flying start 
noun
1A start of a race or time trial in which the starting point is passed at speed.Despite that, he got a flying start into the opening race and shot from ninth on the grid to fourth place at the first corner....
- World record holder Jackson false started to put himself under pressure but held his nerve to make a flying start and race away to claim his third title, having won in 1989 and 1994.
- Racing in the National Track Championships at the Velodrome, Glynis first took the 200m flying start record with 14.067s.
1.1A good beginning, especially one giving an advantage over competitors: the team got off to a flying start in last year’s rally...
- After attending drama school back in Dublin, Birthistle's career got off to a flying start with a role in the Irish television soap opera Glenroe, set in the Wicklow Mountains.
- Sligo's shopping spree has got off to a flying start with hundreds of shoppers availing of the many bargains in the participating stores throughout the town.
- The appeal got off to a flying start with a £500,000 anonymous donation in February, and funds at the beginning of May were £536,000.