Re: Help with the double haul, please?
Going on the assumption that you're asking when to shoot line during the false casts, you should do so immediately after the "follow" part of tha haul, as you're bringing your hands together after the pull. It will take some practice to learn how much line you can shoot on each false casts and this depends on many variables.
The main thing that will allow you to shoot more line is line speed. The more line speed you are generating on those false casts, the further the line will carry before gravity starts to bring it down. The casting loops being tight in both directions will greatly add to this.
Wind can also affect this. If you have the wind at your back, you may not be able to shoot much line on the back-cast, but you can take advantage of the wind by throwing your forward cast high and letting the wind help it unroll. Into the wind, the situation would be flip-flopped. Just always try to make sure the cast into the wind is a tight loop.