Like Bobby said, those are more spins than flips. I don't know how well you could do it on BoP, as it is kinda limiting to what kinda maneuvers are possible. But in 1946, I'm sure you could get the P-51 to do something like that. On BoP, I'd probably try to do a skid, and point the nose up, and just before stalling out, I'd flick the rudder around to get my guns on the enemy. But I'm not sure how well that'd work doing it in Training or something against AI. You'd have to practice with someone online to do it.

That first one is possible more or less in arcade mode. You need to be going full throttle and guy on your tale doing same. Point nose up then rapidly put right stick at 7 o'clock position. This slams on both rudder and knocks off throttle. If the guy on your tale fails to slow down you can slowly roll the right stick around it's edge counter clockwise. During this motion the guy on your tale should be drawing even with you and passing in front. Now slam throttle on and start shooting. If the guy on your tale is good the first part of this manuver leaves you wide open. Also he may read your move and slow down too. The key is how long you hold stick at 7 o clock before doing your move.
This works other way of course, 4 o'clock and clockwise
hope that helps

stick at 7 o'clock and 4 o'clock does both ?? what kind of stick are you using and do you have rudder controls on it as well?? my stick is broke at present so i cant try that out. and that first kinda one rotation spin move wasnt unusual for 51 jocks to use.....but each had their own variation.

I am talking here using the ps3 pad with throttle and rudder on the right hand analogue stick. What I meant by 7 and 4 o'clock is that those are your start positions depending if you want to skid right or skid left

I'll back you up on that one dkwookie, thats pretty much spot on how its done. Although personally I find that its better to get a bit the nose up a bit more and try for more rudder turn so that I get more of a vertical loop in to it. It effectively makes a bow shape in my case. It also helps to go full WEP as soon as the nose gets around.

It can be done in realistic as well but its much much harder to do effectively with a pad. A stick and peddles setup might have the best potential for it in realistic mode but I don't know if you can even get that for PS3. The peddles would allow you to get just the right amount of rudder pressure and stick angle so that you get it right on the stall envelope.

Yeah Lexandro I didn't think to mention that you keep your nose up (and a little roll to keep your horizontal position steady) all the way during the manoeuvre until you have a bead on opponent then you level out.

I was just throwing the plane about in arcade and getting stick positions and its left stick 6.30, right stick 7 o'clock. Start to roll right stick clockwise and flick left stick between 7 and 6.
This basically puts the plane into the horizontal spiral in the first video. In arcade match I was just playing it took 2 spirals to get on tale of a good player. Thats basically two tail led spiral loops. I tried it out in realistic and you can get maybe half a loop to three quarters before stall in the Spitfire mk 9. Perhaps its possible in another plane or if you have more practise in realistic. Doubt its possible in Sim as it really requires visual input of the aircraft.

Forgot to add that this technique works best if you can slow down rapidly from full throttle and keep relativly level until your opponent draws near. This increases effectiveness of your turn and increases chance your oponent will fly into your arc of fire as you complete your spiral. Also reduces chance of a flank burst from him as you enter spin!
It's probably the deadliest manouver in arcade if you can master it