:) You got him in the end.I would suggest you try to get a bit nearer.Were you using unlimited ammo? seems to have a lot of bullets there

Sailor Malans 10 rules of air combat
"TEN OF MY RULES FOR AIR FIGHTING"
Wait until you see the whites of his eyes. Fire short bursts of 1 to 2 seconds and only when your sights are definitely 'ON'.
Whilst shooting think of nothing else, brace the whole of the body, have both hands on the stick, concentrate on your ring sight.
Always keep a sharp lookout. "Keep your finger out!"
Height gives You the initiative.
Always turn and face the attack.
Make your decisions promptly. It is better to act quickly even though your tactics are not the best.
Never fly straight and level for more than 30 seconds in the combat area.
When diving to attack always leave a proportion of your formation above to act as top guard.
INITIATIVE, AGGRESSION, AIR DISCIPLINE, and TEAM WORK are the words that MEAN something in Air Fighting.
Go in quickly - Punch hard - Get out!
Also! How to get nearer the enemy aircraft? I put my throttle 100 percent and the pitch high which I think is high rpm? But its takes longer then I expected or is it just me?