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Search: Posts Made By: asc12
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Forum: Tech Log
13th Jan 2014, 14:27
Replies: 7
Views: 2,193
Posted By asc12

Because it changed after landing, it sounds more...

Because it changed after landing, it sounds more like a GPS-derived altitude to me, but I've wondered the same thing in the past.
Forum: Biz Jets, Ag Flying, GA etc.
6th Jan 2014, 15:46
Replies: 413
Views: 166,956
Posted By asc12

Back of the envelope, and totally guessing about...

Back of the envelope, and totally guessing about the aircraft's vref:

Vref ~ 120kt
+ 5kt
+ Headwind = 0
+ Half gust component = 6
= approach IAS of 131kt
= approach TAS at 8000ft of 148kt
=...
Forum: Tech Log
19th Apr 2013, 14:41
Replies: 46
Views: 10,635
Posted By asc12

On highly laminar wings this has a major effect,...

On highly laminar wings this has a major effect, actually.

The Piaggio p180 POH contains this text and reduced figures are available for performance calculations:

"This airplane is...
Forum: Tech Log
5th Feb 2013, 18:57
Replies: 9
Views: 1,853
Posted By asc12

I think I'm still confused about the question. ...

I think I'm still confused about the question.

Are you thinking about the induced drag from the blades moving through the air and generating lift along their length?

Both lift and drag will...
Forum: Tech Log
5th Feb 2013, 15:08
Replies: 9
Views: 1,853
Posted By asc12

Another way to think about Mark 1's post is this:...

Another way to think about Mark 1's post is this:

You need to accelerate a mass of air backwards to generate a force to move your engine forwards.

You can accelerate a small amount of air by a...
Forum: Rumours & News
17th Jan 2013, 18:20
Replies: 2,185
Views: 1,031,829
Posted By asc12

It has clearly not. If you wrote this post...

It has clearly not.

If you wrote this post from a computer of some sort, you're using technology built largely outside the USA. Just because it was built elsewhere hardly means it was a bad...
Forum: Rumours & News
17th Jan 2013, 18:12
Replies: 2,185
Views: 1,031,829
Posted By asc12

It appears both the main and apu batteries are...

It appears both the main and apu batteries are Lithium Manganese.
Forum: Rumours & News
16th Jan 2013, 00:34
Replies: 266
Views: 117,873
Posted By asc12

Goodness. We're going to need a new forum for...

Goodness. We're going to need a new forum for these threads.

Can anyone tell if the airplanes with battery problems are the same planes, or even the same batteries on different aircraft? A...
Forum: Rumours & News
26th Dec 2012, 16:15
Replies: 90
Views: 76,744
Posted By asc12

Question The first report did say "landed on a road." I...

The first report did say "landed on a road." I wonder if they mistook highway lights for the runway.
Forum: Tech Log
5th Dec 2012, 14:26
Replies: 49
Views: 14,812
Posted By asc12

Regarding operation pinwheel...

The late Neptunus Lex had a first-hand account from CAPT Gray, the CO of the squadron whose Skyraiders were supposed to help the tugs get Essex in to port at Yokosuka.

The Bridges of Toko-ri «...
Forum: Tech Log
5th Oct 2012, 17:26
Replies: 22
Views: 5,123
Posted By asc12

Flight controls

I was talking this summer to an Osprey pilot, and asked him about the transition from the more vertical flight regime to the more horizontal flight regime.

As was stated above there's a cyclic and...
Forum: Spectators Balcony (Spotters Corner)
17th Jul 2012, 19:02
Replies: 22
Views: 8,662
Posted By asc12

The most alarming part of this story is that the...

The most alarming part of this story is that the 757 only had 50 passengers.
Forum: Rumours & News
24th May 2012, 15:59
Replies: 727
Views: 617,192
Posted By asc12

Winds

It's been said several times on this thread that the weather, day to day, is highly repetitive. Could someone familiar with the area please comment on the (also presumably repetitive) winds to be...
Forum: Tech Log
27th Apr 2012, 17:38
Replies: 2,133
Views: 1,673,565
Posted By asc12

Question Possibly daft question about expansion joints

The exhibit at the Seattle Museum of Flight (Alpha Golf, I think) has the story of the flight engineer who placed his cap in what's called "the expansion joint."

But I can't figure out how the...
Forum: Rumours & News
6th Apr 2012, 18:02
Replies: 53
Views: 29,306
Posted By asc12

Video removed, it seems.

Video removed, it seems.
Forum: Tech Log
9th Sep 2011, 20:31
Replies: 2,133
Views: 1,673,565
Posted By asc12

My wife thinks I'm a very odd, slightly obsessed,...

My wife thinks I'm a very odd, slightly obsessed, guy who knows too much about airplanes he doesn't fly.

I bet I know more about Concorde than the Cirrus I'm actually able to fly. Don't look at...
Forum: Tech Log
9th Sep 2011, 18:27
Replies: 2,133
Views: 1,673,565
Posted By asc12

Saw BOAG this weekend

I was in Seattle for a wedding this weekend, and got to see BOAG at the Museum of Flight.

It was gratifying, but I can't say she's in stellar condition. I'd give her a solid "B" grade. For one...
Forum: Tech Log
3rd Aug 2011, 20:32
Replies: 1,998
Views: 509,802
Posted By asc12

GPWS works like this, I'd say. "Sink Rate! Sink...

GPWS works like this, I'd say. "Sink Rate! Sink Rate!" and then "Pull up! Pull up!"

You could have Betty give an explicit suggestion (like "Pull up!") for a developed stall: "Nose down!" or...
Forum: Rumours & News
21st Jul 2011, 20:56
Replies: 109
Views: 86,674
Posted By asc12

...quite a bit. :ooh:

...quite a bit. :ooh:
Forum: Rumours & News
6th Jul 2011, 16:11
Replies: 117
Views: 57,068
Posted By asc12

It's because the liveATC recordings are very...

It's because the liveATC recordings are very often obtained on scanners. They make an effort, sometimes less successfully than others, to have an appropriate number of frequencies on a "feed," but...
Forum: Rumours & News
22nd Jun 2011, 19:26
Replies: 117
Views: 57,068
Posted By asc12

LiveATC.net recordings are often confusing, even...

LiveATC.net recordings are often confusing, even when unedited, because the recording device is usually connected to a scanner rather than just a single frequency. The jumping around is tough to...
Forum: Tech Log
23rd Apr 2011, 19:53
Replies: 2,133
Views: 1,673,565
Posted By asc12

No, I probably couldn't. Let me ask it this...

No, I probably couldn't.

Let me ask it this way: Could a student in Aeronautical Engineering calculate the lift and drag for (non-vortex) Concorde using the same equations he would use to...
Forum: Tech Log
22nd Apr 2011, 16:39
Replies: 2,133
Views: 1,673,565
Posted By asc12

Dare I ask for the more complicated version? ...

Dare I ask for the more complicated version?

Sidebar: in a supersonic wind tunnel test, do you get a sonic boom?
Forum: Tech Log
21st Apr 2011, 15:53
Replies: 2,133
Views: 1,673,565
Posted By asc12

Question I hate to go back several pages, but I still have...

I hate to go back several pages, but I still have a basic question about the lift generation when the AoA was more moderate.

When not generating vortex lift, was the airflow attached over both the...
Forum: Tech Log
13th Apr 2011, 18:51
Replies: 3,893
Views: 1,537,608
Posted By asc12

I'm with you in the camp that agrees that the...

I'm with you in the camp that agrees that the poop really left its pile (as you say, "the upset sequence started") at or after 0210. None of the available alternatives make sense-- really, including...
Forum: Tech Log
13th Apr 2011, 17:26
Replies: 3,893
Views: 1,537,608
Posted By asc12

In clear air, with visual references (including...

In clear air, with visual references (including your PFD), I think so too.

At night, in or surrounded by turbulent CBs, it seems less straightforward and I imagine you could exceed your critical...
Forum: Tech Log
13th Apr 2011, 16:16
Replies: 3,893
Views: 1,537,608
Posted By asc12

Just for clarification, would you say that it is...

Just for clarification, would you say that it is unlikely that the airplane stalled at all, or that it is unlikely that the airplane BOTH stalled AND remained that way to the surface?

It seems to...
Forum: Tech Log
8th Apr 2011, 15:08
Replies: 3,893
Views: 1,537,608
Posted By asc12

Thanks

What a thorough description of the sonar imaging process and the creation of the images themselves. Thanks auv-ee.

When I first saw the sidescan image, I thought, "where are the remaining tail...
Forum: Tech Log
7th Apr 2011, 20:15
Replies: 3,893
Views: 1,537,608
Posted By asc12

Question Resolution of sonar images

Can anyone enlighten us about the resolution of sidescan sonars? The BEA images show that the Remus AUV was using 120kHz. What sort of spatial resolution could one expect at this frequency? And how...
Forum: Tech Log
6th Apr 2011, 19:22
Replies: 3,435
Views: 1,668,312
Posted By asc12

Question Resolution of 120kHz sidescan

Nevermind. :\
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