1. Such a radial engine occupies little floor space.

2. This is a 5 cylinder radial engine that has the same displacement as the V-twin below.

3. In a radial engine all the cylinders are set in a circle and all point toward the center of the circle.

4. Oshkosh reverberated with the sound of 18 Wright Cyclone radial engines chattering away.

5. Surely not a rocket, she thought, then spotted the low-slung gondola with its attached propellers and radial engines.