If a house is burning down the firefighters put it out the same way. They don't need training based on if it started from an electrical overload or a candle falling over. Not exactly correct. You use different types of fire-extinguishers for different fires. You don't put water on electrical fire, ...
Jump to postHas Airbus given any thought to reviving the A380 freighter as a way to jump start the program? Well - jump start - no. But yes, a freighter version was part of the original plan. From http://www.aerospace-technology.com/projects/airbus_a380/ "Corporate authorisation was announced in December ...
Jump to postWhat if they do lose one engine on take off, i.e., at V1? Aren't twins certified to take off on one engine? I'm not talking about starting a take off roll on one engine, that would be insanity. I'm talking V1 speeds. Thanks. I guess so, but in that case the length or route of the flight wouldn't ma...
Jump to postLots of interesting thoughts here, but the reason tricycle replaced tail dragger is purely stability in landing ground roll and handling. WIederling touched on it with his #1 reason. Ignoring aerodynamic forces (which become small as you roll out), a tail dragger is inherently unstable. The center o...
Jump to postAs Boeing Guy has said, you can buy the additional 5kts for a price. Operators that have this need, had this added to their Manuals. An example would be CAL in the 757 would arrive at a particular Central American early in the morning when the traditional winds were in excess of 10kts on the ILS ru...
Jump to postThe primary factor on rear engine vs underslung is cost to build and operate. Passenger comfort does not enter into it. Rear engine requires stronger tail section, fuel lines running there (bigger anyway, since many a/c have the apu in the tail), etc. Also - it is harder to put large bypass engines ...
Jump to postIf it's like here in Canada, it would be things like Security Fee, Airport Improvement fee and so on. In Canada those fees are actually a huge chunk of the fare. Edit: I see now they ARE referring to things like bag fees. Not sure how that would work since not everyone has a bag. My guess is that a...
Jump to postusflyguy wrote:The bigger issues is that it is ok to send a 5 year old on a commercial flight alone. There is absolutely no reason that a 5 year old should be on a flight unaccompanied.
The issue here is not Samsung or Apple, it is Li-Ion batteries and other high power density batteries. This problem will not go away - so we need to do what we can to manage the impact. You will get nowhere banning these phones. You _may_ get somewhere trying to keep them out of checked baggage. Nor...
Jump to postThe A320 series has three hydraulic circuits, two have hydraulic pressure generated by engine driven pumps (green and yellow) and the blue system is powered by a electric pump in the fuselage, the circuits are not linked so a fluid leak from one system does not drain the other. To transfer hydrauli...
Jump to postQuoting etherealsky (Thread starter):CFM56 I don't think I've every seen an oil change on a commercial turbofan. Hadn't the L-1011 that limped into Florida on #2 because all 3 lost oil just had an 'oil change' on all 3. If I remember correctly, they did not put new o-rings on the plugs and all 3 lo...
Jump to postCorrect me if I'm wrong, but the captain calls for the evacuation not flight attendants. From what I've seen in training at airlines, the FA's wait for the captain's command for evacuation. The report states that the FA's were faced with lack of urgency from the captain to evacuate the aircraft. In...
Jump to postGreat news! I posted some time back about sfo needed to get going with remote parking. Yes it's not the premium experience but it adds a little flavor to the travel experience and most important is it will hopefully aleave planes waiting for a gate which has been a growing problem due to the surgin...
Jump to postGreat news! I posted some time back about sfo needed to get going with remote parking. Yes it's not the premium experience but it adds a little flavor to the travel experience and most important is it will hopefully aleave planes waiting for a gate which has been a growing problem due to the surgin...
Jump to postIf there is a pilot, who feels the slightest uncomfortable copying this on a sunny summer day, then I would really hate to be a passenger on his plane when he has to land in gusting sidewind, in the dark, in rain, fog, snow, wind shear, and God knows what other nasty stuff. That's what the pilots a...
Jump to postNot taking any side here, but one thing everyone here is missing: a stall has nothing to do with speed. It is only dependant on the angle of attack. And that again is not only dependant on the pitch. Good examppe for that is AF447. In the deep stall, their pitch was fairly normal, but the angle of ...
Jump to postSimultaneous icing of three heated pitot tubes, as per the BEA report, is improbable. No it is not. A systematic failure of identical systems cause by a common environment is predictable, not improbable. That is why, in critical control systems, there are 2 independent development streams. To preve...
Jump to postHi, Im reading electrical description of 787, especially starter/generator and I have got something like this: ""The kVA rating is over a load power factor range from 0,85 to 1.0 lagging and over the complete operational frequency range" what does it mean? Thanks in advance It means ...
Jump to postThis article in aviation week disputes the fan blade loss. Neither of these (aviation week or the 'friend of a friend' post) are authoritative. "Given the absence of evidence of damage to the fan stage and the intact fan case flange, it is likely the U.S. National Transportation Safety Board (N...
Jump to postThe NTSB is investigating. I've not found any report from NTSB yet - but this information comes from an Aviation Week article and indicates no damage to rotating parts of the engine. They do not attribute this as a quote, so I can't speak to it's accuracy. "Given the absence of evidence of dama...
Jump to postMy first, and only, Kai Tak experience was CRAZY. I seriously thought something was wrong. I was on Cathy coming in during a typhoon on a A340. The weather was terrible and I had no idea about the uniqueness of the Kai Tak approach. So - picture that you are a pilot - sitting in a window on Business...
Jump to postSo - in calm conditions, imagine 2 vortexes off the wings, rotating opposite directions, trending down and out from the flight path. Right, so in this case, the waking TK plane was actually crossing the path of the RAM taking off, about a kilometer down the runway. Those wake vortices are pushing a...
Jump to postStudent pilots are taught very early on to recognize that when an airplane approaches its minimum flying speed, the airflow over the wing will begin to separate or break down, creating turbulence over the tail. The degradation of lift and the associated turbulence over the tail causes the airplane ...
Jump to postSo - the wake turbulence of an aircraft ahead of you will be below it's flight path and will not start till THEY rotate. --- That means that, if your aircraft has the performance to do so, you can plan your takeoff to lift off before their lift off point and stay above their climb path. How long do...
Jump to postHere's a political question. Why should the govt ever approve a merger of two profitable companies that are ongoing entities that by their own admission will result in a loss of jobs? What exactly is the overall benefit of a merger that has no clear gain to either the employees or customers? Surely...
Jump to postDoes this technique of "rotating early to avoid wake turbulence" actually exist ? Do they mean making the take-off run shorter ? Which would imply full thrust instead of derated for example. My instinct would tell me that if you're going to fly through turbulence you'd rather have extra s...
Jump to postRCair1, does it mean that you are happy that things continue the way they are? No. In fact, I'm in an organization whose existence is precisely the use of technology in aerial firefighting. That includes evaluation of current technology as well as future. I was going to reply to your message, but s...
Jump to postI hesitate to even waste my time responding to this post because it is clear that your opinion, based upon what expertise I'm not sure, is not open to influence. You may, in fact, just be trolling. However, I'll respond to a few items because there may be people here that could benefit from a bit of...
Jump to postThe DC-10 tanker is pretty useless by itself on big fires like the ones raging in California now. It's comparable to trying to extinguish or even control a fire engulfing the entire Empire State building using a single fire extinguisher. The way they are doing it now, they might as well not do it a...
Jump to postA lot has been going on at DEN, the most important of which appears to be that the Airport is moving ahead with plans to reconfigure the majority of the "Great Hall" into airside space to go back to the way it was pre-9/11, with lots of retail and open space under the tent at the airport....
Jump to postJust saw an ad for the movie. It opens September 9. Yeah - I've seen a few. They are not making me feel warm and fuzzy about the movie. I think Tom Hanks is a great actor, so I had/have high hopes, but ...i dunno... Seems like they are drumming up a bunch of controversy based on the investigation. ...
Jump to postSheesh, there's a lot of anti-government sentiment in here. "Congress should fix congress first", etc. Well, this is the kind of thing governments *do*. If congress wants to "fix congress", it should be doing more stuff like this and less stuff like shutting the government down ...
Jump to postSEPilot wrote:IIRC, outlined exits are only a requirement for airliners, not private aircraft.
This is correct. Trump's plane is most likely flown under Part 91, which is what most Cessnas and Pipers fly under.
Aircraft perform 'Touch and Go' landings for training and maintenance purposes all the time. Are TOGA procedures all that much different ? Yes and no. A 'touch and go' is planned, so you touch down primed ready to 'go'. A missed approach (abandon the landing and go around before touching down) and ...
Jump to postDidn't see this posted here yet, here is a video of the engine failure. https://www.youtube.com/watch?v=urpr59HpEuY Reference all the discussions about controlability at low and high speed, watch the rudder. Pretty cool. Initially pretty hard right, as you would expect from a loss of #1, then prett...
Jump to postAs uncomfortable as it is for 12+ hours in economy, the 2-5-2 seating in the KE 772 made it somewhat bearable to sit at one of the window seats. Why are airlines now opting for 3-3-3? Wouldn't that make 2 entire window seat aisles basically unusable compared to the single bad aisle in the 2-5-2 arr...
Jump to postThrowing resources at a late program make it .... later :-) (original from "Mythical Man Month: .. throwing manpower at a late ... ) Throwing hardware at it may not be the same as mythical man month. And believe me - I've been in the middle of a few mythical man months. If tests are taking lon...
Jump to postMaybe I missed something in your argumentation. You rule out terrorism because they tried to extinguish a fire ? This doesn't make any sense! Unless it is not clear what the source of the fire was you cannot rule out anything! The source of the fire could have been a bomb as well. It technically co...
Jump to postOne of the 2 Bell 525 Relentless Prototypes crashed yesterday killing both people on board. Sad day for Bell and for the families. Related stories http://www.verticalmag.com/news/two-kil ... -07-16-opt http://www.wfaa.com/news/local/helicopt ... /265212099 Prayers for the families and employees of B...
Jump to postCan anybody list good movies also? I don't know much about movies. Rajrs. I liked "birds of prey" and "the secret war of Jackie's girls" At least I seem to have fond memories of them from long ago. Birds of prey has crazy helicopter flight scenes. Secret way was set in very earl...
Jump to postI think it has mostly to do with helicopter traffic filing flight plans. I've noticed a few heli's over time, but the majority do not show up. That is even when I know they are up and flying (since I work in aerial firefighting that is common). I wish they did.
Jump to postI'm sorry Zeke. Based upon my 30 or so years of firefighting, that was not 'thin layer of oil' burning. There was significant fuel there (fuel from the sense of a combustible material). I am very disappointed with your comments. Oh no - my life is over... ;) Let me put it another way, if 35l of oil...
Jump to postWhat was burning was a thin layer of engine oil that migrated across the wing due to airflow. The metallic wing did not burn, nor was the fuel tank compromised. Now if you go back to you basic fire triangle, fuel, heat, air. The fuel was limited to the thin layer of oil that remained attached to th...
Jump to postIf the fire is inside the cabin, not opening doors will pretty soon give you a lesson in chemistry, the one where oxygen oxidizes carbon (as in burning the interior up) and forms carbon (di)oxide. But it is absolutely true that opening doors will "fuel" the fire. In an in-cabin fire situa...
Jump to postThe rudder provides authority only down to a certain airspeed.
The nosewheel will castor to straight by default. Of course, if you have significant cross wind it can be interesting, but remember, you have differential brakes. You can brake on one side or the other.
One question though: is is somehow related to the aircraft type - say, you wouldn't prefer that with a B737 / A380 combo? IF wake turbulence is an issue then the larger (wake category) aircraft cannot pass the smaller. They can get right next to each other and the smaller is allowed to pass the lar...
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/sovietjet" class="quote" target="_blank">sovietjet</a> (<a href="#187" class="quote">Reply 187</a>):<br/><i>Yea just those two, but isn't that e...
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/aeronaftis" class="quote" target="_blank">aeronaftis</a> (<a href="#165" class="quote">Reply 165</a>):<br/><i>Quoting rcair1 (Reply 163): What s...
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/D+L+X" class="quote" target="_blank">D L X</a> (<a href="#157" class="quote">Reply 157</a>):<br/><i>Adding extra batteries means extra maintenan...
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