Object to accelerate along path

Support Animation and Rigging
1

I know how to make an object move along a path (at an even speed) but does anyone know if there’s a way to make an object accelerate or deccelerate or even back-track along a path over time?

2

http://uploader.polorix.net//files/111/FlighPathRev.blend

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3

Thanks Fligh, great.