Interesting thread. On the Dash8(100 / 300) a Wet V1 is something actually used when runway is wet - NOT contaminated - and distance limited (Supplement 51 AFM). The problem of Vmcg is addressed by a minimum V1 (.9Vr). Once the Wet V1 is calculated and found to be below .9Vr, you must use the .9Vr speed and go back into the performance charts as your ASD increases.
There is no allowance for use of reverse when using the Wet V1. With an engine failure after Wet V1 but before Vr you simply try to keep it on centreline and keep going - and believe me if you tried to stop and applied max reverse on the live engine you are going off the side of the runway.
An interesting note here - we seldom use a Wet V1, but when we got Supplement approval, we started training for it in the sim. The hardest part was for the crew to keep going. Invariably someone closed the power levers with very interesting results and an even more interesting de-brief.
