SU51702A1 - Gasoline engine for aircraft models - Google Patents

Description

The proposed gasoline engine is designed to be installed on aircraft models with a wingspan of 2 to 2.5 meters and having a flight weight of 3-4 kg. In this engine, with conventional lubrication, carried out under the action of increasing pressure in the crank chamber, in order to facilitate the movement of oil through the bearing, the latter is connected by a pipe to the engine intake pipe.

In FIG. 1 shows a longitudinal section of a gasoline engine for aircraft models; FIG. 2- front view; FIG. 3 view it from above.

The light metal head / cylinder is screwed onto the steel sleeve 2. The ring 3 serves to lock the cylinder after it is wrapped in the crankcase 42. The light metal piston 4 enters the sleeve and moves up and down. The piston has three sealing rings with locks per square. The finger 29 is pressed tightly when assembled into a piston and secured with a cotter pin b. The connecting rod 7 of the I-section is provided with bushings 30 and 12 of phosphorous bronze pressed into it. The connecting rod bearings are lubricated through holes drilled in the heads.

The motor shaft is equipped with a crank 9 with a finger turned on cutting //, which has a square key hole in it. The flange on the finger holds the rod from the axial shifts. Finger in the wrapped state of the contrit with a tapered bolt 13.

The shaft is lubricated by circulating through the channels from the crankcase of the oil, which, under the influence of an increase in pressure in the crank chamber, when the piston moves down, is squeezed into the bearing, falls into the corresponding holes in the shaft body, and, filling its void, passes to the opposite wall bushings. The suction connecting tube 32, which leads from the crank chamber to the engine intake pipe, facilitates the movement of oil through the bearing, since a vacuum is created in the suction pipe to facilitate the movement of oil.

When the engine is running, the oil circulates automatically through the bearing, depending on the number of revolutions.

engine In addition, this device gives all the time the correct mode of operation of the engine at any speed. In a conventional two-stroke engine device, an accumulation of oil in the crankcase is observed, due to which the volume of the crankcase is disrupted, which causes the engine to change the mode of operation at a given throttle.

The motor shaft is hollowed out for relief. The counterweights of the shaft are carried out by pressing in lead plugs, which are opposed to aluminum, thus creating a weight difference and thereby balancing the entire system of the crank-piston device.

The propeller sleeve 22 is mounted on the cone of the shaft with a longitudinal key and is tightened with nuts 20 by a washer 19. The sleeve also serves as a pressing cam for the distributor lever.

The plug 10 serves to separate the shaft cavity from the crankcase. The interrupter is arranged as follows: a PCB bushing 41 is threaded to the crankcase neck and can rotate at an angle of about 70 °, which is fixed by a ball springer with a spring.

The contact release lever 23 is made of duralumin and has a fiber liner 18, which softens the blows of the interrupting cam.

The entire system is covered with a lid 28, in which contact 27 and a sleeve 43, which is used to isolate the chopper spring, and at the same time the second pole for the battery, are fastened. The cap is screwed with four screws 55 and thus protects the contact from contamination and moisture.

The engine is ignited from a small reel and pocket torch battery or special battery.

The carburetor engine is built on the float principle, and the amount of incoming fuel is automatically adjusted with the closing or opening of the throttle. The throttle valve has a cut-out, which includes a jet. The cut-out serves at the same time as a diffuser, which reduces the cross-section of the suction opening depending on its position. The cutout in the throttle valve can cover the jet from above, which violates the direction of the outflow of fuel, at the same time provides greater access to air, which, breaking through a smaller orifice with greater speed, gives more outflow, and the engine increases power

The subject matter of the invention.

The gasoline engine for models of lubricated airplanes, carried out under the effect of an increase in pressure in the crank chamber, characterized by the use of a tube 52 connecting the bearing to the suction pipe of the engine, in order to facilitate the movement of oil through the bearing.

to the author's certificate of V.P.Pylkov

 51702

3213

Figz

35 35

Fig2