Is there a multi-engine written?
The requirements for obtaining this rating are similar to those already met during the process of obtaining Private or Commercial certificates. However, the path to obtaining a multi-engine rating requires no formal written exam, but pilots must show their knowledge through the completion of a checkride. Adding a multi-engine rating to an existing commercial certificate has no time requirements at all, a pilot must only become proficient flying the aircraft. On average, in my experience, 10 hours is plenty of time to get checkride ready for a multi add-on. Some students need more time to become acclimated.
What engine type is best?
As a general rule, for engines with the same total engine size, the one with more cylinders will be more efficient and has greater power. Multi-cylinder engines are therefore more efficient than single-cylinder engines. Engine performance also depends on the number of cylinders. V6 engines typically have better fuel economy than a V8, while V8 engines generally have more power than V6 engines. If you’re in the market for a vehicle, knowing the differences and advantages of the V6 versus V8 engine can be helpful when you are trying to make a purchase decision.