Five Unusual Questions About Aviation

Posted by at 10:03

Aviation raises all sorts of questions. I researched some of the more unusual ones to come up with the best possible answer.

#1 – Why do some planes have upright bits at the end of their wings?

Those are called winglets. The upright extensions on the wingtips ensure that aircraft fly more efficiently. The winglet reduces turbulence in the air near the wingtip. How was this discovered? By closely observing birds! They are the experts in efficient flight, which means they can teach us plenty of lessons. Fun fact: the winglets on an Airbus A330 are 2.5 metres high!

Embraer 737

#2 – Will there be electric aircraft in the future?

Electric cars are everywhere nowadays. On the ground, innovation in this field is taking place rapidly, but electrical propulsion for aircraft is not developing as quickly. It’s difficult to find a recharging station at an altitude of 10 kilometres. Even so, there are aircraft running on electricity. KLM is participating in research to make these aircraft a viable reality. In the (distant) future, we are likely to see hybrid commercial aircraft taking to the air, possibly even aircraft powered by solar energy. For more about these developments, please revisit our blogs about electric aircraft and the future of aviation.

Solar Impulse ElectricIn 2016, the Solar Impulse flew around the world, powered by the solar panels on its wings.

#3 – Does a plane need a key to start?

Can you imagine? Pilots arriving at the crew centre and opening a big cupboard full of keys. When they arrive in the cockpit, they put the key in the ignition and fire up their bird! Sadly, this is not the case. There also isn’t a key to open the door of the plane. The aircraft is started by pressing all sorts of buttons in the cockpit of the plane. You can read all about it in this blog. However, aircraft do have a horn, just like a car, and it is very loud! On the ground, it is used to warn engineering staff that maintenance is taking place around the plane.

Cockpit 787Not a key to be found in the cockpit of a Boeing 787.

#4 – Why do KLM aircraft have names?

KLM is one of the few airlines that names its planes. Although the exact reasons are lost in time, KLM’s very first plane had a nickname that was based on its registration: DD, Dikke Dirk (“Fat Dirk”). KLM selects a specific theme for each aircraft type. KLM’s Dreamliners, for instance, are all named after flowers – Sunflower, Jasmine, Lavender and Lily – which are typical Dutch export products. Our 747s are named after the world’s major cities, mainly because they operate long-haul flights. Our 737s are named after birds, while our A330s are named after famous squares worldwide.

Airbus A330s: squares
Boeing 737s: birds
Boeing 777s: world heritage sites
Boeing 747s: major cities
Boeing 747 Freighters: United East India Company ships
Boeing 787-9 Dreamliners: flowers
KLM Cityhopper’s aircraft do not have names.

Click here if you’d like to read more about the tradition of naming planes!

A330 Fascinating questions

#5 – Will we ever fly supersonically again?

For the foreseeable future, we won’t be stepping into rockets to fly to other side of the earth in less than an hour. However, it is possible to make commercial flight a lot faster. Since the demise of the Concorde, there have been no commercial planes that fly supersonically. But how fast is that exactly? Temperature affects the speed of sound. At 20° C., sound travels at 1,235 km/h. That’s pretty fast, but it could be faster. Right now, there are models in the making for hypersonic aircraft flying at Mach 5 – five times the speed of sound. There are still some problems to solve before these planes become a reality. For instance, how does one address the issue of sonic boom? After all, you don’t want to spill your morning coffee every time a plane passes through the sound barrier. Click here for more on developments in the field.

Do you have a question about aviation? Feel free to let us know!

8 Responses to Five Unusual Questions About Aviation

  1. Phillip Hunt

    I am a retired corporate and ATP pilot. I greatly enjoy reading your KLM blogs. They are quite interesting and also informative for people that fly only as passengers.

  2. S.D.Kenny

    While aircraft do not need a key to start the engine,the Boeing 747
    (Combi) aircraft did have a key. This key was to open the door between the passenger compartment and the aft cargo compartment. It looked just like any other door key except it said Boeing 747 on it.

  3. Frank

    About the key, no key but we have to connect the battery everytime, because some equipment runs on battery power too.

  4. Ruud Hirdes

    To my opnion the use of names on airplanes comes from shipping. .All ships have names and in the beginning of aviation this was taken over to airplanes as many other issues from shipping were takien over. For instance the green light at starboard (same name). The word knots for speed and the Dutch word “stuurhut”, which is the cockpit. And what about “Airship”. So, there’s a lot in common..
    Regards, Ruud H.

  5. B.i

    Isn’t BOOM supposed to offer a supersonic 45 seater jet by 2025?

  6. Ron

    How long does klm do with a airplain aprrox?
    How long does the engine goes?
    How many time the engine will be check?
    How do the chech the engine?
    If there is a flight Amsterdam -Sao Paulo the plain flight the same day back how do the check everything?
    These are my 5 questions

    • Duna

      1. this is different on each type. Embraer – short time period, 777 or 747 – longer time period.
      2. I’m not sure about this one. However engine changes occur every few years(or sooner) because of overhauls or damages.
      3. There is a time schedule for different maintenance tasks. Normally every few months a check up.
      4. There is a schedule for different tasks. For instance replace fuel filter every few months. Check inside of engine with camera let’s say every half year(do not know the exact time periods).
      5. This is called a pre flight check. Which basically means check outside if it looks ok and the plane did not get any fault messages from the last flight it is ok to go again.

  7. Jagath Rupasiri

    A good set of questions for aviation enthusiasts to improve the knowledge about aircraft engineering.

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