Patent ID: 11867487
Assignee: nan
Field: Other special machines (Mechanical engineering)
Classification: CPC F | IPC F

Claim 2:
3. A projectile comprising:
a gas channel extending from a gas inlet that is disposed at a trailing end of the projectile to a gas outlet that is disposed at a leading end of the projectile; and
a helical pair comprising a piston that is disposed in the gas channel, the piston comprising a rotor,
wherein the projectile is configured to operate in each of a first mode, a second mode, and a third mode,
wherein the first mode comprises the rotor disposed in a rearward position of the gas channel,
wherein the second mode comprises the rotor rotating while expanding propellant gas drives the rotor forward in the gas channel, and
wherein the third mode comprises the rotor spinning freely, supported by a gas bearing, and disposed in a forward position of the gas channel.