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by rjsampson
Wed Jan 19, 2022 6:34 pm
Forum: Technical/Operations
Topic: No-wind conditions at parallel runway airports:
Replies: 9
Views: 1307

Re: No-wind conditions at parallel runway airports:

In a few places, counter-flow operations happen for other operational reasons. SAN in low visibility is a good example. 27 departures are almost universal, but 9 has an ILS and 27 does not so when the marine layer sets in they land and depart over the ocean. Which brings me to another question abou...

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by rjsampson
Mon Jan 10, 2022 4:46 am
Forum: Technical/Operations
Topic: Oceanic Clearances: Then and Now
Replies: 14
Views: 1466

Oceanic Clearances: Then and Now

Curious about Oceanic Clearances. Based on what little I know, it consists of a departing waypoint, and an arrival point on the other side of the ocean. I'm aware that there are multiple tracks that vary in numbers, according to winds, etc. Best I can tell, there are waypoints en route (GPS no doubt...

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by rjsampson
Fri Dec 31, 2021 11:54 pm
Forum: Technical/Operations
Topic: Does moving from the A32x to the A32xNEO require differences training?
Replies: 9
Views: 2012

Does moving from the A32x to the A32xNEO require differences training?

If so, how extensive would is it?

...and I suspect compared to the 737 MAX (pre-tragedy), the differences training would be far less involved?

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by rjsampson
Sun Dec 26, 2021 7:06 pm
Forum: Technical/Operations
Topic: AI vs UA/AC on Usage of Afghan Airspace
Replies: 15
Views: 3557

Re: AI vs UA/AC on Usage of Afghan Airspace

[list=][/list] Within Afghanistan - I heard at work it was Dubai controllers who were doing it under "contract" Along the G500/P550 (the single airway carved out from the US Prohibition), our discussions at work are that's being controlled by Dushanbe ATC. Well that’s interesting. Do you h...

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by rjsampson
Fri Dec 24, 2021 8:36 pm
Forum: Technical/Operations
Topic: AI vs UA/AC on Usage of Afghan Airspace
Replies: 15
Views: 3557

Re: AI vs UA/AC on Usage of Afghan Airspace

What facilities are providing ATC service within Afghan airspace? Is however that’s structured different than it was before the Taliban overrun the country?

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by rjsampson
Tue Dec 21, 2021 6:07 am
Forum: Technical/Operations
Topic: Very basic question for pilots: How do airliners slow down when they are already at flight idle?
Replies: 31
Views: 3083

Re: Very basic question for pilots: How do airliners slow down when they are already at flight idle?

You can always use the gear. :D OK perhaps my senses weren't playing tricks on me. I was a passenger on an A330 last week descending into ATL. They had speed brakes deployed seemingly all the way to pattern altitude, and were retracted just as I heard thrust being applied. A couple of minutes befor...

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by rjsampson
Sat Dec 04, 2021 11:11 am
Forum: Non-Aviation
Topic: 121.5 now a political forum in US
Replies: 57
Views: 8612

Re: 121.5 now a political forum in US

The worst part of the job was always flying with far right idiots like this Trump has only made them worse, now they’re convinced their views are legitimate and they’re not happy until they impose them on you No politics or religion in the cockpit, simple rule Max Q: You, TB, and a few others are s...

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by rjsampson
Sat Dec 04, 2021 10:43 am
Forum: Non-Aviation
Topic: 121.5 now a political forum in US
Replies: 57
Views: 8612

Re: 121.5 now a political forum in US

The WN problem is that their pilots have historically come from a more limited regional background than the other big airlines, and some of their hiring rules have favored military pilots (though, that isn't universal - they hate Osprey pilots for some reason). When a big chunk of your pilots are w...

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by rjsampson
Sat Dec 04, 2021 3:30 am
Forum: Technical/Operations
Topic: Teal Color Inside A320neo Pratt & Whitney Engines
Replies: 27
Views: 5453

Re: Teal Color Inside A320neo Pratt & Whitney Engines

Yes, it is. I suspect the reason the liner extends forward of the fan is based on the structure of the engine. Based on pictures I've seen, the inlet cowl mounting surface is several inches forward of the fan. In order to install an abradable ling only in the path of the blades, an additional flang...

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by rjsampson
Fri Dec 03, 2021 5:30 pm
Forum: Technical/Operations
Topic: Teal Color Inside A320neo Pratt & Whitney Engines
Replies: 27
Views: 5453

Re: Teal Color Inside A320neo Pratt & Whitney Engines

The Fan Blade Rubstrip (or Abradable Shroud or Attrition Lining or whatever they're called by other manufacturers) is in the plane of the fan blades. In the pictures of that PW1000G series engines it would be the light gray ring behind the teal colored ring. The teal colored ring should be acoustic...

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by rjsampson
Fri Nov 26, 2021 7:50 am
Forum: Technical/Operations
Topic: Complicated, by design. But is it really?
Replies: 20
Views: 3410

Re: Complicated, by design. But is it really?

Touch screens is a hard no for me. I hate them in my car. Nice part of an airplane flight deck is tactile feel. Snippet from the "Living the Dream" videos. Tried to keep it relevant by timestamping it on the last 40 seconds. https://youtu.be/5-knyUBbpgI?t=178 The last 3 seconds? "Why...

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by rjsampson
Fri Nov 26, 2021 7:47 am
Forum: Technical/Operations
Topic: Complicated, by design. But is it really?
Replies: 20
Views: 3410

Re: Complicated, by design. But is it really?

Touch screens is a hard no for me. I hate them in my car. Nice part of an airplane flight deck is tactile feel. Snippet from the "Living the Dream" videos. Tried to keep it relevant by timestamping it on the last 30 seconds. https://youtu.be/5-knyUBbpgI?t=178 The last 2 seconds? "Why...

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by rjsampson
Tue Nov 23, 2021 11:42 pm
Forum: Technical/Operations
Topic: Rolls-Royce To Start Testing Its Geared Big Ultrafan
Replies: 18
Views: 5721

Re: Rolls-Royce To Start Testing Its Geared Big Ultrafan

One with variable fan blade angles? https://youtu.be/zW66-EFvj64?t=60 Article: https://travelandaviation.com/rolls-royce-to-ground-test-its-biggest-engine-yet-in-2022/ I've been following the Ultrafan since its inception, and it seems that the variable fan blades were dropped from all renderings, m...

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by rjsampson
Mon Nov 15, 2021 10:27 pm
Forum: Technical/Operations
Topic: Is this sound from the APU compressor or the main powerplant compressor?
Replies: 10
Views: 1325

Re: Is this sound from the APU compressor or the main powerplant compressor?

Those are the packs you can hear in that location as well as the pack cooling fans. The pack cooling fans turn off automatically after the flaps are retracted. I'm guessing the fans don't contribute much too much to the noise, as when the flaps are fully retracted in OP's video, the sound persists....

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by rjsampson
Mon Nov 01, 2021 8:51 pm
Forum: Travel, Polls & Preferences
Topic: How many airports did you fly from around your place of residence?
Replies: 46
Views: 2126

Re: How many airports did you fly from around your place of residence?

Since living in San Diego (from 1999), I have only ever used SAN and the occasional LAX. But when starting a trip at LAX, I use Amtrak to Union Station and then the FlyAway shuttle. And that's ONLY if it's a late afternoon departure. I came to San Diego for school around the same time you did (2000...

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by rjsampson
Mon Oct 18, 2021 6:11 am
Forum: Technical/Operations
Topic: Can you talk with a handheld transreceiver to aircraft?
Replies: 17
Views: 2005

Re: Can you talk with a handheld transreceiver to aircraft?

Surprised NavCanada didn’t bill the bathtub guy. The Toronto Center controller was just so.... polite. Didn't seem miffed in the least. Maybe that's Canadian politeness. Nonetheless.... I wonder if a report would have been made after the Bathtub Guy did a radio check right after Center was talking ...

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by rjsampson
Sun Oct 17, 2021 4:54 pm
Forum: Technical/Operations
Topic: Can you talk with a handheld transreceiver to aircraft?
Replies: 17
Views: 2005

Re: Can you talk with a handheld transreceiver to aircraft?

https://m.youtube.com/watch?v=ZvA_-linhg8

That’s obviously ill-advised. Can someone chime in on whether or not this was against the law? I suspect not. He identified himself accurately!
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Handhelds can have plenty of range.

Here’s an example of someone talking to Toronto ATC …. From his bathtub!

https://m.youtube.com/watch?v=ZvA_-linhg8

That’s obviously ill-advised. Can someone chime in on whether or not this was against the law? I suspect not. He identified himself accurately!

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by rjsampson
Thu Sep 23, 2021 10:05 pm
Forum: Technical/Operations
Topic: What makes up of the JT3D hush kit?
Replies: 12
Views: 1350

Re: What makes up of the JT3D hush kit?

There was a hushkit fitted to early 707s, which looks pretty bizarre. I've heard it referred to as the "Buck Rogers". I can't imagine that this was tremendously effective (hence, why it was so difficult to find an image of it): https://i.stack.imgur.com/z6Eji.jpg Would you guys think that ...

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by rjsampson
Mon Sep 13, 2021 10:02 pm
Forum: Technical/Operations
Topic: How did they decide where to put the VOR stations?
Replies: 30
Views: 3180

Re: How did they decide where to put the VOR stations?

How wonderful to have you here, N47!! You have summoned me good sir! My bread and butter is actually ground based nav systems so i should be able to shed some light. . In an earlier post, I asked a couple of questions about the stations themselves. Would you be so kind to explain? What accounts for ...

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by rjsampson
Mon Sep 13, 2021 11:48 am
Forum: Technical/Operations
Topic: In revenue service, could the DC-10 land without using reverse thrust?
Replies: 22
Views: 2683

Re: In revenue service, could the DC-10 land without using reverse thrust?

3 installed, 2 required. One can be put on MEL. But, as Starlionblue indicated, the aircraft are certified to stop without their use. Can the AC be dispatched with either #1 or #3 inop? How many airliners have thrust reverse on MEL for dispatch? Or does this vary by the conditions for a given fligh...

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by rjsampson
Mon Sep 06, 2021 7:58 pm
Forum: Technical/Operations
Topic: How did they decide where to put the VOR stations?
Replies: 30
Views: 3180

Re: How did they decide where to put the VOR stations?

Very slightly off topic: But what accounts for the different morphologies of various VOR installations? There’s a pretty big discrepancy in sizes. Take for example, the ATL VOR. It’s pretty large… but it’s entirely flat (ie, there isn’t a cone). And I’m not sure what they’re called: The ring of boxe...

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by rjsampson
Mon Aug 23, 2021 8:49 pm
Forum: Technical/Operations
Topic: Does the DC-10 nose gear strut not meet the ground at a 90 degree angle?
Replies: 13
Views: 2305

Re: Does the DC-10 nose gear strut not meet the ground at a 90 degree angle?

battlegroup62 wrote:
And changing wheels without a jack. Not that anyone would ever use disobey an AMM.


Interesting! with all the weight on the wheels, how does that work exactly? Deflate the tire, replace with a deflated tire, re-inflate?

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by rjsampson
Fri Aug 20, 2021 10:50 pm
Forum: Technical/Operations
Topic: Kudos & Gripes: What do pilots think about the design of overhead panels on their aircraft?
Replies: 9
Views: 1358

Re: Kudos & Gripes: What do pilots think about the design of overhead panels on their aircraft?

I flew the A320 for four years and I’m currently in my 737 type rating class/sims. The 737 overhead is as if someone took a box of switches and just threw them at the overhead and where they landed is where the switch went. The A320 was much easier to look at, same for the E175 which was a simpler ...

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by rjsampson
Wed Aug 11, 2021 6:52 am
Forum: Travel, Polls & Preferences
Topic: Your expectations versus reality on your first flight experience [s]?
Replies: 13
Views: 1234

Re: Your expectations versus reality on your first flight experience [s]?

Pretty sure mine (at least the first I could remember) was on a Delta L-1011. Can't beat that! I remember looking out the window and being shocked at how quickly the cars looked like toys. ATL --> LGW. Like an above poster said: The sounds on takeoff always stayed with me! The gradual increase in fr...

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by rjsampson
Wed Aug 11, 2021 12:29 am
Forum: Technical/Operations
Topic: Continuous explosion in jet engine during operation?
Replies: 21
Views: 2544

Re: Continuous explosion in jet engine during operation?

Wacker1000 wrote:
Some of this energy is converted into mechanical energy in the turbine and the rest goes to waste out of tailpipe.


Huh? Since you mentioned "tailpipe," I assume you're no longer referring to the blowtorch. Energy going out the tailpipe is hardly wasted: It provides THRUST.

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by rjsampson
Tue Aug 10, 2021 12:10 am
Forum: Technical/Operations
Topic: Question For the Mechanics: Which Commercial Aircraft Have Been Easiest and Most Difficult For You to Work On?
Replies: 71
Views: 13513

Re: Question For the Mechanics: Which Commercial Aircraft Have Been Easiest and Most Difficult For You to Work On?

DISCLAIMER: I never worked on the aircraft beyond fueling it decades ago, I'm not an A&P, and am not personally qualified to speak to this... However, user twincommander commented on working on Learjets years ago. It's too good not to repost in this forum: If you weren't an alcoholic before you ...

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by rjsampson
Thu Aug 05, 2021 6:34 am
Forum: Travel, Polls & Preferences
Topic: What is the greatest airport in the world?
Replies: 46
Views: 3713

Re: What is the greatest airport in the world?

Biased, but KSAN. At least when passing through Terminal 2 (renovations to T1 are coming!) Busiest single-runway airport in the world (Sorry, LGW doesn't count in my mind)... incredibly efficient, handles massive amounts of traffic for its size (and of course the approach to 27 is amazing). As soon ...

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by rjsampson
Mon Jul 26, 2021 9:40 pm
Forum: Technical/Operations
Topic: Sinking feeling when leveling off on B757
Replies: 11
Views: 2304

Re: Sinking feeling when leveling off on B757

As you specifically referenced the 757, those aircraft can climb like a homesick angel, compared to virtually any other jetliner on which you'll fly. I suspect this exacerbates the effects mentioned above, thus making the sinking feeling more pronounced..

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by rjsampson
Sun Jul 25, 2021 7:13 pm
Forum: Technical/Operations
Topic: Jetbridges
Replies: 6
Views: 1596

Re: Jetbridges

One of the things you'll notice upon entering the aircraft at the end of a jet bridge is an armature with a wheel on the end, resting on the AC fuselage. The wheel senses changes in height of the aircraft, as people and baggage change its weight while embarking and disembarking. In response, hydraul...

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by rjsampson
Wed Jul 07, 2021 12:45 am
Forum: Technical/Operations
Topic: Cessna 208 Grand Caravan
Replies: 3
Views: 2749

Re: Cessna 208 Grand Caravan

No doubt info below may not answer all your questions, but I'm sure that buried in a couple of these links, there might be some helpful information: From Aircraft Cost Calculator: https://www.aircraftcostcalculator.com/AircraftOperatingCosts/3/Cessna+208+Caravan Aircraft Performance specs: https://w...

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by rjsampson
Mon Jul 05, 2021 11:31 pm
Forum: Civil Aviation
Topic: Where can I find recently archived ATC communications?
Replies: 12
Views: 1130

Re: Where can I find recently archived ATC communications?

Indeed, the message could have been transmitted via ACARS. I wonder though, 10 minutes from touchdown: If there may have been something transmitted on the radio. I'd love to check. LiveATC has archives. You need to use their actual website and not their app to listen to them. Yeah, I always use the ...

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by rjsampson
Mon Jul 05, 2021 4:36 pm
Forum: Civil Aviation
Topic: Where can I find recently archived ATC communications?
Replies: 12
Views: 1130

Where can I find recently archived ATC communications?

I had an extremely bizarre incident on a flight into SAN last week after which we were met at the jetway with police and paramedics. (It's a long story involving... a cat). I would love to have heard the communication with SoCal approach and tower on the issue. Obviously, liveatc.net easily provides...

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by rjsampson
Sun Jul 04, 2021 12:28 am
Forum: Technical/Operations
Topic: How much does a typical airline pilot know about his/her aircraft?
Replies: 22
Views: 4250

Re: How much does a typical airline pilot know about his/her aircraft?

It's like the updated sharklets on the A350. It has no material effect on how we operate the aircraft, so it isn't really an important piece of knowledge. I never knew that Airbus updated the Sharklets on the A350. How do the new Sharklets differ from the first A350 to enter service? Do they apprec...

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by rjsampson
Thu Jul 01, 2021 12:24 am
Forum: Technical/Operations
Topic: Flying cars and risks (also bmw powers a flying car)
Replies: 4
Views: 1088

Re: Flying cars and risks (also bmw powers a flying car)

boacvc10 wrote:
Ok, I may be mistaken somewhere but is the age of flying cars near us?


No. This "flying car" is... (wait for it)... an airplane.

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by rjsampson
Mon Jun 28, 2021 9:41 pm
Forum: Technical/Operations
Topic: Control tower in uncontrolled airspace
Replies: 18
Views: 1846

Re: Control tower in uncontrolled airspace

Since we're on the topic of uncrontrolled airspace, towered/non-towered, etc.

I figured we could all use a refresher on best Traffic Pattern practices at non-towered fields. In advance: You're welcome.

    https://www.youtube.com/watch?v=PMK6GRrMCdI

Enjoy.

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by rjsampson
Tue Jun 15, 2021 7:46 am
Forum: Technical/Operations
Topic: (Warning) Question about disturbing or morbid topic
Replies: 7
Views: 4618

Re: (Warning) Question about disturbing or morbid topic

This was a tragic CFIT (Controlled Flight Into Terrain) incident. Doug Feith is a friend of a family member (an accident investigator that had been featured prominently in the media throughout the 90's). From what he's said: the unfortunate pictures to which you were exposed most likely reflected th...

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by rjsampson
Wed Jun 02, 2021 4:27 am
Forum: Civil Aviation
Topic: Why is RR building History's largest aircraft engine?
Replies: 1
Views: 1701

Why is RR building History's largest aircraft engine?

[apologies if this has been previously discussed; if so, please re-direct me to the thread] Like many of you: I've been following the RR Ultrafan programme for years. I suppose the news is a month old, but they've begun construction on the world's largest aircraft engine (fan diameter 140" :o )...

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by rjsampson
Tue May 25, 2021 6:42 am
Forum: Technical/Operations
Topic: Is the UDF Engine Back from the Dead?
Replies: 41
Views: 10143

Re: Is the UDF Engine Back from the Dead?

Assuming this technology matures to the level to which Safran aspires... In the US at least: The flying public seems averse to seeing moving parts outside of the aircraft (hence one of the reasons 121 turboprop operations are all but dead for short hops, despite their economic advantages over RJs). ...

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by rjsampson
Tue May 25, 2021 6:25 am
Forum: Technical/Operations
Topic: How common is significant over fueling?
Replies: 15
Views: 3064

Re: How common is significant over fueling?

Result: Too heavy for landing. No de-fuel option available, so we refiled for FL290 i.s.o 360 and spent around an hour in the cruise with spoilers extended. It happens. :shock: You were burning off excess gas by hitting the brakes for an hour, while cruising at FL290? Yikes. Oh man... I'm guessing ...

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by rjsampson
Thu Apr 15, 2021 11:09 pm
Forum: Civil Aviation
Topic: UA flight from Savannah, GA to SFO in... a 77W??
Replies: 7
Views: 3408

Re: UA flight from Savannah, GA to SFO in... a 77W??

Ahhh... Missed the airport identifier. That explains it!

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by rjsampson
Thu Apr 15, 2021 10:55 pm
Forum: Civil Aviation
Topic: UA flight from Savannah, GA to SFO in... a 77W??
Replies: 7
Views: 3408

UA flight from Savannah, GA to SFO in... a 77W??

https://www.flightradar24.com/UAL2588/27690e52
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Came across this on FR24.

Can anyone provide insight as to why such a large AC is being utilized for such a thin, domestic route?

https://www.flightradar24.com/UAL2588/27690e52

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by rjsampson
Mon Mar 29, 2021 9:13 pm
Forum: Travel, Polls & Preferences
Topic: Examples of Where Older Versions of Aeroplanes Outlive Newer Versions
Replies: 26
Views: 3317

Re: Examples of Where Older Versions of Aeroplanes Outlive Newer Versions

Another one, the DC-9 and MD-80 outlived the MD-90. Who knows, they might even outlive the 717. Given the nature of the remaining DC-9 and MD-80 operators (military, third world and embargoed countries), it is anyone's guess if the DC-9 or MD-80 will be the last to retire). No chance of any of the ...

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by rjsampson
Mon Mar 29, 2021 9:07 pm
Forum: Technical/Operations
Topic: That PW1000 howl
Replies: 11
Views: 3461

Re: That PW1000 howl

It is the harmonics of the associated pressure changes within the combustor structure during the phase from idle to higher thrust settings that cause the distinctive sound you are hearing. :checkmark: Yep, this was brought up a few weeks ago and someone linked to a podcast, towards the end of which...

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by rjsampson
Mon Mar 08, 2021 9:51 pm
Forum: Technical/Operations
Topic: A220 Howling Sound on Approach
Replies: 19
Views: 6331

Re: A220 Howling Sound on Approach

Back to OP's topic of the A220 howling sound... It is most certainly from the engines. https://twitter.com/flightradar24/status/1335965511293825026?s=21 Podcast on the noise. For those of you without the time to listen to the 45 minute podcast: The explanation comes from P&W's VP and General Man...

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by rjsampson
Sat Feb 27, 2021 5:37 pm
Forum: Technical/Operations
Topic: Fuel flow: Same N1/EPR at different altitudes?
Replies: 9
Views: 1444

Re: Fuel flow: Same N1/EPR at different altitudes?

Makes total sense. On aircraft with moving thrust levers (ie, not-airbus): Would the thrust lever be in the same position during a T/O run at 85% N1, as it would be for 85% at FL370? Would it be lower?

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by rjsampson
Fri Feb 26, 2021 10:59 am
Forum: Technical/Operations
Topic: Fuel flow: Same N1/EPR at different altitudes?
Replies: 9
Views: 1444

Fuel flow: Same N1/EPR at different altitudes?

Gents, On takeoff: If say, an 350 is pushing out (say, 85% N1), ~80 pounds of thrust per engine... ...and is at 85% N1 at cruise: Is the fuel flow appreciably different, while pushing back far less thrust? [Disclaim the multitude of variables. Stick with ISA at TO, FL370 at cruise, etc. etc.]... jus...

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by rjsampson
Thu Feb 18, 2021 8:18 am
Forum: Technical/Operations
Topic: Do ground vehicles in airports run on jet fuel or regular diesel?
Replies: 31
Views: 4171

Re: Do ground vehicles in airports run on jet fuel or regular diesel?

I'm not sure if this is still a thing, but years ago there was a lot of talk in the GA market of developing aircraft that run on Diesel (purportedly they were more efficient than their AvGas counterparts). One of the chief benefits -- or so it was said -- was that these aircraft could run just as w...

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by rjsampson
Tue Feb 16, 2021 11:09 pm
Forum: Technical/Operations
Topic: Do ground vehicles in airports run on jet fuel or regular diesel?
Replies: 31
Views: 4171

Re: Do ground vehicles in airports run on jet fuel or regular diesel?

I'm not sure if this is still a thing, but years ago there was a lot of talk in the GA market of developing aircraft that run on Diesel (purportedly they were more efficient than their AvGas counterparts). One of the chief benefits -- or so it was said -- was that these aircraft could run just as we...

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by rjsampson
Sat Jan 30, 2021 9:16 am
Forum: Technical/Operations
Topic: A220-100 is the new 757-200
Replies: 47
Views: 5566

Re: A220-100 is the new 757-200

The Learjet 31 (and earlier 23) takes the cake for civilian aircraft, and that includes the Concorde. Apparently, flying those early Learjets wasn't worth the T/W ratio. There's a user on this forum, tb727. His color commentary is quite... interesting (as are the hundred+ posts that followed) https...

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by rjsampson
Sat Jan 30, 2021 7:35 am
Forum: Technical/Operations
Topic: A220-100 is the new 757-200
Replies: 47
Views: 5566

Re: A220-100 is the new 757-200

How “lightly” is lightly? How much of a derate applied? Is “full” thrust full or at reduced setting or full at the derate? Remember “full” means at the rating, so you can have “full” derate 1 or wash out the derates. Is the 757 so light, the TO is based on reduced thrust on the derate power. And no...

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