Power plants – Reaction motor – Interrelated reaction motors
Reexamination Certificate
2001-01-22
2003-01-21
Koczo, Michael (Department: 3746)
Power plants
Reaction motor
Interrelated reaction motors
C060S232000, C060S263000
Reexamination Certificate
active
06508055
ABSTRACT:
CROSS REFERENCE TO RELATED APPLICATIONS
Not Applicable
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT
Not Applicable
REFERENCE TO MICROFICHE APPENDIX
Not Applicable
BACKGROUND OF THE INVENTION
This invention relates to a variable mode, turbofan, turbojet, ramjet type jet engine, which is also suitable for short takeoff vertical landing, STOVL. Jet engines are normally built in fixed mode either as turbofans, turbojets or ramjets, this invention sets out to combine all types of engine, plus inclusion of STOVL capability.
BRIEF SUMMARY OF THE INVENTION
According to the present invention there is provided a jet engine comprising of a complete low bypass turbofan unit to the rear, including a secondary fan unit and engine core comprising of compressor, combustion chamber, turbines and secondary bypass duct. Some eight to thirteen feet ahead of which sits a larger diameter main fan unit, driven from the front of the turbofan via a long drive shaft. A center portion of the main fan feeds the secondary fan via a long central duct of roughly the same area as the secondary fan. The outer portion of the airflow from the main fan is ducted into a split exhaust plenum chamber immediately to the rear of the main fan. This chamber has forward mounted thrust-vectoring exhaust nozzles immediately attached to either side, and then each side feeds into variable area outer ducts, using hinged inner and outer doors on either side of the engine. These doors are arranged to split the thrust from the main fan, to exhaust either outwards for bypass or inwards forming a ram into the secondary fan. Both outer ducts then rejoin the long central duct downstream forming a second plenum chamber just ahead of the secondary fan. Between this second chamber and the secondary fan is fitted an in line intercooling device to cool down the incoming air charge.
REFERENCES:
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patent: 3160368 (1964-12-01), Young et al.
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patent: 3867813 (1975-02-01), Leibach
patent: 4050242 (1977-09-01), Dusa
patent: 4222233 (1980-09-01), Johnson et al.
patent: 4222234 (1980-09-01), Adamson
patent: 4248041 (1981-02-01), Wilde et al.
patent: 5553448 (1996-09-01), Farrell et al.
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