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Airline Begins Weighing Passengers For 'Safety'
New submitter Lopsemily writes to note that passengers on Uzbekistan Airways may face a new pre-flight check: In a recent statement, the country's flag carrier announced it will weigh passengers and their carry-on luggage prior to flights to determine how much weight they'll be adding to the plane. 'According to the rules of International Air Transport Association, airlines are obliged to carry out the regular procedures of preflight control passengers weighing with hand baggage to observe requirements for ensuring flight safety,' says the airline's statement.
Part of the problem is that airlines are cramming more seats into each plane. However the real limiting capacity for carrying people/cargo is not # of seats, its weight. Too heavy, then the plane needs extra runway to reach a higher speed just to get off the ground. Even if it does get off the ground, it may not stay that way for long if weight limits are exceeded.
Then there's the fact that we have more obese travelers. So yeah, not surprised its becoming more of a problem. And technically, weight and balance calculations are required before each flight.
Worse. https://en.wikipedia.org/wiki/...
And technically, weight and balance calculations are required before each flight.
Absolutely. Aircraft weight and balance is very important. These calculations also determine how much fuel to carry. Sometimes while in flight pilots will report unexpected fuel burn, difficulty climbing, that the plane is nose or tail heavy, and request an audit of what was loaded onto the plane (baggage/cargo). Also, if you've ever been on a plane that's relatively empty, you may notice flight attendants spreading out the passengers so that they all aren't in the front, or wherever.
Can't you get all the info you need by building sensors into the landing gear, if they're not there already. Weight change at each wheel set should give overall balance and total live load... they already know what the static load is so it's people, luggage, and fuel that vary.
You have the right to remain sentient. If you give up the right to remain sentient, you will be elected to public office
Seriously, has this ever been a problem?
There have been a half-a-dozen incidents of planes overrunning runways on takeoff or otherwise crashing because of the difference between the expected average weight of passengers and their actual (obese) weight, most notably Obese passengers could have caused plane crash, May 2003, aka Air Midwest 5481.
Further reading: The true costs of heavier passengers: Part one
Seriously, has this ever been a problem?
YES!
This is a common issue in commercial AND private aviation. Weight and balance is *critical* to flying safely and as load factors increase and aircraft sizes decrease it becomes very necessary to be more and more accurate. Let me explain why this is.
First is total weight. Aircraft are designed to handle a maximum takeoff and landing weight safely. The calculated performance numbers for the aircraft are based on it's weight. Now for a 777 another 100 lbs might be unnoticeable, but for a C150 I can assure you it is. Being over weight affects take off performance, necessary runway lengths, maximum rate of climb, and stopping distances on aborted takeoffs. It affects landing configurations, cross wind tolerances, and breaking distances. If you are in a position where you are depending on the performance of the aircraft, safety demands that you not be overweight.
Balance is next. Balance has to do with where the center of gravity is on the aircraft. The CG must fall within a very narrow range for both efficiency and safety's sake. If the CG is to far forward, it makes the nose heavier and you must apply downward force on the tail using the elevators to keep the nose up. This extra force creates drag and adds to the amount of lift the wings must create to stay in the air. All this creates drag and lowers efficiency. The problem though is you cannot just move the CG way to the aft or you make the aircraft unstable. If the CG is too far aft and you stall the aircraft cannot be brought out of the stall and will crash so for safety, you need the CG forward. The area between these two points is usually pretty small compared to the length of the aircraft and actually gets smaller as you approach the maximum operating weight.
So why does how much people weigh matter? Quite simply because you cannot exceed the maximum weight of the aircraft, and with today's tendency for people to be a bit porky makes it very easy to get overloaded. Plus, if you have an uneven distribution of porky people between front to back. Moving 100lbs of weight forward might be the difference between living or dying in a stall.
So yes, passenger weight matters, especially at high load factors where we are operating at or near the maximum ratings of the aircraft. And, now that people are weighing more and more, it matters more and more.
"File to fit, pound to insert, paint to match" - Aircraft Maintenance 101