Servicing your aircraft normally takes a certain amount, requiring spending gold coins to complete that task instantly. Instead, advance the time on your device. Afterwards, set the time back to its correct value.
Slaloming
The game is a combination of racing and slaloming. Slaloming will not be as difficult if you familiarize yourself with the track. Get your plane through the blue side of the gate, and not the green side, without hitting a pylon to get a perfect rating. When you encounter the flat gates, keep your plane level.
Upgrades
Your first goal should be to upgrade your plane. Upgrades will allow you to fly faster and bank harder for a better chance of winning. You also have to complete races with a better time record to get better trophies.