My Monnet Moni had a ventral airbrake and opening it caused a marked nose up pitch, so on final I used to set airbrake open and rpm 4,500, which gave me about 60mph. I would shut the throttle over the hedge and fly it on ie no flare; I did this a couple of times and it dropped like a stone and I heard that several US designed homebuilts eg Quickie Q2 needed to be landed this way.