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Search: Posts Made By: Mr Optimistic
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Forum: Tech Log
8th Jul 2011, 19:11
Replies: 1,069
Views: 281,708
Posted By Mr Optimistic

If -hypothetically - the altimeter showed a...

If -hypothetically - the altimeter showed a declining altitude when they were level in the cruise, I suppose that could have caused a NU command ? No reason to think it happened but .... Could icing...
Forum: Tech Log
8th Jul 2011, 18:01
Replies: 1,069
Views: 281,708
Posted By Mr Optimistic

Or they could see their (true) attitude and...

Or they could see their (true) attitude and interpreted the situation in such a way as to render nose up the best option. How about they had lost all faith in their plane and were of the opinion...
Forum: Tech Log
8th Jul 2011, 14:50
Replies: 1,069
Views: 281,708
Posted By Mr Optimistic

Thanks. AOA (>30 degrees, < -10 degrees)...

Thanks.


AOA (>30 degrees, < -10 degrees)
Speed (>440 kt, < 60 kt)
If the stall warner sounded then speed must have been >60kt or would have inhibited warner, and AoA threshold much less than...
Forum: Tech Log
8th Jul 2011, 12:00
Replies: 1,069
Views: 281,708
Posted By Mr Optimistic

A33Zab, presume those conditions for abnormal law...

A33Zab, presume those conditions for abnormal law are all 'or's'. However, if the a/c already knew that speed was less than necessary for valid AoA would the logic still take the value and change law...
Forum: Tech Log
7th Jul 2011, 22:41
Replies: 1,069
Views: 281,708
Posted By Mr Optimistic

What factors do the designers consider when...

What factors do the designers consider when setting out how far the THS can travel ? Would it have mattered much in real life if it had been limited to less than 8 degrees NU ?
Forum: Tech Log
6th Jul 2011, 22:48
Replies: 1,069
Views: 281,708
Posted By Mr Optimistic

A33Zab, thanks.

A33Zab, thanks.
Forum: Tech Log
6th Jul 2011, 22:13
Replies: 1,069
Views: 281,708
Posted By Mr Optimistic

HN39, be warned I am an ex-physicist so admire...

HN39, be warned I am an ex-physicist so admire the precision but be wary of the decimal point and I also admit they were wine and excel affected.

Edit^2: see your point, who uses feet per minute ?...
Forum: Tech Log
6th Jul 2011, 21:11
Replies: 1,069
Views: 281,708
Posted By Mr Optimistic

The only things I feel I believe for sure out of...

The only things I feel I believe for sure out of all this are that not latching the stall warning is a clear design oversight and that trimming to near the maximum authority deserves a big red light...
Forum: Tech Log
6th Jul 2011, 20:33
Replies: 1,069
Views: 281,708
Posted By Mr Optimistic

A33Zab, pls be a little patient with this SLF but...

A33Zab, pls be a little patient with this SLF but where is the evidence for a sustained ND input ? The whole discussion about the relative authority of the elevators v THS seemed to be along the...
Forum: Tech Log
6th Jul 2011, 19:33
Replies: 1,069
Views: 281,708
Posted By Mr Optimistic

Re forces, yep once at terminal velocity for the...

Re forces, yep once at terminal velocity for the attitude there is no vertical acceleration, in other words the forces up and down match so drag/lift component vertically = 1g. Gravity is pulling...
Forum: Tech Log
6th Jul 2011, 12:53
Replies: 1,069
Views: 281,708
Posted By Mr Optimistic

Roll control was maintained which indicates...

Roll control was maintained which indicates attitude data OK.
Forum: Tech Log
5th Jul 2011, 19:42
Replies: 1,069
Views: 281,708
Posted By Mr Optimistic

'if HAL was reacting to the overspeed warning and...

'if HAL was reacting to the overspeed warning and the reversion to control law "x"'

From the report.......(edited down)

At 2 h 10 min 51 , the stall warning was triggered again. The thrust...
Forum: Tech Log
4th Jul 2011, 22:59
Replies: 1,069
Views: 281,708
Posted By Mr Optimistic

Didn't they have everything they needed; reliable...

Didn't they have everything they needed; reliable attitude, altimeter and engine settings - why would any more help ? The problem may have been the knowledge that it is a complex system and therefore...
Forum: Tech Log
4th Jul 2011, 22:00
Replies: 1,069
Views: 281,708
Posted By Mr Optimistic

HN39, thanks. So in a known UAS condition the...

HN39, thanks. So in a known UAS condition the system took what it knew to be unreliable airspeed data to inhibit the warning ?
Forum: Tech Log
4th Jul 2011, 19:37
Replies: 1,069
Views: 281,708
Posted By Mr Optimistic

HN39, OK but eventually the AoA went well over...

HN39, OK but eventually the AoA went well over and the aircraft stalled. It is inconceivable that somehow the fwd speed got to 60knots unstalled, so at some stage it should have been continuous...
Forum: Tech Log
4th Jul 2011, 18:35
Replies: 1,069
Views: 281,708
Posted By Mr Optimistic

'The stall warning sounded twice in a row. The...

'The stall warning sounded twice in a row. The recorded parameters show a sharp fall from about 275 kt to 60 kt in the speed displayed on the left primary flight display (PFD)'

What does 'twice in...
Forum: Tech Log
3rd Jul 2011, 21:48
Replies: 1,069
Views: 281,708
Posted By Mr Optimistic

As a non-pilot, my feeling is that this is more...

As a non-pilot, my feeling is that this is more about the effective presentation of information to people under stress and psychology than about software or the absence of aoa readouts.
Forum: Tech Log
2nd Jul 2011, 15:11
Replies: 1,069
Views: 281,708
Posted By Mr Optimistic

That navigator wouldn't have got there in the...

That navigator wouldn't have got there in the first place so no harm done.
Forum: Tech Log
2nd Jul 2011, 11:11
Replies: 1,069
Views: 281,708
Posted By Mr Optimistic

Thanks to all.

Thanks to all.
Forum: Tech Log
1st Jul 2011, 21:54
Replies: 1,069
Views: 281,708
Posted By Mr Optimistic

Is there any evidence or reason to suspect that...

Is there any evidence or reason to suspect that the a/c is difficult to hand fly ? If the initial climb was caused by such difficulties well OK but there is no evidence for that is there, the...
Forum: Tech Log
16th Jun 2011, 21:54
Replies: 1,069
Views: 281,708
Posted By Mr Optimistic

But didn't the speeds become valid again,...

But didn't the speeds become valid again, implying the nose came down as commanded ? Then renewed stall warning and maybe an instictive undoing of the last input as it 'caused' the warning ? I know...
Forum: Tech Log
16th Jun 2011, 21:32
Replies: 1,069
Views: 281,708
Posted By Mr Optimistic

We will soon be at FL100. Where was the...

We will soon be at FL100. Where was the desperation ?
Forum: Tech Log
16th Jun 2011, 20:51
Replies: 1,069
Views: 281,708
Posted By Mr Optimistic

Until it is shown that the pilots knew they were...

Until it is shown that the pilots knew they were in a stall, the limitations of the aircraft to generate the appropriate moments are irrelevant surely ? If they applied the appropriate inputs but...
Showing results 1 to 23 of 23


 
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