Mid-West Engines Ltd manufactured Wankel type rotary piston engines based on Norton bodies.

-The most commercialized engines are the AE45R and AE90R.

“AE-45R”

-The AE45R is the original P80 model, it has a single Wankel-type rotor displacing 294 cc and delivers 40 HP at 6,000 rpm and 60 HP at 8,000 rpm. What is very important regarding its little displacement.

“AE45R, geared”

-Wankel engines offer little front area, low weight/power ratio and low levels of vibrations. They are used in ULM, RPV and Drones.

“AE50R”

-The AE50R rotary is called “Harrier”. It also has a displacement of 294 cc and gives 50 hp. There is a double rotor version of this engine, the AE110 “Hawk”, with 588 cc giving 105 HP.

-A better view of the Mid-West 90 hp two-body rotary engine.

“Mid-West de 90 HP”

-It has two Wankel-type rotary engine bodies and a generous front reduction gearbox.

“AE90R”

-The AE90R is the double version of the AE45R because it has two rotors instead of one, it displaces 588 cc and gives 90 hp at 7,000 rpm.

“AE90R, rear view”

-Both types, the 45 and 90, are cooled by liquid (water/glycol) plus some internal air currents. They have a double CD ignition system and RF protection and use Tillotson carburetors.

-Greasing is “partial loss”, so the oil pump is of the dosing type. Partial recovery can be achieved using an oil separator and a scavenge (recovery) pump.

-They can have an electric starter and an alternator.

“AE90R, front view”

-The rotation of the two aforementioned engines, viewed from the front, from the propeller plate, is clockwise for the AE90R as it has a superposed gearbox, and anticlockwise for the AE45R without gearbox.

“AE45R, front view”

-There is also a AE100 rotary with a power of 95 HP and a displacement of558 cc.

-By acquiring the “Hewland” it also has new engines, but these are already 2-stroke, alternative piston engines with double ignition.

“AE75”

-A classic, piston-type, three-cylinder engine.

“Mid-West AE-75”

-The AE75 is a three-cylinder with a displacement of 740 cc giving 75 HP of power at 6,750 rpm.

“AE75, schematic drawing”

-The two-cylinder is the AE50 with a displacement of 497 cc giving 50 HP at 6,750 rpm.

“AE50”