Abstract: A ball bat may include a handle portion and a barrel portion extending away from the handle portion to an end cap. The barrel portion has an outer wall formed from aluminum and includes at least two and no greater than four inwardly projecting circumferential humps spaced by intervening circumferential valleys.

Abstract: Portable energy generation systems are disclosed. More particularly, a high-output mobile electrical generator system comprising a radial engine power source providing a highly compact physical format.

Abstract: A radial engine lubrication device is disclosed. The device includes at least one lubricant supply pump and a crankcase. The crankcase has a first cavity and a second cavity. The device includes a first flow path extending through at least one master rod of a rotating assembly. The lubricant is supplied from the lubricant supply pump, through the first flow path and exits into the first cavity. A second flow path extends internally through at least one wall of the crankcase and the device further includes at least one scupper extending into the first cavity and fluidly connecting the first cavity with the second cavity.