How far can you go?

[Asaman]

Without ever using engine / booster.

Yup, you heard me right. No sources of motion. Stock parts only.

Here is my first try. It ended due to me making too sharp turn (was trying to evade water).

[cardgame]

So... ornithopters? Essentially unlimited range, the only thing that would stop you from infinite distance is boredom or time...