On westbound flights from London, Concorde would begin accelerating to supersonic climb over the Bristol Channel. Look for the "ACCEL" and "DECEL" markers: http://www.concordefpl.co.uk/standroutes.pdf (lots of other great info on that site ) Given that Concorde would break the so...
Jump to postI'm hardly about to jump up and defend Boeing - their last decade plus is indefensible. However, why am I seeing suggestions to do away with plug doors or a total redesign? It strikes me that we've seen one incident all time, then we pick the low hanging and obvious fruit - doing the job that secur...
Jump to postAs noted previously, AAR's statement that it "did not perform any work on or near any mid-cabin exit door plug of that specific aircraft" was issued in response to a Deutsche Bank analyst speculating that they might have been the last ones to remove the door plug, which sent their stock do...
Jump to postNTSB says they're still looking for the circular hinge fitting (the part that was only loosely retained in the United photo) and spring. Says they're not essential for the investigation but would be useful to find.
Jump to postAlaska inspections have found additional aircraft with "loose hardware": https://news.alaskaair.com/alaska-airlines/operations/as-1282/
Jump to postJohn Ostrower has updated his story, noting that "Across the five [United] aircraft, there is little consistency in the locations of the errant parts." If true, this indicates QC problems throughout the installation of the plug doors. https://theaircurrent.com/feed/dispatches/united-finds-...
Jump to postCould someone with a better understanding of the regulations comment on whether this will trigger a full regulatory entity (NTSB) investigation? Or since no one was killed or hurt it would be deemed ‘no harm, no foul’ and left to Alaska Airlines or Boeing to review if they choose to? There will abs...
Jump to postIt appears that 737 fuselages leave Spirit with the exit plugs in place, unless these are temporary fixtures. This is the best picture I found of a MAX fuselage in transit with a plugged door: https://www.reddit.com/media?url=https%3A%2F%2Fi.redd.it%2Fds3leejazc581.jpg Of course ultimately Boeing is...
Jump to postBut as you know they acquire 787s, as you know the 787 fleet comes into play; that will give us a lot of options on where to put the 787s. Either continue to grow Honolulu; or position them in our hubs of strength on the West Coast. So we’re excited for us as we get into the international domain. ”...
Jump to postI highly doubt they will be removing the 787s. More like, they’ll be getting in touch with Boeing to get earlier slots and possibly order more 787s to fully replace the A330s and potential growth at HNL and SEA. I honestly see this as an opportunity for AS to enter the long-haul game with crew alre...
Jump to postThe more mass of the gas, the more thrust. Just assuming, but wouldn't water injected in the bypass lead to lower bypass exhaust speeds with increased mass? I would therefore expect this to be a good idea for takeoff. Mass flow is directly proportional to thrust, but the fan also has to accelerate ...
Jump to postIf a water-injection system were to be installed on an aircraft high-bypass turbofan, where would the injectors be placed? My guess is probably in the core, just after the low-pressure turbine, or in the bypass duct. Probably not injecting it into the combustion chamber, as cooling the flame would ...
Jump to postB2707SST, as a person with no real knowledge about aviation, can you explain to me what a cold air pocket does to an aircraft? This seems like a simple question, but it's a good one since there were actually several things going on at once in this case: ⋅ Cold air is denser than warm air,...
Jump to postI'm fairly certain it didn't always climb at supercruise. :shakehead: :shakehead: :shakehead: https://www.airliners.net/forum/viewtopic.php?t=745353 You can head shake all you want, but it is the truth. If weather conditions intervened, it would and could drift back down to a lower altitude. That i...
Jump to postI know it is delicate (see Columbia accident) but is the reinforced carbon carbon that was used on the space shuttle considered carbon fiber? How does it compare to titanium in weight and cost? Technically yes - RCC is carbon fiber in a graphite matrix. No idea about cost; it is light, but as you m...
Jump to postNobody wanted B757's burning over 3 tons per hour when oil was over 100 USD per barrel with analysts predicting a climb towards 200 USD per barrel. Unfortunately, the analysts were wrong as were most on this website who were predicting record oil to be a constant. Also, new engines came along and a...
Jump to postDeferred production cost is the production cost exceeding revenue. Of course it is a loss that must be recovered of the production profit of the later frames. Deferred production cost has nothing to do with revenue. It is the difference between actual production cost and the long-term estimated ave...
Jump to postIf Airbus would sell A380's for less than 150M USD, they would be selling like hot cakes. They can make a profit on that, they're just not going to say so. Have you never heard salesmen say 'we're losing money on this one' ? There are no indications whatsoever, only unsubstantiated rumors that airl...
Jump to postI disagree. It will take some investment to optimize. But in the 2030s when air travel is supposed to double, it will shine. First, this has been Airbus' business case since the A3XX days of the late 1990s, but air traffic has nearly tripled since then and yet they've only managed to sell a few hun...
Jump to postHere is a post I wrote on the topic about a year ago. Some of the numbers are out of date but the concept is the same. When Boeing or Airbus launch a new airplane program, they incur two major startup costs. The first is research and development, which reflects the cost of designing the aircraft and...
Jump to postthe third is finishing change incorporation for expected delivery tomorrow. Delivery tomorrow? What? It will need a few test flights and customer acceptance flights before that happens. Uresh's spreadsheet at http://nyc787.blogspot.com/ shows a 1/31 expected delivery date for ln 548, but apparently...
Jump to post2018 Q4 numbers are out: Deliveries: 39 Deferred production cost reduction 617 (million) Unamortized Tooling and Other Non-Recurring Cost reduction 136 Q4 reduction per plane 19,3 million Q4 Total deferred cost + tooling left 25605 million 787 Backlog at the end of December: 622 planes Reduction ne...
Jump to postWhen the SSTs were being designed in the 1960s, fuel prices were a much smaller proportion of total operating costs than they are now. Labor and capital costs were the main drivers, so there was great interest in larger (747) and faster (SST) aircraft that would spread these relatively fixed costs o...
Jump to postThere were two main reasons: increase ground clearance and allow the weather radar and nose tip pitot tube to be used when the nose was down, as the forward nose section pivoted to remain parallel to the axis of flight. The double-jointed nose was abandoned late in the 2707-200 stage as the weight r...
Jump to postNope. The future of the 777, and the possibility of the 777-300ER, was clear by the late '90s. Boeing probably should have done the 747-8 for cargo operators only. Use the GEnx (for increased thrust more than lower fuel burn), stretch the aircraft, and increase weights, but avoid the costly reprofi...
Jump to postAluminum is opaque even in extremely thin layers (think aluminum foil), so there's no way this light is coming through the fuselage itself unless you were simultaneously having a decompression event! Pretty sure this is light leakage from the windows shining through the sidewall panels that stratclu...
Jump to postThis has been the fashion since the 80s to split up conglomerates, because the perception is that if they are divided into many companies, the combined stock market value will be higher. They are seen as "easier to evaluate" by analysts. I would disagree with this somewhat. When I was get...
Jump to postI've long wondered why AF never operated Concorde services to Montreal. It would have been shorter than CDG-IAD even with a brief subsonic cruise inland from the Gulf of Maine, and takeoff noise shouldn't have been an issue given Mirabel's isolation. Seems much more viable than Caracas and Mexico Ci...
Jump to postBound for disaster, not necessarily, but there were concerns about some aspects of Concorde's design even before it flew. As the aircraft grew in size and payload during the development process, the wing area failed to keep pace and wing loading and takeoff speed increased accordingly. Growing the w...
Jump to postI wonder where their 6 747-400ERs will go, since they were the only pax models ever built. I have no idea how freighter conversions are certified, but wouldn't seem worthwhile if there's any additional work needed for this sub-type over the standard 744. Amazing how fast time goes; I remember drivin...
Jump to postZeroing out deferred balance means production cost + tooling = production revenue for a given accounting block. You're saying the revenue side of that equation doesn't matter? That only average production cost matters? Doesn't seem right. Maybe I've missed something fundamental here, if so please e...
Jump to postYour calculation of $19.5 ignores the reduction in deferred tooling. Whether to apportion cash flow from 787 sales to deferred production or tooling is largely arbitrary (as with much accounting), so it's better to look at the total deferred delta and its unit component as ~$23.5mn. True, but restr...
Jump to postI've been wanting to write a post on what program accounting and deferred production cost are for quite a while, as there seems to be a lot of confusion on these issues and they routinely hijack unrelated threads. Since this topic is actually about Boeing earnings, it seems very appropriate to do so...
Jump to post(Posted just after the above, sorry for duplicate information!) The Wall Street Journal story says the payload was lost after it " didn’t separate as planned from the upper part of the rocket ." According to Wired, Northrup Grumman provided the payload adapter as well as the satellite. If ...
Jump to postInteresting thread - I have not flown on an A380, but my 747 landings have usually been extremely smooth, with the vertical deceleration noticeably gentler than on other types due to the two sets of main gear contacting in sequence. I have noticed more rocking or bobbing motion as the fuselage settl...
Jump to postI was wondering what you guys think of the A380 - me as an airbus fan I kinda like it and would be sad if production were canceled. 1. Do you think the A380 is a generally failed aircraft? Do you think production will stop soon? 2. Do you think it is a good design and technically a really good airc...
Jump to postThe commercial case was smashed to pieces when the US realized that their "One Up" SST would never work out. Nimbies were allowed to progress on their path or even encouraged. When they tried to bring Concorde to JFK in the late 70's, It would have been no louder on landing than a 707 or ...
Jump to post16k lbs thrust requirement per engine I believe (flight int).Is that dry or wet thrust? Very unlikely that afterburners will be used on a future SST, even an SSBJ. Apart from the effect on fuel consumption, they dramatically increase takeoff noise (already a problem) and IIRC were a meaningful cont...
Jump to postOne correction: BA and AF did not receive all their aircraft for free. BA ordered 5 and AF 4 in 1972 and paid for them; I'm not sure if the purchase prices were disclosed, but at the time, Concorde listed for more than a 747. Aerospatiale/BAC built five more production frames as white-tails and foun...
Jump to postMy first 747 flight was SEA-DEN on a United -400 in the summer of 1999. Might have been a one-off but I think it was scheduled, since we booked our SEA-MSP on United instead of Northwest just to bag that 744 plus a 772 from DEN-SEA.
Jump to postTWA and Pan Am both ordered Concordes, among many others. (TWA was also the first airline to order the Boeing SST, which infuriated Pan Am.) However, everyone except BOAC and Air France let their orders expire by early 1973 - several months <i>before</i> the infamous OPEC embargo sent oil prices soa...
Jump to postI would dearly love to fly on an Aerion or Boom some day, and maybe an SSBJ-type project could be viable if development costs can be controlled, but it's very hard to make the case for an airliner-scale SST in the foreseeable future. Here are just a few of the many reasons why: <b>Noise</b>: The phy...
Jump to post<table border="0" align="CENTER" width="95%" class="quote" ><tr><td><font size="2" face="ARIAL, Helvetica, Geneva" color="#9A9DA0">Quoting <a href="/profile/JAAlbert" class="quote" target="_blank">JAAlbert</a> (<a href="#96" class="quote">Reply 96</a>):<br/><i>Exactly, implying that the top of the ...
Jump to post<table border="0" align="CENTER" width="95%" class="quote"><tr><td><font size="2" face="ARIAL, Helvetica, Geneva" color="#9A9DA0">Quoting <a href="/profile/diverted" class="quote" target="_blank">diverted</a> (<a href="#87" class="quote">Reply 87</a>):<br/><i>Yeah, I definitely have to say it looks ...
Jump to post<table border="0" align="CENTER" width="95%" class="quote"><tr><td><font size="2" face="ARIAL, Helvetica, Geneva" color="#9A9DA0">Quoting <a href="/profile/Matt6461" class="quote" target="_blank">Matt6461</a> (<a href="#52" class="quote">Reply 52</a>):<br/><i> The differential is 6,120lbs. Because p...
Jump to post<table border="0" align="CENTER" width="95%" class="quote"><tr><td><font size="2" face="ARIAL, Helvetica, Geneva" color="#9A9DA0">Quoting <a href="/profile/cloudboy" class="quote" target="_blank">cloudboy</a> (<a href="#17" class="quote">Reply 17</a>):<br/><i>Premature question. Until we know the sp...
Jump to postAlthough supersonic business jets with a low-boom design like Aerion might get away with overland flight, current technology doesn't seem to support a low-boom SST. Thus, the route network would be transoceanic, possibly with limited corridors over the very high arctic. Here are some possible routes...
Jump to post<table border="0" align="CENTER" width="95%" class="quote"><tr><td><font size="2" face="ARIAL, Helvetica, Geneva" color="#9A9DA0">Quoting <a href="/profile/enilria" class="quote" target="_blank">enilria</a> (<a href="#89" class="quote">Reply 89</a>):<br/><i>So, it seems to me that this makes the Sou...
Jump to post<table border="0" align="CENTER" width="95%" class="quote"><tr><td><font size="2" face="ARIAL, Helvetica, Geneva" color="#9A9DA0">Quoting <a href="/profile/RedChili" class="quote" target="_blank">RedChili</a> (<a href="#10" class="quote">Reply 10</a>):<br/><i>These earthquakes have struck with an av...
Jump to postNot sure this is relevant since the failure started in the 2nd stage and a full minute later, but USA Today video shows flames around the engine nozzles from at least 1:20 into the flight (when their zoom shot begins). Flames jump up to the base of one of the landing legs, flicker around for about 1...
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