A few thoughts on purely defensive moves:
What they have in common is a reverse of position. From a point in FRONT of the bad guy, you try to make him overtake you and have him end up in your own gunsights. Preferrably all that without him hitting you

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"Simple" overshoot tactic:Just reduce throttle and try to fly *slower* then your opponent. To help you slow down faster, you can sideslip - that means add full rudder to one side and keep plane level with aileron input. Your plane will be moving "sideways", the added drag slows you down.

While sideslipping can make shooting you a little more difficult (youre not going where your planes nose is headed!) - as soon as your enemy notices what youre doing he can adapt the direction he pulls lead to and youre an easy target. So if the speed difference between both planes is very little and the opponent isnt completely new, its a risky move, that relies mostly on surprise effect.
Flat Scissors:The objective in flat scissors is the same as in all overshoot tactics. You try to reduce your FORWARD movement as much as possible to force the opponent out front.

By flying zig zag, you reduce your forward moving speed far below minimum flying speed. Use rudder to help your roll (also adds a little sideslip and makes you a more difficult target) and drop flaps if you need to (speed!). Try not to get a "rhythm" going - keep the change of direction random, so the opponent can "foresee" your next move.
Also, you make it more difficult for an opponent to hit you by keeping your turns *out of phase* with his. Watch him in back view while scissoring and change direction just before his wings line up with yours. That way he cant get a tracking shot, just quick snap shots while you pass in front of him.
www.slowcat.de/slowcats1/AHTC/FlatScissor.ahfThis is a film of Schutt scissoring a Spit in his 109 that shows what happens. Best watch that one in External View with Trails, Icons and Recorded Views checked. Notice how Schutt keeps watching the Spit and adjusts his turns. The Spit overshoots fast, only getting a few pings... as soon as hes out front he pays the price.
The film also demonstrates the dangers of a scissor. You get yourself usually low and always SLOW. That leaves you open for attacks, since you dont have many options. In this case the a6m took advantage of Schutts position.
Barrel Roll Defense/Rolling Scissors:While the Flat Scissors only take place in 2 dimensions, the Rolling Scissor also uses the vertical, third dimension. Its basically two planes barrel rolling around each other (barrel roll = corkscrew spiral).
Ill leave the further explanation on that to BadBoy:
http://www.hitechcreations.com/forums/showthread.php?s=&threadid=184939Break turn reversal:Thats my favorite move in HMk1, against a HIGHER and FASTER opponent. The move has two objectives: Evade the guns and get the attacker to bleed off his Energy by turning while hes fast (high G turn).
What i do is this: I watch the enemy closing, basically presenting him my tail. I want him to dive in on me from behind with considerably more speed than I have. For my own speed i try to keep it low enough so i can turn tightly, but not too slow, so im still able to move - around 200-300 mph (depending on plane).
Now when the enemy is at about 1.5 K out (again depending on closure rate... the faster he approaches, the further away you need to start) i slowly start my turn. a VERY gentle, easy turn... I still want the guy to follow me, I need to get him to commit himself to following me. He needs to think hell be able to shoot me in a second. Then, as he comes closer I slowly *tighten* the turn... always JUST denying him his shot (hell have to pull inside my turn for lead). When hes at about 800, I seriously tighten my turn, chop throttle if necessary. He wont be able to follow. When I see himgetting carried outside my turn circle in the back view (=overshoot!), I hit full throttle + WEP, go vertical (flaps if your speed makes them necessary) and roll over into behind him (thats almost a barrel roll kind of move).
www.slowcat.de/slowcats1/AHTC/BreakturnRev.ahfA film of me demonstrating the move in the TA. View it in Fixed View, with Trails and Icons checked. Adjust your viewpoint with the sliders so you got a good overview on both planes. This move takes some practice to get the timing down. If you need a training partner, you know where to find me

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Now never forget. For every move in the book theres a counter move. None of the above moves are "foolproof". The better the pilot youre up against, the harder it will get to shake him.