Hi peeps, What would be the cabin altitude of a 777W flying at FL350 vs. a A350 flying at FL380? Grandma was rebooked on an 777W instead of A350, and was curious whether she would have breathing issues. Thanks in advance! The pressure at FL350 is 3.46 psi, and 2.99 psi at FL380 http://fisicaatmo.at...Jump to post
On the A330/A350, ten knots max for a 90-degree turn is recommended. In practice, this typically means slowing to about eight knots at turn entry since you'll accelerate in the turn, unless it's uphill or something. For sure, once you get over 12 knots or so in a 90 degree turn, you feel it. If it ...Jump to post
I was asked years ago whether I preferred boxers or briefs. I replied "Depends."
Well now it's getting interesting. The "boss man" is calling for all Republicans to fall in line behind McCarthy. Let's see how much clout he has with his drones. Or it could've been he enjoyed the chaos just as much as anybody else, and wants to be seen as a savior and unifier. https://t...Jump to post
I've been a follower/contributor to this technical forum for nearly 25 years. This thread has been one of the best technical threads in those 25 years. Well done, participants. I'm not worthy to participate, only to learn!Jump to post
Turbulence is today what it always has been - mechanical, wind shear or storm induced. Combined with speed of the aircraft through the air, intensity can vary. I don't believe there is any more or less turbulent air now than 50 years ago. There is certainly more detection and forecast ability. The 3...Jump to post
In Canada, at least, that is the custom but not the rule. My sister adopted her husband's surname; my wife kept her family name with a hypenated addition of my surname i.e. HER SURNAME-Yikes! Interesting question! I know it's quite different in Iceland where most names end in son (masculine) or dott...Jump to post
However, as you can see on the UAL2 flight, the ground speeds are significantly higher at 450 MPH for 10,000ft. This can't be explained by tailwind alone. There's something else behind it.
I suspect this is the primary reason that RJs (while less fuel efficient than turboprops) are on their way out. They've been entirely phased out in the US. Looking out the window on to a massive, and massively powerfully spinning propeller, is disconcerting to much of the flying public. Shedding a ...Jump to post
The area of the fuselage in the prop arc has strengthened cabin windows and ice shields. They're only to protect from ice coming off the prop blades. If a blade is slung off the hub towards the fuselage it will penetrate the cabin like a hot knife through butter. Exactly. Those "shields" ...Jump to post
As Woodreau says, inertial alignment will be the bottleneck for any aircraft equipped with it. It takes 7-8 minutes at most latitudes. Those 7-8 minutes leave enough time to prepare everything else. Switches and pushbuttons arranged in an eye-pleasing manner, and I bet I could program the FM well e...Jump to post
n234nw wrote:Insulation blankets can also retain moisture over time and grow heavier, contributing to increased weight.
I saw a movie today with Orson Welles (The Lost Airplane? or some title like that) from 1961. Great movie btw! My question is they said that they were 10 miles up in the air, and 22,000 feet. Could that be accurate? Cause if it was, then the distance would be, from the ground to air, just about the...Jump to post
Was watching the C-17 pick-up and drop-off E II R today. Prior to engine start in Edinburgh/EGPH, the engine reverser sleeves were open and didn't close until after engine start. Then again on engine shutdown in RAF Northolt/EGWU, the sleeves were opened. Never seen this before. Any takes?Jump to post
Will this man actually pay? I read that he has failed to defend a number of defamation lawsuits so I guess he has been ordered to pay damages to other successful plaintiffs. If correct, has he paid any of the damages awarded? I don't know how it works in the US but I think that in England if you co...Jump to post
It could also be what is called a "re-Clearance" or "re-Dispatch" flight plan, which is used on payload critical flights. Let me explain. When you flight plan you have to have a certain amount of "contingency fuel" and fuel to the furthest alternate airport. These numb...Jump to post
Interesting stuff. It always impressed me how Concorde engineers effectively used fuel as a heat sink to cool the fuselage and yet the Russians with the TU-144 couldn't get if figured out and used gigantic air conditioners that made so much nose normal conversation was impossible aboard it. Last th...Jump to post
Reheat is used on every take-off, its light-up sequence taking place on the roll as the engines accelerates up to full power – it needs the mass flow associated with an N1 of 81% or more to function. It is switched off at 500ft on a standard flight or at noise abatement cut-back where needed. For t...Jump to post
Woodreau wrote:Unless otherwise directed you turn the short way so when flying 360 you turn left to 270.
Headings are almost always magnetic, not true. Only in areas near the magnetic north pole will true headings be used. . Hopefully that is about to change. NavCanada has been at the forefront of an initiative to get ICAO to change all heading/bearing references to degrees True as that is what all an...Jump to post
As previous posters have replied, the very nature of atmospheric induced static electricity, including but not limited to lightning, is unpredictable. Had lightning been predictable or even containable, our electrical engineers would have developed means to capture it years ago. So inflight, given t...Jump to post
ISA is standardized atmosphere conditions (29.92 in Hg, 1013.25 hPa; +14deg C, 57deg F at sea level). If you want to calculate Lucknow required distance, you need to adjust for pressure, and temperature. There are more factors to put in for accurate calculations, but for a "more or less accura...Jump to post
These links might add some insight to your Q's: https://www.flightera.net/en/airport/Pokhara/VNPK/ and https://www.yetiairlines.com/content/fleets VNPK/PKR Rwy 04/22 2,696 feet ASL; 1,433x30M/4,700 x 98 feet/ 0.5 degrees East variation. They may very well have a strictly VFR departure with racetrack...Jump to post
Hi all, Anyone know if there’s a technical name for the routes or designated aircraft that fly to a city then onto another, back to second city and then back to origin? Example: CDG-DUB-GLA-DUB-CDG Seems like airlines do this to serve routes without having a base there. I've never heard a name for ...Jump to post
More than 10 knots, for sure. Usually 1.3 to 1.4 times Vs1g. The 10 knots is a common additive for using 30 degrees of bank. I recall that all minimum speeds are good up to and including 30 degrees of bank. Radar altimetery (sp?) is another question asked while banked. Radar altimeters are set to g...Jump to post
Starlionblue wrote:...At a guess, that would be to keep it out of the engine exhaust.
rhesus wrote:Where is the data plate (which identifies the aircraft's build number, year etc..) located on Airbus aircraft?
On Boeing aircraft it is located on the frame of the forward left entrance door.
they say if an airplane experiences double engine failure, it won't just fall out of the sky (I find this hard to believe) they say because the airplane is gliding through the air if the airplane won't crash and will just glide through the air, then why do we hear on the news airplanes crash? First...Jump to post
Those events emitting or spreading particles in the atmosphere do occur every now and then. Now one should ask the Brit MetOffice WHY they spread their conspirancy tales about alleged "invisible clouds of death". As a matter of fact, those Vottnajökull eruptions never ever caused any seri...Jump to post
So i fly a couple different kind of business jets. We never use VNAV in the climb, very few departures have altitudes that we need to stop at or be under so we will use FLC or VS in the climb exclusively. Just set the power and climb, if there is a restriction we need to make we will just do it man...Jump to post
Max auto brake is a takeoff setting, not used for landing Not to mention, minimum turnaround times are determined by brake energy efficiency on a subsequent rejected takeoff. For instance, if a takeoff and subsequent RTO occurs without sufficient brake cooling from a previous landing, brake efficie...Jump to post
Is there ever a time when you would climb out flying a DP, and use VNAV and Flight Level Change together? I use VNAV to climb out and fly the DP with altitude constraints at each waypoint. If I want to climb straight up to what I have set in my altitude select window, I use Flight Level Change. No....Jump to post
Obviously there's extremes on both sides. I flew with a Capt. on the 727 many years ago who wouldn't turn on the thunderstorm lights in cruise and forbid any reading. every leg in the middle of the night was horrible. Then on the other end, I came up front from my rest period, MD-11, to find the F/...Jump to post
This isn't a stupid question, at all. The top brands of headsets generally come with Bluetooth, and pilots of all sorts definitely do listen to music on them during non-sterile portions of flight - though that may not be strictly following the rules at some places. After that Delta MSP overflight, ...Jump to post
I'm a little surprised that this discussion has not taken into account the segmented takeoff climb profiles or the oft times related noise abatement procedures. Modern airliners, by definition must meet certain criteria to be compliant with obstacle clearance after the takeoff segment has been compl...Jump to post
They're right here. Pilots should absolutely have the proficiency to hand fly the entire flight. And they should he proficient with flying the aircraft with the automation and understand how they interact. Agree in principle but when considering associated workloads (auto thrust, navigation systems...Jump to post
Most airports in the EU allow only idle reverse on any landing aircraft. Noise is a HUGE issue at most European airports to the point of requiring APU's to be shut down within 5 minutes of arriving on stand (gate). Becoming moreso in North America. Sorry, not specific to the thread title but incorpo...Jump to post
What was the -7 like to operate? A good friend from the Reserves flew them for Ransome Airways. Actually, merged into PAA’s list, flew the A310 and finished at DL. First "airliner" developed by then deHavilland Canada. They asked Boeing to design the flight deck. It's very "old schoo...Jump to post
Can a propeller plane be configured for idle thrust by adjusting pitch of the blades? for ground startup? For descent? The turboprop I flew had PT-6 engines. During normal operation the governor adjusted prop pitch to maintain a specific RPM. Normally 1700rpm for takeoff and landing. In cruise a lo...Jump to post
The Saab 340 was a pain when it came to deicing...start up #2, deice the left side, start up #1, shut down #2, deice the right side, and then restart #2. "Hot" deicing on turboprops was never a favourite activity of mine. We did it extensively on the Boeings but with VERY strict communica...Jump to post
Haven't read all the responses above so am confident most questions have already been answered. From my years of twin engine turboprop ops in passenger situations, the #2 was started first if not left running while passengers were up/down loaded (which was done perfectly safely especially in norther...Jump to post
Question, and a bit off topic, but would an airliner benefit from a split-rudder airbrake like the space shuttle had? Or would the complexity outweigh any benefits. The same could be said for the H-Stab. I doubt it as typical touchdown speeds for heavy jets is usually well below 200 KIAS. Touchdown...Jump to post
Are you sure the FAA would not allow the A380 to operate without thrust reversers? Do you have a source? The KC-46 is an FAA certified airplane and doesn’t have thrust reversers. Its amazing how one can still learn new things from time to time after so many years. Never knew the KC-46 has no revers...Jump to post
The C-17's capability to mimic a a falling manhole cover is impressive indeed. The 380's TR design is very simple. The only thing that stinks is getting the Safran spares to repair it. LOL! A good friend's Dad use to fly the DC-10 for KLM in the 1970's until he was forced to retire after Tenerife d...Jump to post
Yikes, the A380 is fan only reverse. It doesn’t block core exhaust. If you’re wondering why, commercial airliners rely primarily on their brakes to stop, with reverse thrust as a bonus - especially important on a contaminated runway, such as covered with snow. They’re usually at reverse idle ~ 60 k...Jump to post
Interesting, the military connection. I was amazed seeing Canada's RCAF C-17's, up close and personal, to see not only the fan thrust was "reversed" but the core thrust was blocked during landing ops. Given the ratio of 75/25 for fan/core thrust production on landing, that extra 25% block...Jump to post
Bear in mind also that the 727 had medium bypass jet engines vs the now, more common high bypass engines. Difference being, the high bypass fans have almost instantaneous thrust when accelerated vs the relatively low thrust increase of the lower bypass engine from its lower rpms.Jump to post
The KC-46 might be FAA cert’d but I’m sure they’d make an exception as it’s a military only aircraft. Probably an agreement it never gets sold in the civilian market. Interesting, the military connection. I was amazed seeing Canada's RCAF C-17's, up close and personal, to see not only the fan thrus...Jump to post