Annex A
Extract from fax from AAIB to Air Safety
Investigation Manager, Boeing Helicopters
I apologise for the delay of the information
required for the simulation, occasioned by AAIB bureaucracy; it
is as follows:
| All up Weight | 17,100 kg
|
| Centre of Gravity | Mid Point of Allowable Range
|
| Mean Sea Level Ambient Pressure | 998 mb
|
| Sea Level Ambient Temperature | +9ºC
|
| Sea Level Dew Point Temperature | +9ºC
|
| Initial Impact Point Altitude | 800 ft amsl
|
| Estimated Wind near Initial Impact Point |
170ºT/30 kt (considerable uncertainty) |
| Track at Initial Impact | 025ºT
|
| Estimated Pitch Attitude at Initial Impact |
30º Nose Up |
| Estimated Flight Path at Initial Impact |
20º above the horizontal |
| Assumed point of DASH and LCTA |
|
| Power Supply Loss | At Initial Impact
|
While the estimated pitch attitude and flight path are given
above, this is not intended to alter the proposed "steady
attitude" conditions, ie 20, 30 and 40º pitch, or to
stop the data at 20º climb. The Board considers that the
information to be provided by the simulator runs proposed by John
Kannon are likely to be of considerable value to the investigation.
They have requested a number of initial conditions for the proposed
series of runs:
| Indicated Airspeed | 135 and 150 KIAS
|
| Rate of Climb | 0, 500 and 1000 ft/min
|
It is appreciated that this may impose a factor of six on
the number of runs, but hopefully indications from initial runs
will preclude a sizeable number of combinations of initial conditions
and make the number of cases to be handled manageable.
A N Cable
Senior Inspector of Air Accidents, for Chief Inspector of Air
Accidents
15 August 1994
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