US3893638A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dual cycle fan jet engine for stol aircraft with augmentor wings
Assignee: Boeing Co
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Filing: 1974-02-14
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Granted: 1975-07-08
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Expires: 1994-02-14
Abstract
Abstract A dual cycle fan jet engine suitable for use in STOL aircraft with augmentor wings is disclosed. In a cruise mode of operation, primary air and fan air from a fan jet engine are axially exhausted rearwardly in a conventional manner. In an augmentor mode of operation, the primary air is diverted by valves through an augmentor turbine where it is expanded and exhausted at a relatively low velocity, and the fan air is diverted by valves through an augmentor compressor driven by the augmentor turbine. The supercharged output of the augmentor compressor is directed via wing ducting to the augmentor flaps of the associated augmentor wing.
Inventors
- 👤 George S Kelley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:14
CPC Classifications
B; B64; B64C; B64C15/00
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
263 words
A dual cycle fan jet engine suitable for use in a STOL aircraft having ducted augmentor wings, said dual cycle fan jet engine comprising: a fan jet engine adapted to generate primary air and fan air; air driven means for extracting energy from airflow and generating mechanical power in accordance therewith; air compression means for compressing air, said air compression means connected to said air driven means so as to be powered by the mechanical power generated by said air driven means; a horizontal duct extending rearwardly from the primary air outlet of said fan jet engine; a nacelle surrounding said fan jet engine and said horizontal duct for directing the fan air from said fan jet engine about said horizontal duct; a first vertical duct connecting said horizontal duct to the inlet of said air driven means; a second vertical duct connecting said nacelle to the inlet of said air compression means; a first valve located in said horizontal duct, said first vertical duct being located between the rear of said fan jet engine and said first valve; a second valve surrounding said horizontal duct, said second vertical duct being located between said fan jet engine and said second valve; a third valve located in said first vertical duct between said horizontal duct and the inlet of said air driven means; and, a fourth valve, located on the side of said air compression means remote from the side where said air compression means receives said fan air, for controlling the flow of fan air from said nacelle to said air compression means.
Claim 2
Dependent Claim
263 words
A dual cycle fan jet engine suitable for use in a STOL aircraft having ducted augmentor wings, said dual cycle fan jet engine comprising: a fan jet engine adapted to generate primary air and fan air; air driven means for extracting energy from airflow and generating mechanical power in accordance therewith; air compression means for compressing air, said air compression means connected to said air driven means so as to be powered by the mechanical power generated by said air driven means; a horizontal duct extending rearwardly from the primary air outlet of said fan jet engine; a nacelle surrounding said fan jet engine and said horizontal duct for directing the fan air from said fan jet engine about said horizontal duct; a first vertical duct connecting said horizontal duct to the inlet of said air driven means; a second vertical duct connecting said nacelle to the inlet of said air compression means; a first valve located in said horizontal duct, said first vertical duct being located between the rear of said fan jet engine and said first valve; a second valve surrounding said horizontal duct, said second vertical duct being located between said fan jet engine and said second valve; a third valve located in said first vertical duct between said horizontal duct and the inlet of said air driven means; and, a fourth valve, located on the side of said air compression means remote from the side where said air compression means receives said fan air, for controlling the flow of fan air from said nacelle to said air compression means.
Claim 3
Dependent Claim
34 words
A dual cycle fan jet engine as claimed in claim 1, wherein said first vertical duct is located beneath said horizontal duct and wherein said second vertical duct is located above said horizontal duct.
Claim 4
Dependent Claim
30 words
A dual cycle fan jet engine as claimed in claim 2, wherein said air driven means comprises an air turbine and wherein said air compression means comprises an air compressor.
Claim 5
Dependent Claim
30 words
A dual cycle fan jet engine as claimed in claim 1, wherein said air driven means comprises an air turbine and wherein said air compression means comprises an air compressor.
Claim 6
Dependent Claim
251 words
In a STOL aircraft including ducted augmentor wings adapted to direct air energized by a jet engine to augmentor flaps, said augmentor flaps adapted to direct said air generally downwardly and, thereby, augment the lift provided by the aerodynamic shape of the wings of said STOL aircraft, the improvement comprising a dual cycle fan jet engine comprising: a fan jet engine adapted to generate primary air and fan air; air driven means for extracting energy from air flow and generating power in accordance therewith, said air driven means having an inlet in communication with the primary air of said fan jet engine; air compression means for compressing air, said air compression means connected to said air driven means so as to be powered by the power generated by said air driven means and said air compression means having an outlet in communication with the duct of one of said ducted augmentor wings of said STOL aircraft; duct means, mounted between the rear of said fan jet engine, said air driven means and said air compression means, for ducting primary air from said fan jet engine between an axial exhaust and said air driven means, and for ducting fan air from said fan jet engine between an axial exhaust and said air compression means; and, control means for selectively controlling the flow of primary air between said axial exhaust and said air driven means, and for selectively controlling the flow of fan air between said axial exhaust and said air compression means.
Claim 7
Dependent Claim
251 words
In a STOL aircraft including ducted augmentor wings adapted to direct air energized by a jet engine to augmentor flaps, said augmentor flaps adapted to direct said air generally downwardly and, thereby, augment the lift provided by the aerodynamic shape of the wings of said STOL aircraft, the improvement comprising a dual cycle fan jet engine comprising: a fan jet engine adapted to generate primary air and fan air; air driven means for extracting energy from air flow and generating power in accordance therewith, said air driven means having an inlet in communication with the primary air of said fan jet engine; air compression means for compressing air, said air compression means connected to said air driven means so as to be powered by the power generated by said air driven means and said air compression means having an outlet in communication with the duct of one of said ducted augmentor wings of said STOL aircraft; duct means, mounted between the rear of said fan jet engine, said air driven means and said air compression means, for ducting primary air from said fan jet engine between an axial exhaust and said air driven means, and for ducting fan air from said fan jet engine between an axial exhaust and said air compression means; and, control means for selectively controlling the flow of primary air between said axial exhaust and said air driven means, and for selectively controlling the flow of fan air between said axial exhaust and said air compression means.
Claim 8
Dependent Claim
52 words
The improvement claimed in claim 5 wherein said air driven means comprises an air turbine and wherein said air compressioN means comprises an air compressor, the shaft of said air turbine being connected to the shaft of said air compressor so that said air compressor is mechanically powered by said air turbine.
Claim 9
Dependent Claim
84 words
The improvement claimed in claim 5 wherein said duct means comprises: a horizontal duct extending rearwardly from the primary air outlet of said fan jet engine; a nacelle surrounding said fan jet engine and said horizontal duct for directing the fan air from said fan jet engine about said horizontal duct; a first vertical duct connecting said horizontal duct to the inlet of said air driven means; and, a second vertical duct connecting said nacelle to the air inlet of said air compression means.
Claim 10
Dependent Claim
103 words
The improvement claimed in claim 7 wherein said control means comprises: a first valve located in said horizontal duct, said first vertical duct being located between the rear of said fan jet engine and said first valve; a second valve surrounding said horizontal duct, said second vertical duct being located between said fan jet engine and said second valve; a third valve mounted so as to control the flow of primary air from said horizontal duct to said air driven means; and, a fourth valve mounted so as to control the flow of air from said horizontal duct to said air compression means.
Claim 11
Dependent Claim
45 words
The improvement claimed in claim 8 wherein said third valve is located in said first vertical duct between said horizontal duct and the inlet of said air driven means; and, wherein said fourth valve is located on the outlet side of said air compression means.
Claim 12
Dependent Claim
29 words
The improvement claimed in claim 9 wherein said first vertical duct is located beneath said horizontal duct and wherein said second vertical duct is located above said horizontal duct.
Claim 13
Dependent Claim
51 words
The improvement claimed in claim 10 wherein said air driven means comprises an air turbine wherein said air compression means comprises an air compressor, the shaft of said air turbine being connected to the shaft of said air compressor so that said air compressor is mechanically powered by said air turbine.
References Cited (Backward Citations)
US3023860A
Cited
US3108767A
Cited
US3223355A
Cited
US3318095A
Cited
US3368778A
Cited
US3375996A
Cited
US3761042A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-07-07 | 1979-01-06 | 1979-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-07 | 1983-01-06 | 1983-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-07 | 1987-01-06 | 1987-07-08 | $7700.00 | Window Closed / Lapsed |