The details in this engine are 40% less compared to the analogical in power piston engines, the output power being 0,75% for every single revolution of the output shaft and with the piston engines being 0,25% for every revolution of the output shaft.
The rotary engine with unchangeable combustion chamber (RE w/t UCC) has the potential to replace all existing engines with internal combustion, even jet engines. The operation and fuel consumption is the same as with ICE but the power is like with the jet engines.
As there is no need to transform the reciprocating motion in rotating that engine is capable to maintain fast revolutions with insignificant vibrations. Rotor-piston engines have greater power at small volume of the chambers.
That engine with toroid shape of the rotor, together with the cylinders and pistons is very reliably balanced with 4 times less dimensions and 5-8 times less weight, compared to analogical in power conventional ICE and 1,5-3 times more economical than rotary ICE; the different shape of the combustion chamber and radically different manner to convert the combustion energy in mechanical one makes it unique when compared to rotary (Wankel) and (Otto) engines.
The elliptic shape has been evaded in order to maximum compaction of the chambers, attenuate the vibrations to the minimum and creating impulse with the required indicating pressure for necessary force without changing the impulse to the time of discharging burnt out gasses, possibility to regulate the values of compression, (directly impacting the thermodynamic COEFFICIENT OF EFFICIENCY), possibility to use all types of fuels including hydrogen, same instantly produced by the engine, motion of pistons along absolutely parallel to cylinder line, lack of gas distribution, less parts and mechanical vibrations, more combustion chambers collected in small place, great and uniform torque at low revolutions, exclusive uniformity of operating strokes (60 strokes for one revolution of rotor at 5 module engine and 1800-30000 rev. of the output shaft).
(Reference is made to one complete working cycle of conventional Internal Combustion Engine where it is being performed for two revolutions of the crank shaft).
At the analyses of the kinematics when transfer the forces to conventional ICE it proved that the major disadvantage of classic design with crank connecting rod (CCR) is the reduction of gas forces arm, jointly with reduction of the pressure after the middle of the operating stroke which is evaded with the rotary engine with unchangeable combustion chamber (RE w/t UCC)
Actually that is the greatest advantage which does not exist at all engines with internal combustion. The impact of the impulse created by the combusted fuel is preserved to the time of discharge of burnt out gasses and is not variable quantity. In point of view of the mechanical Coefficient of Efficiency at expansion it becomes unique.
At last it should be noted that through the invention a rotary-piston engine with internal combustion has been designed, which compared to Wankel’s engine does not perform whatever elliptical motion and has design advantages, including: optimum compaction of the operating chambers; greater inertial moment; less weight; more powerful; small size engine; good dynamic equilibrium; economical; automatic control of driving power-oriented to users in compliance with their requirements and as a result of that the fuel consumption can be selected in dependence of the situation; the engine is capable to operate by various types of fuel as well with hydrogen.


Power industry:
- to drive generators of various power; in view of the high Coefficient of Efficiency of the engine it can be operated by hydrogen, produced through electrolysis and immediately burn out. That provides the possibility to be located close to consumers, which results in low losses when transfer the electrical energy.
- ecologically clean and renewable energy source.
Motor industry:
- direct usage to drive motor vehicles or hybrid transmissions and electrically driven motor vehicles.
- for various types of aircraft with remote destinations and pilotless airplanes with prolonged flight time.
Various types of construction equipment:
- underground and surface excavators, bulldozers, and earth moving machines.
- ships, yachts and small boats.
- submarines, bathyscaphs and underwater robots with prolonged operation time, without need for external energy.
Various types of units:
- driving, compressors, pumps, ventilations in closed premises, that require increased requirements for explosion-risk and air cleanliness.