Propeller motor group for UAV based on 28 cm3 2.94 kW M-8 single-cylinder calibre 2.94 kW engine with flight altitude not more t

The composition of the VMG: high-efficiency low-noise two-blade air propeller - 21/7 (diameter/step in inches) with a thrust of at least 50 N at 7250 rpm; brushless starter-generator up to 750 W with the appropriate electronic controller; single-cylinder air-cooled calibre engine with a DIN power of at least 4 hp. (2.94 kW) at 7500 rpm, cylinder diameter 34 mm, piston stroke 31 mm, purge scheme three-channel, disc spool; mechanical or electric fuel pump, reducing and check valves, fuel line; caliche plug with a seating diameter of 12.7 mm; air filter for operation in difficult and dusty places of application; silencer-resonator exhaust system to ensure a minimum level of acoustic noise. The engine may be operated without starter-generator, silencer-resonator, air filter, with 22/8, 20/8 and 18/8 type air screws and a centre bore diameter of 12 mm. Methyl alcohol based fuel