US1409241A - Aeroplane - Google Patents

Description

l. B.. SANDERS.

AEROPLANE.

APPLICATION FILED FEB.I9,'I921.

.- 41 Patented Mar-14,1922.

. awwwkvz PATENT OFFICE.

IRA B. SANDERS, OF FORT WORTH, TEXAS.

i AEROPLANE.

Application filed February 19, 1921.

To all whom it may concern Be it known that I, IRA B. SANDERS, a citizen of the United States of America, residing at Fort Worth, in the county of Tarrant and State of Texas, have invented certain new and useful Improvements in Aeroplanes, of which the following is a specification.

My invention relates to aeroplanes and more particularly to planes adapted for gliding for hours without the aid of the motor and which embodies a new principle of aeronautics together with the principles of the aeroplanes now in use, the new principle relating to planes set at difierent angles from the ordinary planes and set at zero angle relative to direction of travel; and the object is to provide aeroplanes which will fill the requirements of a practical, more dependable commercial machine, more economical, adapted for safe passenger, mail, and express service, and more especially to provide an aeroplane which is adapted for slow and safe landings and to utilize the same natural fo-rces,wind. gravity, momentum, and velocity, that are utilized by certain large birds, such as the American eagle and the common blizzard. These birds spread their wings, and without flopping the wings. they can soar and soar and rise higher and higher, and then travel for hours with only natural forces to sustain them. Other objects and advantages will be fully explained in the following description and the invention will be more particularly pointed out in the claim.

Reference is had to the accompanying drawings which form a part of this application.

Fig. 1 is a side elevation of the improved aeroplane. Fig. 2 is a front elevation of the same.

Similar characters of reference are used to indicate the same parts throughout the several views.

The aeroplane shown herein has a body 1 which is provided with. doors and windows or port holes 2. Lifting planes of the usual curved type are mounted on the body 1 in the ordinary way. Theaeroplane is provided with propellers of ordinary type for driving the machine and is provided with an ordinary rudder and tail piece.

Specification of Letters Patent.

Patented Mar. 14, 1922'.

Serial No. 446,252.

In addition to the curved lifting planes above described, inclined planes 3 and 4 are attached to the body 1 near the lower part and attached at their upper and outer ends to another plane The planes 3 and 4 are set at an angle of zero relative to the direction of travel. The member 5 is also a horizontal member of zero angle attached to the top of the aeroplane for soaring or floating purposes.

In operation, the lifting planes and rudders operate as such devices operate in aeroplanes now in use. The soaring planes are for use after the desired height has been reached. The soaring planes are set at zero angle or no lift or no resistance or an absolute plane with the direction of travel when ascending. After the required height has been reached, the engines may be cut off or slowed down. All planes of no angle or zero anglewill come into effect against the pull of gravitation and will sustain the aeroplane in the air without the aid of the motor, in a manner similar to the soaring of large birds which can soar for hours without flopping their wings. The rudder can then be used to make the entire machine turn all the planes slightly downward and under these conditions, the pull of gravity will carry the aeroplane long distances without the aid of the motor, the aeroplane being sustained by means of the additional zero angle planes which operate on the parachute principle and effect slow and safe landings. The automatic stabilizing effect is obtained by the four inclined planes 3 and 4. the principal part of the weight being below the center of gravity of the machine.

Vhat I claim, is,-

In an aeroplane provided with curved lifting planes and body.- sustaining planes consisting of a horizontal plane above said lifting planes attached to said body and of planes set at an angle relative to said lifting planes attached to said body and to said horizontal plane, all of the last named planes except the lifting planes being set at an angle of zero relative to the direction of travel.

In testimony whereof, I set my hand, this 15th day of February, 1921.

IRA B. SANDERS.

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