Palmerston North Rescue Helicopter pilot Graeme Speirs and base manager and pilot Chris Moody with the twin engine helicopter.

Hundreds of acute and often far-flung patients have benefited from the Palmerston North Rescue Helicopter's reach.

The nationwide Westpac Chopper Appeal starts on Friday, raising money to support the operation of the 16 regional rescue helicopters throughout New Zealand.

The Palmerston North Rescue Helicopter has served the Manawatu-Whanganui region for 23 years, saving hundred of lives.

Pilot Chris Moody has appealed for donors to give generously during Friday's street appeal.

"We cover the Whanganui and Manawatu regions. That's a large geographical area and a long trip by road to hospital," Moody said.

In 2015 the chopper was used to rescue 270 individuals.

"Without the chopper the outcomes may have been bleak."

Last year the Phillips Helicopter Trust upgraded to a new custom helicopter, costing $3.6 million, funded by borrowings, reserves, specific bequests and a range of community grants.

Terrace End Westpac personal manager Katelin Rigby said staff would be collecting in The Plaza, with others operating around the CBD.

All money raised in Palmerston North would go to the local helicopter, she said.

There will also be a quiz night at the Manawatu Golf Club toward the end of May. Tickets would be sold at Westpac banks in Palmerston North until May 20.

"Last year was really successful, with raffles throughout."