I have desktop dyno but unfortunately there is not rotary support. Does anyone know of any similar program that supports rotaries?

 

Have a link to the program your using currently?

 

im not exactly sure what you are asking but i have dyno 2000

 

There's some that exist or existed at one point, but not in the public domain. If you poke around SAE papers enough you can find some that talk about simulating what's happening inside rotary engines, and Mazda came up with some quite effective models that they used to optimize some of the MFR engines, but... well. Unless you're capable of coming up with one based on governing equations (which, doing so accurately is nontrivial even for piston engines, and no single paper goes into all the differences that need consideration much less how to derive *those* governing equations) or have contacts with someone who was in the exact right portion of Mazda's racing operations in the late 80s-early 90s who (probably against company policy) somehow had the source code for a proprietary program... no, there isn't an equivalent.