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Search: Posts Made By: FE Hoppy
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Forum: Tech Log
15th Jun 2011, 10:41
Replies: 2,070
Views: 613,641
Posted By FE Hoppy

They had some pitch authority but didn't use it...

They had some pitch authority but didn't use it until very late and it's not stated for how long.
Forum: Tech Log
9th Jun 2011, 16:11
Replies: 2,070
Views: 613,641
Posted By FE Hoppy

@PJ2 You forgot the first rule of Pprune: ...

@PJ2

You forgot the first rule of Pprune:

Never blame the pilot. :=
Forum: Tech Log
3rd Jun 2011, 16:51
Replies: 2,070
Views: 613,641
Posted By FE Hoppy

Litebulbs: 2:10:05 FL350 "sharp fall from...

Litebulbs:

2:10:05 FL350 "sharp fall from 275 kt" 275 at FL350 @ 465TAS
FL375 "speed increased sharply to 215 kt" 215 at FL375 @ 375TAS
2:11:06 ? "15 seconds later" isis 185 kt FL380 @325TAS
...
Forum: Tech Log
3rd Jun 2011, 15:57
Replies: 2,070
Views: 613,641
Posted By FE Hoppy

Using the back of a fag packet (are we still...

Using the back of a fag packet (are we still allowed to do that?) TAS at FL380 for IAS 185 would be about 325kts. I don't know what the wind was so add or subtract as required.
Forum: Tech Log
3rd Jun 2011, 14:43
Replies: 2,070
Views: 613,641
Posted By FE Hoppy

Well the pitch input was at 05 and the climb...

Well the pitch input was at 05 and the climb commenced at 16. The peak value was 7000fpm but the mean was about 1400fpm. If we are to believe the the quoted speeds they lost 60kts in this manoeuvre...
Forum: Tech Log
3rd Jun 2011, 14:06
Replies: 2,070
Views: 613,641
Posted By FE Hoppy

Tailspin Turtle wrote: Not really? ...

Tailspin Turtle wrote:


Not really?

CoG could be some way behind the "centre of lift". In this case the CoG was at 29% MAC. The "centre of lift" would generally be at 25%.
Forum: Tech Log
3rd Jun 2011, 13:41
Replies: 2,070
Views: 613,641
Posted By FE Hoppy

Welsh Wingman: Flugunfall 01 DEC 1974 einer...

Welsh Wingman:
Flugunfall 01 DEC 1974 einer Boeing 727-251 N274US - Stony Point, NY (http://aviation-safety.net/database/record.php?id=19741201-1&lang=de)

Litebulbs:
Not sure what you're asking?...
Forum: Tech Log
3rd Jun 2011, 12:08
Replies: 2,070
Views: 613,641
Posted By FE Hoppy

Litebulbs: I think your quote was a...

Litebulbs:


I think your quote was a little selective. This puts a different slant on it:


The climb comes after the first nose up input and rate reduces after the nose down input.

I'm not...
Forum: Tech Log
3rd Jun 2011, 11:37
Replies: 2,070
Views: 613,641
Posted By FE Hoppy

Litebulbs: We know where he started, we...

Litebulbs:


We know where he started, we know his mass, we know that there is no increase in thrust reported and we know where he ended. So unless there was a large input of energy from an...
Forum: Tech Log
3rd Jun 2011, 11:34
Replies: 2,070
Views: 613,641
Posted By FE Hoppy

Hi Rudder Rudder Rat (I remember it well!) ...

Hi Rudder Rudder Rat (I remember it well!)



I can't help thinking that to pitch up from cruise attitude to "beyond 10°" without increasing thrust would take more than a "light" back pressure.
Forum: Tech Log
3rd Jun 2011, 10:52
Replies: 2,070
Views: 613,641
Posted By FE Hoppy

RudderRudderRat: BEA: and ...

RudderRudderRat:


BEA:


and


not sure where "light back pressure" comes from?
Forum: Tech Log
2nd Jun 2011, 11:05
Replies: 2,070
Views: 613,641
Posted By FE Hoppy

HN39

Having experienced both as FE on test/acceptance flights on the Nimrod and L1011 I can say from my experience the buffet itself wasn't much different and had we not been aware of which regime we were...
Forum: Tech Log
31st May 2011, 07:45
Replies: 2,070
Views: 613,641
Posted By FE Hoppy

Embraer (Honeywell EPIC) uses both and the...

Embraer (Honeywell EPIC) uses both and the procedure is to ignore the FPA with unreliable airspeed.



HUD just repeating what's available downstairs in the cruise so doesn't offer any...
Forum: Tech Log
30th May 2011, 20:30
Replies: 2,070
Views: 613,641
Posted By FE Hoppy

The THS movement was in response to the sustained...

The THS movement was in response to the sustained nose up input as described here:
Forum: Tech Log
30th May 2011, 20:07
Replies: 2,070
Views: 613,641
Posted By FE Hoppy

This note from the report links the vane angle...

This note from the report links the vane angle signals to the validity of the airspeed.

Later when the nose is lowered and airspeed increases back to above 60kts the stall warning sounds again....
Forum: Tech Log
30th May 2011, 19:10
Replies: 2,070
Views: 613,641
Posted By FE Hoppy

Wouldn't a "left nose up" command without any...

Wouldn't a "left nose up" command without any change in thrust cause airspeed to decrease?
For a stall warning to sound wouldn't the airspeed signal still need to be valid?
If with no increase in...
Forum: Tech Log
30th May 2011, 18:32
Replies: 2,070
Views: 613,641
Posted By FE Hoppy

@Dozy I'm not sure how you know that they...

@Dozy


I'm not sure how you know that they found all airspeed information gone. There is no indication in the report that the airspeed information was false at any point. Only that for a minute...
Forum: Tech Log
27th May 2011, 17:17
Replies: 2,070
Views: 613,641
Posted By FE Hoppy

I prefer not to guess how other aircraft systems...

I prefer not to guess how other aircraft systems work, hence the question.

From this we can deduce that the THS movement was in response to the pilots input and not a cause of the initial climb or...
Forum: Tech Log
27th May 2011, 16:19
Replies: 2,070
Views: 613,641
Posted By FE Hoppy

A question for the AB pilots: Is there an...

A question for the AB pilots:

Is there an elevator offload to the stab? By this I mean does the aircraft auto trim in the direction of input to centralise the elevator? and would a prolonged nose...
Forum: Tech Log
27th May 2011, 15:41
Replies: 2,070
Views: 613,641
Posted By FE Hoppy

No indication that the airspeed on the PFD was...

No indication that the airspeed on the PFD was inaccurate. Just that after it went out of range, the PFD came back about a minute before the standby. They were close to max cruise alt, got a stall...
Showing results 1 to 20 of 20


 
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