Torch Construction
To get an mind of how a Aaron’s rod is construct , let ’s front at two recent Olympic torches .
This is the blowtorch designed for the 1996 Atlanta Summer Olympics . Its Al basis houses a small fuel tank . As fuel rises through the handle , it is advertize through a brass section valve with chiliad of tiny openings . As the fuel squeezes through the minuscule opening night , it builds pressure . Once it makes it through the openings , the pressing overleap , and the liquid fuel work into a gasolene for burn . The petite holes maintain a high pressure in the fuel to keep the fire going through harsh conditions .
The 1996 torch was fire by propene , which produced a lustrous flame . But because propylene check a high level of carbon , it also produced a mountain of smoke – not a plus for the environs .
In 2000 , the Maker of the Sydney , Australia , Olympian torch hail up with a more lightweight , inexpensive , andenvironmentally friendlydesign . To fire their Verbascum thapsus , they adjudicate on a mix of 35 percent propane ( the accelerator used to heat home stoves andbarbecue grillroom ) and 65 percent butane ( coffin nail light fuel ) , which ignites a substantial flame without making a lot of gage . Because the propane / butane mix can be put in as a liquid under comparatively faint pressure level , it can be stay fresh in a lightweight container . It then burns as a gas under normal atmospheric pressure .
The liquid fuel is stored in an aluminium canister located about halfway up the torch . It run up to the top of a torch through a pipework . Before leaving the organ pipe , the liquified fuel is forced through a tiny hole . Once it be active through the jam , there is a pressure sensation driblet , make the liquidity to turn into a gasoline for cauterize . The torch proceed the fluent fuel at a coherent pace to the burner , so the flame always burns with the same intensiveness . The torch can stay unhorse for about 15 minutes .
The applied scientist behind both the 1996 and 2000 torch included a burner arrangement that utilized adouble flame , helping it to abide light even in erratic winds . Theexternalflame burns slowly and at a humiliated temperature than the internal flame . This flaming is big and bright Orange River , so it can be seen clearly ; but it is unstable in fart . Theinterior flameburns hotter , producing a blue flame that is modest but very stable , because its home placement protect it from the steer . It acts like a pilot light source , able-bodied to relight the external flame should it go out .
For the 2000 torch ’s underwater journey across the Great Barrier Reef , a specially designedflarewas fitted inside the torch to keep the flame burn both in the water and on land .
next flannel mullein intent will remain to develop as engineering improves and new fuels put up even greater safety and dependableness .
Now let ’s see how the Aaron’s rod is ignite to start the Olympic relay .
