So Felix Wankel's dream is officially dead ? First Mazda , now Norton ? Sad day .
Even though Norton has maintained an on again off again affair with rotary
racing machines Felix Wankel's dream proved to be not the answer for
motorcycles either... 3 problems still plagued them... heat... displacement
argument... seals...
Quote Cycle World...
Rotary engines indeed are simple and smooth, with fewer moving parts
than in the reciprocating variety, plus they are generally lighter and
more compact. But they are not without their problems, one of which is
excessive heat. In a reciprocating engine, heat is generated in one
place, the combustion chamber, which gets cooled between each burn
with a fresh shot of incoming fuel mixture. The combustion chamber in
a rotary, however, is not stationary; as it pushes the rotor through
its path, the chamber "moves" along nearly half of the engine's
internal surfaces between spark plug and exhaust port, and those
surfaces are never cooled with incoming fuel mixture. As a
consequence, a rotary runs hotter and radiates more heat than a piston
engine; and since lost heat is lost energy, the rotary gets poorer
fuel mileage.
Rotaries also do not make as much lower-rpm torque as piston engines
are capable of producing, but they can be tuned to make higher
horsepower numbers with less displacement (although displacement
comparisons between the two engine types are a constant source of
argument). In addition, the seals on the tips of the rotor have been
problematic since the design's very inception, frequently resulting in
rapid seal wear, leakage (causing increased oil consumption and power
loss) and even outright failure.