Playing animation frame by frame depending on speed (time)

Hello everyone! I've checked the related posts to my question and the manual, but I wasn't able to find any suitable examples on how to implement my functionality.

I have an object that moves at a player controlled speed (determined via keypressed time). This object has a piece that moves closer or further away, depending on the current speed (imagine a moving rear wing like on a Porsche or on a Veyron). I can control the movement, count/keep speed and trigger the animation start without any problems.

However I feel that the whole thing would look and feel a lot better if the animation's playback rate would depend on the current speed, a bit like this:

-if speed > x, begin playback of n frames (just to start the movement) -while speed is increasing (and up to a limit of y), for each x seconds, play n frames (would raise the wing more smoothly) -if speed is reducing (and up to the lowest boundary of 0) for each x seconds, rewind n frames (would lower the wing smoothly) -if speed falls radically fast or a big collision occurs, may play a preset animation of the wing lowering (since no speed is applied here)

So, I can't seem to find a implementation example of frame-by-frame playback, pause and rewind on the docs and here on the forum...Can anyone give me some pointers about this? Thanks in advance guys!

Best Regards,

-RG