Aircraft with combination power plant
First Claim
1. An aircraft having in combination:
- a low profile highly streamlined fuselage having a wing comprising two sections respectively having fuel tanks disposed therein;
a nose mounted turboprop engine;
a tail mounted turbojet engine of relatively low horsepower in respect to said turboprop engine;
a fuel feed system common to both engines and including both a pressure pump and a stand-by pump;
a pair of main fuel feed lines leading respectively from said fuel tanks to the inlet sides of said pumps;
a pressure manifold directly connected between said engines;
fuel lines connecting the outlet sides of said pumps to said manifold;
said fuel system common to both engines including fluid flow equalizing means disposed between the opposite ends of said main fuel feed lines and said pressure and stand-by pumps; and
check valve means series connected between the outlet sides of said pumps and said manifold.
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Accused Products
Abstract
By employing in-line gas turbine power plants in the nose and tail of a low profile highly streamlined aircraft, twin engine reliability is obtained with only a single engine frontal area combined with the employment of strakes rather than pipes for the nose engine exhaust, excellent fuel economy is obtained. While a nose mounted turboprop serves as the main power supply, a tail mounted turbojet with only a small fraction of the turboprop horsepower provides a supplementary power source during take-off or optionally to enhance cruise performance. Should the turboprop fail in flight the turbojet is capable of taking over at a reduced cruising speed. A fuel system common to both engines offers additional safety features and an improved method for effecting proper trim with either or both engines operative.
57 Citations
6 Claims
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1. An aircraft having in combination:
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a low profile highly streamlined fuselage having a wing comprising two sections respectively having fuel tanks disposed therein; a nose mounted turboprop engine; a tail mounted turbojet engine of relatively low horsepower in respect to said turboprop engine; a fuel feed system common to both engines and including both a pressure pump and a stand-by pump; a pair of main fuel feed lines leading respectively from said fuel tanks to the inlet sides of said pumps; a pressure manifold directly connected between said engines; fuel lines connecting the outlet sides of said pumps to said manifold; said fuel system common to both engines including fluid flow equalizing means disposed between the opposite ends of said main fuel feed lines and said pressure and stand-by pumps; and check valve means series connected between the outlet sides of said pumps and said manifold. - View Dependent Claims (2, 3, 4)
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5. An aircraft having in combination:
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a low profile highly streamlined fuselage having a wing comprising two sections respectively having fuel tanks disposed therein; a nose mounted turboprop engine; a tail mounted tubojet engine of relatively low horsepower in respect to said turboprop engine; a fuel feed system common to both engines and including both a pressure pump and a stand-by pump; a pair of main fuel feed lines leading respectively from said fuel tanks to the inlet sides of said pumps; a pressure manifold directly connected between said engines; fuel lines connecting the outlet sides of said pumps to said manifold; and said pressure manifold leading from the outlet sides of said pumps to said engines through, respectively, shut-off valve means, filter means, and a flow meter. - View Dependent Claims (6)
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Specification