a week or 2, I understand.
(My interest; I live just a few miles from the runway and drive the road on which it stopped occasionally. I've friends with light singles and small twins based there with whom I've flown.)
Thank you George - I was clearly looking at the wrong airport!
At 5,393 - take everything I said and make it more emphatic. That's not long for a runway operating a jet airplane.
The NTSB will probably give us an update in a few weeks. Full report typically takes a year or so.
The 2,000 foot distance is likely the stopping distance, not the same as landing distance. All landing distance calculations for us are predicated on crossing the threshold at 50 feet, touching down at 1,000 feet down the runway, then a 15% margin on that.
I pulled up the data for Boston runway 27 last night on my way into Boston. All the assumptions are there. Wind, weight, elevation, temp, altimeter, runway slope, flap setting, brake setting.
Using those planning assumptions, and the following conditions: 8KT Headwind, 179,700 lbs weight, temp 19C, Altimeter 29.97, 18 foot landing elevation, flaps 30, with maximum braking and reverse, we could stop a 757 in 3,192 feet. But that is standing on the brakes, with full reverse.
A more normal landing, same conditions, with autobrakes 2, would be a distance of 6,245. So, yes, after careful analysis of conditions and performance, I would've accepted runway 27 if that's what ATC requested.
But I don't know if these pilots performed that kind of analysis...I do...every time...
Tailwind doesn't help...neither does rain...