US1294234A - Aeroplane. - Google Patents

Description

L. CAMMEN AEROPLANE.

APPLICATION FILED JAN. 12, WW.

Patented Feb. 11; 1919.

5 mua 11106 L 601m Xi @513 m @Uozvuuz 1/1 LEON CAMMEN, OF NEW YORK, N. Y,

AEROPLANE.

Application filed January 12, 1917.

To all whom it may concern:

Be it known that I, LEON GAMMEN, a citizen of the United States, and resident of the borough of Manhattan, in the city, county, and State of New York, have invented certain new and useful Improvements in Aeroplanes, of which the following is a specification.

This application, which is a companion case to my application Serial No. 135,551, is directed to means for silencing the exhaust of aeroplane'engines.

Taking advantage of the fact that an aeroplane engine is located usually in the forward part of the fuselage and that a mufller compartment may be provided in a rear portion of the fuselage, it is evident that a straight ath of travel for the exhaust gases is available, of such extent as to allow these gases to become considerably cooled and reduced in pressure before reaching the mufier device. I

Thus 1 may employ a connecting pipe whose sectional area exceeds that of the exhaust manifold. This pipe may be wholly or in part exposed along the side of the fuselage, to afl'ord a large cooling surface, and may increase in its sectional area toward the mufier compartment.

By these means, i. e. length of passage, and increasing sectional area of the exhaust pipe, the velocity of the gases may be so reduced as to set up only a negligible amount of back pressure with any form of muffler device employed.

The muffler itself may be of any desired character to retard the flow of the exhaust gases before passing to the atmosphere.

In the drawing Figure 1 is a plan View of an aeroplane, the supporting wings being broken away.

Fig. 2 is a side elevation of a portion of the fuselage, and I Fig. 3 is a detail view, enlarged, of a portion of the exhaust pipe, showing its con nection with the muifier.

in said views the numeral 1 indicates the body portion or fuselage of the aeroplane, having the supportin wings 2. Numeral 3 indicates the engine, ocated in the forward portion of the fuselage, and 4 indicates a mutller located in the rear inclosed portion of the fuselage, being thus separated by a considerable distance from the engine.

The engine manifold 5 communicates with an exhaust pipe or duct 6, whose transverse Specification of Letters Patent.

Patented Feb. 11, 1919.

Serial No. 141,938.

or sectional area exceeds that of'the manifold so as to allow the exhaust gases entering said pipe to immediately expand, whereby the velocity of the exhaust gases is reduced, said pipe 6 communicating at its 0pposite end with an enlarged chamber 7 which tion of the atmosphere for cooling purposes,

to thus present a relatively large radiating surface. The particular function of the chamber 7 in its enlarged sectional capacity, is that it may produce a fall in pressure of the exhaust gases, greater than the subsequent rise in pressure induced by the muflier with relation to said gases.

1 claim 2- 1. The combination, in an aeroplane having a fuselage,of an engine and a muffler distantly separated within said fuselage, and a substantially straight line interconnecting pipe, whose sectional area exceeds that of the exhaust manifold with which it connects, to the extent of permitting a fall in pressure in the traversing gases greater than the subsequent rise in pressure therein induced by the muffler.

2. The combination, in an aeroplane having a fuselage, of an engine and a muffler distantly separated within said fuselage, and a substantially straight line interconnecting pipe arranged to permit radiation therefrom, the sectional area of said pipe exceeding that of the exhaust manifold with which it connects, to the extent of permitting a fall in pressure in the traversing gases greater than the subsequent rise in pressure therein induced by the muffler.

3. The combination, in an aeroplane having a fuselage, of an engine and a muflier distantly separated within said fuselage, and a substantially straight line interconnecting pipe, lying partly exposed alongthe side of the fuselage for heat radiation, the sectional area of said pipe exceeding that of the exhaust manifold with which it connects, to the extent of permitting a fall in pressure in the traversing gases greater than the subsequent rise in pressure therein induced by the muflier.

4C. The combination, in an aeroplane having a central longitudinal body, said body havin a motor in its forward portion and a muEer inclosed within its rear portion, of an exhaust pipe of enlarged, flattened section, extending from said motor to said muflier, and lying against the side of the fuselage, the sectional area of said pipe exceedin that of the exhaust manifoldwith which 1t connects, to the extent of permitting a fall in pressure in the traversing gases greater than the subsequent rise in pressure therein induced by the mufiier.

5. The combination, with an engine and a muflier distantly separated therefrom, of a communicating passage, exposed to radiation between the engine manifold and said mufl'ler, the sectional area of said passage, which exceeds that of the manifold, and its length, characterized as permitting, through heat losses and expansion, a fall in pressure of the exhaust gases, greater than the subsequent rise in pressure induced by the muffler, with relation to said gases.

ing a fuselage, of an engine,'a mufiier mea er.

6. The combination, in an aeroplane heav 1stantly separated from said engine and inclosed within said fuselage, and. a substantially straight line interconnecting passage, the sectional area of said passage exceeding that of theexhaust manifold with which .it connects, to the extent of permitting afall in pressure in the traversing gases greater than the subsequent rise in pressure therein" induced by the mufier.

. 7. The combination, in an aeroplane having a fuselage, of an engine, a muflier distant ly separated from said engine and inclosed within said fuselage, a passage extending from said engine toward said muffler, and a chamber of greater sectional area than said passage, connecting said passage and muffler, said passage and chamber being in substantially straight line communication with said engine.

Signed at the borough of Manhattan in the city, county\and State of New Ybrk this 10th day of January A. D. 1916.

' LEON CAMMEN.

Witnesses:

' F. W. BARKER,

WM. E. BULLOCK.

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