What is the advantage of the two cranks?
1. The way to get the most power from the exhaust gasses from a two cycle is with a uni-flow cylinder, which takes two cranks. With the two-crank engine, there are fewer corners for the exhaust gases to push around before gases get to exhaust recovery turbine blade. Answer: 2. With a one crank engine, top dead center is not 0 degrees. For all practical purposes and as far as the theory is concerned, it is 5 or 10 degrees before top dead center and 5 or 10 degrees after top dead center. We can have 10 to 20 degrees more or less dwell time at top dead center. With a two crank engine, we can allow one crank to lead the other crank by 10 or 20 degrees and extend the dwell time to 20 or 30 degrees more or less. We have lengthened the dwell time and shortened the critical time, which is good. With the D K W engine, split single, that has two rods, one master rod on one crank pin, the dwell time has been extended and the critical time has been shortened. We may rock the crank assembly back an
