Patent ID: 8468829

Claim:
An engine for providing motion comprising: a casing with a forward terminal end and a rearward terminal end, the casing having a hollow interior defined by a bore that has an axis of symmetry, the bore extending continuously along the axis from the forward end to the rearward end, the bore including a flow constriction at a location between the forward end and the rearward end; a center body positioned within the bore and sized such that the bore is not completely obstructed at any point between the forward end and the rearward end, the center body including a forward hub, a middle hub, and a rearward hub, the middle hub being flanked by the forward hub and the rearward hub, wherein the forward hub and the rearward hub are connected to each other by a rod extending rotationally freely through the middle hub whereby the forward hub and the rearward hub are configured to rotate in unison while the middle hub remains rotationally stationary; a forward fan attached to the forward hub; a rearward fan attached to the rearward hub, wherein the rearward fan is configured to drive the forward fan, and the forward fan is configured to draw air from outside the casing into the bore, the forward fan, rearward fan, and bore being configured in relation to each other such that air drawn into the casing is propelled through the bore in a continuous stream from the forward end to the rearward end; a plurality of support elements, each support element being connected to the casing at a first portion of the support element, and to the middle hub at a second portion of the support element, the support elements being collectively configured to support the middle hub in relation to the casing; at least one delivery tube extending from a first location outside the casing to a second location in the bore of the casing, the delivery tube being configured to deliver liquid nitrogen from the first location to the second location.