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Search: Posts Made By: zzuf
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14th Apr 2021, 11:04
Replies: 14
Views: 9,013
Posted By zzuf

Jonesygirl, there are a few who lurk here who...

Jonesygirl, there are a few who lurk here who remember you from RAAF Pearce, also I spent many fun hours staff flying with Lee. Formation aerobatics, 1 v 1 fighter tactics in Vampires and Macchis. ...
13th Apr 2021, 11:28
Replies: 5
Views: 487
Posted By zzuf

kshsim, are you expecting bank angle hold in ALTN...

kshsim, are you expecting bank angle hold in ALTN LAW? If it is rolling, use some rudder trim to induce enough sideslip to counter the residual rolling moment. Not elegant but there is no pilot...
Forum: Tech Log
17th Jan 2021, 01:09
Replies: 115
Views: 17,088
Posted By zzuf

Gums, F102, I think I have your pic!! High over...

Gums, F102, I think I have your pic!! High over Thailand 6Jul1964, probably 100 miles or so north of Korat.
Courtesy RAAF Avon Sabre and A4 radar gunsight. Concede a gun splash??? Ha Ha good old...
Forum: Tech Log
16th Jan 2021, 10:27
Replies: 115
Views: 17,088
Posted By zzuf

Gums I enjoy your posts and as FlightDetent says...

Gums I enjoy your posts and as FlightDetent says this is probably not the place for flight control discussions except for MACS but....
1. A320 has spring feel for artificial feel as in F86 without...
Forum: Night Stop
22nd Dec 2020, 08:10
Replies: 14
Views: 1,991
Posted By zzuf

Rembrandt Square - Night Watch 3D sculpture. Go...

Rembrandt Square - Night Watch 3D sculpture. Go in the evening by tram and people watch over beer at one of the sidewalk bars. Van Gogh Museum. Ride the trams from one end of Amsterdam to the...
11th Sep 2020, 05:37
Replies: 49
Views: 7,448
Posted By zzuf

Mmmm.... Va is a design speed, it does not vary...

Mmmm....
Va is a design speed, it does not vary with weight. The only time Va has any relationship to stalling in FAR 23 is if Va is chosen to be Va min.
I am aware of many aircraft manuals giving...
4th Jul 2019, 08:42
Replies: 4,656
Views: 4,396,731
Posted By zzuf

Must say have suspicion about Yoko1 after a brief...

Must say have suspicion about Yoko1 after a brief exchange.
Posts 630, 632, and 657.
He was quoting the static stability requirements of FAR25 in some detail, after stating that there are two types...
26th Jun 2019, 07:10
Replies: 4,656
Views: 4,396,731
Posted By zzuf

Great post!

Great post!
26th Jun 2019, 01:11
Replies: 4,656
Views: 4,396,731
Posted By zzuf

No, your answer was perfect, you don't quite...

No, your answer was perfect, you don't quite understand manoeuvre stability and how it may differ from longitudinal static stability.
But, I am at a total loss at how a situation where an aircraft...
25th Jun 2019, 13:10
Replies: 4,656
Views: 4,396,731
Posted By zzuf

How do you know that it is not related to...

How do you know that it is not related to manoeuvre stability?
After all MCAS = Manoeuvre Characteristics Augmentation system.
16th Jun 2019, 04:05
Replies: 4,656
Views: 4,396,731
Posted By zzuf

Megan, many years ago after the loss, overseas,...

Megan, many years ago after the loss, overseas, of a couple of T tailed aircraft in deep stall accidents OZ DCA sent a team overseas to examine the stall requirements then applied to transport...
15th Jun 2019, 06:25
Replies: 4,656
Views: 4,396,731
Posted By zzuf

1. Once again, FAR 25.255 is about pilot applied...

1. Once again, FAR 25.255 is about pilot applied mis-trim, it is a stand alone regulation that has nothing to do with system runaways. Do you have any evidence that FAR 25.255 is not effective for...
14th Jun 2019, 09:13
Replies: 4,656
Views: 4,396,731
Posted By zzuf

FDR you have totally misinterpreted the reason...

FDR you have totally misinterpreted the reason for the requirement contained in FAR25.255.
This standard was developed to address the "jet upset" problems experienced in the early days of jet...
12th Apr 2019, 10:42
Replies: 27
Views: 9,301
Posted By zzuf

Thanks Djpil, almost forgotten Appendix A. The...

Thanks Djpil, almost forgotten Appendix A.
The concern for me is that, in Australia, both CASA and ATSB, after many years, still promote this potentially dangerous misunderstanding.
ATSB...
12th Apr 2019, 05:38
Replies: 27
Views: 9,301
Posted By zzuf

have always thought of Va as the speed where if...

have always thought of Va as the speed where if you applied full control deflection, the surface would stall before it could provide enough force to exceed the max load factor of the aircraft meaning...
10th Apr 2019, 01:33
Replies: 27
Views: 9,301
Posted By zzuf

Once again ATSB investigators have shown their...

Once again ATSB investigators have shown their total misunderstanding of what Va is and what it isn't.
The claims in this report could be totally misleading to less experienced pilots.
Below is a...
9th Apr 2019, 10:14
Replies: 47
Views: 9,054
Posted By zzuf

I recall working with DL while he was a...

I recall working with DL while he was a departmental officer and during his later involvement as project engineer/TP with many of the aircraft I flew.
He made pretty nice violins as well.
But I...
8th Apr 2019, 12:08
Replies: 5,120
Views: 10,607,158
Posted By zzuf

Now why would a manufacturer limit the thumb...

Now why would a manufacturer limit the thumb switch trim range to even less than the autopilot trim authority, particularly when it could no longer be shown to trim throughtout the required envelope?...
5th Apr 2019, 11:51
Replies: 5,120
Views: 10,607,158
Posted By zzuf

My take would be that the aircraft could not...

My take would be that the aircraft could not comply with the 3 second trim operation, no load, required for electric trims for (CS 25.255(a)(1)).
So they declared that the manual trim wheel was the...
3rd Apr 2019, 09:45
Replies: 30
Views: 4,885
Posted By zzuf

Yes, welcome to the new certification world. It...

Yes, welcome to the new certification world.
It appears to be a lot that is not included in CFR part 23, I think it would be a mistake to think that compliance will now be easier, or that the...
3rd Apr 2019, 07:07
Replies: 30
Views: 4,885
Posted By zzuf

Either yes or no, depending on how compliance...

Either yes or no, depending on how compliance with FAR 23.701 is achieved.
https://www.risingup.com/fars/info/part23-701-FAR.shtml
24th Mar 2019, 12:10
Replies: 5,120
Views: 10,607,158
Posted By zzuf

For those keen on quoting the longitudinal static...

For those keen on quoting the longitudinal static stability requirements of FAR 25.175, Should note that the device in question is MCAS, ie manoeuvre, not static.
It is clear from the early...
Forum: Tech Log
23rd Mar 2019, 10:45
Replies: 20
Views: 4,139
Posted By zzuf

Not as heavily "grandfathered" as some seem to...

Not as heavily "grandfathered" as some seem to believe.
The changes in certification basis, and FAR25 amendment status for compliance of most 737 models is here:...
Forum: Tech Log
26th Feb 2019, 11:03
Replies: 44
Views: 16,390
Posted By zzuf

The requirement for a fuel jettison system...

The requirement for a fuel jettison system depends on climb performance at MTOW not the MTOW MLW Delta. FAR 25.1001
5th Dec 2018, 11:47
Replies: 2,099
Views: 1,238,326
Posted By zzuf

This is why I suspect the stall in question was...

This is why I suspect the stall in question was the power on, turning flight at 3kts per second deceleration rate. It is a very aggressive manoeuvre for a jet transport, requiring a high pitch...
Showing results 1 to 25 of 167
 


 
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