a rotary motor using pistons for providing a scalable and more efficient , higher speed engine with improved compression . the rotary motor using pistons includes a main housing having and interior , an inlet port in environmental communication with the interior of the housing , an outlet port in environmental communication with the interior of the housing , a spark plug port for receiving a spark plug also in environmental communication with the interior of the housing , a first plate coupled within the housing and rotatable within the interior of the housing , a second plate member coupled within the housing and rotatable within the interior of the housing , a plurality of pistons coupled to an associated one of the first or second plate members , a drive shaft coupled to one of the first or second plate members and extending out of the housing , and an anti - reverse clutch operationally coupled to the drive shaft .