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WOK appears to have mislaid his calculator, allow me to help with the maths! <img border="0" title="" alt="[Big Grin]" src="biggrin.gif" /> . .. .A typical Concorde approach attitude, on a 3° glideslope, at the target threshold speed, is around +10.5° PA. The vertical component of the thrust is therefore T x Sin10.5°, which comes out to 0.1822T.. .. .Thus around 18% of the total thrust used on approach is acting in a vertical direction.. .. .Coupled with a thrust line which is well below the C of G, providing a considerable nose up pitch, you can see that it is quite easy for the engines to "push you around" on final approach, an effect that must be anticipated and resisted.. .. .Likewise, with the drag being around double that of a subsonic aircraft of similar weight, this is definitely not the aircraft to get low and slow in.. .. .This doesn’t quite answer your question - which asked what percentage of the total lift is provided by the thrust - but that is a bit more difficult to work out. My guess, for what it’s worth, is that it would be a similar figure.