The fleet of five helicopters and two fixed-wing aircraft will be available to douse the flames in conjunction with local aircraft when required.

Tasmanian Fire Service chief officer Chris Arnol said the fleet was a critical component of the state's firefighting capabilities.

"Our aircraft will be responded to new fire starts as soon as they are reported to keep fires small until ground crews arrive," he said.

"Our aviation fleet will be located in Hobart and Launceston so we are able to move aircraft around quickly to respond to fires."

The McNeills Road fire, which was ignited by a lightning strike on December 2, has so far burned through 3305 hectares of land.

Fire crews used Wednesday's favourable weather conditions to continue backburning operations to bring a bushfire just outside Swansea under control.

Though the fire is yet to be contained, no properties have been under threat so far.

Residents have been warned of a significant increase of smoke over the next few days due to backburning operations.

Aircraft will continue to be used over the next few days in an effort to contain the fire.

Mr Arnol said Tasmania was well placed to deal with what could be a long summer ahead.

"We have already two total fire bans so far this year, before summer even arrived," he said.

"In October, we were dealing with over 20 fires.

"Summer in Tasmania means there will be fires.

"A lack of rainfall means vegetation is very dry, particularly through the East Coast and midlands."