Lets look at the no flap/slat scenario.
The given TOW is 64.263 kg. Lets assume they were
planning a F15 takeoff.
- The clean acf will stall at 166 kts
- A slat only will stall at 131 kts
- A slat/F15 acf will stall at 123 kts.
So obviously, the slats are the main contributers of lift on the MD80
in takeoff config. No slat will set you back 35 kts, no flap
will set you back only 8 kts.
Assuming they had
slat but no flap, they would be 11 kts ABOVE
stall speed at Vr, so I think we can rule out this scenario since
the acf would most likely be flyable.
Assuming they were
clean and went for F15 takeoff speeds,
at rotate Vr, they would have been 24 kts below stall speed, at V2
they would be 17 kts BELOW stall speed.
So the million $ questions are
1. Were the SLATS exended?
2. Would a clean MD80 be able to accelerate from Vr 142
to Vclean/stall 166 at a high AoA possibly scraping the tail
in a distance of about 500m?
XPM
