The same principle applies to an ordinary BBQ gas bottle. While the BBQ heats up, the gas bottle gets colder. Frost appears on the outside as the moisture in the air freezes against cold metal. In a torch, the dropping temperature also drops the pressure inside the canister so as the fuel is expended the flame gets smaller.
The makers of the Atlanta torch attempted to compensate by using twice as much fuel as needed for the flame but even then the size of the flame was halved from the beginning to the end of each torch-bearing leg. The torch draws fuel from the canister as liquid. The liquid, under pressure is forced through a tiny 65 micron orifice in the fuel pipe. Sudden expansion through the orifice results in a mixture of vapour and spray. To achieve complete vaporisation the fuel pipe twists up and through the base of the flame.
The Atlanta torch, and similar torches before it, used a simple rosette style combustor or burner - similar to those you might see on a gas stove - with gas streaming out of a series of holes. The burner is a completely new design delivering far better reliability. The new burner produces two flames simultaneously - a large, luminous external flame burning up to about 25cm and a small, well protected blue flame to constantly keep the torch alight.
The vapour entering the cup-shaped combustor is split into two streams. Some is mixed with oxygen, drawn through vents at the top of the combustor. This pre-mixed fuel burns with a hot blue flame inside the combustor acting as a pilot light.
The remaining fuel comes out of the combustor as a slow jet through 9 outlets and, without being pre-mixed with oxygen, burns at a slower rate and cooler temperature delivering a large yellow flame. The double system is highly tolerant of wind. As an extra precaution an egg-shaped windshield made of extremely thin stainless steel clips to the coiled fuel line above the combustor, also acting to broaden the base of the flame for more effect.
The shape of the torch also helps keep the flame alight. The flame is anchored with the wake generated by the curved and protective top of the torch. The windshield and the wall of the cavity in the top of the torch are made of very thin metal so that any heat build-up is minimised, also minimising the temperature of the outside of the torch making it safer to handle. The torch was developed in collaboration with eventual manufacturers, G.
Harrington Pty. A sprinkler system, added to a second wind tunnel, tested the flame against both wind and rain. According to Steven Hill, from Fuel and Combustion Technology, the researchers were mildly surprised to see the torch survive better in hard than soft rain.
And while this relay has been largely spectator-free, the flame's destination remains the same: the Olympic cauldron, which stays lit for the duration of the Games. Over the decades, the torch's appearance has become an important part of the custom. Often a visual representation of the host country, recent designs have embodied the sleek architecture of the Sydney Opera House in ; a folkloric phoenix feather, an omen of good fortune in Russia Sochi's Winter Olympics ; and the natural beauty of the Brazilian landscape Rio Past torches have traveled undersea, via parachutes and on camelback.
This year's "sakura pink" torch has a cherry blossom shape that merges five individual flames into one. It was created by designer Tokujin Yoshioka, who said over email that it is a symbol of hope and "emotional recovery" from the earthquake and tsunami that struck Japan a decade ago.
The body of the torch is partly made from recycled aluminum used in the shelters that housed survivors following the disaster. Canada and USA have unveiled their Olympic uniforms and the internet -- of course -- has thoughts. An uneasy history. Though the Olympic flame has ancient roots, the relay itself is a relatively modern affair. In fact, this symbol of international unity was in fact born out of nationalism -- it took place in Nazi Germany during the Summer Games.
Over the course of 12 days, the torch was passed along, hand by hand, for almost 2, miles. The first torch relay was held in Berlin in under Nazi rule. Hi, Andrew! Try reading through the 5th paragraph of this Wonder one more time. That should help answer your question!! Sounds like a good question for our Wonder Bank! Good one, Ryan!
Hey there, William! By researching this Wonder question, we learned that it is actually relit several months before each new Olympic Games. Thank you for visiting Wonderopolis! Hey, Chris! We hope this text found up above will help answer your question: "Although some legends hold that the Olympic flame has been kept burning ever since the first Olympic Games, in truth it is relit several months before each new Olympic Games.
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We are glad that you are enjoying these Wonders! We assume that they don't want to waste fuel in between event years. It sounds like you learned a lot from this Wonder. Are you getting excited about the Winter Olympics? We know we are! It really is a Wonder how the torch continues to stay lit. Hi, Jack!
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Wonder Can You Beatbox? Great Wonder, Zach T! We're glad you learned something new, Adam-- isn't the Olympic flame cool?! We're super sorry you didn't care for today's Wonder, Robert! We appreciate your comment and respect your opinion. We are so glad you are taking part in watching all the great events this year! We are always excited to find out, too! We love great performances, Emily, especially at the opening ceremonies of the Olympics! Thanks for guessing the Wonder today, Emily!
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We are super excited to watch the games this year, too! We can't wait to see the Olympic torch either, Helena! Check out this Wonder about another famous torch!
That's right, Danika! The Olympic Flame is relit several months before each new Olympic Games. Thanks for sharing with us, Kurt. We are undergoing some spring clearing site maintenance and need to temporarily disable the commenting feature.
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Try It Out Ready to keep learning? Ready to get crafty? To help you get in the Olympic spirit, make your own Olympic torch! Be sure to ask an adult to help you, and check the supplies list before you get started! Ready to learn more about the Olympic torch relay? Check out seven spectacular relay legs. Which of these is most impressive to you? Discuss with a friend or family member. Imagine the Olympic torch will be traveling through your town. How will you carry it to its next destination?
Will you use technology? Get creative and write a short description of how you would help move the Olympic torch to its next stop. Did you get it? Test your knowledge. What are you wondering? Wonder Words tradition symbols cauldron ancient relay competitive anxiously triggered modern Take the Wonder Word Challenge. Join the Discussion. Null Jan 11, Lucas Jan 11, I wonder,what if we raised our population higher in ? I hope you make a article about it! Jan 11, Sep 30, Thanks so much, jordan!
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