Multicopter with different purpose propellers

A method of operating a flying machine, comprising:

• causing spinning of at least two lifting propellers mounted to a chassis, the at least two lifting propellers generating a vertical thrust;
• causing spinning of at least two control propellers, each with individual electric motors mounted to the chassis, the at least two control propellers generating a horizontal thrust;
• wherein the at least two lifting propellers and the at least two control propellers are coplanar or in parallel planes as mounted on the chassis;
• controlling the spinning of the controlling propellers by an onboard computer mounted to the chassis, the controlling comprising varying the spinning of the at least two control propellers more frequently than varying the spinning of the at least two lifting propellers.

A multicopter system comprising:

• a chassis supporting:
• at least two internal combustion lift engines mounted on the chassis, each of the engines connected to a lift propeller configured to generate a vertical thrust, and
• at least four electric control motors mounted on the chassis, each of the control motors connected to a control propeller configured to generate a horizontal thrust,
• wherein the lift propellers and the control propellers are configured to spin in a single or parallel planes relative to the chassis;
• wherein the lift propellers are at least twice as long as the control propellers;
• and
• a computer mounted on the chassis, the computer in communication with the at least two lift engines and the at least four control motors, and configured to control the spin rates of the lift propellers and the control propellers, the computer further configured to vary spin rates of the lift propellers less frequently than spin rates of the control propellers.