AFM Section 5 or similar
Galleypower,
The AFM usually sets out the Approach Climb performance in the AFM under a heading like Supplementary Landing Data or similar.
It will quite specifically nominate the speed.
However, (and I haven't had the pleasure of the 145) I have not experienced an aeroplane where the GA speed is less than the planned approach speed for the applicable landing configuration, ie usually Vref + 5 to 10 knots, which approximates the V2 for the reduced flap used for GA and, more often than not, is very close to the Vref for the reduced flap setting.
Having said that, does the 145 give you computed speed targets or is it a manual task?
Stay Alive....