Whilst engine anti ice might not degrade the takeoff performance by any significant amount, reduced runway braking action could have a far greater effect.
First reaction to a runway condition report with a caveat 'wet with ...' is to treat it like 'slippery when wet' which reduces the braking action.
Does anyone have information on the effect of runway deicing fluid on braking action; considering different runway surfaces, or fluid on top of rubber deposits?
Wet, not standing water or flooded, is considered as a single category. However, there is a significant variation in braking action within the wet category depending on water depth (<3mm), and the runway surface and maintenance condition.
Consider 2.9mm water, or 0.01mu above the maintenance level, how might de icing fluid affect these aspects.
Also, in many documents water is discussed as a 'contaminant', but not significant for performance <3mm.
Runway deicing fluid is a 'contaminant', thus requires additional consideration.