I have been thinking about this and wanted to ask and see if anyone else may know an answer. I have had all kinds of planes, jets, warbirds, civilian etc. and pretty much any plane that had flaps I used them, with two settings, Take off, and landing, landing being considerably more to slow down the plane. However on my newest jet, the Carf classic lightning the flaps are different, its a traditional flap on the bottom with what I would call an airbrake/spoiler on top of the wing. I have no problems with the plane it takes off flies and lands like a dream. My question is in regards to take off flaps, aerodynamically would the airbrake on top of the wing counter the lift the lower flap is generating. I have taken off with and without flaps didnt really notice a difference, but it got me thinking, is it beneficial to use this style of flap on a take off, do they actually help with a shorter rollout and get the plane flying quicker?