"You will not master this move simply by flying offline with smoke enabled. You will want to have a trainer in the back seat at some point, or a friend, who can watch your move and evaluate it. Be patient. It is an extremely deadly move and very rewarding when you can reverse a situation from your six to your twelve for a kill."

进攻性桶滚(Offensive Barrel Roll)

记住：在任何情况下防止飞越敌机，飞越敌机或在敌机前方飞行是致命的错误而它多半要你付出“生命”的代价，飞越敌机是由于无法消除的过高接近率；你太快的接近敌机而无法及时减速，在这种情况下，桶滚是一种解决的方法，如果你无法以拉高机首的方法快速的减低速度，将操纵杆拉到底并完成一个与现在转弯方向相反的副翼滚。当滚至敌机外侧时，机首抬高使速度下降，这样就防止了飞越敌机。

“进攻性桶滚”的第一目的就是在对方变换动作时，自己始终维持在地方尾部半球，当盘旋性能不如对方时，本机一味的盘旋反而会被反咬，所以通过桶滚动作来提升高度，减少相对速度，把速度动能换成高度势能，通过垂直面上的机动来使自己保存能量，掌握主动。

防御性桶滚(Defensive Barrel Roll)

当拥有足够AOT时利用桶滚可以强迫攻击者飞越它以避免你射击，防御桶滚必须小心的选择时机，如果太早使用桶滚将导致敌机继续跟踪你而不受影响；太晚使用则敌机可能已经开始射击。完美的使用时机必需令敌机感到意外且逼迫它在飞越你前没有足够的时间作出反应。

“高G桶滚”就是典型的防御性动作，在大过载盘旋时，守方通过盘旋中的一个桶滚来延迟自己的相对盘旋速度，提升高度，同时能够在盘旋中保持一定的速度能量和高度势能，为下一步对抗做打算。

（以下摘自◎6《Basic Fighter Maneuvers：基本战斗机机动》一文，特此感谢）

Another variation of the lag roll is known as a barrel-roll attack. This maneuver is useful in making the transition from lead pursuit in the target's beam area or forward hemisphere to a rear-hemisphere position. Such a situation may develop when an attacker is performing lead pursuit against a bogey at fairly long range and the defender turns toward the attacker. At some point the attacker may realize that continued lead pursuit would result in passing the bogey at very high AOT (i.e., in his forward hemisphere). A barrel-roll attack is initiated with a wings-level pull-up and a roll toward the bogey, as with the lag roll. Since the range to the target is considerably greater, however, the climb established is continued for a longer time, resulting in a greater altitude advantage over the defender. Again the rolling pull is timed with the target's motion so the attacker arrives at a position well above the bogey, inverted, before passing slightly behind the defender. As the attacker approaches the overhead position his altitude advantage and gravity assist may provide the opportunity for him to pull hard down toward the target, remaining inside the horizontal boundaries of the bogey's turn, for a "high-side" (i.e., coming down from above and to one side) gun-firing pass. Or, depending on relative aircraft performance, available weapons, or bogey maneuvers, the attacker can delay and moderate his pull-down slightly to arrive at a lag-pursuit position. An illustration of this second option would look much like Figure 2-5, except that, because of the starting conditions, most of the initial phases of the manuever (i.e., the pull-up and roll) would take place in the defender's forward hemisphere. Often there will be a greater heading difference between the fighters at position "2," making lag pursuit impractical. In this case, between times "2" and "3," the attacker may turn steeply nose-low, using lead pursuit to pull inside the bogey's turn. This maneuver keeps nose-tail separation from increasing greatly.
后置滚转的另一个变形是桶滚攻击。该机动用于将位于敌机射程范围内或前半球的前置追击转向后半球。远距离前置追击时，敌机可能掉头；如果继续追击，可能以高AOT越过目标（如在其前半球）。像后置滚转一样，桶滚攻击是水平拉起并向敌机滚转。由于距离较远，爬升需要更长的时间，但会获得高度优势。当攻击者到达敌机上方的位置，在越过目标之前停止拉升，全力俯冲，将自己的投影保持在敌机的航道圈内，进行“高面”机枪射击。或者根据自己的性能、武器装备和敌机的机动调整俯冲，进行后置追击；类似图2-5，不同的是由于初始状态不同，初始机动（如拉起和滚转）发生在敌机的前半球。特别是在时间2时不能使用后置追击，而应该在时间2-3之间更快地向下转弯，使用前置追击切入敌机转弯内圈。该机动可以保持距离不至过远。

One of the common mistakes made in the employment of lag rolls and barrel-roll attacks is attempting to use them without sufficient initial lead pursuit. Returning to Figure 2-5, note that the attacking and defending aircraft are aligned nearly parallel at time "I." Visualize what would happen if the attacker's nose at time "1" were pointed at, or only slightly ahead of, the bogey. First, as the attacker started his pull-up, the bogey would disappear beneath the nose, requiring the attacker to perform a very quick roll just to maintain sight, and greatly reducing any altitude advantage which may be achieved over the bogey. Without the climb between times "1" and "2," the attacker's forward velocity component may cause him to overshoot the bogey's flight path grossly, or force him to pass too far behind the target, allowing nose-tail separation to increase greatly. The lack of sufficient altitude advantage at time "2" also reduces the gravity assist available to the attacker for pulling his nose back toward the bogey to maintain an angular advantage.
使用后置滚转和桶滚攻击时常犯的一种错误是之前的前置追击不到位。回到图2-5，注意双方飞机在时间I平行排列。观察在时间1当攻击者机头指向或略朝向敌机时会发生什么。首先，当攻击者拉起，敌机就会从视野中消失，必须快速滚转以保持视野，同时又大大损失了高度优势。如果攻击者在时间1-2之间不爬升，就会超越射击，甚至冲过头。在时间2攻击者俯冲过快，丢失了高度，无法及时拉起以保持角度。

屠夫之鸟原文摘录