Hot answers tagged

58

Even if we ignore the salaries of everyone involved; engineers, sales people, management, Q/A teams, manufacturing teams, more sales people, and then a few spare engineers... I don't understand. If it's just designing a jet engine, then raw materials cannot possibly be a major factor even if it's something like titanium or composites. While the raw ...


50

Fuel The fuel consumption of the A380 is about 11 metric tonnes per hour. With a fuel price of \$1000 per metric tonne, this results in \$11000 per flight hour. Amortization An A380 will cost about \$350M. The aircraft will be used for about 25 to 30 years, but let's assume the amortization period is about 20 years with a residual value of \$50M. With an ...


45

There is an easy way to get an idea of what magnitude the savings are: The Breguet equation can answer this. You first calculate a reference aircraft and then start all over with one that weighs 1% less. The difference in fuel consumption shows how much fuel is saved per flight. Our reference design is the A320 which has an L/D of 18 and we let it fly a ...


41

A license, once granted, is good forever (barring some enforcement action). But, you need more than just a license to fly. To use your license, while flying solo, you also need a Medical Certificate (if required for the aircraft or flight rules) and a Current BFR (Biennial Flight Review). Medical Certificates are good for 5 years until you're 40, then ...


41

The overwhelming majority of major airlines do lease at least some of their aircraft. And most airlines who choose to buy do not end up paying that full price tag. In the case of Easyjet, around half their fleet is leased (as of 2013). Leasing allows airlines with weak balance sheets or with poor future prospects to increase capacity without locking capital....


39

The short answer to both your questions are Yes. The long answer is, it's not so simple. The ATR 72 you have pictured has a top speed of 276 knots and a range of 1,300 miles. It can carry around 70 passengers. This document provides detailed comparisons of burn rates. So we can see the ATR 72 burns about 810 Liters per hour (about 214 gallons/hr). A Boeing ...


34

Assuming a regular private pilot's license (i.e. not sport/recreation), a part 61 instructor, and a rented aircraft, then you need to budget for the following: Aircraft rental (this usually includes oil and fuel) Instructor time (air and ground) Materials (books, DVDs, charts, fuel tester etc.) as recommended by your instructor Headset Third-class medical ...


34

Jet engines are some of the most complex machines ever created. They have to be as light, efficient, safe, and reliable as possible. There's a reason that most new airliners recently have been affected by delays from engine manufacturers. This is a hard balance to engineer when on a schedule and budget. Jet engines could certainly be cheaper to develop and ...


32

The LL of 100LL stands for Low Lead as it has tetra-ethyl lead added as a detonation inhibitor for high-performance engines. Despite the "low" moniker there actually is a lot of it in there, and it's toxic. This fuel is expensive for a number of reasons: The lead itself is expensive The lead additive means that a refinery must shut down and clean the lead ...


32

It depends on your location. It will vary based on cost for tie-down or hangar space, fuel costs, maintenance costs, etc. In order to compare apples to apples, let’s boil it down to a wet-Hobbs-rate. Wet-Hobbs-Rate is an all-in rate (minus tax) for the use of the aircraft to include everything except away-airport landing fees where applicable. That ...


30

Since the 1960's and 1970's when political hijackings were a problem, airplanes started to only carry the fuel required for the flight. This means a typical fuel load will be something on the order of: taxi fuel at the departure airport fuel to fly and land at the destination at a given altitude and forecast winds if an alternate is needed: fuel to fly to ...


29

For short distances, turboprops are more fuel efficient than jets. On the longer flights, the jet (turbofan) engines win the race. Turbofan engines perform best at high altitudes. At medium and low altitudes, the turboprops are more efficient engines. Since all flights start and end at low altitudes, the high altitude cruise segment needs to be long enough ...


26

I've heard it said that the break-even point for owning vs renting is 200 hours/year. I fly a lot less than that, but I don't like sharing my toys, so I own anyway. I make it a point to not actually count my cost of ownership, because it wouldn't be fun any more, but I'll give you some rough numbers. I bought a 1962 Mooney for \$30,000. That's about as ...


24

First of all, keep in mind that the Philippines has one of the shortest average populations on Earth. Their average passenger weighs a lot less than an average American or European, since weight scales roughly with the cube of height. So, 436 Filipinos don't weigh nearly as much as 436, say, Americans or Europeans, assuming average populations from each ...


22

Concorde was built for speed. But it was costly too. People did not like it much. Reality was that they didn't want to get somewhere faster by paying more. People love to pay for luxury though. That is the reason different travel classes were introduced since late 1970s. Cost of fuel and speed are NOT directly related. As you may know, Boeing 787 has ...


22

Low volume, high liability, and the overhead of certification all contribute to the high price of factory-new aircraft. Certification The process to design, build, and test an aircraft to receive a type certificate from the FAA adds time and cost to any new clean-sheet design (substantially more cost if the design is novel in some way). The design and ...


22

One % of takeoff weight is huge. On a B747 with MTOW of 300 tons, that is a weight saving of 3,000 kg, weight that needs not be lugged around for the couple of decades that the aircraft will be flying. At the aircraft factory where I used to work, there were Idea Boxes everywhere where one could deposit suggestions for weight savings, every kg saved adds to ...


21

The minimum required hours of instruction is 40 hours. How many will you need to get the license? That depends on a lot of factors. Very few students are good enough at 40 hours to pass the practical test. If you can only fly once per week, you will "forget" some of what you learned on the last lesson. "Forget" is in quotes because some of the ...


20

Much of course depends on the companies involved, but there's several common schemes in place: Lease Effectively like your lease car, you pay a fee per month or year over a contract period. At the end you either get a right to purchase the aircraft for a nominal price or it reverts to the lease company, or you extend the lease. Purchase Outright Yes, you ...


19

As jwenting pointed out, there isn't one "airport tax" - there's a whole bunch of them, and they're not all taxes (some are "fees"). airlines.org has a list of the common ones you'll pay in the USA, and approximately what they cost you. Broadly the taxes you're paying on airline tickets break down into two categories: Taxes that fund the Airport and ...


17

Besides @Sebass van Boxel's answer, I'd like to add the following: I was talking to a Fastjet pilot (ex easyJet) and he was telling me that obviously not all seats are available for a cheap price. If you book early you will get a special price but try booking a day before and you will see. As has been said, a lot of money is made on all the extra services ...


17

U.S. Energy Information Administration keeps tabs on most refined and crude prices including kerosene-type jet fuel. For those who hail from metric units' land, these are in dollars per gallon.


16

isn't the cost directly proportional to speed? No. Most fuel can be saved by flying higher because the lower air density reduces parasite drag. Provided the trip is long enough for the saving at altitude to offset the cost of getting there. Aircraft drag has two components. The parasite drag which increases with speed and the induced drag which decreases. ...


15

The optimal speed of the aircraft is set by the manufacturer. isn't the cost directly proportional to speed? No, any speed above or below the optimal one will lead to sub-optimal performance of the engine, increasing the costs. Why airlines do not offer fast or slow connections? The answer is partial speculation, but the costs do not increase ...


15

Volume Orders Discounts These result in significant discounts to the airline. While discounts are commonplace in the industry, Ryanair ordered 737-800 for an estimated 40-50 million dollars as compared to the list price of around 90 million dollars. With an order of that size Boeing could not risk losing it to another manufacturer, and will be satisfied ...


15

The flight school I fly out of rents a 152 at 86USD an hour wet. Assuming you need some cash for the burger lets say you save the remaining 14 dollars for that you are right at your 100. With the 152 cruising at just about 95 Kts you need to keep the distance (both ways) under 95nm to say in our budget. KDYL → Sky Manner (N40) is a 15nm hop and Sky Manner ...


14

Tankering fuel means that an aircraft carries not only the fuel quantity required for the flight to the destination, but also the fuel, or a part of it, required for the next leg of the trip. The aircraft is therefore its own tanker. Tankering means reduced cost This practice can be used when the difference in fuel price at departure and destination airports ...


14

Last I checked, most scientists and engineers do not make millionaire salaries. I think it's more around 100 to 250k tops. Even if you had 100 of them working for 10 years on it, that would be 250M, or a quarter of a billion dollars. The salaries in aerospace average less than 100k, it ain't IT, but they're not the issue. You can develop a basic ...


12

The plain and simple answer to your updated question is that once you get your pilot license, it is good forever. You can go 50 years without flying, and the license itself is still valid. When it comes time to fly again, depending on the type of airplane that you want to fly, you will probably also need a medical. You will need to have a Flight Review ...


12

Flying clubs and aircraft renters generally only charge for the time the plane is actually in use. In the U.S. at least, this is commonly measured using the Hobbs time (actual clock time used, triggered by oil pressure or some other indicator that the plane is "in use"), or by Tach time, which is a bit trickier but can very roughly be thought of as the ...


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