Local Time |
11 |
11 |
11 |
11 |
12 |
12 |
12 |
12 |
13 |
Cdr. Donaldson's Analysis of the Flight
Data Records Presented |
MSL Alt. |
13772 | ***** | ***** | ***** | ***** | 10127 | ***** | ***** | ***** | Mimimum of 1.32 PSI overpressure causes altimeter to drop 3,645' msl in1/4 sec. |
IAS |
288 |
298 |
***** |
***** | ***** |
100 |
***** | ***** | ***** | Mimimum of 1.32 PSI overpressure causes airspeed to drop 190 knots in 1/4 sec. |
Pitch Angle |
3.6 |
***** |
***** | ***** | ***** |
8.3 |
2.2 |
***** | ***** | Nose is pushed up 4.7 degs in 1/4 sec. (~ 15 feet) by blast.
Vertical Accelerometer located aft of center of gravity records -0.89g when the tail snaps down. |
Elevator Position |
0.1 |
***** | ***** | ***** | ***** |
11.2 |
-0.2 |
***** | ***** | Yoke and rudder slammed around by shock wave. |
Mag. Heading |
82 |
***** | ***** | ***** | ***** |
163 |
276 |
***** | ***** | Analog signal is lost from mag compass components on
left wingtip. Gyro stability fails from shock wave. |
Roll Angle |
0 |
***** | ***** | ***** | ***** |
144 |
0 |
***** | ***** | Gyro flips almost in vertical to 144 degs from shock wave. |
Rudder Position |
0.72 |
0.72 |
0.72 |
***** | ***** |
77.76 | -36.54 |
0.72 |
***** | Yoke and rudder slammed around by shock wave. |
Angle of Attack |
3 |
3 |
3 |
***** | ***** |
106 |
30 |
3 |
***** | Blast wave pushes angle of attack vane (left side) from 3°
(normal) to 106°; then slip stream restores AOA vane in 1/2 sec. |
EPR |
1.30 |
1.30 |
***** | ***** | ***** |
1.14 |
***** | ***** | ***** | Engine EPRs show high pressure on face of #1 and low pressure
on #2, #3, and #4. All are from effects of shock wave. |
EPR |
1.29 |
1.29 |
***** | ***** | ***** |
2.46 |
***** | ***** | ***** | Engine EPRs show high pressure on face of #1 and low pressure
on #2, #3, and #4. All are from effects of shock wave. |
EPR |
1.30 |
1.29 |
***** | ***** | ***** |
2.36 |
***** | ***** | ***** | Engine EPRs show high pressure on face of #1 and low pressure
on #2, #3, and #4. All are from effects of shock wave. |
EPR |
1.3 |
1.29 |
***** | ***** | ***** |
2.44 |
***** | 0 |
***** | Engine EPRs show high pressure on face of #1 and low pressure
on #2, #3, and #4. All are from effects of shock wave. |
Longitudinal |
0.10 |
0.10 |
0.10 |
0.10 |
0.10 |
0.18 |
0.18 |
0.05 |
***** | ********************************************************* |
Vertical |
0.9 |
0.9 |
0.9 |
0.9 |
0.9 |
-0.89 |
-0.89 |
1.02 |
***** | Nose is pushed up 4.7 degs in 1/4 sec. (~ 15 feet) by blast.
Vertical Accelerometer located aft of center of gravity records -O.89g when the tail snaps down. |
VHF |
OFF |
OFF |
***** | ***** | ***** | KEY |
***** | ***** | ***** | Radio keys from aircrew reflex or mic button hit as by-product of shockwave. |
Pitch Trim |
3 |
***** | ***** | ***** | ***** | 4 |
***** | ***** | ***** | Elevator Trim- goes up one degree, product of blast actuating trim or pushing on tab. |
Note - The data in the column at time 20:31:12 was
lined out in the
handouts at the Baltimore hearings with the notation "End
of TWA 800 Data".