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Search: Posts Made By: BrandonSoMD
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Forum: Rumours & News
22nd Mar 2019, 16:11
Replies: 5,109
Views: 13,119,105
Posted By BrandonSoMD

Well, it's true that stall AOA doesn't change...

Well, it's true that stall AOA doesn't change with weight - but the AOA *required* for a given airspeed absolutely changes with weight - more than any other variable other than flap setting. (I am a...
Forum: Rumours & News
21st Mar 2019, 22:56
Replies: 5,109
Views: 13,119,105
Posted By BrandonSoMD

Yes. Because actual degrees of AOA really is...

Yes. Because actual degrees of AOA really is meaningless, unless you're a "boffin" interested in things like measuring the field of view from the design eye position (more nose-up means less view),...
Forum: Rumours & News
21st Mar 2019, 21:47
Replies: 5,109
Views: 13,119,105
Posted By BrandonSoMD

Well, for most pilots in a commercial setting,...

Well, for most pilots in a commercial setting, AOA by itself means nothing.

For a military or airshow pilot who maneuvers to rather excessive AOAs regularly, or uses AOA as a primary reference for...
Forum: Rumours & News
21st Mar 2019, 15:04
Replies: 5,109
Views: 13,119,105
Posted By BrandonSoMD

I think it's generally safe to assume that a...

I think it's generally safe to assume that a full-flight Level D simulator uses at least a direct derivation from the FMC load. There are quite a few different 737 simulator models out there, built...
Forum: Rumours & News
20th Mar 2019, 23:36
Replies: 5,109
Views: 13,119,105
Posted By BrandonSoMD

Both good points - although opposing views. ...

Both good points - although opposing views.

Yes, W1PF, sensor fusion and data crosschecking validation approaches Doctorate-degree difficulty - what data do you really trust? However, NYT's...
Forum: Rumours & News
20th Mar 2019, 20:38
Replies: 5,109
Views: 13,119,105
Posted By BrandonSoMD

There is a lot wrong here. I understand the point...

There is a lot wrong here. I understand the point you're trying to make - we can cross-check a lot of things and make smarter decisions about what might be wrong - but let's be accurate, since a lot...
Forum: Rumours & News
14th Mar 2019, 13:38
Replies: 5,109
Views: 13,119,105
Posted By BrandonSoMD

You will probably find a lot of things to learn...

You will probably find a lot of things to learn and appreciate in this video of the AeroPeru crash due to Pitot-static port blockage.
https://www.dailymotion.com/video/x6m3uwb
Forum: Rumours & News
14th Mar 2019, 13:37
Replies: 5,109
Views: 13,119,105
Posted By BrandonSoMD

This is one of the better comments in this...

This is one of the better comments in this discussion. As a long-time flight test engineer with personal experience flying jumpseat aboard Boeing commercial-class airplanes during many test flights,...
Forum: Rumours & News
14th Mar 2019, 13:22
Replies: 5,109
Views: 13,119,105
Posted By BrandonSoMD

I think that deserves some clarification. I don't...

I think that deserves some clarification. I don't fully agree.

I'm a 30-year flight test engineer and am currently helping to rewrite the handling qualities flight test manual for the US Navy Test...
Forum: Rumours & News
13th Mar 2019, 21:38
Replies: 5,109
Views: 13,119,105
Posted By BrandonSoMD

I don't find that at all "obvious." High speed?...

I don't find that at all "obvious." High speed? Probably. Vertical? Hardly.

Consider this photograph of the crash site - the only one I found that was taken from above ground level. I don't have...
Forum: Rumours & News
6th Nov 2015, 13:20
Replies: 2,082
Views: 2,496,108
Posted By BrandonSoMD

Not necessarily. While very unlikely, the...

Not necessarily. While very unlikely, the jackscrew nut or some other attached component can fail catastrophically, instantly releasing the stab to full nose-down control. For example, the second...
Forum: Rumours & News
6th Nov 2015, 13:16
Replies: 2,082
Views: 2,496,108
Posted By BrandonSoMD

This demonstrates a flawed understanding of the...

This demonstrates a flawed understanding of the real physical characteristics of an airliner. "Like a stone" is a complete misunderstanding of the relative density of a jet plane or its components....
Forum: Rumours & News
5th Nov 2015, 22:48
Replies: 2,082
Views: 2,496,108
Posted By BrandonSoMD

Basic aero: the horizontal stab is an upside down...

Basic aero: the horizontal stab is an upside down wing, and produces downward force. A lifting body wants to pitch down from its direction of lift. That's why the stab "wing" pushes down on the back,...
Forum: Rumours & News
5th Nov 2015, 14:24
Replies: 2,082
Views: 2,496,108
Posted By BrandonSoMD

I'm a flight test engineer. We did abused-takeoff...

I'm a flight test engineer. We did abused-takeoff tests a few years ago on a 707-class aircraft, where we inadvertently struck the tail, requiring skin repairs. We saw the high pitch on takeoff but...
Forum: Rumours & News
13th Mar 2014, 03:41
Replies: 11,831
Views: 24,214,410
Posted By BrandonSoMD

Excellent point. But the math doesn't help the...

Excellent point. But the math doesn't help the oil worker's case.

Running the computations for an oil rig platform 100 m above the ocean, and an object 348 Km away at 38,000 ft MSL, the line of...
Forum: Rumours & News
7th Jul 2013, 22:21
Replies: 2,403
Views: 2,196,883
Posted By BrandonSoMD

Okay, after watching that video, I take back...

Okay, after watching that video, I take back anything I thought about unreliable eyewitness testimony about a flipping-over aircraft.

From the distance people saw it, and given the lack of a tail...
Forum: Rumours & News
6th Jul 2013, 20:03
Replies: 2,403
Views: 2,196,883
Posted By BrandonSoMD

In the picture of the deplaning passengers, note...

In the picture of the deplaning passengers, note the fracture in the fuselage above the wing. Must have been a fairly high vertical speed impact with some pitchdown.

The debris at the seawall is...
Showing results 1 to 17 of 17


 
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