YORKSHIRE Air Ambulance is gambling on a new lottery to boost its income.
And officials hope to add one or two more helicopters to their fleet if the game takes off.
BBC Look North presenter Harry Gration, who is the charity's chairman, officially launched the lottery at the charity's office at Dean Clough mills, Halifax.
The air ambulance costs £1m a year to run. One of the patients to have benefited from it is Golcar schoolboy Marc Jackson, who was crushed by a bus in Milnsbridge in April last year.
Marc, of Marina Terrace, was 14 at the time when he was airlifted to St James's Hospital, Leeds, where surgeons repaired his smashed pelvis, broken leg and treated his internal injuries.
The YAA lottery costs £1 a week to enter and is based on the national Lotto game.
People pick three numbers, which have to match three of the six numbers drawn in the six main numbers in the Saturday draw.
Carol Taylor, YAA Lottery area manager, said: "It could not be easier to play and there is the chance for people to receive a windfall, while helping a truly worthwhile cause.
"Organisations in other parts of the country have funded up to three helicopters through their lotteries alone."
Prize money will depend on the number of people who play the game.
Some punters have already signed up, with the first prize winner receiving £612 in the draw on September 6.
People can play by filling in a form and paying by cheque or setting up a direct debit.
Shops are also wanted to provide entry forms.
Any individuals or businesses willing to offer the forms, should ring 0845 120 1843.