Search found 3041 matches

  • 1
  • 2
  • 3
  • 4
  • 5
  • 61
by kalvado
Thu Apr 01, 2021 4:55 pm
Forum: Civil Aviation
Topic: Delta 757 birdstrike at SLC
Replies: 29
Views: 4841

Re: Delta 757 birdstrike at SLC

Before we go on, can you please define "Commercial aviation", and use the term properly going forward? Thanks. My response to wjcandee, in particular: " in theory, any qualified pilot could handle this situation, but everyone sleeps a little better knowing the kind of training and ex...

Jump to post
by kalvado
Thu Apr 01, 2021 12:45 pm
Forum: Technical/Operations
Topic: Sourcing old electronics for new planes
Replies: 8
Views: 1215

Re: Sourcing old electronics for new planes

Most is still old stock. Once you start talking small batch fabrication, it is not few bucks more, it is few hundreds more. It is few tenths, or few hundreds, depending on chip and sales. I've found new 8051 at 6 or 7 bucks a piece. When new, back in 80s they were at 4 bucks, I believe? As an examp...

Jump to post
by kalvado
Wed Mar 31, 2021 9:17 pm
Forum: Technical/Operations
Topic: Sourcing old electronics for new planes
Replies: 8
Views: 1215

Re: Sourcing old electronics for new planes

I cannot imagine Intel/Arm/etc will run a factory to make a few hundred chips .. a few hundred thousand would seem low to them. Most of chips are still available somewhere. A chip I ran first assembler on (8051, microcontroller back from 80s combining 8bit core, ROM and RAM, ports etc on one chip) ...

Jump to post
by kalvado
Wed Mar 31, 2021 11:20 am
Forum: Technical/Operations
Topic: Sourcing old electronics for new planes
Replies: 8
Views: 1215

Re: Sourcing old electronics for new planes

Long term availability is a part of original supplier contract. I know someone who works in car electronic components manufacturing, and they are committed to 10 year availability after the end of production - which is a lot for cars. Part of the reason why industrial grade stuff is more expensive t...

Jump to post
by kalvado
Mon Mar 29, 2021 3:23 pm
Forum: Civil Aviation
Topic: Boeing CEO's Comments On Their Next Airplane
Replies: 1355
Views: 137401

Re: Boeing CEO's Comments On Their Next Airplane

The big steps in order for a new clean sheet: 1. Cockpit functionality and programming - it needs to meet the new FAA / EASA requirements for here on out, probably a very different architecture. Some benefits - can adapt to single pilot, remote piloting, ground control, and or autonomous flight. Hu...

Jump to post
by kalvado
Mon Mar 22, 2021 5:18 pm
Forum: Civil Aviation
Topic: UA328 engine explosion at DEN
Replies: 600
Views: 107347

Re: UA328 engine explosion at DEN

I don't have any specific inside information on the engine instrumentation in 777's but a quick summary of why faulty indications remained posted for 15-30 seconds is found in the well-known pilot maxim for understanding the nature of electrical problems: "AC lies, DC dies" Because DC-pow...

Jump to post
by kalvado
Sat Mar 20, 2021 3:17 pm
Forum: Civil Aviation
Topic: Boeing CEO's Comments On Their Next Airplane
Replies: 1355
Views: 137401

Re: Boeing CEO's Comments On Their Next Airplane

Ummm, doesn't that statement contradict itself? It's called synergy. any figures to back this up? Or is it just a baseless claim? Gesendet von meinem SM-G950F mit Tapatalk Sure. Imagine factory Q making right shoes with some really sad sales. Once they invest into left shoe technology, though, they...

Jump to post
by kalvado
Sat Mar 20, 2021 10:52 am
Forum: Civil Aviation
Topic: Boeing CEO's Comments On Their Next Airplane
Replies: 1355
Views: 137401

Re: Boeing CEO's Comments On Their Next Airplane

oschkosch wrote:
MCabouie wrote:
The profit from NMA + NSA together could be greater than that from NSA alone, even if NMA isn't profitable by itself.



Ummm, doesn't that statement contradict itself?

It's called synergy.

Jump to post
by kalvado
Sat Mar 20, 2021 2:00 am
Forum: Civil Aviation
Topic: Boeing CEO's Comments On Their Next Airplane
Replies: 1355
Views: 137401

Re: Boeing CEO's Comments On Their Next Airplane

They all do. I am sure that Airbus thought they would make money off the A380, and Boeing thought they would make money off the 777X, but alas, here were are. Pretty sure that there were assumptions that a new manufacturing process would work well for 787, and look at how well that went. Right, so ...

Jump to post
by kalvado
Fri Mar 19, 2021 4:47 pm
Forum: Civil Aviation
Topic: UA328 engine explosion at DEN
Replies: 600
Views: 107347

Re: UA328 engine explosion at DEN

Haven't seen this posted. "United Receives Class Action Lawsuit Over 777 Engine Failure" https://simpleflying.com/united-class-action-lawsuit-engine-failure/ Warranted? My bet is no, since UA followed all applicable instructions and would win in court - but yes, since UA will settle out o...

Jump to post
by kalvado
Thu Mar 18, 2021 3:53 pm
Forum: Civil Aviation
Topic: US threatens to suspend CX flights
Replies: 64
Views: 14063

Re: US threatens to suspend CX flights

zeke wrote:
In Victoria the detention notice states crew are not allowed to contact anyone, not allowed to contact your airline, only allowed to contact the “Authorising Officer” which is a police officer at the hotel.

I hope that only means physical contact, not phone-email-zoom kind of things?

Jump to post
by kalvado
Tue Mar 16, 2021 8:18 pm
Forum: Non-Aviation
Topic: 10 Years Since Fukushima Earthquake and Nuclear Disaster
Replies: 78
Views: 3577

Re: 10 Years Since Fukushima Earthquake and Nuclear Disaster

Well, again - massive contamination events are not unique to nuclear industry. Since we're talking about energy, coal ash comes to mind: https://appvoices.org/coalash/disasters/ There are no 100% clean technologies. Is carbon fiber pollution solvable? Yes, of course. Would it be solved for a reason...

Jump to post
by kalvado
Tue Mar 16, 2021 5:38 pm
Forum: Non-Aviation
Topic: 10 Years Since Fukushima Earthquake and Nuclear Disaster
Replies: 78
Views: 3577

Re: 10 Years Since Fukushima Earthquake and Nuclear Disaster

maybe yes, maybe no. Nuclear wastes are treated with a lot of respect; possibly more than they actually deserve, just out of abundance of caution. Chernobyl proved that residual radiation doses are not as bad as believed by safety people. We just prefer to play it safe until we understand things be...

Jump to post
by kalvado
Tue Mar 16, 2021 3:54 pm
Forum: Non-Aviation
Topic: 10 Years Since Fukushima Earthquake and Nuclear Disaster
Replies: 78
Views: 3577

Re: 10 Years Since Fukushima Earthquake and Nuclear Disaster

The anti-nuclear people try to hype up the unavoidable truth: nuclear energy creates radioactive by-products that have harmful effects for centuries if not millennia. No matter how you try to obfuscate things, there are so many different ways to fuck up handling radioactive materials that you need ...

Jump to post
by kalvado
Tue Mar 16, 2021 3:35 pm
Forum: Non-Aviation
Topic: 10 Years Since Fukushima Earthquake and Nuclear Disaster
Replies: 78
Views: 3577

Re: 10 Years Since Fukushima Earthquake and Nuclear Disaster

Honestly speaking, whatever energy source - or industry in general - we consider, there is a real possibility of long term consequences. Hydrocarbons cause climate change, hydro changes rivers ecosystems, carbon fibers from wind turbine blade may end up in lungs over millennia... "leave no tra...

Jump to post
by kalvado
Tue Mar 16, 2021 2:32 pm
Forum: Non-Aviation
Topic: 10 Years Since Fukushima Earthquake and Nuclear Disaster
Replies: 78
Views: 3577

Re: 10 Years Since Fukushima Earthquake and Nuclear Disaster

Right, but that only applies to nuclear facilities built in areas that are less than suitable. Japan obviously does not have much of a choice where to build their facilities given their geography, but the vast majority of plants are not built in tsunami zones. It seems the real issue here is the fa...

Jump to post
by kalvado
Tue Mar 16, 2021 12:58 pm
Forum: Non-Aviation
Topic: 10 Years Since Fukushima Earthquake and Nuclear Disaster
Replies: 78
Views: 3577

Re: 10 Years Since Fukushima Earthquake and Nuclear Disaster

has anybody seen data for the last 40+ years ( 2021 and back.) ? Sightly newer data: https://www.irsn.fr/EN/Research/publications-documentation/radionuclides-sheets/environment/Documents/14C_EN_02.jpg In cities, C14 can be well below the natural level, for obvious reasons. Chernobyl seems to have h...

Jump to post
by kalvado
Mon Mar 15, 2021 9:06 pm
Forum: Non-Aviation
Topic: 49% of GOP men won't take vaccine
Replies: 114
Views: 7590

Re: 49% of GOP men won't take vaccine

I think the proportion of not taking the vaccine is quite shocking. We need herd immunity. Yep and from what I understand, the more infectious the disease, the higher proportion you need to vaccinate to reach herd immunity. Vaccine refusal should prolong or even perpetuate the epidemic, shouldn't i...

Jump to post
by kalvado
Mon Mar 15, 2021 8:28 pm
Forum: Non-Aviation
Topic: 10 Years Since Fukushima Earthquake and Nuclear Disaster
Replies: 78
Views: 3577

Re: 10 Years Since Fukushima Earthquake and Nuclear Disaster

Right, but that only applies to nuclear facilities built in areas that are less than suitable. Japan obviously does not have much of a choice where to build their facilities given their geography, but the vast majority of plants are not built in tsunami zones. It seems the real issue here is the fa...

Jump to post
by kalvado
Sun Mar 14, 2021 11:34 pm
Forum: Non-Aviation
Topic: 10 Years Since Fukushima Earthquake and Nuclear Disaster
Replies: 78
Views: 3577

Re: 10 Years Since Fukushima Earthquake and Nuclear Disaster

A question/request: Carbon-14 concentrations: there is a lot of graphics around with data from <WWII to ~1980. Mostly to showcase the irradiation from athmospheric bomb tests. sourced from https://en.wikipedia.org/wiki/Carbon-14 has anybody seen data for the last 40+ years ( 2021 and back.) ? Sight...

Jump to post
by kalvado
Sun Mar 14, 2021 3:02 am
Forum: Technical/Operations
Topic: Modern Turbofan Engine Efficiency
Replies: 23
Views: 4368

Re: Modern Turbofan Engine Efficiency

Thermodynamic efficiencies are around 55%? Seriously? The best combined cycle gas turbines reach an efficiency of IIRC 63%. Now there may be a few percent losses from running the generator, but I find 55% thermal efficiency hard to believe. Or are CCGTs run with less pressure/ temperature to minimi...

Jump to post
by kalvado
Sun Mar 14, 2021 2:46 am
Forum: Technical/Operations
Topic: How do the carrier landing aircraft manage to descend during approach with such a big positive pitch angle
Replies: 33
Views: 2769

Re: How do the carrier landing aircraft manage to descend during approach with such a big positive pitch angle

Lift is reduced in a climb only assuming a constant AoA at the same speed. Unless you're just doing a very small climb, you'd point the nose up to increase AoA. Since AoA is increased, lift increases in your typical climb. More lift means more drag, which is offset by thrust. The engine is part of ...

Jump to post
by kalvado
Sat Mar 13, 2021 3:55 pm
Forum: Civil Aviation
Topic: EK Chairman says Boeing “not getting it” on 737MAX, 787
Replies: 125
Views: 20285

Re: EK Chairman says Boeing “not getting it” on 737MAX, 787

I'm with you, but given how pensions are funded in the US, it's a lot more than the 0.1% who are relying on corporations to keep generating "shareholder value". In a way it is some kind of "auto cannibalism" then. But are the pension funds the major gamers or someone else? How m...

Jump to post
by kalvado
Sat Mar 13, 2021 3:46 pm
Forum: Technical/Operations
Topic: How do the carrier landing aircraft manage to descend during approach with such a big positive pitch angle
Replies: 33
Views: 2769

Re: How do the carrier landing aircraft manage to descend during approach with such a big positive pitch angle

On a 320 flaps 3 landing, at Vref airspeed, the nose is 5 degrees nose up, with the FPA indicating 3 degrees nose down. so my AoA during final approach in an A320 is 8 degrees of AoA and still descending to land on the runway. I could be wrong though. As far as I understand, pitch and AoA are relat...

Jump to post
by kalvado
Sat Mar 13, 2021 12:36 pm
Forum: Technical/Operations
Topic: How do the carrier landing aircraft manage to descend during approach with such a big positive pitch angle
Replies: 33
Views: 2769

Re: How do the carrier landing aircraft manage to descend during approach with such a big positive pitch angle

On a 320 flaps 3 landing, at Vref airspeed, the nose is 5 degrees nose up, with the FPA indicating 3 degrees nose down. so my AoA during final approach in an A320 is 8 degrees of AoA and still descending to land on the runway. I could be wrong though. As far as I understand, pitch and AoA are relat...

Jump to post
by kalvado
Fri Mar 12, 2021 12:15 pm
Forum: Civil Aviation
Topic: EK Chairman says Boeing “not getting it” on 737MAX, 787
Replies: 125
Views: 20285

Re: EK Chairman says Boeing “not getting it” on 737MAX, 787

They are the same engineers that built planes that you get on every day. If you don’t trust it, then please don’t get on a Boeing plane again that’s your personal problem. Well, not really. My "everyday" plane pre-covid was NG, which was designed 20 years before MAX. 20 years is a lot of ...

Jump to post
by kalvado
Thu Mar 11, 2021 4:14 pm
Forum: Civil Aviation
Topic: EK Chairman says Boeing “not getting it” on 737MAX, 787
Replies: 125
Views: 20285

Re: EK Chairman says Boeing “not getting it” on 737MAX, 787

And then he got promoted to be Chief Engineer of the 777X. Like I said, no accountability. He wasn’t promoted. He was already 777X chief engineer long before the first crash Correct, but he'd already made all the key decisions on MAX when he was promoted to 777X Chief Engineer, such as no artificia...

Jump to post
by kalvado
Thu Mar 11, 2021 3:38 pm
Forum: Civil Aviation
Topic: EK Chairman says Boeing “not getting it” on 737MAX, 787
Replies: 125
Views: 20285

Re: EK Chairman says Boeing “not getting it” on 737MAX, 787

Nothing can be designed for aviation in hours, not even a plastic part in the cabin. You can’t expect this type of speed without compromising safety and quality. That's why I am saying " few weeks with all the hurdles ". Absolutely not. Boeing originally promised RTS within 2 weeks after ...

Jump to post
by kalvado
Thu Mar 11, 2021 2:07 pm
Forum: Civil Aviation
Topic: EK Chairman says Boeing “not getting it” on 737MAX, 787
Replies: 125
Views: 20285

Re: EK Chairman says Boeing “not getting it” on 737MAX, 787

Engineers started working on a fix days after the first accident with management direction. Unfortunately a huge software redesign on an airplane Flight Controls isn’t something you do quickly and the second accident occurred. If the only thing that had happened was the LionAir incident the day bef...

Jump to post
by kalvado
Thu Mar 11, 2021 12:46 pm
Forum: Civil Aviation
Topic: Boeing nears 737 MAX order from Southwest worth billions
Replies: 239
Views: 42595

Re: Boeing nears 737 MAX order from Southwest worth billions

Doesn't matter if it's single class seating or not: the relevant question is the expected revenue for the incremental seats vs. costs for the incremental FA. One can't rule out an FA for an extra 7-12 seats, not even at AA/DL/UA/WN FA wage rates. When you are talking about dual class though you are...

Jump to post
by kalvado
Thu Mar 11, 2021 12:34 pm
Forum: Civil Aviation
Topic: EK Chairman says Boeing “not getting it” on 737MAX, 787
Replies: 125
Views: 20285

Re: EK Chairman says Boeing “not getting it” on 737MAX, 787

The recent passing of Allan McDonald https://www.npr.org/2021/03/07/974534021/remembering-allan-mcdonald-he-refused-to-approve-challenger-launch-exposed-cover made me think about how few (if any) Boeing engineers stepped forward to warn about the potential dangers of MCAS, especially after the firs...

Jump to post
by kalvado
Mon Mar 08, 2021 11:23 pm
Forum: Civil Aviation
Topic: UA328 engine explosion at DEN
Replies: 600
Views: 107347

Re: UA328 engine explosion at DEN

Because 8 deg. is pretty close to nothing and putting out a barn door on one side while thrust is immediately curtailed to at least some degree is a different animal than rolling with control surfaces. Plus the captain. It may not have been 40, but he knows the difference between 8 and even 15, eve...

Jump to post
by kalvado
Mon Mar 08, 2021 10:18 pm
Forum: Civil Aviation
Topic: UA328 engine explosion at DEN
Replies: 600
Views: 107347

Re: UA328 engine explosion at DEN

From my viewpoint of the interview, the scenario went something like this: ⋅ Engine failed after blade and cowling separation, creating both loss of thrust AND significantly increased drag, ⋅ Aircraft rolls 45 degrees right, autopilot disconnects ⋅ First response from ...

Jump to post
by kalvado
Mon Mar 08, 2021 6:54 pm
Forum: Civil Aviation
Topic: UA328 engine explosion at DEN
Replies: 600
Views: 107347

Re: UA328 engine explosion at DEN

UA1175 crew moved throttles for both engine back and forth 8 times - 4 times increasing thrust and 4 times pulling back - within 20 seconds after engine failure. Not really "responded within 4 seconds", I would say. There may be good reasons for that, but it looks strange From my viewpoin...

Jump to post
by kalvado
Mon Mar 08, 2021 6:35 pm
Forum: Technical/Operations
Topic: Engine out actions
Replies: 8
Views: 1574

Engine out actions

I happened to look at UA1175 NTSB report - 777 which lost an engine near HNL - and they did some seemingly chaotic things with throttles. Image below is a snip from NTB data docket, red and green are throttle lever position, and graph covers ~30 seconds after engine failure. It is also said that the...

Jump to post
by kalvado
Mon Mar 08, 2021 6:20 pm
Forum: Civil Aviation
Topic: UA328 engine explosion at DEN
Replies: 600
Views: 107347

Re: UA328 engine explosion at DEN

I did not purport anything. I pose the question. It took 30 seconds to determine the situation and said that was too long. Boeing has asserted a 4 second rule. Why wouldn't it apply here. Another question, fuel to a failed/failing engine seems to just keep going. I remember such an event on the gro...

Jump to post
by kalvado
Mon Mar 08, 2021 5:42 pm
Forum: Civil Aviation
Topic: UA328 engine explosion at DEN
Replies: 600
Views: 107347

Re: UA328 engine explosion at DEN

I did not purport anything. I posed a question. It took 30 seconds to determine the situation and said that was too long. I was going to just edit the above, but thought it would be better to restate and leave the original. I did not purport anything. I pose the question. It took 30 seconds to dete...

Jump to post
by kalvado
Mon Mar 08, 2021 5:36 pm
Forum: Civil Aviation
Topic: UA328 engine explosion at DEN
Replies: 600
Views: 107347

Re: UA328 engine explosion at DEN

While having such conveniences might be nice, is it necessary? Worth the expense? Not to be anti-progress in video/surveilance technology, but history would say it would have been of little use in the big picture, but if it's cheap enough, sure - why not? Everything in this industry always comes do...

Jump to post
by kalvado
Mon Mar 08, 2021 4:10 pm
Forum: Civil Aviation
Topic: UA328 engine explosion at DEN
Replies: 600
Views: 107347

Re: UA328 engine explosion at DEN

Instruments or other cockpit devices really need to provide that information. It has been reported in a number of cases that pilots have turned off the wrong engine after a serious engine misfunction. Not being a pilot I am not about to trash a pilot in that case. I will trash manufacturers for not...

Jump to post
by kalvado
Mon Mar 08, 2021 12:39 pm
Forum: Non-Aviation
Topic: Gov Cuomo fall from grace
Replies: 125
Views: 6232

Re: Gov Cuomo fall from grace

What? The typical Republican double standard? Irrelevant. It is relevant. The last four years we had a man who stood by his claim that you can grab women by their privates and no Republican cared or said anything against it. For four years we had a man who cheated on every one of his wives while th...

Jump to post
by kalvado
Sun Mar 07, 2021 7:03 pm
Forum: Non-Aviation
Topic: Gov Cuomo fall from grace
Replies: 125
Views: 6232

Re: Gov Cuomo fall from grace

What does this have to with Cuomo? :banghead: What? The typical Republican double standard? Irrelevant. If someone claims to stand to high standard, they have to be measured against this standard regardless of what other side does. Saying "they too" only means that someone lies about the ...

Jump to post
by kalvado
Sun Mar 07, 2021 4:22 pm
Forum: Civil Aviation
Topic: UA328 engine explosion at DEN
Replies: 600
Views: 107347

Re: UA328 engine explosion at DEN

30 seconds without any means of situational awareness is frightening. Surely there must be several ways to let pilots know which engine they have lost. Modern cars have a number of cameras, and 'sight evaluation' is one of the best, which could also allow assessment of the wing. From my limited exp...

Jump to post
by kalvado
Sun Mar 07, 2021 3:04 pm
Forum: Civil Aviation
Topic: UA328 engine explosion at DEN
Replies: 600
Views: 107347

Re: UA328 engine explosion at DEN

"One last thing from the video that stood out was it took 30 seconds after the engine exploded on UA1175 for the pilots instruments to show them which engine had actually failed. Even though all the bells, whistles and alerts were going off in the cockpit it took a full 30 seconds before the i...

Jump to post
by kalvado
Fri Mar 05, 2021 6:40 pm
Forum: Civil Aviation
Topic: Air France 777 painted green by Greenpeace.
Replies: 74
Views: 10692

Re: Air France 777 painted green by Greenpeace.

This seems awfully fishy...a bunch of people with ladders and long extension brushes stroll onto the tarmac, climb up on top of a plane and have time to open up paint cans and apply to the aircraft before any security personnel show up? It defies belief - sorry I don't buy it Do you think that AF p...

Jump to post
by kalvado
Fri Mar 05, 2021 6:03 pm
Forum: Civil Aviation
Topic: Air France 777 painted green by Greenpeace.
Replies: 74
Views: 10692

Re: Air France 777 painted green by Greenpeace.

This seems awfully fishy...a bunch of people with ladders and long extension brushes stroll onto the tarmac, climb up on top of a plane and have time to open up paint cans and apply to the aircraft before any security personnel show up? It defies belief - sorry I don't buy it Do you think that AF p...

Jump to post
by kalvado
Wed Mar 03, 2021 3:58 pm
Forum: Civil Aviation
Topic: F9 Deicing Incident Nashville (BNA)
Replies: 149
Views: 20800

Re: F9 Deicing Incident Nashville (BNA)

Is there any FAA involvment with those handling companies - licensing, certification or anything along those lines? Since their personnel has close access to aircraft, there should be at least some security supervision in place, but that is a different aspect of it..

Jump to post
by kalvado
Sat Feb 27, 2021 2:35 pm
Forum: Civil Aviation
Topic: Boeing CEO's Comments On Their Next Airplane
Replies: 1355
Views: 137401

Re: Boeing CEO's Comments On Their Next Airplane

I never said "Just a new wing". I said that the NMA could reality be something as simple as "Just an ER version of the NSA" So where is you brilliant idea of how Boeing covers the market from 737-7 to 788 without spending more than what I am proposing and accomplish it in less t...

Jump to post
by kalvado
Sat Feb 27, 2021 2:28 pm
Forum: Technical/Operations
Topic: Ligthning Strikes.
Replies: 12
Views: 2425

Re: Ligthning Strikes.

It seems to me that our MD10's, MD11's and B767's do not have as many strikes as our B757's which seem to be a magnet for lightning strikes. Does anyone have thoughts why the 757 would be so much more susceptible? Is it just a relative size issue? A totally wild guess - could it have something to d...

Jump to post
by kalvado
Thu Feb 25, 2021 9:42 pm
Forum: Civil Aviation
Topic: Boeing CEO's Comments On Their Next Airplane
Replies: 1355
Views: 137401

Re: Boeing CEO's Comments On Their Next Airplane

And what is so bad about such thinking for a company running in for-profit mode? The problem is the long term viability of the company. When milking the osolete and highly profitable -but still competitive as measured in efficiency- aircraft for too long, you risk ending up in a position where the ...

Jump to post
by kalvado
Thu Feb 25, 2021 9:08 pm
Forum: Civil Aviation
Topic: Boeing CEO's Comments On Their Next Airplane
Replies: 1355
Views: 137401

Re: Boeing CEO's Comments On Their Next Airplane

Why has Boeing missed the entire market segment that the A321neo has grown into? Do they need a different way to forecast? NG was doing good, so they just focused on selling WBs to few customers from a particular geographic region of the world. When you can sell 200 copies to one airline, why pursu...

Jump to post
  • 1
  • 2
  • 3
  • 4
  • 5
  • 61