What are COUNTER-ROTATING PROPS: There is a big difference between these two boats. The first boat shown has one prop for each engine. Each engine spins counter to one another to avoid side effect. If both props spin the same way in forward, the stern will drift to one side, making a difficult to handle. The other vessel has two engines with two props each. Each engine has its own counter rotating blades. #howtoboating #howto #boating #propellers #props #engines #blades #captain #sideeffect #wal

One distinctive feature of the P-38 Lightning is its counter-rotating propellers. In most single engine aircraft, several aerodynamic forces combine to pull the plane to the left, a set of effects pilots learn early as “turning tendencies.” With twin engines, designers can cancel out much of this behavior by having the propellers spin in opposite directions. On the P-38, the blades rotate outward at the top, which balances the forces from each engine and eliminates a critical engine. The result