You should review the proposed operation very carefully before attempting to ‘stretch’ wet landing performance at LCY.
The airport history was that the original ungrooved concrete runway had to be cleaned regularly when jet traffic increased; this tended to ‘polish’ the surface and reduce the surface friction.
The runway had to be grooved to restore an acceptable level of friction (airport requirements), but grooves do not necessarily make a poor runway good. Concrete is a relatively poor surface when compared with asphalt, depending on the surface texture etc, etc, thus pushing performance limits might be unwise.
IIRC the UK CAA has issued ‘advice’ on grooved runways – basically no alleviation for wet? It may have been a FODCOM; anyone have a reference?
Providing that your steep approach landing clearance does not change the distances, you still should consider that there is a tendency to land long from a steep glidepath. The fixed distance markers (or equivalent) must be respected.
Also, consider crosswinds on a wet runway. LCY has some interesting gust effects, which could complicate directional control that may require more distance.
Last edited by safetypee; 16th Sep 2010 at 13:35.