Sanei made a few small friction toy airplanes. The DC-7 is not a scale model. There is a boxed set of three small airplanes with pilot wings. Two of the planes are identical to those marked “K” in a diamond: a red/black F-104 and a United airliner with swept wings. The third plane is a Douglas Sky Rocket.
A small toy airplane is flying in the xy-plane parallel to theground. In the time interval t = 0 to t = 1.00 s, its velocity as afunction of time is given by