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Search: Posts Made By: gums
Showing results 1 to 35 of 44
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Forum: Tech Log
7th Mar 2013, 22:58
Replies: 1,064
Views: 186,595
Posted By gums

Hey, Lyman! OG, Nuts, PJ and Cland are onto...

Hey, Lyman!

OG, Nuts, PJ and Cland are onto something.

1) Although phugoid mode exists for normal planes, the FBW systems negate it. They are contantly attempting to maintain an attitude or...
Forum: Tech Log
6th Mar 2013, 18:11
Replies: 1,064
Views: 186,595
Posted By gums

Before returning to the peanut gallery amongst...

Before returning to the peanut gallery amongst this august group of heavy pilots, I shall once again challenge Cland.......

From A330 FCOM:



http://sluf.org/misc_pages/buspitch.JPG

So the...
Forum: Tech Log
5th Mar 2013, 22:24
Replies: 1,064
Views: 186,595
Posted By gums

TNX Chris and PJ for getting me back to Earth. ...

TNX Chris and PJ for getting me back to Earth.

I realize that we had the AoA discussion way back before I started to comment, but I had read the threads with only one comment until after we saw...
Forum: Tech Log
4th Mar 2013, 21:38
Replies: 1,064
Views: 186,595
Posted By gums

Hail, hail the gangs all here! DOZE!!! I...

Hail, hail the gangs all here!

DOZE!!! I still don't think you understand my point about the insidious effect of the 'bus autotrim WRT the gee command and pitch attitude.



Gotta tellya,...
Forum: Tech Log
4th Mar 2013, 17:49
Replies: 1,064
Views: 186,595
Posted By gums

Salute! TNX, Doze for confirming my...

Salute!

TNX, Doze for confirming my understanding of the THS.

However, the big point I have trying to make for 2 years is that the flight control laws for the 'bus use the basic gee command,...
Forum: Tech Log
4th Mar 2013, 15:59
Replies: 1,064
Views: 186,595
Posted By gums

Ahhhhhh..... back to the control law logic and...

Ahhhhhh..... back to the control law logic and implementation.

From Doze:


I don't think that's entirely accurate.

Best I can tell from the reversion sequence, the "autotrim" for the THS is...
Forum: Tech Log
23rd Feb 2013, 22:04
Replies: 1,064
Views: 186,595
Posted By gums

TNX, Doze for the pages to show the displays. ...

TNX, Doze for the pages to show the displays.

For some reason, I wonder about the same "yellow" bars whether you're too fast, too slow, too whatever. Seems to me that slow or too steep or too...
Forum: Tech Log
21st Feb 2013, 18:08
Replies: 1,064
Views: 186,595
Posted By gums

Correct, Doze, about the reference to a mach/high...

Correct, Doze, about the reference to a mach/high speed buffet. I can't read minds, especially those of ghosts, so the comment about "crazy speed" is still puzzling.

I discount confusion about...
Forum: Tech Log
21st Feb 2013, 17:05
Replies: 1,064
Views: 186,595
Posted By gums

Gotta go with PJ2. Wolf and Lyman and...

Gotta go with PJ2. Wolf and Lyman and others......



I have previously praised the aero characteristics of plane that made a stall so benign. Many planes would have been rocking/shuddering or...
Forum: Tech Log
7th Nov 2012, 20:24
Replies: 1,064
Views: 186,595
Posted By gums

from the peanut gallery

Good flamefest, but I liked Okie's observation and the input from our rotorhead Wolf.

Seems to this old and not so bold fighter type that 99% of everything ever capable of sustaining flight obeys...
Forum: Tech Log
1st Nov 2012, 23:07
Replies: 1,064
Views: 186,595
Posted By gums

Well, BOAC and Retired have it pretty much the...

Well, BOAC and Retired have it pretty much the way I see the scenario.

Don't like to be brutal but here I go from a diehard single seater and more. And I had over a 1,500 hours as an IP in...
Forum: Tech Log
31st Oct 2012, 17:59
Replies: 1,064
Views: 186,595
Posted By gums

A/P laws versus FCS laws

I had not seen Sully's opinion of the accident. Thanks for reminding us.

So I hear the narrator describing the onset of the accident - loss of the speed inputs and A/P disconnects. Then Sully...
Forum: Tech Log
6th Oct 2012, 20:18
Replies: 1,064
Views: 186,595
Posted By gums

Gotta admit it, but Lyman has a point: ...

Gotta admit it, but Lyman has a point:



As many of we human factor folks and at least one experienced FBW pilot from over 30 years ago ( yep, 30+ steenkeeng years), there is no substitute for...
Forum: Tech Log
2nd Oct 2012, 14:43
Replies: 1,064
Views: 186,595
Posted By gums

from PJ2: Guess we're from the same...

from PJ2:



Guess we're from the same "mold", PJ.

As I have oft-stated, I encouraged the fighter jocks I flew with/helped learn to use the A/P to reduce workload when things got very BZ. ...
Forum: Tech Log
1st Oct 2012, 22:08
Replies: 1,064
Views: 186,595
Posted By gums

Thank you mm43 and PJ2. I shall sit back for...

Thank you mm43 and PJ2.

I shall sit back for a while, as well, but noted the recent article about training for the A350 or whatever the thing is called. Emphasis upon flying the basic FBW system,...
Forum: Tech Log
29th Sep 2012, 22:46
Replies: 1,064
Views: 186,595
Posted By gums

What feels natural

A good point from Doze:



Trust me, Doze, I learned in planes that were basically 1930's technology. You prolly did as well, as many of us here. I was never one to resist the advances in...
Forum: Tech Log
29th Sep 2012, 20:47
Replies: 1,064
Views: 186,595
Posted By gums

I would pray that future pilots, and even some of...

I would pray that future pilots, and even some of the "monitors" of today, would understand what makes planes fly.

I do not buy into the "technology will make things feel 'natural'" argument...
Forum: Tech Log
29th Sep 2012, 15:43
Replies: 1,064
Views: 186,595
Posted By gums

Auto trim

Sorry, Doze, but I gotta go with the 'bird on this one.

Unless the new pilot learns in a FBW system that trims to relieve pressure on the stick for an AoA, then some of we dinosaurs have a point....
Forum: Tech Log
21st Sep 2012, 19:16
Replies: 1,064
Views: 186,595
Posted By gums

Yeah, PJ, like I thought. The one thing I...

Yeah, PJ, like I thought.

The one thing I question is loss of roll rate command in Alt 2. Looked to me that as we go thru the reversion sequences we lose bank angle limits and you have to add...
Forum: Tech Log
21st Sep 2012, 15:56
Replies: 1,064
Views: 186,595
Posted By gums

I must be missing something about the flight...

I must be missing something about the flight control laws and the A/P.

Seems to me that A/P disconnect should result in stick commands to the system and not keep the jet rolling or pitching up...
Forum: Tech Log
16th Sep 2012, 15:02
Replies: 1,064
Views: 186,595
Posted By gums

reduce workload or become a "monitor"

great attitude, Tex



Make no mistake, folks here, we single-seaters used the A/P, but we used it to reduce workload and not sit there and "monitor". So I flew almost 2,000 hours in a jets...
Forum: Tech Log
14th Sep 2012, 21:05
Replies: 1,064
Views: 186,595
Posted By gums

distant galaxy, far, far away

Re: The Viper and memories of a distant universe


a private message reply to another member of our group after I got his post.

Video of a Viper flight included from my private message, and...
Forum: Tech Log
14th Sep 2012, 20:54
Replies: 1,064
Views: 186,595
Posted By gums

Nuggets and newbies and dweebs and...

Sorry if I offended any of the real pilots here.

Wolf has it right, and USAF called the newbies "Joe Baggodonuts", heh heh. The term "dweebs" had not been invented yet.

I adopted the term...
Forum: Tech Log
14th Sep 2012, 00:17
Replies: 1,064
Views: 186,595
Posted By gums

Thanks, Wolf. Sure glad Doze ain't up front...

Thanks, Wolf.

Sure glad Doze ain't up front analyzing all the data and trusting HAL. Whew!

Hell, the thing is acting like we designed it. It's "their fault". etc, etc.

The AoA...
Forum: Tech Log
13th Sep 2012, 21:51
Replies: 1,064
Views: 186,595
Posted By gums

Problem I see as a dinosaur from single seat...

Problem I see as a dinosaur from single seat planes is lack of authority from the more experienced PNF. Hell, I was the aircraft commander for my whole career. Only had about 4,000 hours, but...
Forum: Tech Log
13th Sep 2012, 19:33
Replies: 1,064
Views: 186,595
Posted By gums

Why?

Thanks, Hunter. The same question that haunts me.

I see a PNF telling the nugget that "we are climbing". a few times

I realize that a "crewed" plane has to allow for experience and a clear...
Forum: Tech Log
12th Sep 2012, 03:29
Replies: 1,064
Views: 186,595
Posted By gums

Thanks, Tex and Bubbers I look at the...

Thanks, Tex and Bubbers

I look at the transcript and see the PNF call out repeatedly that "we are climbing".

yet the nugget in the other seat keeps pulling and pulling except for a few forward...
Forum: Tech Log
9th Sep 2012, 02:08
Replies: 1,064
Views: 186,595
Posted By gums

Thank you, Tex! When the plane is...

Thank you, Tex!



When the plane is doing so much, and the pilot(s) less, then this is what we get.

A simple caution light when the AP/AT disconnected would have been very useful to this old...
Forum: Tech Log
7th Sep 2012, 02:44
Replies: 1,064
Views: 186,595
Posted By gums

Pitot-static failure

Gotta admit, but detecting the pitot-staic failures due to icing and bugs or tape over the ports is different than detecting an electrical failure to the probes.

Only incident I had was a static...
Forum: Tech Log
2nd Sep 2012, 01:57
Replies: 1,064
Views: 186,595
Posted By gums

@ Nuts: You may have cracked the code. ...

@ Nuts: You may have cracked the code.



[edit] Yep, if the jet can't give you anymore, than it's the same as a conventional plane, like a J-3 Cub. you can "command" all you want, but the...
Forum: Tech Log
31st Aug 2012, 03:50
Replies: 1,064
Views: 186,595
Posted By gums

Which Nz accelerometer

The Nz command I am talking about would be that from a "strapdown" style sensor referenced to the aircraft, not a space-stabilized inertial sensor such as used for navigation and weapon delivery.
...
Forum: Tech Log
30th Aug 2012, 23:07
Replies: 1,064
Views: 186,595
Posted By gums

The one gee command

Spot on, OG, that is exactly what I am saying based upon the documents provided by several here.

So if I am at 30 degrees of pitch, the actual Airbus command would be 0.87 gee. This is different...
Forum: Tech Log
30th Aug 2012, 21:23
Replies: 1,064
Views: 186,595
Posted By gums

Good point Okie. The thing about a smaller...

Good point Okie.

The thing about a smaller and less rapid rate of elevator when on the backup gains is that HAL will keep trying to achieve the commanded gee. So after a minute of back stick, the...
Forum: Tech Log
30th Aug 2012, 04:27
Replies: 1,064
Views: 186,595
Posted By gums

Thank you, OG. A great explanation of some fine...

Thank you, OG. A great explanation of some fine points of the control laws.

As a matter of credibility, I was one of the pilots 33 years ago that talked with the engineers and flew the simulators...
Forum: Tech Log
28th Aug 2012, 01:35
Replies: 1,064
Views: 186,595
Posted By gums

Basic philosophy

Nice concept, Bubs.

Although my IP had explained a lot about AoA and lift and such, on my first flights he taught me to use pitch attitude looking at parts of the canopy rails and such. Hold an...
Showing results 1 to 35 of 44
 
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