A remote controlled helicopter of a single rotor type to be used indoors, having a flying operation that can be stabilized and operability that can be improved. The sole and crown part of the body are cast thinner than most other club heads to promote deformation when striking a golf ball. The data sources also may be federated. A silicide is formed on the sourcedrain junctions and on the gate. The method includes a step of producing a product gas by reaction containing a conjugated diolefin by feeding a hydrocarbon containing a monoolefin having 4 or more carbon atoms and oxygen to a reactor accommodated with a catalyst containing a metal oxide and a carrier, and a step of sending the product gas by reaction to a quenching tower and washing with a quenching agent.