Yes you can run a car with a rotary. The displacement is calculated with a
factor of 2 times the "displacement" - see 16.6.C in the Solo II rules. For
a formula car, the weight for the car would appear to fall under the "up to
3 liters" rule which is 1285 lb with driver. If you build the car with a
12A rotary to the C Sports Racing Rules, it only has to weigh 1114 lb with
driver (for a single seater). CSR has some limits on engine port
configuration and carbs - see the GCR. If you go beyond the port and carb
limits in CSR, you would end up in ASR and would have to weigh 1280 lb with
driver.
Bryan
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