Rotary Car Club - View Single Post - Using values to derive the general shape of a rotor

NoDOHC · 10-10-2010, 12:56 AM

You are confusing yourself by thinking too hard. The eccentricity measurement you seek is actually the distance that the eccentric shaft is offset from center. (15 mm).

The R' is the distance from the center of the eccentric shaft to the intended apex of the rotor. These constants describe the rotor housing by a set of parametric equations.

I have a parametric equation that I developed empirically by carefully measuring a rotor a while back. It should be pretty close (it yielded a net displacement of 653.8 cc per eccentric shaft revolution per rotor).

I can get it to you, but it will require some explanation, as it was developed for a math model of the rotary engine that I was working on at the time. It is a function of R in terms of some theta (which I don't remember what angle theta represents now).

I will PM you once I get to the bottom of this math.

10-10-2010, 12:56 AM	#5
NoDOHC The quest for more torque Join Date: Sep 2008 Location: Sheboygan, Wisconsin Posts: 855 Rep Power: 17	You are confusing yourself by thinking too hard. The eccentricity measurement you seek is actually the distance that the eccentric shaft is offset from center. (15 mm). The R' is the distance from the center of the eccentric shaft to the intended apex of the rotor. These constants describe the rotor housing by a set of parametric equations. I have a parametric equation that I developed empirically by carefully measuring a rotor a while back. It should be pretty close (it yielded a net displacement of 653.8 cc per eccentric shaft revolution per rotor). I can get it to you, but it will require some explanation, as it was developed for a math model of the rotary engine that I was working on at the time. It is a function of R in terms of some theta (which I don't remember what angle theta represents now). I will PM you once I get to the bottom of this math. __________________ 1986 GXL ('87 4-port NA - Haltech E8, LS2 Coils. Defined Autoworks Headers, Dual 2.5" Exhaust (Dual Superflow, dBX mufflers) 1991 Coupe (KYB AGX Shocks, Eibach lowering springs, RB exhaust, Stock and Automatic)