Accession Number:

ADD002277

Title:

Ducted Rockets.

Descriptive Note:

Patent Application,

Corporate Author:

DEPARTMENT OF THE NAVY WASHINGTON D C

Personal Author(s):

• Schadow,Klause C.

Report Date:

1976-01-12

Pagination or Media Count:

8.0

Abstract:

The patent application relates to a method whereby the overall efficiency of a reaction engine having primary and secondary combustion chambers is greatly improved by reducing the primary exhaust velocity to subsonic speed. This is accomplished in a preferred embodiment by using an exhaust tube downstream of the primary nozzle. A tube diameter of about six times that of the primary throat diameter and a tube length of about five to ten times that of the tube diameter is considered optimum.

Descriptors:

• *Ducted rockets
• *Combustion chambers
• Secondary emission
• Ramjet engines
• Rocket nozzles
• Solid propellant rocket engines
• Patents

Subject Categories:

• Jet and Gas Turbine Engines
• Solid Propellant Rocket Engines

Distribution Statement:

APPROVED FOR PUBLIC RELEASE