The sum of any set of consecutive odd numbers starting from 1 is a square, and the quantity that is squared is the count of odd numbers in the sum. The latter is easily seen to be a count of the form 1 + 2 + 3 + 4 + ...
shooting brake - another name for a station wagon. beach waggon, beach wagon, estate car, station waggon, station wagon, waggon, wagon - a car that has a long body and rear door with space behind rear seat.
Air brake (road vehicle) Truck air actuated disc brake. An air brake or, more formally, a compressed air brake system, is a type of friction brake for vehicles in which compressed air pressing on a piston is used to apply the pressure to the brake pad needed to stop the vehicle.