We have received two advertisements of a 70 HP rotary engine built in the UK.

“Two Paradox ads”

-As we can read they gave 70 HP and had rotating cylinders inside a frame.

-All valves were controlled mechanically.

From Appendix 12: Charles Deissner made an air-cooled, 4-cylinder, 4-stroke 30 HP rotary that he put into a chassis.

“Schematic drawing of Charles Deissner's 30 hp engine”

-For each engine rotation the propeller rotated twice in the same direction.

“Photo of the 30 HP on chassis"

“Charles Deissner with a running 30 hp rotary engine”

-This engine has the output shafts on both sides with one of them off-center.

-The ongoing test is to demonstrate stability.

-The larger 70 hp model has already been marketed, as we see in the ad below.

“Paradox ad in a magazine”

"Attempt to clarify the design"

-There is information that Paradox also offered another 100 HP motor. Although we only have obvious photographs of the construction of the 30 HP engine.