In OR there is no accounting. When you pull down the motor selection list it has wheather it's a reload or not and adjusts the mass as needed. Any additional mass from spacers is neglegable. I've been getting remarkably accurate results. If it really matters to you you can add the weight of the spacer in the motor tube as a generic mass object. Remember, most sims only come out 85-95% accurate (My experience and those I fly with). They get you into a workable ballpark but won't give you the homerun. FWIW
Last edited by stantonjtroy; 6th June 2012 at 01:03 AM.