The Dash-8-300 has a supplement that allows a flap zero take-off. The aircraft itself has a small modification (a switch) that tells the take-off configuration warning that a flap zero take-off is to be undertaken, part of the after start checklist. This selection resets itself automatically with weight off wheels. Like the F-27 it improves second segment for hot and high conditions. The runway obviously has to be pretty long as the rotate speeds are in the region of 140KIAS. Pretty fast for a Dash-8!