Search found 475 matches

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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: 23
Views: 1933

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: 2181

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: 4525

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: 1240

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: 1240

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: 3763

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: 3763

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: 4990

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: 4990

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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by rjsampson
Sat Jan 30, 2021 2:11 am
Forum: Technical/Operations
Topic: A220-100 is the new 757-200
Replies: 47
Views: 4990

Re: A220-100 is the new 757-200

It bears repeating, but a heavy B739 at full thrust will accelerate and climb more strongly, in some cases, than a lightly loaded 752 on a derated takeoff. Not a pilot, but I think this statement is correct. Maybe Well I would think "definitely," as the same could be said when comparing T...

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by rjsampson
Thu Jan 28, 2021 11:34 am
Forum: Travel, Polls & Preferences
Topic: New Queen of the Skies
Replies: 7
Views: 1162

Re: New Queen of the Skies

I vote the A350 as Princess of the skies

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by rjsampson
Thu Jan 28, 2021 11:00 am
Forum: Technical/Operations
Topic: A220-100 is the new 757-200
Replies: 47
Views: 4990

Re: A220-100 is the new 757-200

I remember being a passenger departing from KATL on a NW 75 back in the day. However they crunched their speeds up front: I was in a state of surprise, and inadvertently blurted "Holy @$#@!" out loud as it seemed that from spool to Vr... felt like mere seconds, jumping off a long, dry runw...

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by rjsampson
Wed Dec 09, 2020 11:28 pm
Forum: Technical/Operations
Topic: Did airline pilots have training to sound like Chuck Yeager?
Replies: 19
Views: 2798

Re: Did airline pilots have training to sound like Chuck Yeager?

BREAKING:

It was announced that Chuck Yeager passed away yesterday. :o

RIP to an incredible hero and airman.

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by rjsampson
Mon Nov 30, 2020 3:44 am
Forum: Travel, Polls & Preferences
Topic: Travel Restrictions Under a Biden Administration
Replies: 24
Views: 3322

Re: Travel Restrictions Under a Biden Administration

https://www.youtube.com/watch?v=byW1GExQB84

What do you guys think?
-->

I know a lot of us are big fans of Wendover Productions. In addition to being an AvGeek: He's pretty spot on in his videos. He recently did one of vaccine logistics. Have a look at this:

https://www.youtube.com/watch?v=byW1GExQB84

What do you guys think?

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by rjsampson
Fri Nov 27, 2020 8:23 pm
Forum: Travel, Polls & Preferences
Topic: Spirit Airlines A320Neo routes?
Replies: 12
Views: 2343

Re: Spirit Airlines A320Neo routes?

I was surprised when I flew in one of Spirit's NEO that the interiors looked identical to the CEO. I was under the impression that NEOs roll out with numerous cabin improvements, standard. Did Spirit specifically revert them to the older style, to maintain a common product?

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by rjsampson
Fri Nov 27, 2020 7:58 pm
Forum: Travel, Polls & Preferences
Topic: Travel Restrictions Under a Biden Administration
Replies: 24
Views: 3322

Re: Travel Restrictions Under a Biden Administration

I would predict that by next summer, we will see most of the restrictions gone , Doc, I know you're a physician, but I fear that your timeline is extremely optimistic. To get to a point to where most restrictions are gone, as you say it will be guided by experts, and specifically by the number of c...

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by rjsampson
Thu Nov 19, 2020 5:32 pm
Forum: Technical/Operations
Topic: San Diego (SAN) Runway touchdown zone lights on 27
Replies: 6
Views: 1940

Re: San Diego (SAN) Runway touchdown zone lights on 27

CosmicCruiser wrote:
Didn't 27 originally have an ILS until the parking garage was built?


No, 27 never had an ILS. The terrain has always prevented that from being implemented. Incidentally, the parking garage has less effect on the steeper glidepath than the terrain itself.

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by rjsampson
Thu Nov 19, 2020 2:21 am
Forum: Technical/Operations
Topic: San Diego (SAN) Runway touchdown zone lights on 27
Replies: 6
Views: 1940

San Diego (SAN) Runway touchdown zone lights on 27

The approach to runway 27 is non-precision (LOC only). However, is touchdown zone lighting. I thought you'd only find this lighting on precision approaches. Is that correct? If so, why does 27 have such lighting?

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by rjsampson
Mon Nov 09, 2020 6:48 pm
Forum: Technical/Operations
Topic: What's the procedure for runway incursion after the touchdown?
Replies: 12
Views: 2047

Re: What's the procedure for runway incursion after the touchdown?

The landing crew (IIRC the landing aircraft was a 737 classic) had to use the tiller at high speed to avoid the collision. I'm guessing it would vary by aircraft type (or perhaps I misunderstood something from a "steering" thread, and this isn't a thing at all): Don't some types lock out ...

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by rjsampson
Fri Nov 06, 2020 9:52 am
Forum: Technical/Operations
Topic: Why do some DC-9s have this extension piece on the cowling?
Replies: 17
Views: 3167

Re: Why do some DC-9s have this extension piece on the cowling?

Looks like a hush kit to me, a modification for sound reduction. It makes the engines more quiet. The DC-9 was not equipped with hush kits by default, but they've later been retrofitted with them. :checkmark: I'd have to dig up some pictures I took looking up such retrofitted engines' tailpipes but...

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by rjsampson
Fri Nov 06, 2020 9:34 am
Forum: Travel, Polls & Preferences
Topic: Your own all Premium-Class airline :D - Routes/Equipment?
Replies: 7
Views: 1033

Re: Your own all Premium-Class airline :D - Routes/Equipment?

Sounds like what you really need is an anonymous old Il-76 or An-12. Also has the upside that it is easier to fit a stripper pole. ^^^ This :lol: VSMUT: I literally choked on my food when I read your response . Thank you for the absolute funniest post I've read on a.net in years. I'm sure the OP ha...

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by rjsampson
Sat Oct 10, 2020 5:11 pm
Forum: Technical/Operations
Topic: Hardstand gates as an advantage?
Replies: 30
Views: 3776

Re: Hardstand gates as an advantage?

In the US, I would also suggest that Security strongly plays a role in airstands being rare.

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by rjsampson
Thu Oct 01, 2020 4:05 pm
Forum: Technical/Operations
Topic: Should Boeing and Airbus go for twin wheel main landing gears on their next-gen 737/A320s?
Replies: 11
Views: 2844

Re: Should Boeing and Airbus go for twin wheel main landing gears on their next-gen 737/A320s?

IRC, the highest wheel loading ever was on the 727-200. But my memory is fuzzy... You are absolutely correct. I'll have to dig up where I did the charts for this on another forum (across all weights -- still the highest wheel loading of all jetliners) to validate this for you. It began with me look...

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by rjsampson
Tue Sep 22, 2020 1:14 am
Forum: Technical/Operations
Topic: 757 vs. 767 lights
Replies: 15
Views: 3453

Re: 757 vs. 767 lights

Max, seven47 (or anyone else with the experience): Given that you have flown both types: Both the 757 and 767 are truly outstanding aircraft and a delight to operate I currently fly the 757F and the 767F I'm curious if you have any thoughts on the question I asked earlier: A 75/76 driver once told m...

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by rjsampson
Mon Sep 21, 2020 6:21 pm
Forum: Technical/Operations
Topic: 757 vs. 767 lights
Replies: 15
Views: 3453

Re: 757 vs. 767 lights

It's been years since I've heard this, but a 75/76 driver once told me that the yoke feel was different between the two. If I remember correctly, he said the 75 was "looser," requiring more range of deflection compared to the 76, which felt "tighter" to him. Can anyone confirm/de...

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by rjsampson
Thu Sep 10, 2020 7:53 pm
Forum: Technical/Operations
Topic: Do all aircraft(heavier than a set weight) have a Level-D motion sim?
Replies: 12
Views: 1183

Re: Do all aircraft(heavier than a set weight) have a Level-D motion sim?

I'm curious if anyone knows the answer posed in the OP's subject line: Do all aircraft (heavier than a set weight) have a Level-D motion sim? I would imagine part of that answer would be dictated by a point where the cost of training in the actual aircraft exceeds the cost of a sim. Does anyone have...

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by rjsampson
Thu Sep 10, 2020 6:13 pm
Forum: Technical/Operations
Topic: Boeing 727 flap sequence
Replies: 26
Views: 2304

Re: Boeing 727 flap sequence

Oh man, the hearing I have left picked up those darn B pumps that trashed my hearing to begin with in that video lol. It's gone full circle. I seem to recall you were coming off the Lear 2x, and then were subsequently exposed to the B pumps? Yikes. At least you have an excuse for not hearing your w...

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by rjsampson
Tue Aug 11, 2020 3:56 am
Forum: Technical/Operations
Topic: Electrical airplanes in Norway technically possible by 2025?
Replies: 59
Views: 4165

Re: Electrical airplanes in Norway technically possible by 2025?

Not to mention Pilot's Unions.... Good luck pushing Single Pilot operations through the multitude of those and their nuanced contracts. I'm not a knee-jerk reactionary to changes (of course I'd fly on the MAX when it re-enters service). I honestly would never fly on a single-pilot jetliner. Not 10, ...

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by rjsampson
Mon Aug 10, 2020 6:06 am
Forum: Technical/Operations
Topic: Electrical airplanes in Norway technically possible by 2025?
Replies: 59
Views: 4165

Re: Electrical airplanes in Norway technically possible by 2025?

Indeed. We are likely to see single pilot large airliners in the next 10-15 years. Arch: You are one of the absolute best contributors to these forums. Your experience, insight, and selflessness in contributing to so many threads... We're lucky for your consistent on-point knowledge. But *large* ai...

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by rjsampson
Sat Aug 01, 2020 9:08 pm
Forum: Travel, Polls & Preferences
Topic: Can anyone tell me why KSAN was running reverse operations this morning?
Replies: 1
Views: 455

Can anyone tell me why KSAN was running reverse operations this morning?

Noticed this morning all takeoffs and landings were going East.

There was an ever-so-slight marine layer; I briefly looked at a METAR, and it sure looked like solid VFR. Winds seemed calm.

I suppose those more qualified would be able to determine conditions.

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by rjsampson
Thu Jul 09, 2020 5:58 pm
Forum: Technical/Operations
Topic: PTU in Airbus?
Replies: 11
Views: 1751

Re: PTU in Airbus?

- A350: There are only two hydraulic systems, green and yellow. Both systems have two pumps, one in each engine. So if you lose an engine you retain all hydraulics. Backup hydraulics are supplied by self-contained hydraulic actuators, so there is no third "primary" system. The RAT does no...

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by rjsampson
Mon Jul 06, 2020 3:15 pm
Forum: Travel, Polls & Preferences
Topic: Is the A380 the Biggest Failure in Commercial Aviation History?
Replies: 51
Views: 3442

Re: Is the A380 the Biggest Failure in Commercial Aviation History?

So, specifically, what knowledge was gained from the design and manufacture of the Airbus A380 that would not have been achieved had the aircraft not been produced? And which specific aircraft, and particular systems, are using that knowledge? e38 I was wondering the same thing. Can anyone articula...

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by rjsampson
Tue Jun 16, 2020 7:01 pm
Forum: Technical/Operations
Topic: Stargazer L1011, the one and only Tristar flying
Replies: 7
Views: 2795

Re: Stargazer L1011, the one and only Tristar flying

About 4 months ago, I saw an L-1011 at MCI. Does anyone know which aircraft that was? Is it airworthy?

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by rjsampson
Tue Jun 02, 2020 5:53 am
Forum: Travel, Polls & Preferences
Topic: Rare and Short Lived Airline/Aircraft Combinations
Replies: 101
Views: 10979

Re: Rare and Short Lived Airline/Aircraft Combinations



The Convair 880 was operated by DAL its then new "widget" livery for about a year before being retired 1972. For most of its service life, it was painted in Delta's previous livery:

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by rjsampson
Tue Jun 02, 2020 5:39 am
Forum: Technical/Operations
Topic: A fighter providing support for a commercial aircraft?
Replies: 16
Views: 2580

Re: A fighter providing support for a commercial aircraft?

There's a YouTube video using LiveATC in which an airliner with severe controlability issues in which it was escorted by scrambled F-16 fighters throughout its (ultimately successful) landing. It's late where I am, so I'll get to it tomorrow.

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by rjsampson
Wed May 27, 2020 6:27 am
Forum: Technical/Operations
Topic: Shuttle plane
Replies: 11
Views: 3401

Re: Shuttle plane

I flew the Carvair (Interocean), during a 9 month stint in Congo, circa 1963. Actually a pretty nice aircraft for its time. Sort of a 747 with props. Wow, Bravo... What I wouldn't give to buy you some beers and just ask about your career! Have you ever considered writing a book? I guarantee you you...

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by rjsampson
Wed May 27, 2020 5:58 am
Forum: Travel, Polls & Preferences
Topic: Will Amazon Airlines ever use the 757?
Replies: 19
Views: 2263

Re: Will Amazon Airlines ever use the 757?

Haven't a lot of the "Prime Air" flights actually been contracted out re-badged to other cargo carriers (e.g. Atlas Airlines)?

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by rjsampson
Mon May 18, 2020 6:11 am
Forum: Technical/Operations
Topic: Can the A359 Do JNB-ATL for DL With Meaningful Cargo?
Replies: 98
Views: 11057

Re: Can the A359 Do JNB-ATL for DL With Meaningful Cargo?

A few things at play here, the 77L for DL had Goodyear specialize tires to increase the tyre speed limit slightly. The only time we could say the 359 might proverbially “struggle” is for a few weeks in the winter. But the rest of the time I agree it will preform better. That's interesting... I beli...

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by rjsampson
Mon May 18, 2020 5:49 am
Forum: Technical/Operations
Topic: RR CTi Fan Colour
Replies: 5
Views: 1264

Re: RR CTi Fan Colour

The turquoise color is inherent in the CTi formulation so... yes, these will be in the production engines and no, multiple colors would not be an option, nor is this for marketing purposes. It's funny, because I was curious about this a couple of years ago too. So I tried to reach out to multiple RR...

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by rjsampson
Fri May 15, 2020 5:49 am
Forum: Technical/Operations
Topic: Parking airliners on soft ground
Replies: 10
Views: 2451

Re: Parking airliners on soft ground

https://www.lotustechnologies.dev/wp-co ... 5/sink.jpg
-->

Florianopolis wrote:
Airplanes sink into "hard" pavement all the time, too. Asphalt in particular.


Case in point:

https://www.lotustechnologies.dev/wp-co ... 5/sink.jpg

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by rjsampson
Fri May 15, 2020 5:43 am
Forum: Technical/Operations
Topic: What happens to the retired aircraft?
Replies: 8
Views: 3160

Re: What happens to the retired aircraft?

I hate to be the guy to ask the "beer can" question. Some of my chemical engineer friends (not in the aviation industry) insist that scrapped "aviation grade" aluminium is never destined to hold beer. That said: A few have suggested otherwise. Is this just a euphamism? This is a ...

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by rjsampson
Fri Apr 24, 2020 6:50 am
Forum: Travel, Polls & Preferences
Topic: If the 737max is killed, will Boeing restart producing the 737NG ?
Replies: 38
Views: 4876

Re: If the 737max is killed, will Boeing restart producing the 737NG ?

jghealey, As has been discussed literally millions of times on this forum and elsewhere, passengers will have forgotten about the Max by the time it returns to service , especially now after covid-19 which will have been a huge distraction. It's already over a year since the max was properly in the ...

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by rjsampson
Fri Apr 24, 2020 6:32 am
Forum: Technical/Operations
Topic: Interesting 787 flaperon movements on takeoff
Replies: 8
Views: 1995

Interesting 787 flaperon movements on takeoff

Friends, Have a look at a passenger view of a JAL 787 taking off from SAN. After thrust is set, the flaperon fully extends, goes to neutral, deflects upwards, and cycles back down: https://youtu.be/nY-2Sp5YPEY?t=85 I've seen this takeoff from an external video -- and this flaperon movement is the sa...

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by rjsampson
Tue Apr 21, 2020 7:53 pm
Forum: Civil Aviation
Topic: Arrivals into JFK in holding patterns before landing today
Replies: 6
Views: 2629

Arrivals into JFK in holding patterns before landing today

Hope everyone is safe and doing well. Was just curious about what's going on in the skies of the US. I noticed that several arrivals into JFK today were in pretty substantial holding patterns for landing. Given how incredibly sparse the skies are: Why would this be necessary? I saw several aircraft ...

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by rjsampson
Fri Apr 17, 2020 7:43 pm
Forum: Technical/Operations
Topic: What made the 737 more "upgradable" than the 727?
Replies: 37
Views: 4647

Re: What made the 737 more "upgradable" than the 727?

The Super 27 mod did something similar. Valsan swapped out the #1 and #3 with larger JT8D-219 but kept the little 8 in the #2 slot.. The -219 gives a 4000 lb thrust boost. A FedEx buddy of mine who flew the Super 27 told me that extra 4,000 lb wasn't available on takeoff (where Stage III is enforce...

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by rjsampson
Fri Apr 17, 2020 7:35 pm
Forum: Technical/Operations
Topic: 757-200 range
Replies: 15
Views: 2987

Re: 757-200 range

Actually I believe the PW 2000 series has a little better fuel specifics than the RR aircraft BUT....that is offset be some other maintenance/reliabilty issues. Both are good engines. A far as Trump buying a RR product, I suspect that is more of his ego than anything else. :checkmark: Confirmed. He...

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by rjsampson
Fri Apr 10, 2020 12:00 am
Forum: Technical/Operations
Topic: Does reverse thrust actually decrease stopping distance?
Replies: 16
Views: 4394

Re: Does reverse thrust actually decrease stopping distance?

In regards to auto brakes are they always used or is there a place and time for using manual braking? I'm interested to know this, too. I was surprised when Starlion mentioned that the autobrakes presumably provide less force when reverse thrust is deployed. In said example of needing more stopping...

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by rjsampson
Tue Mar 31, 2020 7:03 am
Forum: Technical/Operations
Topic: Using passenger aircraft as freighters during this crisis
Replies: 20
Views: 4350

Re: Using passenger aircraft as freighters during this crisis

However, I meant there are passenger aircraft flying around with no passengers, carrying belly cargo only. That answers my question Arch, and thank you. From what I've gathered on these forums: Aircraft full of people and their bags under the floor (especially longhaul) have maybe 2-3% revenue gene...

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by rjsampson
Tue Mar 31, 2020 6:24 am
Forum: Travel, Polls & Preferences
Topic: What if the L1011 had beat DC-10 to market, and the RB211 program was flawless?
Replies: 31
Views: 4295

Re: What if the L1011 had beat DC-10 to market, and the RB211 program was flawless?

OK... GA and Galaxy answered my question pretty effectively, I do have another. Perhaps Galaxy and/or others may have insight into this. I cannot find a decent explanation on Google. What was the impetus for Lockheed to get back into the civil commercial airliner business with the L1011? If I recall...

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by rjsampson
Tue Mar 31, 2020 4:00 am
Forum: Technical/Operations
Topic: Using passenger aircraft as freighters during this crisis
Replies: 20
Views: 4350

Re: Using passenger aircraft as freighters during this crisis

Starlionblue wrote:
We've been doing this for weeks. Belly cargo only though.


Just to make sure I understand your statement correctly: Are airlines are making an effort to max out their belly cargo, on what (lightly boarded) flights are still in service? Do these involve new service agreements?

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