The parts in comparison to piston engines isn’t quite honest, actually it’s a complete lie.
It is commonly thought & told that there are only 3 moving parts to a twin rotor Wankle type engine; where in fact, there are many more.
Eccentric shaft
2x rotors
6x apex seals (3x apex seals per rotor)
If you use OEM apex seals, they come in variants (1, 2 & 3 pieces) I opt for 2mm 2 piece apex seals in my builds.12x apex seal springs (inner & outer) 6x per rotor
12x corner seals (6x per rotor)
12x Corner seal springs (6x per rotor)
12x side seals (6x per rotor)
12x side seal springs (6x per rotor)
Those are all the moving components of a rotary engine (you can argue the oil control rings & springs, but they don’t see continuos movement…
So when you say the rotary only has 3 moving parts, realize that you sound like a person who has never built a rotary engine.
So add all that up & it comes out to 87 moving parts on a 2 piece apex seal’d 2 rotor engine (not including the oil control rings & accommodating springs)
And if you argue that seals & springs don’t count as moving parts, tell me why an engine loses compression after overheating (the springs lose their temperament & they lose their EFFECTIVE RANGE OF MOTION & STRENGTH)
P.S. I still love the rotary & think it’s one of the greatest engines ever developed.
