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Search: Posts Made By: Owain Glyndwr
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Forum: Tech Log
10th Oct 2013, 08:20
Replies: 393
Views: 76,858
Posted By Owain Glyndwr

roulis I’m really not sure what...

roulis


I’m really not sure what point you are trying to make here. If it is a plea for a mathematical definition of acceptable dutch roll characteristics then such things already exist...
Forum: Tech Log
9th Oct 2013, 11:04
Replies: 393
Views: 76,858
Posted By Owain Glyndwr

roulis Pas d'accord! Well not entirely...

roulis

Pas d'accord! Well not entirely d'accord anyway.

My gripe is that the pilot giving a second oscillation is actually the problem since it is the pilot actions that in this case start off...
Forum: Tech Log
8th Oct 2013, 06:42
Replies: 393
Views: 76,858
Posted By Owain Glyndwr

Chris, If you are still wondering about...

Chris,

If you are still wondering about ignore lists you might like to consider extracts from a couple of posts:
Forum: Tech Log
7th Oct 2013, 17:18
Replies: 393
Views: 76,858
Posted By Owain Glyndwr

roulis But they routinely do so in the...

roulis

But they routinely do so in the flight test development programmes to ensure that there are no problems and to sort them out if necessary. Before any aircraft gets certification its...
Forum: Tech Log
7th Oct 2013, 13:02
Replies: 393
Views: 76,858
Posted By Owain Glyndwr

Brian IIRC it was to add a bit of fin area...

Brian

IIRC it was to add a bit of fin area (ventral fin?) Mystery of the Yaw Damper thread again I think refers
Forum: Tech Log
7th Oct 2013, 11:27
Replies: 393
Views: 76,858
Posted By Owain Glyndwr

Thanks for correcting my posting Chris - one...

Thanks for correcting my posting Chris - one loses track of who said what & where!


Short answer: Davies doesn't mention structural capability so far as I can see. Boeing paper on use of rudder...
Forum: Tech Log
7th Oct 2013, 08:02
Replies: 393
Views: 76,858
Posted By Owain Glyndwr

Hi roulis Whilst I hold to that I got from...

Hi roulis

Whilst I hold to that I got from my professor and all the reports I read on the subject as a young man!

Look roulis, this is mainly semantics and I don't wish to prolong the debate. I...
Forum: Tech Log
4th Oct 2013, 08:17
Replies: 393
Views: 76,858
Posted By Owain Glyndwr

roulis Dutch roll is certainly an...

roulis



Dutch roll is certainly an oscillation, but it doesn't have to be one of increasing bank; in fact it would be a lousy aircraft for which that were true - very probably unflyable....
Forum: Tech Log
4th Oct 2013, 08:00
Replies: 393
Views: 76,858
Posted By Owain Glyndwr

bubbers One has to admire your tenacity in...

bubbers

One has to admire your tenacity in defending your colleagues, but I fear you are now clutching at straws. As has been said several times both pedal position and rudder deflection were...
Forum: Tech Log
3rd Oct 2013, 13:47
Replies: 393
Views: 76,858
Posted By Owain Glyndwr

bubbers44 Thank you for posting that report,...

bubbers44

Thank you for posting that report, but since it says several times that re-engaging the yaw dampers made things slightly easier, and since the problem was diagnosed as a failed autopilot...
Forum: Tech Log
3rd Oct 2013, 13:40
Replies: 393
Views: 76,858
Posted By Owain Glyndwr

HN39 The limit load (assuming the aircraft...

HN39

The limit load (assuming the aircraft is designed by manoeuvre loads not by gust loads) would be 2.5g at MTOW and fwd CG limit. Strictly speaking that should be at MTOW less whatever fuel you...
Forum: Tech Log
2nd Oct 2013, 06:54
Replies: 393
Views: 76,858
Posted By Owain Glyndwr

misd-again Didn't you mean finger...

misd-again



Didn't you mean finger paints?
Forum: Tech Log
1st Oct 2013, 16:24
Replies: 393
Views: 76,858
Posted By Owain Glyndwr

@AirRabbit If you go back to the OP you will...

@AirRabbit

If you go back to the OP you will find it querying I take this to mean the changes FAA made to their regulations as a result of NTSB pointing out the confusion that existed between Va...
Forum: Tech Log
1st Oct 2013, 15:29
Replies: 393
Views: 76,858
Posted By Owain Glyndwr

Agreed HN, but that refers to the design...

Agreed HN, but that refers to the design manoeuvre speed. The FAA changes made following the NTSB AA587 recommendation related to FAR 25.1507 and 25.1583
Forum: Tech Log
1st Oct 2013, 14:34
Replies: 393
Views: 76,858
Posted By Owain Glyndwr

@Chris, Roulis I think you will find what...

@Chris, Roulis

I think you will find what you are looking for in posts #21 and 23 of the "Va Maneuvring" thread.

This involves subtle distinctions between "Maneuvring speed" and "Design...
Forum: Tech Log
30th Sep 2013, 11:45
Replies: 393
Views: 76,858
Posted By Owain Glyndwr

Chris, I really don't know much about the...

Chris,

I really don't know much about the details of B52 design. I am going from this extract taken from the B52 history site:

That suggests to me that they may have retained roll and pitch...
Forum: Tech Log
29th Sep 2013, 17:44
Replies: 393
Views: 76,858
Posted By Owain Glyndwr

@pattern I'm not sure about this but I...

@pattern

I'm not sure about this but I believe that the B52 didn't have any hydraulics in the vertical stabiliser - I'm sure someone here will correct me if I am wrong there.
When AA587 lost its...
Forum: Tech Log
29th Sep 2013, 07:50
Replies: 393
Views: 76,858
Posted By Owain Glyndwr

Teledor(lessthan)serious Have you even read...

Teledor(lessthan)serious

Have you even read the Boeing contributions on this problem? you can find them here:http://www.ifalpa.org/downloads/Leve...20aircraft.pdf...
Forum: Tech Log
28th Sep 2013, 06:58
Replies: 393
Views: 76,858
Posted By Owain Glyndwr

An interesting discussion, if only to demonstrate...

An interesting discussion, if only to demonstrate the longevity of misinformation circulating on the 'net ;)

AirRabbit

Well said :)

bubbers44

If you read the NTSB report and the...
Showing results 1 to 19 of 19


 
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